T775U Series 2000 Electronic
Stand-Alone Controller
INSTALLATION INSTRUCTIONS
PRODUCT DESCRIPTION
The T775 electronic stand-alone controllers are the next
generation of universal controls capable of remote
sensing of temperature, humidity, pressure, etc. and
providing switched and proportional outputs to various
types of loads. A built-in time clock is standard.
The T775U controller allows a wide range of sensors to
be configured. Humidity, pressure, temperature, or any
0-5 Vdc, 0-10 Vdc, or 4-20 mA input is supported.
A Reset function is available where the Sensor B
temperature (e.g. outside temperature) is used to provide
reset control for Sensor A (e.g. humidity). For example,
as the outside temperature gets colder, the setpoint can
automatically be adjusted to prevent condensation.
IMPORTANT
The T775U is an operating control, not a limit or
safety control. If used in applications requiring
safety or limit controls, a separate safety or limit
control device is required.
Table 1. T775U Controller Configurations.
Analog
(Mod)
SPDT
Output Relay
Nbr of
Sensor Sensors
Controller
a
b
Model
Description
Replaces
Reset Outputs Outputs Inputs Included Enclosure
d
T775U2006
H775A1006
H775A1022
H775A1048
H775A1063
H775B1005
Yes
2
2
None
NEMA 1
2
Universal:
Humidity,
Pressure,
Temperature,
etc.
c
H775C1004
H775D1003
c
c
H775E1002
N/A
e
T775U2016
Yes
2
2
None
NEMA 1
2
a
The T775U includes a digital input for use with the disable or setback option.
b
c
The modulating (analog) outputs may be 4-20 mA, 0-10 Vdc, 2-10 Vdc, or Series 90 selectable.
For the H775C1004, H775D1003, and H775E1002 model replacement, the T775U only partially replaces the function
of these devices. Check application for suitability.
d
e
For the sensor inputs, Sensor A can be 0-10Vdc, 4-20mA, or a standard temperature input. Sensor B is a standard
temperature sensor input only. Sensor B is used only for reset on the T775U2001.
The T775U2016 can control Sensor A (universal) and Sensor B (temperature) independently, like other standard
T775 controllers.
E4436
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
Controller Dimensions
TOP
1 (25.5)
7/8 (22.5)
2 15/16 (74)
4 13/32 (112.1)
3 31/32 (101)
1/2 (12.4)
LEFT
RIGHT
4 1/16 (103.4)
1/64 (3.8)
8 5/32
(207.1)
7 23/32
(196)
4 1/16 (103.4)
2 11/16 (68.1)
2 13/16 (71.8)
FRONT VIEW
7/8 (22.5)
7/8 (22.5)
7/8 (22.5)
M24546
1 (25.5)
BOTTOM
Fig. 1. T775U Dimensions in inches (mm).
6. Programming the Controller with no Reset – see page 25
or
Programming the Controller with Reset – page 28.
7. Scheduling (optional)— see page 33.
BEFORE INSTALLATION
Review the “Specifications” on page 37 before
installing the controller.
Additional topics are:
•
•
•
•
Sensor calibration begins on page 10.
Interface overview begins on page 11.
Summary menu begins on page 37.
Troubleshooting begins on page 37.
When Installing This Product
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check ratings given in instructions and on the prod-
uct to ensure the product is suitable for your appli-
cation.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
MOUNTING
This section describes the mounting procedures for the
controller and temperature sensor(s).
Controller Mounting
IMPORTANT
INSTALLATION AND SETUP
Avoid mounting in areas where acid fumes or
other deteriorating vapors can attack the metal
parts of the controller circuit board, or in areas
where escaping gas or other explosive vapors
are present.
The following installation procedures are typically
performed in the order listed:
1. Mounting — see “Mounting” below.
2. Wiring — see “Wiring” on this page.
3. Checkout — see page 10.
4. Interface and Programming overview – see page 11.
5. Setup – see page 13.
IMPORTANT
The controller must be mounted in a position that
allows clearance for wiring, servicing, and
removal.
3
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
Use a screwdriver to pry out only the knockouts that you
will use.
WIRING
If mounting on DIN rail, be sure to remove the knockouts
before mounting. See “Controller Wiring” on page 7 and
Fig. 12 on page 9 for recommended knockout usage and
locations. If you do not use an opened knockout be sure
to cover it.
All wiring must comply with applicable electrical codes
and ordinances, or as specified on installation wiring
diagrams. Controller wiring is terminated to the screw
terminal blocks located inside the device.
The remainder of this section describes the sensor wiring
and the T775U controller wiring.
Mount the controller on any convenient interior location
using the four mounting holes provided on the back of the
enclosure using #6 or #8 screws (screws are not provided
and must be obtained separately). Use controller
dimensions in Fig. 1 on page 3 as a guide.
Wiring Connections Access
To access the wiring connections, remove the two screws
on the left side of the enclosure and gently swing open the
top. Be careful to not stress the ribbon cables that
connect the keypad and LCD display to the controller
circuit board.
The controller may be mounted in any orientation.
However, mounting in the orientation shown in Fig. 1 on
page 3 permits proper viewing of the LCD display and use
of the keypad.
Temperature Sensor Wiring
Humidity, Pressure, and Universal
Sensor(s) Mounting and Location
These sensors may be mounted on a wall or panel.
Follow the installation instructions specific to the sensor
you are installing.
CAUTION
Electrical Shock Hazard.
Can short equipment circuitry.
Make sure that metal tube of sensor does not
short against T terminals in wall-mounted case.
Temperature Sensor(s) Mounting
and Location
IMPORTANT
Temperature sensors may be located up to 1,000 feet
(304 m) from the T775U controller. See Table 4 on
page 11 for calibration guidelines.
Poor wiring practices can cause erratic readings
from the sensor. Avoid the following to ensure
proper operation:
The sensors may be mounted on a wall or panel for
sensing space temperature, strapped to a pipe or inserted
in an immersion well (see Fig. 2) for hot or cold water
sensing, or taped to a standard cap or bulb holder for duct
air sensing. To prevent moisture or condensation entering
the sensor through the lead wire holes, mount the sensor
with the lead wires exiting the bottom of the sensor.
•
•
•
•
•
•
Do not route the temperature sensor wiring with
building power wiring.
Do not locate the temperature sensor wiring next
to control contactors.
Do not locate the temperature sensor wiring near
electrical motors.
Do not locate the temperature sensor wiring near
welding equipment.
Make sure good mechanical connections are
made to both the sensor and the controller.
Do not mount the sensor with the lead wire end
pointing up in an area where condensation can
occur.
NOTES:
1.
The included sensor is not designed for very
wet applications. For immersion applications,
an immersion well is used.
2.
3.
Heat conductive compound must be used in
immersion wells.
See “Temperature Sensors (Sensor A or B)”
on page 2 for this type of installation.
If any of the above conditions cannot be
avoided, use shielded cable.
SENSOR
PLACED
IN WELL
USE HEAT
CONDUCTIVE
COMPOUND
NOTE: Each T775 controller must be wired to its own
sensor(s). However, a benefit of the T775
controller’s accuracy is that there is no more
than a 2°F differential between any two T775
controllers.
Reset Temperature Control
If you are implementing two-sensor reset control, Sensor
A must always be the controlled temperature and Sensor
B must always be the controlling temperature.
IMMERSION
WELL
1/2 NPT
M24379
For example, in a reset control based on outside
temperature, Sensor A must be the inside sensor and
Sensor B must be the outside sensor.
Fig. 2. Sensor inserted in immersion well.
NOTE: Multiple sensors may be parallel-series wired to
sense average temperatures in large spaces.
See Fig. 3 on page 5.
Multiple Parallel Temperature Sensors
Multiple sensors can be parallel-series wired to sense
average temperatures in large spaces. To maintain
control accuracy, the number of sensors to be parallel-
2
series wired must be of the n power (for example, 4, 9,
16, etc.). See Fig. 3.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
Temperature Sensor Wire Type and Size
SENSORS
Temperature sensors use standard AWG 18/2 unshielded
wire. For cable runs greater than 25 feet or where
electrical interference may be a problem, shielded cable
is recommended. See Fig. 4.
Refer to “Temperature Sensor Calibration” on page 10 for
wire size selection where cable runs are longer than
25 feet.
TO T775 CONNECTIONS (SENSOR A) OR (SENSOR B).
M24548
Fig. 3. Parallel-series wiring of sensors.
SHIELDED
CABLE
T
T
SENSOR A
NOTE: SHIELDED CABLE MUST BE
CONNECTED TO A SEPARATE EARTH
GROUND.
1
T
T
SENSOR B
HOWEVER, DO NOT GROUND
SHIELDED CABLE AT SENSOR END.
2
SHIELDED
CABLE
SENSOR
NOTE: TO MINIMIZE NOISE PICKUP,
MAKE SENSOR CONNECTION FROM
SHIELDED CABLE AS CLOSE AS
POSSIBLE TO SENSOR BODY.
SENSORS A AND B ARE POLARITY INSENSITIVE WHEN USING A 1097 OHM PTC TEMPERATURE SENSOR.
SENSOR B IS USED ONLY IN RESET APPLICATIONS ON THE T775U20006.
1
2
M24549A
Fig. 4. Sensor Wiring — 2-wire shielded cable connection from Sensor A to temperature sensor.
NOTES:
Humidity, Pressure, and Universal
1.
Other transmitters can be wired in the same
manner. For example, the 0-10Vdc wiring
shown in Fig. 5 on page 6 with the H76XX
sensor can also be done with the P7640 or
any other transmitter.
Sensor Wiring
Sensors with a 0-5 Vdc, 0-10Vdc or 4-20mA input to the
T775U must be wired to the Sensor A terminal. Sensor B
is used only as a temperature input.
2.
The T775U V terminal outputs 18 Vdc.
Sensors use standard AWG 18 unshielded wire. For cable
runs greater than 25 feet, shielded cable is
recommended.
The sensors in Fig. 5 – 8 beginning on page 6 are
examples and illustrate voltage and current wiring for 3-
wire and 2-wire sensors to the Sensor A terminal. For
terminal wiring details, see Fig. 11 and Table 2 on page 8.
Other sensors are supported. See sensor descriptions on
page 2.
5
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
SHIELDED CABLE
NOTES:
SHIELDED CABLE
NOTES:
C
C
S
V
T
T
1. SHIELDED CABLE MUST BE
S
1. SHIELDED CABLE MUST BE
CONNECTED TO A SEPARATE
EARTH GROUND. HOWEVER,
DO NOT GROUND SHIELDED
CABLE AT SENSOR END.
SENSOR A
SENSOR A
SENSOR B
CONNECTED TO A SEPARATE
V
1
EARTH GROUND. HOWEVER,
T
T
SENSOR B
DO NOT GROUND SHIELDED
CABLE AT SENSOR END.
2. TO MINIMIZE NOISE PICKUP,
MAKE SENSOR CONNECTION
FROM SHIELDED CABLE AS
CLOSE AS POSSIBLE TO
SENSOR BODY.
2. TO MINIMIZE NOISE PICKUP,
MAKE SENSOR CONNECTION
FROM SHIELDED CABLE AS
CLOSE AS POSSIBLE TO
SENSOR BODY.
C
S
EXAMPLE OF
P7640A
S
C
V
EXAMPLE OF
H76XX HUMIDITY
SENSOR;
PRESSURE
SENSOR;
0-10 VDC
0-10 VDC
CONNECTION
CONNECTION
1
THE T775U WILL ONLY ACCEPT 0-10 VDC AND 4-20 MA SENSORS.
IF REPLACING AN H775 CONTROLLER THAT USES A C7600B OR OTHER
2-10 VDC SENSOR, THE SENSOR MUST BE REPLACED. REPLACE THE
C7600B2008 SENSOR (2-10VDC OUTPUT) WITH THE H7655A1001
(0-10 VDC OUTPUT) SENSOR. THE H7655A1001 SENSOR USES THE SAME
L1
(HOT)
24 VAC
L2
ENCLOSURE STYLING AND WIRING AS THE C7600B.
M24550
M24551
Fig. 5. Sensor Wiring — 3-wire shielded cable
connection from Sensor A to 0-10 Vdc sensor
(H76xx humidity sensor shown).
Fig. 7. Sensor Wiring — 2-wire shielded cable
connection from Sensor A to a 0-10 Vdc sensor
using separate transformer.
EXAMPLE OF P7640A 4-20 MA SENSOR CONNECTION
SHIELDED CABLE
1
C
S
V
T
T
3
SENSOR A
SENSOR B
2
S
V
PWR OUT COM ZERO
1
SHIELDED CABLE MUST BE CONNECTED TO A SEPARATE EARTH GROUND.
DO NOT GROUND SHIELDED CABLE AT SENSOR END.
12-30 VDC
POWER SUPPLY
S
SHIELDED CABLE
TO MINIMIZE NOISE PICKUP, MAKE SENSOR CONNECTION FROM SHIELDED
CABLE AS CLOSE AS POSSIBLE TO SENSOR BODY.
2
3
+
–
THE T775 HAS AN INTEGRAL LOAD OF 500 OHMS WHICH RESULTS IN A
10V DROP AT 20MA. TO USE 4-20MA LOOP POWERED WIRING, THE SENSOR
MUST BE CAPABLE OF OPERATION WITH 8V OR LESS ACROSS ITS TERMINAL.
C
M24890C
C
S
SENSOR A
V
Fig. 6. Sensor Wiring — 2-wire shielded cable
connection from 4-20 mA sensor to
T
SENSOR B
T
T775 controller (loop powered wiring).
NOTES:
1. SHIELDED CABLE MUST BE
CONNECTED TO A SEPARATE
EARTH GROUND. HOWEVER,
DO NOT GROUND SHIELDED
CABLE AT SENSOR END.
2. TO MINIMIZE NOISE PICKUP,
MAKE SENSOR CONNECTION
FROM SHIELDED CABLE AS
CLOSE AS POSSIBLE TO
SENSOR BODY.
M24889A
Fig. 8. Sensor Wiring — 2-wire 4-20mA sensor input
to T775 controller using a separate (Vdc only)
transformer.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
See Fig. 11 on page 8 for locating the appropriate power
input, remote sensors input, low voltage, contact closure,
and load output terminals.
Controller Wiring
Access to the terminals can be gained through standard
conduit knockouts (A through E in Fig. 11 on page 8)
located around the perimeter of the enclosure:
WARNING
Can cause severe injury, death or property
damage.
Disconnect power supply before beginning wiring,
or making wiring connections, to prevent electrical
shock or equipment damage.
Electrical Shock Hazard.
•
Knockouts A and B should be used only for sensor and
low-voltage wiring.
•
Knockouts C, D, and E can be used to gain access to
the load relay output terminals and 120/240 Vac power
wiring.
Controller Wiring Method
CAUTION
Wire the sensors and outputs, then wire the power
connection.
Do not use 24 Vac power to power any external
loads if 120 Vac or 240 Vac is used to power
the T775U.
Each terminal can accommodate the following gauges of
wire:
•
Single wire – from 14 AWG to 22 AWG solid or
stranded
•
Multiple wires – up to two 22 AWG stranded
CAUTION
A separate earth ground is required.
Equipment damage can result if the earth ground
is not connected. See Fig. 9 and Table 2 on
page 8.
For 24, 120, or 240 Vac power connections:
Single wire – from 14 to 18 AWG solid or stranded
Using Fig. 10 on page 7 as a guide, prepare wiring for the
terminal blocks, as follows:
1. Strip 1/2 in. (13 mm) insulation from the conductor.
2. Cut a single wire to 3/16 in. (5 mm). Insert the wire
in the required terminal location and tighten the
screw.
3. If two or more wires are being inserted into one ter-
minal location, twist the wires together a minimum
of three turns before inserting them to ensure
proper electrical contact.
CAUTION
Equipment Damage Hazard.
Electrostatic discharge can short equipment
circuitry.
Ensure that you are properly grounded before
handling the unit.
4. Cut the twisted end of the wires to 3/16 in. (5 mm)
before inserting them into the terminal and tighten-
ing the screw.
5. Pull on each wire in all terminals to check for good
mechanical connection.
1. STRIP 1/2 IN. (13 MM)
FROM WIRES TO
BE ATTACHED AT
ONE TERMINAL.
1/2 (13)
1
2. TWIST WIRES
TOGETHER WITH
PLIERS (A MINIMUM
OF THREE TURNS).
W
C
+
2
NO HIGH VOLTAGE. CLASS 2 WIRING ONLY.
1
2
EARTH GROUND TERMINAL MUST BE CONNECTED
TO CONDUIT CLAMP LOCALLY.
M24296
3. CUT TWISTED END OF WIRES
TO 3/16 IN. (5 MM) BEFORE INSERTING
INTO TERMINAL AND TIGHTENING SCREW.
THEN PULL ON EACH WIRE IN ALL
TERMINALS TO CHECK FOR
Fig. 9. Earth Ground.
IMPORTANT
Poor wiring practices can cause erratic readings
GOOD MECHANICAL CONNECTION.
M24552
from the sensor. To ensure proper operation,
ensure that good mechanical connections are
made to both the sensor and the controller.
Fig. 10. Attaching two or more wires at terminal
blocks.
IMPORTANT
When wiring the input power, only one source of
power can be applied to the T775U (24 Vac or
120 Vac or 240 Vac).
7
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
Controller Wiring Details
The wiring connection terminals are shown in Fig. 11 and
are described in Table 2. See Fig. 12 – Fig. 18 beginning
on page 9 for typical T775U wiring applications.
Fig. 11. T775U Terminal and Feature Locations.
KNOCKOUT A
C – T
SENSOR A
B
S + T
MOD 1
–
+
R
V
T
T
1
W
2
SENSOR B
B
MOD 2
–
+
R
W
–
+
DIGITAL
INPUT
KNOCKOUT B
POWER
3
C
+
24 VAC
POWER
120/240 VAC
1
2
WHEN USED FOR TEMPERATURE OR 4-20mA SENSING, SENSORS
AND B USE THE TWO TT CONNECTIONS AND ARE POLARITY
INSENSITIVE.
A
OUTPUT
RELAY 2
NO
C
NC
OUTPUT
RELAY 1
NO
C
NC
FOR MOD 1 AND MOD 2 CURRENT (mA) OR VOLTAGE (VDC) OUTPUT,
USE SIGNAL (+) & COMMON (-).
FOR MOD 1 AND MOD 2 SERIES 90 OUTPUT, USE W, R, & B.
KNOCKOUT C
KNOCKOUT D
3
A SEPARATE EARTH GROUND IS REQUIRED FOR ANY POWER
SOURCE (24, 120, OR 240 VAC)
KNOCKOUT E
M24553A
Table 2. Description of Wiring Terminal Connections.
Terminal
Label
Connection
Description
Connection
Terminal Label
Outputs
Description
Sensors
C – common 0-10 Vdc input: Universal
S – signal sensor for humidity, pressure,
V – voltage temperature, etc.
Mod 1
Mod 2
+ - (Vdc or mA)
Modulating Output
b
W R B (Series 90)
a
Sensor A
S and V
4-20mA input; see Fig. 7 on
page 6
24 Vac Power
Temperature Sensor; polarity
insensitive
24V +
+
-
24 Vac Hot
T T
T T
Common
Ground
24 Vac Common
c
Sensor B
DI
Temperature Sensor; polarity
insensitive
Earth Ground
120 or 240 Vac Power
Input
120 Vac
Common
240 Vac
120
120 Vac Power
Common
+ -
Digital Input (dry contact)
Outputs
COM
240
240 Vac Power
Relay 1
Relay 2
NO / COM /
NC
120-240 Vac Relay Output
a
For applications that do not use Reset, only Sensor A is available for use.
For Series 90 connections, you must insert a 340 Ohm resistor across terminals R and W. See Fig. 17 on page 10.
The resistor is included with the controller.
b
c
A separate earth ground is required for all installations regardless of the power source (24, 120, or 240 Vac).
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
WIRING APPLICATION
EXAMPLES
C – T
S + T
V
1
Fig. 12 – 18 illustrate typical controller wiring for various
applications.
NOTE: The electronic Series 90 output provided with
modulating T775 models can not drive electro-
mechanical slidewire devices like older Series 3
modulating meters (prior to Series 6), V9055s,
and S984s.
NOTE: For a wiring example of three Series 90 Modutrol
Motors, refer to the T775A/B/M Series 2000
Electronic Stand-alone Controllers Installation
Instructions (form 62-0254).
C
+
120V
COM
2
C – T
1
S + T
V
NO
COM
NO
C
NC
NO
C
NC
NO
LOAD 2
LOAD 1
COM
1
2
FOR SPECIFIC SENSOR WIRING (TEMPERATURE, HUMIDITY,
PRESSURE, ETC), REFER TO THE SENSOR WIRING SECTIONS
BEGINNING ON PAGE 4.
L1
(HOT)
24 VAC
FOR 240 VAC LOAD, CONNECT TO 240 TERMINAL.
M24555A
L2
Fig. 14. Wiring for Two-stage Control with 120 or 240
Vac (120 Vac Input and 120 Vac Load).
C
+
LOAD 1
LOAD 2
NO
COM
NO
C
NC
NO
C
NC
COM
NO
–
+
DIGITAL
INPUT
FOR SPECIFIC SENSOR WIRING (TEMPERATURE, HUMIDITY,
PRESSURE, ETC), REFER TO THE SENSOR WIRING SECTIONS
1
M24559
BEGINNING ON PAGE 4.
M24554A
Fig. 15. Wiring for Digital Input (dry contact).
Fig. 12. Wiring for Two-stage Control – 24 Vac Input
and 24 Vac Load.
HONEYWELL MODUTROL MOTOR WITH
VOLTAGE CONTROL INPUT
HONEYWELL MODUTROL MOTOR WITH
4-20 mA MODULATING INPUT
+
C
–
T1 T2
R
F
T1 T2
–
+
1
POWER
OUTPUT
POWER
OUTPUT
B
R
–
B
R
W +
B
1
–
+
MODULATING OUTPUT
TERMINAL (MOD 1)
W
–
+
R
W
MODULATING OUTPUT
TERMINAL (MOD 1)
B
–
+
R
W
1
USE SEPARATE TRANSFORMER FOR T775 WHEN USING 24 VAC.
M24558A
USE SEPARATE TRANSFORMER FOR T775 WHEN USING 24 VAC.
M24557A
1
Fig. 16. Wiring for mod motor or direct coupled
actuator with 0-10 Vdc control input.
Fig. 13. Wiring for mod motor or direct coupled
actuator with 4 to 20 mA control input.
9
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
If any wiring changes are required, first be sure to remove
HONEYWELL ELECTRONIC
power from the controller before starting work. Pay
particular attention to verifying the power connection
(24, 120, or 240 Vac).
SERIES 90 MODUTROL MOTOR
1
T1 T2 B R W
After the controller is mounted and wired, apply power.
POWER
OUTPUT
Power Loss
The date and time settings are retained for 24 hours after
a power outage. After a power loss of more than 24 hours,
the date and time settings may need to be reentered. All
other settings are stored permanently.
2
B
R
–
3
W
+
MODULATING
B
OUTPUT
R
–
TERMINAL
Humidity, Pressure, and Universal
Sensor Calibration
W
(MOD 1)
+
A calibration parameter is available using Setup mode.
The calibration range is +/- 10% of the Min Value to Max
Value range setup for the sensor. See examples in
Table 3.
1
TO VERIFY OUTPUT, TEST OPEN CIRCUIT VOLTAGE BETWEEN
THE MOD 1 TERMINALS W AND R.
- MINIMUM (DRIVE CLOSED) SIGNAL LESS THAN 0.17 VDC
- MAXIMUM (DRIVE OPEN) SIGNAL IS GREATER THAN 1.7 VDC
2
3
USE SEPARATE TRANSFORMER FOR T775 WHEN USING 24 VAC.
Table 3. Calibration Range Examples.
INSERT 340 OHM RESISTOR (INCLUDED) ACROSS TERMINALS R AND W.
M24560A
Min.
Max.
Value
Min-Max
Range
Value
Calibration
Range
Fig. 17. Wiring for Series 90 Modutrol Motor Control.
Units Example Example Result
PSI
100
400
300
40
± 30 PSI
HONEYWELL
ELECTRONIC SERIES 90
MODUTROL MOTOR
MINIMUM POSITION
POTENTIOMETER
(Q209)
Inches
W.C.
-20.0
20.0
± 4 in. W.C.
SPDT CHANGEOVER
(H205 OR H705)
Pa or
kPa
-2,000
10
3000
100
5000 ± 500 Pa/kPa
90 ± 9%
W
R
B
T1 T2 B R W
2
%
1
POWER
OUTPUT
The calibration value is set in section “1.2.2.3.
CALIBRATE (Sensor A or B)” on page 16.
B
–
+
R
W
MODULATING OUTPUT
TERMINAL (MOD 1)
B
3
–
+
R
Temperature Sensor Calibration
W
As wire length increases, resistance increases and thus
the temperature reading increases. If necessary, calibrate
the sensor input by reducing the value by the amount
shown in the Table 4 on page 11. For example, a wire run
with 18 gauge wire of 1,000 feet, requires a calibration
offset of -6.0°F.
1
2
USE SEPARATE TRANSFORMER FOR T775 WHEN USING 24 VAC.
A 250 OHM RESISTOR PROVIDES 40% AUTHORITY WHEN
USING A 150 OHM MINIMUM POSITION POTENTIOMETER.
3
INSERT 340 OHM RESISTOR (INCLUDED) ACROSS TERMINALS R AND W.
M24561A
IMPORTANT
If the calibration value in the table exceeds the
controller’s calibration limits of +/-10°F (+/-6°C),
you must use a heavier gauge wire.
Fig. 18. Wiring for Changeover Relay and
Minimum Position Potentiometer used with
Series 90 Modutrol Motors.
For example, with a wire run of 1,000 feet you
must use 20 AWG wire or heavier in order to cal-
ibrate for wire loss within the limits of the control-
ler.
CHECKOUT
Inspect all wiring connections at the controller terminals,
and verify compliance with the installation wiring
diagrams.
See “1.2.2.3. CALIBRATE (Sensor A or B)” on page 16 for
the instructions to enter the calibration value.
NOTE: The resistance output on the temperature
sensors change at the rate of 2.2 Ohms per °F
(3.85 Ohms per °C).
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
Disconnect power supply before beginning wiring
or making wiring connections, to prevent electrical
shock or equipment damage.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
Table 4. Temperature Sensor Calibration for
HOME
RELAYS 1 2
ON
Resistance Loss due to Wire Length.
MENU AREA
Temperature Offset in
a
SENSORS
SENSOR A
°F (Feet)
AWG
Rating
mΩ/ft
2.5
200 ft
0.46
0.72
1.16
1.86
2.92
500 ft
1.14
1.82
2.90
4.64
7.32
1,000 ft
2.28
o
o
F
78
SENSOR B
84
14
16
18
20
22
F
4.0
3.64
DATA AREA
LOCK ICON
6.4
5.82
10.2
16.1
9.28
MOD1
MOD2
DI ON
40%
60%
14.64
Temperature Offset in
a
home
menu
°C (Meter)
AWG
Rating
mΩ/m
8.3
100 m
200 m
0.86
1.38
2.18
3.48
5.48
300 m
6 BUTTON KEYPAD
M24563
14
16
18
20
22
0.44
0.68
1.10
1.74
2.74
1.30
2.06
3.28
5.22
8.22
13.2
21.0
33.5
52.8
Fig. 20. LCD Display - Home Screen And Keypad.
Menu Area – On the home screen, the LCD displays the
configured relays and whether they are active. In
Program, Setup or Schedule mode, the LCD displays the
current menu selection and its order within the menu
hierarchy.
a
This is the distance from the controller to the sensor
(already accounts for round trip distance).
Fig. 19 shows how sensor resistance varies with
temperature for a sensor having a positive temperature
coefficient (PTC) of 2.1 Ohms per degree F (3.85 Ohms
per degree C).
Data Area – On the home screen, the LCD displays the
sensors and outputs status. In Setup or Program mode,
the LCD displays menu choices, parameter selections,
and data values.
Lock Icon – The icon indicates the MENU button is
locked and prevents access to the Setup and Program
menus.
RESISTANCE (OHMS)
1489
1403
1317
1231
1145
NOTE: Pressing and holding the HOME and MENU but-
tons simultaneously for five seconds locks/
unlocks the MENU button.
6-Button Keypad – The keypad is used to access the
menus and enter values (see “Using the LCD Panel
Interface”).
1059
973
887
801
1097 0.08 OHMS
AT 77°F (25°C)
1
Using the LCD Panel Interface
The 6-button keypad is used to move through the menus
and enter or change parameter values.
-40 -20
0
20 40 60 80 100 120 140 160 180 200 220
250 °F
Home Button
Pressing the HOME button at any time exits the current
Programming or Setup display screen and returns to the
home screen as shown in Fig. 20 and Fig. 21.
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90 100 110 120 °C
TEMPERATURE (DEGREES)
POSITIVE TEMPERATURE COEFFICIENT (PTC) OF 2.1 OHMS PER °F
1
M24304
Fig. 19. Sensor Resistance vs. Temperature.
Menu Button
•
Pressing the MENU button always displays the
Program menu. If you are in Setup mode, you exit
setup and return to the Program menu.
Pressing and holding the MENU button for five
seconds leaves the current screen and displays
the Setup menu.
INTERFACE OVERVIEW
•
The T775U controller uses an LCD panel and 6-button
keypad to provide status information and permit user input
of the programming, setup, and scheduling parameters.
Left and Right Arrow Buttons (W and X)
Use these buttons to move backward (W) and forward (X)
The following figure describes the display areas of the
LCD and the keypad.
through the Program and Setup menus.
11
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Up and Down Arrow Buttons (S and T)
Program, Schedule, and Summary
Use these buttons to move your selection up and down
through a menu or list.
Menus
To access these menus from the home screen, press the
MENU button. See Fig. 22.
•
When the desired item is highlighted, you press the X
arrow button to display that item’s content.
•
When a value is displayed (e.g. 70°F), the up and
down arrows increase and decrease the value.
MENU DISPLAY WHEN
SCHEDULING IS SET
MENU DISPLAY WHEN
SCHEDULING IS NOT SET
NOTE: Once you select an item from a list or enter a
value, pressing the W or X or HOME button
accepts your selection or value and stores it in
the controller’s memory.
HOME
RELAYS
ON
1
2
MENU
MENU
SENSORS
SENSOR A
PROGRAM
SCHEDULE
SUMMARY
EXIT
PROGRAM
EXIT
o
o
F
78
SENSOR B
Home Screen
84
F
In the normal run state, the LCD home screen displays
the current sensed temperatures, the modulating outputs
status, the active status of the output relays, and error and
status codes.
MOD1
MOD2
DI ON
40%
60%
When using Reset, the Heat/Cool setpoint(s) display on
the home screen for the Mod and Relay outputs; see
Fig. 21.
home
menu
OR
Active relays are indicated by the small black square ()
just below the relay number. Fig. 21 shows the home
screen with relay 2 energized.
M24565
Pressing the W and X buttons from the home screen
cycles through each modulating output that is paired with
the sensor it controls and the active output relays.
Fig. 22. Menus.
Depending on whether scheduling is enabled or not, the
LCD displays one of two menus as shown in Fig. 22.
Scheduling is enabled from the Setup menu’s Output
settings (see “1.3.3.1. USE SCHED” on page 21).
HOME
HOME
HOME
RELAYS
ON
1
2
RELAYS
ON
1
2
RELAYS
ON
1
2
SENSORS
MOD 1
40%
REL 2
ON
Setup Menu
To access the Setup menu, press and hold the MENU
button for five seconds. See Fig. 23.
SENSOR A
COOL
HEAT
o
o
F
F
SETPOINT
SETPOINT
78
o
o
o
o
F
F
F
F
SENSOR B
74
60
SENSOR A
SENSOR A
84
62
62
HOME
RT 12345 HRS
RELAYS
ON
1
2
MOD1
MOD2
DI ON
40%
60%
MOD1
MOD2
40%
60%
MOD1
MOD2
DI ON
40%
60%
SETUP
SENSORS
SENSOR A
SENSORS
OUTPUTS
EXIT
DI ON
o
o
F
78
SENSOR B
84
F
M24564
MOD1
MOD2
DI ON
40%
60%
Fig. 21. LCD Display - Home Screen Displaying
Sensors, Mod Outputs, and Active Relays.
FIVE
home
menu
NOTES:
1.
SECONDS
The modulating output home screen and the
relay home screen do not dynamically update
the active relay status, sensor values, and
modulating output percentages. The informa-
tion is a snapshot taken when you press the
W or X button to display the screen.
M24566
Fig. 23. Setup Menu.
2.
In Reset mode, the home screen displays the
effective setpoint.
Using the Menus
IMPORTANT
After four minutes of inactivity (no buttons
When you are working with the menus, use the:
pressed), the LCD display reverts to the home
screen display.
•
•
•
Left arrow button (W) to scroll backward through the
menus
Accessing the Menus
Right arrow button (X) to select the highlighted menu
item and display its content
Menus are used for programming, scheduling, viewing the
summary settings, and setup of advanced options.
Up and Down arrow buttons (S and T) to scroll up
and down through a list of items or to increase or
decrease the value of a displayed parameter
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NOTES:
1.
IMPORTANT
If you press the HOME button or there is no
1. This action sets the maximum setpoint value of
all outputs to the setpoint high limit maximum.
2. Setting the high limit setpoint maximum is irre-
versible. If you perform the action inadvertently
and this setpoint adversely affects the control of
your system, you must replace the controller.
keypad activity for four minutes, you exit
Program mode and return to the home
screen.
If you press the MENU button, you exit and
return to the menu.
2.
Programming the T775U
Controller
PROGRAMMING OVERVIEW
The controller must be programmed before being placed
into service.
To program the controller, perform the setup configuration
(see “1. Setup”) and then select one of the following
procedures depending on whether the Reset function is to
be used:
IMPORTANT
During programming, the controller is live at all
times. For example, the contacts may open and
close when adjusting the setpoint.
•
Program the Outputs for No Reset — see
“2. Programming Outputs (MOD and Relay) with No
Reset” on page 25.
•
Program the Outputs for Reset — see
“3. Programming Outputs (MOD and Relay) with
Reset” on page 28.
The Programming process uses a hierarchical menu
structure that is easy to use. You press the W and X
arrow buttons to move forward and backward through the
menus.
When programming is complete, you may continue with
“4. Scheduling” on page 33.
NOTES:
1.
The T775U controller interface is intuitive.
You may find that you do not need the follow-
ing procedure instructions to program the
controller. You may want to use this proce-
dure simply as a reference to locate the par-
ticular option or parameter of interest.
1. SETUP
Setup provides the ability to change the factory default
settings for the temperature sensors and outputs, to
enable/disable reset control, and to enable/disable
scheduling.
2.
The menus can display only those relays that
are defined in Setup (see “1.3.2. NBR OF
RELAYS” on page 21). For example, if you
configure only one relay, then only one relay
displays on the appropriate menus.
If you press the HOME button or there is no
keypad activity for four minutes, you exit Pro-
gram mode and return to the home screen.
If you press the MENU button, you exit
Program mode and return to the menu.
NOTE:
1.
The T775U controller interface is intuitive.
You may find that you do not need the follow-
ing setup instructions for the sensors and out-
puts. You may want to use this procedure
simply as a reference to locate the particular
option or parameter of interest.
3.
4.
2.
3.
If you press the HOME button or there is no
keypad activity for four minutes, you exit
Setup mode and return to the home screen.
If you press the MENU button, you exit Setup
mode and return to the menu.
Setpoint and Differential
The following describes the relationship between setpoint
and differential for heating and cooling. These settings are
programmed for each output relay.
In heating mode, reverse acting mode, and humidify
mode, the differential falls below the setpoint. The relay
de-energizes when the temperature rises to the setpoint.
As the temperature drops to the setpoint minus the
differential, the relay energizes.
Once in Setup mode, you use the —
•
•
•
Left arrow button (W) to scroll backward through the
Setup menus
Right arrow button (X) to select the highlighted menu
item and display its content
In cooling mode, direct acting mode, and dehumidify
mode, the differential falls above the setpoint. The relay
de-energizes when the temperature falls to the setpoint.
As the temperature rises to the setpoint plus the
differential, the relay energizes.
Up and Down arrow buttons (S and T) to scroll up
and down through a list of items or to increase or
decrease the value of a displayed setup parameter
Setpoint High Limit
You can set an irreversible setpoint high limit maximum
value for any single displayed setpoint value.
Adjust the setpoint (at any output) to the desired
maximum setpoint. Then, simultaneously press the
HOME, W, and X buttons and continue to press all three
buttons for five seconds to set the setpoint high limit
maximum to this value.
NOTE: You must press all three buttons at exactly the
same time for this action to occur.
13
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To change the controller’s sensors and output setup
parameters, perform the following procedures in the order
listed:
1. Enter Setup mode — see “1.1. Entering Setup
Mode”
Setup Procedure
The Setup process uses a hierarchical menu structure
that is easy to use. You press the W and X arrow buttons
to move forward and backward through the menus.
2. Setup Sensors — see “1.2. Setting up the Sensors”
3. Setup Outputs — see “1.3. Setting up the Outputs”
on page 17
4. Exit Setup Mode — see “1.4. Exiting Setup” on
page 24
NOTE: The menus can display only those relays that
are defined in Setup (see “1.3.2. NBR OF
RELAYS” on page 21). For example, if you con-
figure only two relays, then only two relays dis-
play on the appropriate menus.
1.1. Entering Setup Mode
To enter Setup mode, press and hold the MENU button
for five seconds to display the Setup menu. See Fig. 23
on page 12.
1.2. Setting up the Sensors
SETUP
SETUP
SENSORS
SENSORS
1. From the Setup menu, use the S and T buttons to
highlight SENSORS.
2. Press the X button to display the Sensors menu.
# SENSORS
SENSOR A
SENSOR B
EXIT
M24586
Fig. 24. Setup - Sensors Menu.
1.2.1. Number of SENSORS
The value entered here determines the number of
sensors displayed on the home screen.
SETUP
SENSORS
# SENSORS
SETUP
SENSORS
# SENSORS
NOTE: For applications that do not use Reset, only one
sensor (Sensor A) is available for use.
1. From the Sensors menu, highlight # SENSORS then
2
press the
X
button to display the number of sensors.
ENTER
NUMBER OF
SENSORS
2. Use the S and T buttons to enter the number of
sensors (1 or 2).
Default: 2
M24587
3. Press the X button to accept the value and display
the SENSOR A selection.
Fig. 25. Setup - Sensors - Number of Sensors.
SENSOR A
TYPE = 0-5V, 0-10V,
OR 4-20MA
SENSOR A
TYPE = PT1000
1.2.2. SENSOR A
If you are implementing two-sensor reset control, Sensor A
must always be the controlled temperature and Sensor B must
always be the controlling temperature. For example, in a reset
control based on outside temperature, Sensor A must be the
inside sensor and Sensor B must be the outside sensor.
SETUP
SENSORS
SENSOR A
SETUP
SETUP
SENSORS
SENSOR A
SENSORS
SENSOR A
TYPE
TYPE
UNITS
CALIBRATE
LABEL
EXIT
UNITS
MIN VAL
MAX VAL
CALIBRATE
LABEL
1. From the Sensors menu, highlight SENSOR A.
2. Press the X button to display the Sensor A selec-
tions.
EXIT
The menu selections change depending on whether the
sensor type is 1097Ω PTC (temperature) or 0-10V / 4-
20MA.
M24588A
Fig. 26. Setup - Sensors - Sensor A Menu.
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SETUP
SENSORS
SENSOR A
TYPE
SETUP
SENSORS
SENSOR A
TYPE
1.2.2.1. TYPE (Sensor A only)
1. From the Sensor A selections, use the S and T
buttons to highlight TYPE.
PT 1000
2. Press the X button to display the type values.
3. Use the S and T buttons to highlight the desired
value PT1000 (1097Ω PTC), 0-5V, 0-10V, or 4-
20MA.
0-5V
0-10V
4-20MA
Default: PT1000
NOTE: The default label PT1000 refers to a 1097Ω PTC
temperature sensor.
SELECT
TYPE FOR
SENSOR A
4. Press the X button to accept the units and return to
M24589A
the Sensor A selections.
5. For PT1000 (1097Ω PTC) temperature sensors, go
Fig. 27. Setup - Sensors - Sensor A - Type.
to “1.2.2.2.1. UNITS (Sensor A or B; PT1000
[1097W PTC)]”.
For 0-5V, 0-10V, and 4-20MA sensors, go to
“1.2.2.2.2. UNITS (Sensor A only; 0-5V, 0-10V, or 4-
20mA)”
SETUP
SENSORS
SENSOR A
UNITS
SETUP
SENSORS
SENSOR A
UNITS
1.2.2.2.1. UNITS (Sensor A or B; PT1000
[1097Ω PTC)]
If Sensor A is configured for °F or °C units, then the units
selection does not appear for Sensor B, since Sensor B
uses the units specified for Sensor A.
DEG F
DEG C
1. From the Sensor A selections, use the S and T
buttons to highlight UNITS.
2. Press the X button to display the temperature units.
3. Use the S and T buttons to highlight F or C.
Default: F (Fahrenheit)
SELECT
UNITS FOR
SENSOR A
4. Press the X button to accept the units and return to
M24590
the Sensor A selections.
Fig. 28. Setup - Sensors - Sensor A - Units.
Continue with “1.2.2.3. CALIBRATE (Sensor A or B)”.
SETUP
SENSORS
SENSOR A
UNITS
SETUP
SENSORS
SENSOR A
UNITS
1.2.2.2.2. UNITS (Sensor A only; 0-5V, 0-10V, or
4-20mA)
DEG F
1. From the Sensor A selections, use the S and T
buttons to highlight UNITS.
2. Press the X button to display the units list.
3. Use the S and T buttons to scroll through the list
and highlight the desired unit of measure.
You may need to scroll up or down to view all units.
Default: F (Fahrenheit)
DEG C
PSI
IN WC
% RH
PA
KPA
PPM
NONE
SELECT
UNITS FOR
SENSOR A
4. Press the X button to accept the units and return to
M24591A
the Sensor A selections.
Fig. 29. Setup - Sensors - Sensor A - Units.
15
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SETUP
SENSORS
SENSOR A
SETUP
SENSORS
SENSOR A
MIN VAL
SETUP
SENSORS
SENSOR A
MAX VAL
1.2.2.2.3. MIN or MAX VALUE (Sensor A only;
0-5V, 0-10V or 4-20mA)
MIN VAL
OR
MAX VAL
The minimum and maximum values display only for
Sensor A when its type is 0-5V, 0-10V or 4-20MA.
1. From the Sensor A selections, use the S and T
buttons to highlight MIN VAL or MAX VAL.
2. Press the X button to display the units.
3. Use the S and T buttons to increase/decrease the
desired value.
o
F
o
F
0.0
ENTER
MINIMUM
VALUE FOR
SENSOR A
0.0
ENTER
MAXIMUM
VALUE FOR
SENSOR A
Sensor Ranges:
°F
°C
PSI
-60.0 to 270.0
-51.0 to 132.0
-500 to 500
M24592A
IN WC -30.0 to 30.0
Fig. 30. Setup - Sensors - Sensor A - 0-5V, 0-10V, OR
%
0.0 to 100.0
-3000 to 3000
-3000 to 3000
0 to 9990
4-20MA - MIN and MAX Value (showing °F).
PA
KPA
PPM
NONE -9999 to 9999
4. Press the X button to accept the units and return to
the Sensor A selections.
SETUP
SENSORS
SENSOR A
CALIBRATE
SETUP
1.2.2.3. CALIBRATE (Sensor A or B)
Ensure that the wire size calibration value is within the
limits for the sensor.
SENSORS
SENSOR A
CALIBRATE
•
For temperature sensors, see “Temperature Sensor
Calibration” on page 10.
•
For other sensors, see “Humidity, Pressure, and
Universal Sensor Calibration” on page 10.
o
F
0.0
1. From the Sensor A selections, use the S and T
buttons to highlight CALIBRATE.
2. Press the X button to display the calibration value.
3. Use the S and T buttons to increase/decrease the
desired calibration value.
ENTER
VALUE TO
CALIBRATE
SENSOR A
M24594
Fig. 31. Setup - Sensors - Sensor A - Calibrate.
Default: 0.0
Sensor Range Temperature: +/-10°F (+/-6°C)
Other Sensor Range: +/-10% of the Min to Max
values specified previously. See Table 3 on
page 10 for examples.
4. Press the X button to accept the value and return to
the Sensor A selections.
SETUP
SETUP
SENSORS
1.2.2.4. LABEL (Sensor A or B input)
SENSORS
SENSOR
A
SENSOR
LABEL
A
For a sensor already labeled, the display positions to and
highlights that label.
LABEL
SENSOR
BOILER A
A
1. From the Sensor A selections, use the S and T
buttons to highlight LABEL.
2. Press the X button to display the label list.
3. Use the S and T buttons to scroll through the list
and highlight the desired label.
OUTDOOR A
DUCT A
DISCHRG A
CHILLER A
ROOM A
You may need to scroll up or down to view all possi-
ble labels.
4. Use the X button to accept the highlighted label
SELECT
LABEL FOR
SENSOR
A
M24595
and exit the list.
Fig. 32. Setup - Sensors - Sensor A - Label.
NOTE: The label names in list order are: Sensor, Boiler,
Outdoor, Duct, Dischrg, Chiller, Room, Supply,
Return, and Animals.
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1.2.2.5. Exit Sensor A Setup
Press the W button to exit Sensor A selections and return
SETUP
SENSORS
SENSOR A
to the Sensors menu.
UNITS
or
CALIBRATE
LABEL
Use the S and T buttons to highlight EXIT and press the
EXIT
X button.
Continue with “1.2.3. SENSOR B (Temperature only)”
M24596
Fig. 33. Setup - Sensors - Sensor A - Exit.
1.2.3. SENSOR B (Temperature only)
SETUP
SENSORS
SETUP
For two-sensor reset control, Sensor B must always be
the controlling temperature. For example, in a reset
control based on outside temperature, Sensor B must be
the outside sensor.
SENSORS
# SENSORS
SENSOR A
SENSOR B
EXIT
NOTE: Sensor B is available only for reset on the
T775U2006, but can be controlled just like Sen-
sor A on the T775U2016.
1. From the Sensors menu, use the T button to high-
light SENSOR B.
M24597
2. Press the X button to display the Sensor B menu.
3. Repeat the selections described in “1.2.2. SENSOR
A” through “1.2.2.4. LABEL (Sensor A or B input)”
beginning on page 14, but perform only those steps
applicable to Sensor B.
Fig. 34. Setup - Sensors - Sensor B Menu.
4. Press the W button to exit SENSOR B and return to
the Sensors menu.
or
Use the S and T buttons to highlight EXIT and
press the X button.
5. Press the W button to exit the Sensors menu and
return to the Setup menu.
Continue with “1.3. Setting up the Outputs”.
SETUP
OUTPUTS
MOD 1
SETUP
OUTPUTS
MOD 1
1.3. Setting up the Outputs
1. From the Setup menu, use the Sand T buttons to
highlight OUTPUTS.
2. Press the X button to display the Outputs menu.
TYPE
MIN OUT %
INTEGRAL
DERIVATIV
SCHEDULE
RESET
NOTE: The menus (e.g. the Outputs menu shown here)
can display only those relays that are defined in
Setup (see page 21). For example, if you config-
ure only two relays, then only two relays display
on the appropriate menus.
HIDE
EXIT
M24599A
The following procedures set up each modulating output
and relay output.
Fig. 35. Setup - Outputs Menu.
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SETUP
OUTPUTS
MOD 1
SETUP
OUTPUTS
MOD 1
1.3.1. Setting up the Modulating Outputs
1. From the Output menu, use the S and T buttons to
highlight the desired modulating output (MOD 1 or
MOD 2).
TYPE
MIN OUT %
INTEGRAL
DERIVATIV
SCHEDULE
RESET
2. Press the X button to display the selected MOD
menu.
EXIT
Use the remaining procedures, beginning with “1.3.1.1.
TYPE (of output signal)”, to set up each modulating
output. If you have two modulating outputs, repeat these
procedures for each modulating output.
M24599
Fig. 36. Setup - Outputs - Modulating Output Menu.
SETUP
OUTPUTS
MOD 1
TYPE
SETUP
OUTPUTS
MOD 1
1.3.1.1. TYPE (of output signal)
TYPE
1. From the Mod menu, use the S and T buttons to
highlight TYPE.
2. Press the X button to display the Type selections.
3. Use the Sand T buttons to highlight the desired
output type.
4 - 20 mA
0-10 V
2-10 V
SERIES 90
Default: 4-20 mA
4. Press the X button to accept the selected type and
return to the Mod menu.
SELECT
TYPE FOR
MOD 1
M24600
Fig. 37. Setup - Outputs - Mod Out - Type.
SETUP
OUTPUTS
MOD 1
MIN OUT %
SETUP
OUTPUTS
MOD 1
1.3.1.2. MIN OUT %
The minimum output % prevents the output from dropping
below the value entered. This value can be useful to
maintain minimum damper position.
MIN OUT %
Using the time clock or digital input to disable the output
forces the output to 0%.
%
0
1. From the Mod menu, use the S and T buttons to
highlight MIN OUT %.
2. Press the X button to display the Min Out %.
3. Use the S and T buttons to increase/decrease the
desired value from 0% to 100% in 1% increments.
Default: 0%
ENTER
MINIMUM
PERCENT FOR
MOD 1
M24601
Fig. 38. Setup - Outputs - Mod Out - Minimum Output
Percentage.
Range: 0 to 100%
4. Press the X button to accept the percentage and
return to the Mod menu.
SETUP
OUTPUTS
MOD 1
INTEGRAL
SETUP
OUTPUTS
MOD 1
1.3.1.3. INTEGRAL
INTEGRAL
1. From the Mod menu, use the S and T buttons to
highlight INTEGRAL.
2. Press the X button to display the Integral seconds.
3. Use the S and T buttons to increase/decrease the
value from 0 to 3,600 in 10 second increments.
Default: 400 seconds
SEC
400
Range: 0 to 3,600 seconds
ENTER
INTEGRAL
TIME FOR
MOD 1
4. Press the X button to accept the seconds and
return to the Mod menu.
M24602
See the Notes on page 19 for Integral timing information.
Fig. 39. Setup - Outputs - Mod Out - Integral.
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NOTES: (Integral Timing)
1. The Integral time is factory set for 400 seconds. This
is a good middle range and should satisfy many
applications. The integral time can be increased for
applications where sensed response is slow, and can
be decreased for applications where sensed
the offset from setpoint during steady state control
that is often seen in proportional only control.
3. Keep in mind that control is most sensitive to
throttling range. Adjust the throttling range first
before any adjustment to integral time. Adjust
throttling range to be as wide as possible to start
since this will provide the most stable control.
Remember that the integral will eliminate the steady
state error so you do not need to have a small
throttling range to have accurate control. (Integral
action allows for controlling to a setpoint even with a
wide throttling range).
response is fast (e.g. discharge air control).
2. As a starting point, an optimal integral time for
discharge air typically ranges from 12 to 200
seconds. An optimal integral time for room control
typically ranges from 60 to 2,500 seconds. The
purpose of integral action is to reduce or eliminate
SETUP
OUTPUTS
MOD 1
DERIVATIV
SETUP
OUTPUTS
MOD 1
1.3.1.4. DERIVATIVE
The Derivative default value is factory set to zero (no
derivative control). It is strongly recommended that the
derivative remain at zero (0) unless you have a very good
reason to adjust it. Derivative control is not needed in the
vast majority of HVAC applications.
DERIVATIV
SEC
0
ENTER
1. From the Mod menu, use the S and T buttons to
highlight DERIVATIV.
2. Press the X button to display the Derivative sec-
DERIVATIVE
TIME FOR
MOD 1
onds.
3. Use the S and T buttons to increase/decrease the
value.
M24603
Fig. 40. Setup - Outputs - Mod Out - Derivative.
Default: 0 (zero)
Range: 0 to 3,600 seconds
4. Press the X button to accept the seconds and
return to the Mod menu.
SETUP
OUTPUTS
MOD 1
SCHEDULE
SETUP
OUTPUTS
MOD 1
1.3.1.5. SCHEDULE
The Schedule option displays only if the USE SCHED
parameter is set to Yes (see page 21).
1. From the Mod menu, use the S and T buttons to
highlight SCHEDULE.
SCHEDULE
YES
NO
2. Use the S and T buttons to highlight YES or NO.
Default: YES
3. Press the X button to accept the selection and
return to the Mod menu.
USE
SCHEDULE
FOR
Each output can be set up to follow or ignore the built in
scheduler. To disable the scheduler for all outputs, see
“1.3.3.1. USE SCHED” on page 21.
OUTPUTS
M24604
Fig. 41. Setup - Outputs - Mod Out - Schedule.
19
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SETUP
SETUP
OUTPUTS
1.3.1.6. RESET
OUTPUTS
MOD 1
MOD 1
RESET
This selection enables the controller’s Reset function, and
allows each output to be individually programmed for
Reset or No Reset.
RESET
YES-BOILER
YES-OTHER
NO
IMPORTANT
To use the Reset function of the controller, the
first modulating output (MOD1) must be set for
Reset here.
USE
RESET
FOR
The RESET choice is offered for all outputs in setup
mode, and you can set any or all of them for Reset=YES
or Reset=NO. The default is Reset=NO.
MOD1
M24605
Fig. 42. Setup - Outputs - Mod Out - Reset.
For the remaining outputs, if Reset=YES, then these
outputs use the reset curve programmed for the first
output.
1. From the Mod menu, use the S and T buttons to
highlight RESET.
2. Use the S and T buttons to highlight the desired
value.
Default: NO
3. Press the X button to accept the selection and
return to the Mod menu.
SETUP
OUTPUTS
MOD 1
HIDE
SETUP
OUTPUTS
MOD 1
1.3.1.7. Hide
The Hide option is used to prevent the MOD 1 and MOD 2
outputs from displaying on the Home screen.
HIDE
YES
NO
1. From the Mod menu, use the S and T buttons to
highlight HIDE.
2. Use the S and T buttons to highlight YES or NO.
Default: YES
3. Press the X button to accept the selection and
return to the MOD menu.
HIDE MOD 1 ON
HOME SCREEN
NOTE: The MOD1 and MOD2 outputs are still active
even when hidden from the Home screen.
M28656
Fig. 43. Setup - Outputs - Mod 1/2- Hide.
1.3.1.7. Exit Modulating Outputs Setup
Press the W button (or highlight EXIT and press the X
button) to exit the Mod menu and return to the Outputs
menu.
SETUP
OUTPUTS
MOD 1
TYPE
MIN OUT %
INTEGRAL
DERIVATIV
SCHEDULE
EXIT
To configure the second modulating output, go to “1.3.1.
Setting up the Modulating Outputs” on page 18.
When you finish setting up the two modulating outputs,
continue with “1.3.2. NBR OF RELAYS”.
M24606
Fig. 44. Setup - Outputs - Mod Out - Exit.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
SETUP
OUTPUTS
# RELAYS
1.3.2. NBR OF RELAYS
SETUP
OUTPUTS
# RELAYS
1. From the Outputs menu, use the Sand T buttons
to highlight # RELAYS.
2. Press the X button to display the number of relays.
3. Use the S and T buttons to display the number
from 1 to 2.
4. Press the X button to accept the value and display
2
the Outputs menu.
ENTER
NUMBER OF
RELAYS
The number of relay outputs entered here determines
how many relays display on the home screen.
M24607
Fig. 45. Setup - Outputs - Number of Relays.
SETUP
SETUP
1.3.3. OPTIONS
OUTPUTS
OPTIONS
OUTPUTS
OPTIONS
1. From the Outputs menu, use the Sand T buttons
to highlight OPTIONS.
2. Press the X button to display the Options menu.
USE SCHED
MIN OFF
MIN ON
DI OPTS
SHOW RT
EXIT
M24608A
Fig. 46. Setup - Outputs - Options Menu.
SETUP
OUTPUTS
OPTIONS
USE SCHED
SETUP
OUTPUTS
OPTIONS
USE SCHED
1.3.3.1. USE SCHED
1. Press the
X
button to display the schedule selections.
2. Use the Sand T buttons to highlight YES or NO.
YES
NO
Default: NO
3. Press the X button to accept the value and display
the MIN OFF option.
Selecting NO disables scheduling for all outputs.
USE
SCHEDULE
FOR
Selecting YES enables scheduling for all outputs. When
YES is selected, all individual outputs default to follow the
schedule. However, each individual output can be
removed from scheduling as desired.
OUTPUTS
M24609
Fig. 47. Setup - Outputs - Options - Schedule.
With Scheduling enabled, when you return to Program
mode, the new option for Scheduling displays. You can
press the HOME button and then the MENU button to
view the Schedule options in the menu.
See “1.3.1.5. SCHEDULE” on page 19.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
SETUP
OUTPUTS
OPTIONS
MIN OFF
SETUP
OUTPUTS
OPTIONS
MIN OFF
SETUP
OUTPUTS
OPTIONS
MIN ON
1.3.3.2. MIN OFF or MIN ON
This is the minimum number of seconds of “off time” or
“on time” for all relays.
OR
MIN ON
1. Press the X button to display the Min Off/On value.
2. Use the S and T buttons to increase/decrease the
desired number of seconds from 0 to 990 seconds
in 10 second increments.
Default: 0 (zero)
Range: 0 to 990 seconds
3. Press the X button to accept the seconds and
SEC
SEC
0
0
ENTER
MINIMUM
OFF TIME
ENTER
MINIMUM
ON TIME
FOR RELAYS
FOR RELAYS
display the DI OPTIONS.
M24610A
NOTES:
Fig. 48. Setup - Outputs - Options - Min Off/On Time.
1.
The minimum off time applies to all relay
outputs.
2.
When minimum off time is active, relays
waiting to be energized display a flashing
square underneath the relay number on the
home screen.
3.
If the minimum off time is not equal to zero
(0), the minimum off time activates at power-
up. To manually override, press the W button
at any time.
SETUP
SETUP
OUTPUTS
1.3.3.3. DI OPTIONS (digital input options)
OUTPUTS
OPTIONS
OPTIONS
DI OPTS
The DI Option you select applies to all outputs. This
option overrides any Setpoint/Setback values entered in
the Schedule.
DI OPTS
DISABLE
SETPOINT
SETBACK
ENABLE
1. Press the X button to display the DI Option selec-
tions.
IGNORE
2. Use the S and T buttons to highlight DISABLE,
SETBACK, or IGNORE.
Default: DISABLE
3. Press the X button to accept the value and display
SELECT DI
OPTIONS
FOR
OUTPUTS
M24611A
the SHOW RT option.
When the digital input (DI) closes, all outputs follow the DI
option value (Disable, Setback, or Ignore):
Fig. 49. Setup - Outputs - Options - DI Options.
•
•
•
DISABLE disables the outputs; relays return to de-
energized state and Mod outputs return to 0% output.
SETPOINT forces the control to the setpoint
temperature.
SETBACK enables a setback temperature value to be
programmed for each output.
—
To program the Setback temperature with Reset,
see Fig. 73 on page 31.
—
To program the Setback temperature without
Reset, see Fig. 60 on page 26.
•
•
ENABLE energizes all relays to 100%. Use this option
carefully.
IGNORE causes the digital input to have no effect on
the Relay or Mod outputs.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
SETUP
OUTPUTS
OPTIONS
SHOW RT
SETUP
1.3.3.4. SHOW RT (show run time hours)
OUTPUTS
OPTIONS
SHOW RT
1. Press the X button to display the Show RT values.
2. Use the S and T buttons to select YES or NO.
Default: YES
YES
NO
3. Press the X button to accept the value and return to
the Options menu.
Selecting YES shows the RT (run time) hours for each
relay on the home screen displays.
USE
RUNTIME
FOR
NOTE: Run times can be reset to zero for each individ-
RELAYS
M24612
ual relay. You must do this for each relay that
you want to reset to zero. See “1.3.4.3. RESET
RT (run time)” on page 24.
Fig. 50. Setup - Outputs - Options - Show Runtime.
SETUP
OUTPUTS
OPTIONS
1.3.3.5. Exit Options Setup
Press the W button to exit the Options set up and return to
the Outputs menu.
USE SCHED
MIN OFF
DI OPTION
SHOW RT
EXIT
or
Use the S and T buttons to highlight EXIT and press the
X button.
Continue with “1.3.4. Setting up the Relays”.
M24613
Fig. 51. Setup - Outputs - Options - Exit.
SETUP
SETUP
1.3.4. Setting up the Relays
OUTPUTS
RELAY 1
OUTPUTS
RELAY 1
1. From the Outputs menu, use the S and T buttons
to highlight the desired relay (1 or 2).
2. Press the X button to display the selected Relay
menu.
SCHEDULE
RESET
RESET RT
EXIT
Continue with the remainder of this section to setup the
relay outputs.
M24614
Fig. 52. Setup - Outputs - Relay Menu.
SETUP
OUTPUTS
RELAY 1
SCHEDULE
SETUP
OUTPUTS
RELAY 1
1.3.4.1. SCHEDULE
This selection displays only if “Use Sched = YES” is
selected during the Output Options setup (see page 21).
When selected, individual outputs default to follow the
schedule.
SCHEDULE
YES
NO
1. Press the X button to display the Schedule values.
2. Use the S and T buttons to select YES or NO.
Default: YES
USE
SCHEDULE
FOR
3. Press the X button to accept the value and return to
the Relay menu.
An individual output can be selected to be controlled or
not controlled by the schedule.
OUTPUTS
M24615
Fig. 53. Setup - Outputs - Relay - Schedule.
If NO is selected, the Setback selection does not appear
in the Program menu for this output.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
SETUP
SETUP
OUTPUTS
1.3.4.2. RESET
OUTPUTS
RELAY 1
RESET
RELAY 1
RESET
IMPORTANT
For relays to use the Reset function of the con-
YES
NO
troller, both modulating outputs (MOD 1 and
MOD 2) must be set for Reset.
Relays that have Reset set to YES use the reset curve
configured for MOD 1.
USE
RESET
FOR
1. Press the X button to display the Reset values.
2. Use the S and T buttons to select YES or NO.
Default: NO
RELAY 1
M24616
Fig. 54. Setup - Outputs - Relay - Reset.
3. Press the X button to accept the value and return to
the Relay menu.
•
•
If you select YES, then all other outputs display this
Setup option and will use the reset curve programmed
for the first output.
If you select NO, then No Reset is configured for that
output and all other subsequent outputs.
SETUP
SETUP
OUTPUTS
1.3.4.3. RESET RT (run time)
OUTPUTS
RELAY 1
RELAY 1
RESET RT
This selection displays only if “Show RT = YES” is
selected during Output Options setup (see page 23).
RESET RT
YES
NO
1. Press the X button to display the Reset RT values.
2. Use the S and T buttons to select YES or NO.
Default: NO
3. Press the X button to accept the value and return to
the Relay menu.
RESET
RUN TIME
FOR
Selecting YES immediately resets the output run time
hours to zero for this output. When you subsequently
return to this screen, the RESET RT defaults to NO.
RELAY 1
M24617
Fig. 55. Setup - Outputs - Relay - Reset Runtime.
NOTE: Run times can be reset to zero for each individ-
ual relay. You must do this for each relay that
you want to reset to zero.
1.3.4.4. EXIT Relay Setup
Press the W button to exit the selected relay set up and
SETUP
OUTPUTS
RELAY 1
return to the Outputs menu.
RESET
SCHEDULE
RESET RT
EXIT
To setup the next relay output go to “1.3.4. Setting up the
Relays” on page 23.
When you finish setting up the relay outputs, continue
with “1.4. Exiting Setup”.
M24618
Fig. 56. Setup - Outputs - Relay - Exit.
1.4. Exiting Setup
Press the HOME button to exit Setup mode and return to
the home screen display.
or
Use the S and T buttons to highlight EXIT from the menu
and press the X button.
This completes the Setup procedure.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
NOTE: For applications where Reset is not used, only
2. PROGRAMMING OUTPUTS
one sensor (Sensor A) is available for use.
(MOD AND RELAY) WITH NO
RESET
The T775U can be programmed for Reset or No Reset.
From the factory, the T775U is programmed for No Reset.
This section describes the steps necessary to program
the controller for No Reset.
2.1. Entering Program Mode
MENU
PROGRAM
Press the MENU button, then select PROGRAM and
MENU
press the X button to view the Program menu.
PROGRAM
MOD 1
MOD 2
RELAY 1
RELAY 2
EXIT
M24567
Fig. 57. Program Menu.
2.1.1. Program Menu for Outputs with
No Reset
MENU
PROGRAM
MOD 1
PROGRAM
MOD 1
From the Program menu, select MOD 1, MOD 2,
RELAY 1, or RELAY 2 to view the parameters. This
section illustrates the screens for selecting MOD 1, but
other than as noted below, the programming is the same
for each output.
SETPOINT
SETBACK
SENSOR
THROT RNG
ACTION
EXIT
NOTE: For Relays, DIFFRNTL replaces THROT RNG.
NOTE: The Setback parameter displays only if schedul-
ing is enabled (see Fig. 47 on page 21) or the DI
Option is set to Setback. (see Fig. 49 on
page 22).
M24580A
Fig. 58. Program Menu - No Reset.
Continue with “2.1.2. SETPOINT”.
MENU
PROGRAM
PROGRAM
2.1.2. SETPOINT
MOD 1
SETPOINT
MOD 1
SETPOINT
1. From the menu, use the S and T buttons to high-
light SETPOINT.
2. Press the X button to display the setpoint value.
3. Use the S and T buttons to increase/decrease the
desired setpoint temperature.
o
F
Default: 70°F (21°C)
70
Range: -40°F to 248°F (-40°C to 120°C)
4. Press the X button to accept the setpoint tempera-
ture and display the next option.
ENTER
SETPOINT
FOR
MOD 1
M24581
Fig. 59. Program - Setpoint.
25
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MENU
PROGRAM
MOD 1
SETBACK
2.1.3. SETBACK
The Setback temperature option displays only if
scheduling is enabled (see Fig. 47 on page 21) or the DI
Option is set to Setback. (see Fig. 49 on page 22).
PROGRAM
MOD 1
SETBACK
This is the desired setpoint temperature that you want to
use during setback mode for this output. For example, if
your setpoint is 70°F and you want the temperature to
drop 10°F during setback mode, enter 60°F as the set-
point for this output.
o
F
60
ENTER
SETBACK
SETPOINT
FOR MOD 1
1. From the menu, use the S and T buttons to high-
light SETBACK.
M24584
2. Use the S and T buttons to increase/decrease the
Fig. 60. Program - Setback.
desired setpoint temperature.
Default: 60°F (16°C)
Range: -40°F to 248°F (-40°C to 120°C)
3. Press the X button to accept the value and display
the menu.
MENU
2.1.3. SENSOR
PROGRAM
MOD 1
SENSOR
PROGRAM
MOD 1
This sub-menu choice is only available on the T775U2016
model.
SENSOR
SENSOR A
SENSOR B
1. From the menu, use the S and T buttons to high-
light SENSOR A or SENSOR B.
2. Press the X button to accept the sensor selection
and display the next option.
SELECT
SENSOR
FOR
MOD 1
M28660
Fig. 61. Program - Sensor.
MENU
PROGRAM
MOD1
2.1.5. THROTTLING RANGE or
DIFFERENTIAL
PROGRAM
MOD 1
THROT RNG
THROT RNG
Throttling Range displays for Modulating outputs.
Differential is used for the Relay outputs.
1. From the menu, use the S and T buttons to high-
light THROT RNG or DIFFERNTL.
2. Press the X button to display the throttling range
value.
o
F
20
ENTER
THROTLLING
RANGE FOR
MOD 1
3. Use the S and T buttons to increase/decrease the
desired value.
Default: 20°F (-6.6°C)
M24582
Range: 1°F to 150°F (1°C to 66°C)
4. Press the X button to accept the value and display
the next option.
Fig. 62. Program - Throttling Range or Differential.
The Throttling Range brackets the setpoint setting, e.g., if
the setpoint is 72°F and the throttling range is 10°F, then
the effective throttling temperature range is 67°F to 77°F.
In heating mode, the Differential is below the setpoint.
The relay de-energizes when the temperature rises to the
setpoint. As the temperature drops to the setpoint minus
the Differential, the relay energizes.
In cooling mode, the Differential is above the setpoint.
The relay de-energizes when the temperature falls to the
setpoint. As the temperature rises to the setpoint plus the
Differential, the relay energizes.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MENU
PROGRAM
MOD 1
2.1.6. ACTION
PROGRAM
MOD 1
ACTION
ACTION
1. From the menu, use the S and T buttons to high-
light ACTION.
HEAT
COOL
Default: HEAT
REV ACT
DIR ACT
HUMID
2. Press the X button to display the action selections.
3. Use the S and T buttons to select the desired
value.
DEHUMID
4. Press the X button to accept the highlighted selec-
SELECT
tion and display the next option.
ACTION
FOR
MOD 1
M24583
Fig. 63. Program - Action.
2.2. Program Next Output (Modulating
Output or Relay)
For the next output, select the desired MOD or Relay from
the Program menu (see Fig. 57 on page 25).
Go to “2.1.2. SETPOINT” on page 25 to continue
programming.
When you finish programming the outputs, continue with
“1.3. Exit Programming without Reset”.
1.3. Exit Programming without Reset
Press the HOME button to leave programming mode and
return to the home screen.
This completes the programming procedure for
controllers that do not use Reset.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
NOTE: Even if the MOD outputs are not used, both
3. PROGRAMMING OUTPUTS
(MOD AND RELAY) WITH
RESET
MOD 1 and MOD 2 must be set to Reset in order
to configure Reset for the relay(s).
The reset curve established when programming the first
output (MOD 1) is then used for all subsequent outputs
that are configured for Reset, and each of those outputs
will be offset from this curve.
The T775U can be programmed for Reset or No Reset for
each output. From the factory, the T775U is programmed
for No Reset. This section describes the steps necessary
to program the controller for Reset.
For all outputs that will follow a reset curve, be sure to
configure for Reset=YES in the setup mode. Choose
Reset YES or NO for all other outputs you wish to reset,
then press the HOME button to record your selection.
To use the Reset feature, the first output (MOD 1) must be
set to Reset=YES in Setup mode (see “3.1. Setting Up the
Controller for Reset”).
SETUP
OUTPUTS
MOD 1
RESET
SETUP
NOTE: The first output, Mod 1, must be set for Reset to
enable the controller’s Reset function.
OUTPUTS
MOD 1
RESET
YES-BOILER
YES-OTHER
NO
3.1. Setting Up the Controller for Reset
1. Press and hold the MENU button for five seconds to
enter Setup mode.
2. Then choose:
OUTPUTS X
MOD1 X
RESET X
USE RESET
FOR
MOD 1
then select YES-BOILER or YES-OTHER (Fig. 64).
M24568
You can now press the HOME button to exit Setup mode
and continue with “Determining and Setting the Reset
Values”.
Fig. 64. Reset Setup.
•
With the above settings example, when the outdoor
temperature is 50°F, the effective setback setpoint is
170°F (180°F setpoint minus the 10°F setback).
Determining and Setting the Reset
Values
NOTE: A single reset curve is programmed for the
MOD 1 output and is used by all outputs setup
with RESET=YES.
NOTE: When using the Reset feature, Sensor A must
be sensing the controlled temperature (e.g.
Boiler), Sensor B must be sensing the resetting
temperature (e.g. outdoor temp).
To program an output for Reset, refer to the values as
shown in the examples below. Choose your own
appropriate values for Sensor A maximum and minimum
and Sensor B maximum and minimum.
CAUTION
If using the time clock or DI to go to setback,
the T775P will shift the reset curve up or down
and cause the controlled setpoint to exceed
either the entered reset max. temp or min.
temp (dropping below reset minimum is most
common, since setback is normally below
setpoint). If this is not desired, either do not
use setback, or adjust the min. and max.
values entered so that critical setpoints are
not exceeded in the setback mode.
Reset Example: (see Fig. 65)
•
•
•
•
Sensor A is the boiler sensor and Sensor B is the
outdoor sensor.
Maximum boiler temperature desired is 210°F when
the outdoor temperature is 20°F.
Minimum boiler temperature desired is 160°F when the
outdoor temperature is 70°F.
With the above settings example, when the outdoor
temperature is 50°F, the effective setpoint is 180°F.
When Reset is programmed, the home screen displays
the calculated Heat/Cool setpoint(s) for the Mod and
Relay outputs based on the reset curve. See Fig. 21 on
page 12.
Setback (optional) Example: (see Fig. 65)
•
Setback of -10°F is used to drop the temperature at
night by 10°F.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
NOTE: For MOD 2 and the Relays, a setpoint offset is
used. See “3.3.1. SETPOINT OFFSET (MOD 2
only)” on page 32.
°F
220
SP MAX A1
The remainder of this section beginning with “3.2.
Program Menus for Outputs with Reset” on page 29
describes the individual parameters for configuring
outputs with Reset.
(BOILER MAX)
210
200
190
180
170
160
150
140
S
E
N
S
O
R
For your reference, the following Reset programming
procedure uses the values in Fig. 65 above.
A
SETBACK
OFFSET
-10°F
SP MIN A2
(BOILER MIN)
10
30 40 50 60
80 °F
20
70
RESET B1
(OUTSD MIN)
RESET B2
(OUTSD MAX)
SENSOR B
Fig. 65. Reset Curve for MOD 1 with Setback Offset.
M24570
MOD 1 RESET:
YES-OTHER AND
MOD 1 RESET:
YES-BOILER AND
3.2. Program Menus for Outputs with
Reset
DI OPTION = SETBACK
DI OPTION = SETBACK
Press the MENU button, select PROGRAM, then highlight
MENU
PROGRAM
MOD 1
MENU
PROGRAM
MOD 1
MOD 1 and press the X button to view the parameters.
PROGRAM
MOD 1
OR
The Reset curve settings (Fig. 67 through Fig. 70) are
programmed for the first output (MOD 1) and these
settings apply to all outputs that are configured for Reset.
See Fig. 65 for the reset curve values used in the
following section.
SP MAX A1
RESET B1
SP MIN A2
RESET B2
THROT RNG
ACTION
BOILR MAX
OUTSD MIN
BOILR MIN
OUTSD MAX
THROT RNG
ACTION
SETBACK
EXIT
SETBACK
EXIT
NOTE: The Setback parameter displays only if schedul-
ing is enabled (see Fig. 47 on page 21) or the DI
Option is set to Setback (see Fig. 49 on
page 22).
M24571
Fig. 66. Setpoint Values for Reset and Setback.
MENU
3.2.1. SP MAX A1 or BOILER MAX
PROGRAM
MOD 1
SP MAX A1
PROGRAM
MOD 1
(Setpoint maximum for Sensor A)
SP MAX A1
1. From the menu, use the S and T buttons to high-
light BOILER MAX or SP MAX A1.
2. Press the X button to display the maximum setpoint
value.
210 o
ENTER
MAXIMUM
SETPOINT FOR
SENSOR A
F
3. Use the S and T buttons to increase/decrease the
desired maximum setpoint temperature.
Default: 180°F (82°C)
Range: -40°F to 248°F (-40°C to 120°C)
4. Press the X button to accept the setpoint tempera-
ture and display the next option.
M24572
Fig. 67. Program - Sensor A Max. Setpoint.
MENU
PROGRAM
PROGRAM
3.2.2. RESET B1 or OUTSD MIN
MOD 1
RESET B1
MOD 1
RESET B1
(Sensor B value when at SP MAX A1 Setpoint)
1. From the menu, use the S and T buttons to high-
light RESET B1 or OUTSD MIN.
2. Press the X button to display the setpoint value.
3. Use the S and T buttons to increase/decrease the
desired setpoint temperature.
o
F
20
Default: 10°F (-12°C)
Range: -40°F to 248°F (-40°C to 120°C)
4. Press the X button to accept the value and display
the next option.
ENTER
SENSOR B VALUE
FOR MAXIMUM
SETPOINT
M24573
Fig. 68. Program -Sensor B Max. Setpoint.
29
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MENU
PROGRAM
MOD 1
SP MIN A2
3.2.3. SP MIN A2 or BOILER MIN
PROGRAM
MOD 1
(Setpoint minimum for Sensor A)
SP MIN A2
1. From the menu, use the S and T buttons to high-
light BOILER MIN or SP MIN A2.
2. Press the X button to display the setpoint value.
3. Use the S and T buttons to increase/decrease the
desired minimum setpoint temperature.
Default: 140°F (60°C)
Range: -40°F to 248°F (-40°C to 120°C)
4. Press the X button to accept the setpoint tempera-
ture and display the next option.
160 o
ENTER
MINIMUM
SETPOINT FOR
SENSOR A
F
M24574
Fig. 69. Program - Sensor A Min. Setpoint.
MENU
3.2.4. RESET B2 or OUTSD MAX
PROGRAM
MOD 1
RESET B2
PROGRAM
MOD 1
(Sensor B value when at MIN A2 Setpoint)
RESET B2
1. From the menu, use the S and T buttons to high-
light RESET B2.
2. Press the X button to display the setpoint value.
3. Use the S and T buttons to increase/decrease the
desired setpoint temperature.
o
F
70
Default: 60°F (16°C)
ENTER
Range: -40°F to 248°F (-40°C to 120°C)
4. Press the X button to accept the value and display
the next option.
SENSOR B VALUE
FOR MINIMUM
SETPOINT
M24575
Fig. 70. Program - Sensor B Min. Setpoint.
MENU
PROGRAM
PROGRAM
3.2.5. THROTTLING RANGE or
DIFFERENTIAL
MOD 1
MOD
1
THROT RNG
THROT RNG
Throttling Range displays for Modulating outputs.
Differential is used for the Relay outputs.
1. From the menu, use the S and T buttons to high-
light THROT RNG or DIFFERNTL.
2. Press the X button to display the throttling range
value.
o
F
20
ENTER
THROTTLING
RANGE FOR
FOR MOD 1
3. Use the S and T buttons to increase/decrease the
desired value.
Default: 20°F (-6.6°C)
M24577
Range: 1°F to 150°F (1°C to 66°C)
4. Press the X button to accept the value and display
the next option.
Fig. 71. Program - Throttling Range or Differential.
The Throttling Range brackets the setpoint setting, e.g., if
the setpoint is 72°F and the throttling range is 10°F, then
the effective throttling temperature range is 67°F to 77°F.
In heating mode, the Differential is below the setpoint.
The relay de-energizes when the temperature rises to the
setpoint. As the temperature drops to the setpoint minus
the Differential, the relay energizes.
In cooling mode, the Differential is above the setpoint.
The relay de-energizes when the temperature falls to the
setpoint. As the temperature rises to the setpoint plus the
Differential, the relay energizes.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MENU
PROGRAM
RELAY 1
ACTION
3.2.6. ACTION
PROGRAM
RELAY 1
ACTION
For the MOD 1 output (and for outputs with RESET=NO),
the ACTION selection displays.
HEAT
COOL
For all other outputs with RESET=YES, the ACTION
selection does not display; continue with “3.2.7.
SETBACK OFFSET (if configured)” on page 31.
REV ACT
DIR ACT
HUMID
DEHUMID
1. From the menu, use the S and T buttons to high-
light ACTION.
Default: HEAT
2. Press the X button to display the action selections.
SELECT
ACTION
FOR
RELAY 1
M24578
3. Use the S and T buttons to select the desired
value.
Fig. 72. Program - Action Selection.
4. Press the X button to accept the highlighted selec-
tion and display the next option.
MENU
PROGRAM
PROGRAM
3.2.7. SETBACK OFFSET (if configured)
The Setback temperature option displays only if
scheduling is enabled (see Fig. 47 on page 21) or the DI
Option is set to Setback. (see Fig. 49 on page 22).
RELAY 1
SETBACK
RELAY 1
SETBACK
This value is the number of degrees plus (+) or minus (-)
that you want the temperature to be offset from the
setpoint.
o
F
-10
ENTER
SETBACK
SETPOINT
FOR RELAY 1
For example, If you want the temperature to be 10°F less
than the setpoint during setback mode, enter -10°F. In
normal operations for heating, the offset will be negative.
For cooling, the offset will be a positive value.
M24579
Fig. 73. Program - Setback (Offset).
1. From the menu, use the S and T buttons to high-
light SETBACK.
2. Use the S and T buttons to increase/decrease the
desired setpoint temperature.
Default: 0°F
Range: -150°F to 150°F (-101°C to 66°C)
3. Press the X button to accept the value and display
the menu.
This completes the programming of the MOD 1 output.
To program the second Modulating output and the two
relays, continue with “3.3. Second Modulating Output and
Relays”.
31
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MENU
3.3. Second Modulating Output and
Relays
MENU
PROGRAM
MOD 2
PROGRAM
MOD 2
PROGRAM
MOD 2
OFFSET
For the second Modulating Output and the two Relays (if
they are configured for Reset), the Offset parameter
displays on the Program menu as shown in Fig. 74.
OFFSET
THROT RNG
ACTION
SETBACK
EXIT
o
F
-10
3.3.1. SETPOINT OFFSET (MOD 2 only)
ENTER
SETPOINT
OFFSET
FOR
This value is the number of degrees plus (+) or minus (-)
that you want the temperature to be offset from the
MOD 1 setpoint. See Fig. 75. For example, If you want
the MOD 2 setpoint to be 10°F less than the MOD 1
setpoint, enter -10°F.
MOD 2
M24547
Fig. 74. Program - Setpoint Offset (MOD 2 only).
1. From the menu, use the S and T buttons to
highlight OFFSET.
2. Press the X button to display the value.
3. Use the S and T buttons to increase/decrease the
desired temperature.
°F
220
SP MAX A1
OFFSET Default: 0°F
(BOILER MAX)
210
OFFSET Range: -150°F to 150°F (-101°C to 66°C)
4. Press the X button to accept the value and display
the next option.
MOD 1
S
200
SETPOINT
E
N
190
S
O
R
180
170
3.3.2. Second Modulating Output and
Relays Programming
To complete the programming of MOD 2 or a Relay,
perform the procedures in “3.2.5. THROTTLING RANGE
or DIFFERENTIAL” through “3.2.7. SETBACK OFFSET
(if configured)” beginning on page 30.
A
MOD 2
SETPOINT
OFFSET
-10°F
SP MIN A2
(BOILER MIN)
160
150
140
10
30 40 50 60
80 °F
20
70
RESET B1
(OUTSD MIN)
RESET B2
(OUTSD MAX)
3.4. Exit Programming with Reset
When you finish programming the Modulating outputs and
the Relays, press the HOME button to leave programming
mode and return to the home screen.
SENSOR B
M24569
Fig. 75. Reset Curve with Offset for MOD 2.
This completes the programming procedure for
controllers that use Reset.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
4. SCHEDULING
Scheduling provides the ability to set daily temperature
settings for up to two events per day. Typically, these are
the daytime (setpoint) and the nighttime (setback)
settings.
1.
2.
If you press the HOME button or there is no
keypad activity for four minutes, you exit
Scheduling mode and return to the home
screen.
If you press the MENU button, you exit
Scheduling mode and return to the menu.
IMPORTANT
To enable Scheduling, you must first enter Setup
mode (press and hold the MENU button for 5
seconds), select OUTPUTS, select OPTIONS,
select USE SCHED, and then select YES. (see
“1.3.3.1. USE SCHED” on page 21).
To create or change a schedule, you use the —
•
•
•
Left arrow button(W) to scroll backward through the
Setup menus
Right arrow button (X) to select the highlighted menu
item and display its content
IMPORTANT
To properly account for Daylight Saving time, be
sure to set the Date before setting the Time.
See “4.2.2. SET DATE” on page 34.
Up and Down arrow buttons (S and T) to scroll up
and down through a list of items or to increase or
decrease the value of a displayed setup parameter
NOTE: The T775U controller interface is intuitive. You
may find that you do not need the following
scheduling instructions. You may want to use
this procedure simply as a reference to locate
the particular option or parameter of interest.
Creating a Schedule
To create a schedule, perform the following in the order
listed:
1. Enable Scheduling in Setup mode - see “1.3.3.1.
USE SCHED” on page 21
2. Enter Schedule mode — see “4.1. Entering Sched-
ule Mode”
3. Set the Schedule Options — see “4.2. OPTIONS”
4. Set Individual Schedules — begin with “4.3. Setting
Individual Schedules” on page 35
5. Exit Schedule Mode — see “4.4. Exiting Scheduling
Mode” on page 36
NOTE: Each output is independently configurable to
follow the schedule or not. For modulating
outputs, see “1.3.1.5. SCHEDULE” on page 19.
For relay outputs, see “1.3.4.1. SCHEDULE” on
page 23.
NOTES:
4.1. Entering Schedule Mode
MENU
SCHEDULE
MENU
SCHEDULE
Press the MENU button, then select SCHEDULE and
press the X button to view the Schedule menu.
OPTIONS
MON-FRI
SAT-SUN
MONDAY
TUESDAY
WEDNESDAY
THURSDAY
FRIDAY
SATURDAY
SUNDAY
EXIT
M24620
Fig. 76. Schedule - Menu.
MENU
4.2. OPTIONS
MENU
SCHEDULE
OPTIONS
SCHEDULE
OPTIONS
1. From the Schedule menu, use the S and T buttons
to highlight OPTIONS.
2. Press the X button to display the Options menu.
SET TIME
SET DATE
DAYLIGHT
EXIT
M24621
Fig. 77. Schedule - Options Menu.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MAIN
MAIN
4.2.1. SET TIME
Setting the system time is required to enable the
controller to follow daylight saving time.
SCHEDULE
OPTIONS
SET TIME
SCHEDULE
OPTIONS
SET TIME
IMPORTANT
Set the Date before setting the Time. See
“4.2.2. SET DATE”.
08:12 AM
1. From the Options menu, use the S and T buttons
to highlight SET TIME.
2. Press the X button to display the current system
time setting.
3. Use the X button to cycle between the hour,
minute, and AM/PM values.
4. Use the S and T buttons to increase/decrease the
desired value for the hour, minute, and AM/PM.
5. Press the W button to accept the Time and return to
the Options menu.
SET
SYSTEM
TIME
M24622
Fig. 78. Schedule - Options - System Time.
MAIN
MAIN
4.2.2. SET DATE
Setting the system date is required to enable the
controller to follow daylight saving time.
SCHEDULE
OPTIONS
SET DATE
SCHEDULE
OPTIONS
SET DATE
IMPORTANT
To properly account for Daylight Saving time, be
sure to set the Date before setting the Time.
01/01/2007
1. From the Options menu, use the S and T buttons
to highlight SET DATE.
2. Press the X button to display the current system
SET
SYSTEM
DATE
date setting.
M24623
3. Use the X button to cycle between the month, day,
and year values.
4. Use the S and T buttons to increase/decrease the
desired value for the month, day, and year.
5. Press the W button to accept the Date and return to
the Options menu.
Fig. 79. Schedule - Options - System Date.
MAIN
MAIN
SCHEDULE
SCHEDULE
4.2.3. DAYLIGHT (daylight saving time)
OPTIONS
OPTIONS
DAYLIGHT
DAYLIGHT
1. From the Options menu, use the S and T buttons
to highlight DAYLIGHT.
2. Press the X button to display the current system
YES
NO
setting for daylight saving time.
3. Use the S and T buttons to select YES or NO.
Default: YES
4. Press the X button to accept the value and return to
USE
DAYLIGHT
SAVING
TIME
the Options menu.
5. From the Options menu, use the Use the S and T
buttons to highlight EXIT.
M24624
6. Press the X button to return to the Schedule menu.
Fig. 80. Schedule - Options - Daylight Saving Time.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MENU
4.3. Setting Individual Schedules
MENU
SCHEDULE
MON-FRI
SCHEDULE
MON-FRI
As shown in the Schedule menu (Fig. 76 on page 33),
schedules can be set for the following time periods:
E1 SETPT
•
•
•
Monday through Friday
Saturday and Sunday
Individual days of the week
E1 TIME
E2 SETPT
E2 TIME
EXIT
1. From the Schedule menu, use the S and T buttons
to highlight the desired time period.
2. Press the X button to display the Schedule menu
for the selected time period.
M24625
For each selected time period, the schedule event (E1
and E2) parameters are exactly the same as shown in
Fig. 81.
Fig. 81. Schedule Event Menu (Showing MON-FRI).
SCHEDULING EXAMPLE
Setting the schedule is independent of the temperature
settings for the relay outputs. Table 5 illustrates a weekly
schedule for daytime (setpoint) and night time (setback)
use and shows the factory default settings.
Table 5. Mon-Fri Schedule Defaults
DAY
EVENT
SETPT ACTION
TIME
6:00 AM
6:00 PM
a
b
Mon-Fri Event 1 (E1)
Mon-Fri Event 2 (E2)
Setpoint
Setback
Sat-Sun
Not used; remains in Setback from the
Mon-Fri E2 settings
a
Setpoint time span is 6:00 AM until 5:59 PM because
setback starts at 6:00 PM.
b
Setback time span is 6:00PM until 5:59 AM because
setpoint starts at 6:00 AM.
To set a schedule, continue with “4.3.1. E1 SETPT
(setpoint for event 1)”.
The following figures show the MON-FRI menu, but the
menu selections are the same for any time period.
MAIN
MENU
SCHEDULE
SCHEDULE
4.3.1. E1 SETPT (setpoint for event 1)
MON-FRI
MON-FRI
E1 SETPT
E1 SETPT
1. From the selected time period menu, use the S and
T buttons to highlight E1 SETPT.
2. Press the X button to display the setpoint options.
3. Use the S and T buttons to highlight the desired
option.
SETPOINT
SETBACK
NOT USED
4. Press the X button to accept the value and return to
the selected time period menu.
SELECT
SETPOINT
FOR
EVENT 1
M24626
Fig. 82. Schedule - Event 1 Setpoint.
35
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
MAIN
MAIN
4.3.2. E1 TIME (time for event 1)
SCHEDULE
MON-FRI
E1 TIME
SCHEDULE
MON-FRI
E1 TIME
1. From the selected time period menu, use the S and
T buttons to highlight E1 TIME.
2. Press the X button to display the current time set-
ting for event 1.
3. Use the X button to cycle between the hour,
minute, and AM/PM values.
6:00 AM
4. Use the S and T buttons to increase/decrease the
desired value for the hour, minute, and AM/PM.
5. Press the W button to accept the time and return to
the selected time period menu.
SET
TIME
FOR
EVENT 1
M24627
Fig. 83. Schedule - Event 1 Time.
4.3.3. E2 SETPOINT (setpoint for event 2)
Creating the setpoint for event 2 is accomplished the
same way as the first event. See “4.3.1. E1 SETPT
(setpoint for event 1)” on page 35 above.
4.3.4. E2 TIME (time for event 2)
Creating the time for event 2 is accomplished the same
way as the first event. See “4.3.2. E1 TIME (time for event
1)” above.
4.3.5. EXIT (exit from selected time period
settings)
After entering the time for event 2, use the W button to exit
the schedule time period and return to the Schedule menu
to select a different time period.
When you finish scheduling the time periods, continue
with “4.4. Exiting Scheduling Mode”.
4.4. Exiting Scheduling Mode
Press the HOME button to exit the Schedule menu and
return to the home screen display.
or
Press the W button to return to the menu, then use the S
and T buttons to highlight EXIT from the menu and press
the X button.
MENU
PROGRAM
SCHEDULE
SUMMARY
EXIT
This completes the Scheduling procedure.
M24628
Fig. 84. Scheduling Mode Exit.
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
Error Message
There is a two-character error code that displays in
response to controller software problems:
SUMMARY MENU
The Summary menu provides the ability to view the
schedule (E1 and E2 times) for each relay for each day of
the week.
EE
EEPROM Failure— The values read back from
NOTE: Scheduling must be enabled for the Summary
menu to display. Enabling the schedule is
determined in the Setup process for the Output
Options (see page 21).
the EEPROM are not the same as written into the
EEPROM. This error cannot be field repaired. Replace
the device.
Diagnostic Messages
There are two diagnostic messages that can display in
response to sensor problems. The diagnostic codes that
can flash on the display are:
MENU
MENU
SUMMARY
SUMMARY
– –
MONDAY
Sensor Open or Shorted — Two dashes display
when a sensor (typically temperature) is open or
shorted. An open circuit is considered anything
greater than 1570 ohms (greater than 300F), shorted
anything less than 770 ohms (less than -73F). Which-
ever stages are operating with this sensor cease to
control (meaning relays go to OFF and proportional
outputs go to zero percent).
RELAY 1-2
E1: 06:00AM (72)
E2: 06:00PM (65)
M24629
Fig. 85. Summary Example - Monday Settings.
This message can also mean that the sensor is pro-
grammed, but not physically connected.
For each relay, the Summary display indicates the time
and temperature (in parenthesis) for each of the two
scheduled events E1 and E2.
-60°F or 270°F (-51°C or 132°C) Blinking
Temperature Out of Range — The temperature
display blinks when the sensed temperature range is
outside of the display range, below -60°F (-51°C) or
above 270°F (132°C). The displayed value remains at
that displayed limit and control continues. Controller
continues to function unless an open or shorted state
is detected.
1. Press the MENU button to view the menu.
2. Use the S and T buttons to highlight SUMMARY.
3. Press the X button to display the Summary
settings.
4. Use the X button to scroll forward through each day
of the week (Monday, Tuesday, Wednesday,
Thursday, Friday, Saturday, and Sunday).
5. While viewing a specific day, use the S and T
buttons to cycle through the individual relay
schedules for that day.
Blinking relay status
Relay Minimum Off Time is Active — On the home
screen, each relay’s indicator () blinks while the
relay’s minimum off time is active.
When finished, press the HOME button to return to the
home display screen.
SPECIFICATIONS
If programmed for Reset control, the Summary setpoints
display as “RES” instead of a temperature value. For
example, the display would show:
MONDAY
Power: 24, 120, or 240 Vac; 50/60 Hz
A separate earth ground is required for any power
source.
STAGES
Power Consumption:
E1: 06:00AM (RES) - indicating Reset
E2: 06:00PM (05)
•
•
8 VA maximum at 60 Hz
10 VA maximum at 50 Hz
- setback/offset degrees
Operating & Storage Temperature Ambient Rating:
TROUBLESHOOTING
•
•
-40°F to 125°F (-40°C to 52°C) @ 50 Hz
-40°F to 140°F (-40°C to 60°C) @ 60 Hz
Power Loss
Relative Humidity: 5% to 95% non-condensing
The date and time settings are retained for 24 hours after
a power outage. After a power loss of more than 24 hours,
the date and time settings may need to be reentered. All
other settings are stored permanently.
Relay Contact Output Ratings (N.O. and N.C.):
•
•
•
•
1/2 hp; 9.8 AFL, 58.8 ALR @ 120 Vac
1/2 hp; 4.9 AFL, 29.4 ALR @ 240 Vac
125 VA pilot duty @ 120/240 Vac
10A @ 24 Vac (resistive)
Errors and Diagnostics
The controller provides an error message and diagnostic
status as described below.
Modulating Outputs:
•
•
•
•
•
0-10 Vdc; drive a minimum of 2,000 Ohms
2-10 Vdc; drive a minimum of 2,000 Ohms
4-20 mA; drive a maximum of 600 Ohms
Electronic Series 90
Floating
37
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
reasonable protection against harmful interference in
DoC
residential installations. This equipment generates, uses,
and can radiate radio frequency energy, and if not
installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
Emissions Compliance
EN 55022: 2006
CISPR 22: 2006
VCCI V-3/2006.04
ICES-003, Issue 4: 2004
FCC PART 15 SUBPART B Class B Limit
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does
cause interference to radio or television equipment
reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following
measures:
— Reorient or relocate the receiving antenna
— Move the equipment away from the receiver
— Plug the equipment into an outlet on a circuit different
from that to which the receiver is connected
— Consult the dealer or an experienced radio/television
technician for additional suggestions
Immunity Compliance
EN 61000-6-1: 2001 covering
EN 61000-4-2: 1995 + A1: 1998 + A2: 2001
EN 61000-4-3: 2002
EN 61000-4-4: 2004
EN 61000-4-5: 1995 + A1: 2001
EN 61000-4-6: 1996 + A1: 2001
EN 61000-4-8: 1993 + A1: 2001
EN 61000-4-11 2nd Ed.: 2004
You are cautioned that any change or modifications to the
equipment not expressly approve by the party responsible
for compliance could void Your authority to operate such
equipment.
Safety Compliance
UL 60730-1 for US and Canada
This device complies with Part 15 of the FCC Rules.
Operation is subjected to the following two conditions 1)
this device may not cause harmful interference and 2) this
device must accept any interference received, including
interference that may cause undesired operation.
FCC Compliance Statement:
This equipment has been tested and found to comply with
limits for a Class B digital device, pursuant to Part 15 of
the FCC rules. These limits are designed to provide
62-0255—07
38
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T775U SERIES 2000 CONTROLLER
39
62-0255–07
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T775U SERIES 2000 ELECTRONIC STAND-ALONE CONTROLLER
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
® U.S. Registered Trademark
© 2009 Honeywell International Inc.
62-0255—07 E.K. Rev. 10-09
Printed in U.S.A.
Toronto, Ontario M1V 4Z9
customer.honeywell.com
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