TZ-3 TotalZone® Zone Control Panel
PRODUCT DATA
FEATURES
•
•
•
Up to three stages heat and two stages cooling can be
controlled by thermostat or built-in timer, based on the
number of zones calling.
Controls up to three zones and can be expanded with
TotalZone Add-A-Zone zone Control Panel for up to 30
zones.
Uses virtually any Honeywell four-wire, single-stage,
multi-stage, or Trol-A-Temp heat pump thermostat.
•
•
Zone-A-Lone central setback feature.
Purge timer protects equipment between calls for heat
or cool with choice of continually on or equipment
controlled fan.
•
System and zone damper LEDs indicate system and
damper status.
•
•
Individual zone fan control.
Optional Discharge Air Temperature Sensor for
capacity control with adjustable high and low limits.
•
Thermal circuit breaker protects panel and transformer
from damage if miswired.
APPLICATION
The TZ-3 TotalZone Zone Control Panel controls single-stage,
multi-stage, conventional or heat pump heat/cool equipment.
It controls 2 or 3 zones, and is expandable up to 30 zones with
optional TotalZone® Add-A-Zone™ Zone Control Panel.
For technical support, call 1-800-TAT-Temp (1-800-828-8367).
Contents
Application.........................................................................1
Features ............................................................................1
Specifications ....................................................................2
Installation .........................................................................4
Startup and Checkout........................................................9
Operation...........................................................................10
Troubleshooting.................................................................13
® U.S. Registered Trademark
Copyright © 2001 Honeywell • All Rights Reserved
68- 0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
Table 2. Recommended Dampers.
Round
Honeywell Damper Type
Power-open/power-closed
Rectangular
MARD
IOBD
AOBD
AOBD-BM
CDO-51
Spring-open/power-closed
ARD
ZDB
ZDS
Table 3. Required Accessories (Not Supplied With Panel).
Description
Bypass Rating
(cfm)
Accessory
40 VA transformer
AT140D1046 (PMT-40)
—
—
Capacity protector
ZMS, DATS (C7735A1000)
Round static pressure regulator
damper
7 SPRD
8 SPRD
9 SPRD
10 SPRD
12 SPRD
14 SPRD
16 SPRD
18 SPRD
300
400
600
750
1200
1800
2400
3200
Rectangular static pressure regulator
damper
12 x 8 SPRD
12 x 10 SPRD
12 x 12 SPRD
20 x 8 SPRD
20 x 10 SPRD
20 x 12 SPRD
1000
1200
1400
1600
2000
3000
3
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
INSTALLATION
Mounting
CAUTION
Do not mount TZ-3 inside HVAC equipment
RETURN
AIR
Equipment Damage Hazard.
Mount only on wall or on cold air return
T2-3
OPTIONAL
LOCATION
1.
Mount the thermostats in each zone of the living space
using the installation instructions provided with each
thermostat.
T2-3
EL
EC
TR
ON
IC
AI
R
CL
EA
NE
R
2.
3.
4.
Mount the dampers in the ductwork using the installa-
tion instructions provided with each damper.
Mount the TZ-3 zone panel near the HVAC equipment;
locate it on a wall or on the cold-air return. See Fig. 2.
Level the TZ-3 for appearance only.
WATER
HEATER
FURNACE
OR BOILER
HIGH
EFFICIENCY
AIR CLEANER
M19063
Wiring
Fig. 2. TZ-3 mounting location.
Wiring Diagrams (Fig. 3-17)
CAUTION
Can cause electrical shock or equipment damage.
Disconnect power before continuing installation.
Voltage Hazard.
Conventional Thermostats
The C (common) terminal is used only on thermostats that
require a common (for example:T8601). See Fig. 3. Wire the
W2 terminal on a multi-stage thermostat (for example: T8624)
to the W2 on the panel for second stage control from the
thermostat. If the thermostat has a Y2 terminal, do not
connect it to the panel.
Wiring must comply with applicable codes, ordinances, and
regulations.
1.
2.
3.
Connect thermostats as shown in Fig. 3-5.
Connect dampers as shown in Fig. 6-10.
Connect the Discharge Air Temperature Sensor (not
supplied) to the TL terminals.The wires are not polar-
ized. See Fig.12.
ZONE CONNECTIONS ON PANEL
4.
Connect Add-A-Zone panels (if used) to the AZ1 and
AZ2 terminals. The AZ1 terminal on the TZ-3 must be
wired to the AZ1 terminal on the TAZ panel. Similarly,
the AZ2 terminal must be wired on the TZ-3 to the AZ2
on the TAZ. See Fig. 13.
THERMOSTAT
G Y R
MOTOR
M6 M4 M1
W2
L
W
5.
6.
Connect the HVAC equipment to the EQUIP terminals
on the panel. See Fig. 14-17.
Connect a 40 VA, 24 volt transformer to TR1 (hot) and
TR2 (common). This must be a dedicated transformer
and any additional TAZ boards also each require a
transformer. See Fig. 11.
G
Y
R
W
C
ZONE THERMOSTAT
M19064
Fig. 3. Typical single-stage thermostat wiring.
Heat Pump Thermostats
Select a heat pump thermostat from Table 1. If the thermostat
selected has a separate Y1 and W1, see Fig. 4. When using
the thermostat to control the second stage of heat (W2), set
DIP switch 5 to On, and DIP switch 1 to Off. Set both DIP
switches 6 and 7 to Off.
68-0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
ZONE CONNECTIONS ON PANEL
MOTOR TERMINALS
M6 M4 M1
THERMOSTAT
MOTOR
W2
L
G
Y
R
W
M6 M4 M1
4
1
5
2
6
3
Z
X
FIELD JUMPER
E
W2
L
G
Y1
R
W1 C/X
ZONE THERMOSTAT
M19065
M19067
DAMPER MOTOR
Fig. 4. Heat pump thermostat with separate Y1 and W1
terminals and multi-stage thermostat wiring.
Fig. 6. AOBD single damper wiring.
If the thermostat selected has a single Y terminal, see Fig. 5.
Select a single Y thermostat for each zone. See Table 1.
MOTOR TERMINALS
M6 M4 M1
FIELD JUMPER
Set DIP switch 6 or 7 (not both) to the On position. Set switch
6 to On when B on the thermostat is wired to W on the panel.
Set switch 7 to On when 0 on the thermostat is wired to W on
the panel.
4
1
5
2
6
3
Z
X
4
1
5
2
6
3
Z
X
When using the zone thermostat to control the second stage
of heat (W2), set DIP switch 5 to On, and DIP switch 1 to Off.
DAMPER MOTORS
ZONE CONNECTIONS ON PANEL
M19068
THERMOSTAT
G Y R
MOTOR
M6 M4 M1
W2
L
W
Fig. 7. AOBD multiple damper wiring.
ARD or ZD Dampers
Wire the ARD or ZD Damper to the panel as shown in Fig. 8.
Multiple dampers can be wired in parallel. When ARD or ZD
damper is used, the zone LEDs switch directly from red to
green (never amber).
E
W2
L
G
Y
R
O
C/X
HEAT PUMP ZONE THERMOSTAT
M19066
DAMPER TERMINALS
ON PANEL
Fig. 5. Heat pump thermostat with single Y thermostat
wiring.
M6 M4
M1
AOBD Dampers
Wire the AOBD, AOBD-BM and IOBD Dampers to the panel
as shown in Fig. 6. See Fig. 7 when using two dampers on
one zone. When three or more dampers are controlled on
one zone, a slave damper control relay (SDCR) is required.
POWER CLOSE
SPRING OPEN
MODEL ARD, ZDS, ZDB
M19037A
Fig. 8. ARD or ZD Damper wiring.
MARD or CDO-51 Dampers
Wire the MARD or CDO-51 Damper to the panel as shown in
Fig. 9. These are floating control modulating dampers, but are
controlled as two-position dampers on the TZ-3 panel.Two
dampers can be wired in parallel.
5
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
ZONE CONTROL PANEL
DAMPER TERMINALS
M6
M4
M1
ZMS
SENSOR
TL
TL
MARD OR CDO-51
COM / M1
M19072
CL / M6
OP / M4
Fig. 12. Discharge Air Temperature Sensor (C7735A or
ZMS) wiring.
M19069
Add-A-Zone Panel
Wire the Add-A-Zone (TAZ) Panel to the TotalZone (TZ-3)
Panel as shown in Fig. 13. Up to nine TAZ Panels can be
wired to one TZ-3 panel. See Fig. 13.
Fig. 9. MARD and CDO-51 Damper wiring.
ML6161 Motor Actuator
When the ML6161 Motor Actuator is used, wire as shown in
Fig. 10. Wire the R8222 relay to prevent the damper LED from
constantly lighting amber.
Use 18-gauge thermostat wire for runs up to a maximum of
500 feet. Keep these wires at least 12 in. from line voltage
wiring and equipment; otherwise, use shielded cable wiring.
IMPORTANT:
When multiple panels are used, it is important that
the transformers be in-phase. Check the phasing by
measuring for 24V across the TR2 transformer termi-
nals on each panel. There should be 0 Vac. If not,
reverse the TR1and TR2 transformer wires on one of
the panels and recheck.
ZONE CONTROL PANEL
DAMPER TERMINALS
ZONE
THERMOSTAT
TERMINAL
M6
M4
M1
R
ML6161
COM / M1
R8222 RELAY
CL / M6
OP / M4
AZ1
TZ-3
AZ2
M19070
AZ1
TAZ
AZ2
Fig. 10. ML6161 Damper Motor Actuator wiring.
Transformer
Wire the transformer to the panel as shown in Fig. 11.
AZ1
TAZ
AZ2
NOTE: If the installation includes an Add-A-Zone panel, see
the TotalZone Add-A-Zone Panels section.
TO ADDITIONAL
TAZ PANELS
M19073
Fig. 13. TotalZone Add-A-Zone wiring.
24 VOLT
TRANSFORMER
TR2
TR1
Conventional Equipment
Wire the heating and cooling equipment to the equipment
terminals on the TZ-3 Panel as shown in Fig. 14.
Electric Furnaces: Set DIP switch 8 to On to energize the fan
with a call for heat.
24V, 40 VA
TRANSFORMER
C
R
MODEL AT140D1046
M19071
Hydro-Air: Wire the zone valve or circulator relay to the W1
equipment terminal. (If the circulator relay has powered
terminals, use an isolation relay.) Set DIP switch 8 to On to
energize the fan with a call for heat.
Fig. 11. Transformer wiring.
Discharge Air Temperature Sensor
Wire the C7735A or the ZMS to the panel as shown in Fig. 12.
Oil Heat: Wire an isolation relay on the W equipment wire to
isolate the oil primary from the panel.
68-0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
Multi-Stage: Wire the equipment as shown in Fig. 14 using the
W2 terminal for second stage of heat and the W3 terminal for
third stage of heat. Wire the Y2 for second stage of cooling.
REMOTE OCCUPIED/
UNOCCUPIED CONTROL
(CLOSE IN UNOCCUPIED)
HEAT
COOL
PURGE
FAN
EM.HT
ZONE 1
ZONE 2
ZONE 3
TM
ZoneMAX
TEMPERATURE
SENSOR
ON
ZoneMAXTM
TL
TL
BOOT
OFF
TO TERMINAL AZ2 ON TAZ (IF USED)
TO TERMINAL AZ1 ON TAZ (IF USED)
AZ2
AZ1
OCCUP
REMOTE
130
F
140
F
15 MINUTES
10 MINUTES
20 MINUTES
25 MINUTES
30 MINUTES
120
110
F
F
150
160
F
F
5
MINUTES
Add-A-Zone
OVERRIDE
PURGE
MAXIMUM
TEMPERATURE
STAGE TIMER
OUTDOOR CONDENSING UNIT
ON
UNOCCUP
Y2
Y1
O
Y2
1
2
3
4
5
6
7
8
Y
OC
C
R
OC
24V TRANSFORMER
R
G
TR2
TR1
B
FAN RELAY
G
W1
E
HEAT RELAY
W
W2
W3
ZONE 1
MOTOR
M1
ZONE 2
ZONE 3
MOTOR
M1
W2
THERMOSTAT
THERMOSTAT
MOTOR
M1
THERMOSTAT
2 STAGE
EM HEAT
W2
L
G
Y
R
W
M6 M4
W2
L
G
Y
R
W
M6 M4
W2
L
G
Y
R
W
M6 M4
HVAC CONTROLS
MODEL TZ-3
C
G
Y
R
W
C
G
Y
R
W
C
G
Y
R
W
ZONE 1
THERMOSTAT
ZONE 2
THERMOSTAT
ZONE 3
THERMOSTAT
C
R
24V, 40 VA
TRANSFORMER
4
1
5
2
6
3
Z
X
4
1
5
6
3
Z
X
2
MODEL ARD OR
ZD DAMPERS
OPPOSED BLADE DAMPER MOTORS
M19074
Fig. 14. Heating and cooling equipment.
Two-speed Compressor: Wire the second stage compressor
to both Y2 and W2. Wire the auxiliary heat to W3. Remove the
two-stage emergency heat jumper and install a jumper from
W3 to E.
Heat Pump Equipment
Wire the heat pump to the equipment terminals on the panel
as shown in Fig. 15. Refer to manufacturer’s instructions for
additional wiring instructions and substitute the TZ-3
equipment terminals for the thermostat terminals shown.
Fossil Fuel Kits with Heat Pumps: Wire these systems like
Fig.15 but use the manufacturer’s fossil fuel kit. Wire the
Trane XL 1800 and the TAYPLUS 103 as shown in Fig. 16.
The recommended thermostat is theT8611G2051.
IMPORTANT
Some heat pump manufacturers (such as York and
Trane) use the B terminal as the transformer com-
mon. Do not connect the common from the equip-
ment to the zone control panel.
7
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
OUTDOOR CONDENSING UNIT
TZ-3
PANEL
COMPRESSOR
RELAY
Y
Y2
Y1
O
REVERSING
VALVE (COOL)
O
C
R
24V TRANSFORMER
FAN RELAY
R
G
G
B
W1
E
EMERGENCY
HEATING RELAY
E
W2
W3
2 STAGE
HEATING RELAY
W2
EQUIP
M19075
HEAT PUMP CONTROLS
Fig. 15. Heat pump with auxiliary heat wiring.
.
HEAT
COOL
PURGE
FAN
EM.HT
ZONE 1
TAYPLUS 103
ZoneMAXTM
W3
Y2
X2
Y3
Y1
X3
B
G3
G1
W1
TL
TL
AZ2
AZ1
130
F
140
F
15 MINUTES
10 MINUTES
20 MINUTES
25 MINUTES
30 MINUTES
120
110
F
F
150
160
F
F
5
MINUTES
Add-A-Zone
OVERRIDE
PURGE
MAXIMUM
TEMPERATURE
STAGE TIMER
ON
Y2
Y1
O
1
2
3
4
5
6
7
8
R
G
G
W2
W1
B
B
T
W1
E
F
Y2
R
W2
W3
ZONE 1
MOTOR
M1
ZONE 2
O
THERMOSTAT
W2 L
THERMOSTAT
MOTOR
M1
M6 M4
Y
B
2 STAGE
EM HEAT
G
Y
R
W
M6 M4
W2 L
G
Y
R
W
YLO
BK
R
Y1
O
MODEL TZ-3
ODT
1
X2
2
3
W2
L
G
Y
E
R
O/B C
VARIABLE
SPEED
GAS
TRANE XL1800
CONDENSING
UNIT
T8611G2051
FURNACE
1
3
5
NOTES:
1. DIP SWITCHES 6 OFF AND 7 ON.
2. DIP SWITCHES 1 OFF AND 5 ON.
K2
3. T8011R OR T8411R MAY ALSO BE USED.
4. REMOVE THE 2 STAGE EM HEAT JUMPER.
4
M19076
Fig. 16. Trane XL 1800 with TAYPLUS 103 in restricted mode wiring.
Fig. 17. Turn DIP switch number 8 to On for fan on in heat.
Remove the two-stage emergency heat jumper.
Water Source Heat Pumps
Wire the equipment, as applicable, to the TZ-3 as shown in
68-0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
Waterfurnace: Wire this system to the panel as shown in Fig.
17 except use two isolation relays on compressor wires W1,
Y1 and W2, Y2.
R
Y2
Y1
O
C
1ST STAGE COMPRESSOR
R
Y1
G
2ND STAGE COMPRESSOR
AUXILIARY HEAT
B
Y2
W
W1
E
W2
W3
O
G
2 STAGE
EM. HT.
M19077
Fig. 17. Water source heat pump wiring.
panel, the Idle LED flashes seven times before entering
STARTUP AND CHECKOUT
the Purge mode.) Then the Idle LED turns red and each
damper LED turns green.
5. Set zone one thermostat to heat and raise the setpoint
to call for heat. Verify that the heat LED is red and zone
one damper remains green while the other damper LED
turns red.
6. Raise zone two setpoint to call for heat. Lower zone one
setpoint to stop the call for heat to that zone. Verify that
zone one LED turns red (it may be amber while moving)
and zone two LED turns green.
After the installation is complete, verify correct operation as
follows:
1. Place the Em Heat switch in the Off (down) position.
2. Place the Zone-A-Lone switch in the Occup/Remote
(up) position.
3. Verify that the DIP switches are set correctly. See
Sequence of Operation section and Table 6 for correct
configuration.
4. Power up the TZ-3 and set the thermostats so no zones
are calling. The board then enters the Purge mode
where all dampers open and the fan operates for two or
three and one-half minutes (configurable). (If there is
no Discharge Air Temperature Sensor connected to the
7. Repeat for zone three.
8. Alternately, lower the setpoint to call for cooling.Verify
that the green cool LED illuminates.
9
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
OPERATION
Sequence of Operation
Single and Multi-Stage Operation
On a call for heating or cooling, the zone damper stays open
to the calling zone, and the dampers close to the zones that
are not calling. The TZ-3 panel brings on the heating or
cooling and conditioned air is delivered to the calling zone
until that zone is satisfied. When the call is satisfied, the
system enters the Purge mode. This holds open the damper
of the last zone calling and purges into that zone. The purge
time can be set to three and one-half or two minutes. After
purge, all dampers return to the Open position.
The panel can control up to three stages of heating and two
stages of cooling. The first stage is energized by the
thermostat. The second stage of heating is brought on by the
thermostat, timer, or number of zones calling. The third stage
of heating is brought on by the timer or number of zones
calling. The second stage of cooling is brought on by the timer
or number of zones calling.
The following instructions show how to configure the panel for
stage control.
Any zone thermostat can call for heating or cooling. If there
are co-existing calls for heat and cool, the panel first accepts
the first call. Once that call is satisfied, or a maximum of 20
minutes has elapsed, the panel switches to allow the opposite
call.
If the equipment is single stage, set the DIP switches as
follows:
DIP Switch Number
Status
Off
On a call for heating or cooling, the heat LED illuminates red
or the cool LED illuminates green. The zone damper LED
turns green for the zone calling, and the dampers in the zones
not calling close and turn red. As AOBD dampers move, the
LEDs turn amber.
1
5
Off
1st Stage by Thermostat, 2nd and 3rd Stages by
Timer (Fig. 18)
The thermostat controls the first stage of heat or cool. If the
call is not satisfied by the first stage within the time set on the
timer, the panel energizes the second stage. If the call for heat
is not satisfied by the second stage within the time set on the
timer, the panel brings on the third stage.
Purge Mode
At the end of every call for heat or cool, the panel enters a
Purge mode that holds open the calling zone damper for three
and one-half or two minutes. During this time, the panel or the
HVAC equipment can operate the fan. Purge also serves as a
time delay to prevent short cycling of the heating and cooling
equipment after each call. Purge LED lights to signal that the
system is in the Purge mode. Pressing the purge override
button for two seconds overrides the Purge mode. Unless
there is a new call for heat or cool during the Purge mode, all
dampers are moved to the Open position at the end of purge.
Set the DIP switches as follows:
DIP Switch Number
Status
Off
DIP Switch
1
5
Number
Status
Off
Purge Time
3.5 minutes
2 minutes
Off
3
3
On
15 MINUTES
10 MINUTES
5 MINUTES
20 MINUTES
25 MINUTES
30 MINUTES
DIP Switch
Number
Status
Fan Control
STAGE TIMER
M19078
4
Off
Panel control of fan
in purge
Fig. 18. Stage timer.
4
On
HVAC control of fan
in purge
1st Stage by Thermostat, 2nd Stage Heat by
Thermostat
The thermostat controls the first stage of heat or cool and the
second stage of heat. The timer controls the second stage of
cool and third stage of heat. If the first and second stages
combined do not satisfy the heat call within the time specified
on the timer, the panel brings on the third stage of heat.
Individual Zone Fan Control
When all zones are satisfied, the Fan switch of each
thermostat controls the fan operation for that zone. When the
Fan switch is in the On position, the fan is energized, and the
dampers close to zones where the Fan switch is in the Auto
position. If there is a call for heat or cool during this time, the
circulation mode ceases, and the heat or cool call is honored.
When the zone calling is satisfied, the circulation call
resumes.
Set the DIP switches as follows:
68-0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
.
stage heat using a 5-30 minute panel, or staging can be
controlled by the percentage of zones calling. The O and B
equipment terminals are energized for changeover use with
heat pumps.
DIP Switch Number
Status
Off
1
5
On
Heat Pump Thermostats
HEAT PUMP THERMOSTATS WITH SINGLE Y OUTPUT
Stages Based On Number of Zones Calling
Heat pump thermostats can be used if thermostat control of
nd
The thermostat controls the first stage of heat or cool. The
second stage of heat and cool and the third stage of heat are
energized by the percentage of zones calling. See Table 4.
Set the DIP switches as follows:
2
stage is desired. Thermostats that have a single Y
terminal for first stage heat and cool can be used. When
selected, all thermostats must be similar.
If the thermostat energizes O on a call for cool, DIP switch 7
must be set to On and the O thermostat wire connected to W
on the thermostat connections for that zone. If the thermostat
energizes B on a call for heat, DIP switch 6 must be set to On
and the B wire connected to W on the panel. In either case,
the O is always energized to the equipment in cooling, and the
B is always energized to the equipment in heating.
DIP Switch Number
Status
On
1
5
Off
IMPORTANT
Be sure DIP switches 6 and 7 are never both in the
On position.
See Table 4 to determine the number of zones required to
activate stages of equipment based on the number of zones in
the system. Staging is based on the zones available in the
system, not the number of zones used for the particular
application. As zones satisfy, stages 2 and 3 drop out.
HEAT PUMP THERMOSTATS WITH SEPARATE Y1 AND W1
TERMINALS
Use heat pump thermostats with separate Y1 and W1
terminals for first stage heat and cool. Keep DIP switches 6
and 7 in the Off position when thermostat O or B wire is not
used.
Table 4. Staging by Percentage of Zones Calling.
Number of Zones Required
Number of
Emergency Heat Control
Emergency heat is defined as using an auxiliary heat source
without using the heat pump. When the Em Heat switch or a
thermostat puts the panel in the emergency heat mode, the
heat pump is locked out and calls for heat are sent to the E
terminal.
Zones in
System
2nd Stage
Heat
3rd Stage
Heat
2ndStage
Cool
3
4
2
2
2
3
3
3
4
4
4
5
3
3
4
5
5
6
7
7
8
9
2
3
3
4
4
5
5
6
6
7
A heat pump thermostat can also control emergency heat
from the thermostat system switch. An L terminal energized
during the emergency heat mode is required. The
recommended heat pump thermostats all have hot L
terminals. See Table 1.
5
6
7
The two stage Em heat jumper connects W2 and E. Jumper
both pins to energize the W2 equipment on a call for
emergency heat. When E is a different source of heat than
W2, remove the jumper (for example, two-stage heat pump
with electric heat strip auxiliary heat ). The jumper is located
below the equipment terminals on the lower-left corner of the
panel.
8
9
10
11
12
Multi-Stage Thermostats
Use multi-stage thermostats to control two stages of heat via
W1 and W2 thermostat terminals. Control the third stage of
heat through the stage timer built into the panel. Control the
second stage of cooling with the timer.
Thermostat Operation
Conventional Thermostats
Manual and Automatic Changeover Thermostats
Automatic changeover thermostats provide automatic
changeover by zone. Manual changeover thermostats heat or
cool based on the mode of each zone thermostat.
Conventional (R,W,Y,G) heat/cool thermostats can be used
with the TZ-3 to control single or multi-stage gas, electric or oil
systems and heat pumps with auxiliary heat. The panel can
be configured to control second stage heat and cool and third
11
68-0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
Rebooting Microprocessor
Zone-A-Lone Switch
Certain conditions can hang up the microprocessor. To reset
it, press and release the Boot button. The system reboots and
enters the Purge mode.
When the Zone-A-Lone switch is in the occupied position and
the OC/OC terminals are not used, the system functions as a
normal zone control system. When switched to the
unoccupied position, all dampers are opened and all requests
for heat, cool, or fan, except from zone one, are not honored.
The zone one thermostat becomes the controlling thermostat
for the entire system. During long unoccupied periods, one
thermostat can be set back instead of adjusting each zone
thermostat in the building.
Discharge Air Temperature Sensor
The Discharge Air Temperature Sensor (not included) is a
supply-duct-mounted temperature probe used to control
capacity and prevent over-heating or coil-icing. The sensor
attaches to the TL terminals on the panel.
The T8601D2027 and T8611G2051 include two OC terminals.
When wired to the TZ-3 OC terminals, and with the Zone-A-
Lone switch in the occupied position, the board enters the
unoccupied mode during the Leave and Sleep programs. This
feature requires two extra wires to the Zone 1 thermostat.
Set the high limit temperature on the maximum temperature
dial on the panel, located left of the stage timer. See. Fig. 19.
Set the temperature from 110 °F to 160°F in ten-degree
increments. The recommended setting for fossil fuel/ electric
systems is 160°F (default factory setting). For heat pump
systems, the recommended setting is 120F.
Circuit Breaker Protection
The cooling temperature limit can be set at 40°F or 48°F.
A built-in thermal circuit breaker protects the TotalZone panel.
This circuit breaker protects the panel against shorts in the
thermostat and damper wiring and the remote occupied/
unoccupied switch. It does not protect against shorts in the
wiring of the HVAC equipment into the panel.
130 F
140 F
120 F
110 F
150 F
160 F
When the circuit breaker is tripped, none of the LEDs
illuminate and the yellow rectangular component located to
the left of the TR1 and TR2 terminals is hot to the touch.
Remove power to the panel for at least ten seconds to allow
the circuit breaker to cool off and reset. To eliminate the short,
verify the dampers and thermostat wiring.
MAXIMUM
TEMPERATURE
M19079
Fig. 19. Maximum temperature dial.
IMPORTANT
Be sure the Discharge Air Temperature Sensor wir-
ing does not run parallel with line voltage wiring
unless more than 12 in. of separation exists or
shielded cable is used.
Fan On In Heat
The system blower can be set to come on with a call for heat
as required for hydro-air, heat pump, or electric heat systems.
Set the blower using DIP switch 8.
Use DIP switch 2 to change cooling limit settings.
DIP Switch 8
Fan Control
HVAC system
Fan on in heat
Cooling
Off
On
Temperature
Dip Switch
Status
Off
Limit
40°F
48°F
2
2
TotalZone Add-A-Zone Panels
On
Using TotalZone Add-A-Zone Panels, the system can be
expanded to up to 30 zones. There are three models: TAZ-1,
one zone; TAZ-2, two zone; and TAZ-3, three zone. Two wires
are required to connect the TAZ to the TZ-3.
If the system trips due to exceeding a high or low temperature
limit, the heating or cooling system shuts down and the fan
continues running to purge the conditioned air from the
plenum.
IMPORTANT:
When multiple panels are used, it is important that
the transformers be in-phase. Check the phasing by
measuring for 24V across the TR2 transformer termi-
nals on each panel. There should be 0 Vac. If not,
reverse the TR1and TR2 transformer wires on one of
the panels and recheck.
When the low limit is tripped, the Cool LED flashes until it
resets. When the high limit is tripped, the Heat LED flashes
until it resets.
Once the temperature recovers by ten degrees, the
equipment run resumes.
See Fig. 13 and the TAZ installation instructions for more
information.
68-0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
TROUBLESHOOTING
Table 5. Troubleshooting.
Possible Cause
Symptom
Action
No LEDs are Illuminated
No power to the board.
Shorted wire.
Check for 24 Vac ( 10%) across TR1 and TR2
Check fuse. If hot, a short exists in thermostat, damper,
or Zone-A-Lone wiring.
Damper LEDs on, but no
other LEDs illuminated.
Insufficient voltage.
Check for 24 Vac ( 10%) across TR1 and TR2.
Incorrect configuration.
Check jumpers and DIP switches for correct
configuration.
Erratic Operation
Emergency Heat switch on.
Zone-A-Lone Feature on.
Incorrectly wired.
Turn off (down) Emergency Heat switch.
Turn off (up) Zone-A-Lone.
Heat pump operates
Verify that W1 and Y1 equipment terminals are jumped.
incorrectly or not at all.
Incorrectly configured.
Verify DIP switches 6 and 7 are correctly set for the type
of thermostat used.
Heat LED flashing.
Cool LED flashing.
High limit reached.
Low limit reached.
LED stops flashing with ten-degree fall.
LED stops flashing with ten-degree rise.
Idle LED flashes five times
on bootup.
ZMS problem or not
connected.
Verify that ZMS (if any) is connected, and wired
correctly.
Idle LED flashes
continuously
ZMS failure.
Check for dc voltage across TL terminals:
If 0 volt = short.
If 1 volt = open.
If .2 to .8 volt = normal.
Add-A-Zone not operating.
Incorrectly configured.
Incorrectly wired.
Verify DIP switch settings on the TAZ panels.
Check AZ1and AZ2 for correct wiring.
Be sure that AZ1 and AZ2 are at least 12 in. from line
voltage wiring.
Be sure the transformers are in-phase.
13
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68-0223-2
TZ-3 TOTALZONE® ZONE CONTROL PANEL
Table 6. DIP Switch Settings and Functions.
DIP Switch
Function
Off (default)
On
1
Staging by number of zones
calling.
Stages timer or thermostat
controlled.
Stages controlled by number of zones
calling.
2
3
4
5
6
ZMS low limit.
40°F
48°F
Purge mode timing.
Fan control during purge.
Control of W2 outpu.t
Three and one-half minutes.
Controlled by panel.
Timer controlled.
Two minutes.
HVAC equipment controlled
Controlled by W2 from thermostat,
Using B on single Y thermostat.
Cool changeover from
thermostat.
Not using B on single Y
thermostats; or using
conventional thermostats.
7
8
Heat changeover from
thermostat.
Not using O on single Y
thermostats; or using
conventional thermostats.
Using O on single Y thermostat.
Fan control in heat.
Fan controlled by panel in cool
and HVAC equipment in heat.
Panel in heat and cool controlling fan.
Table 7. LED Indicators.
Not Illuminated
LED
Heat
Color
Red
Illuminated
Heat call
Flashing
High limit reached
Low limit reached
ZMS failure
No heat calls.
Cool
Green
Amber
Red
Cool call
No cool calls.
Purge
Idle
Purge mode
No calls
Not in Purge mode.
Call for heat, cool, or fan.
Initial powerup without ZMS
wired
Fan
Green
Red
Fan only call
No fan only call.
—
—
—
EM Heat
Zone 1,2,3
Emergency Heat mode
Not in emergency Heat mode.
—
Zone
1,2,3
Green—open
Red—closed
Amber—moving (some
dampers)
68-0223-2
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TZ-3 TOTALZONE® ZONE CONTROL PANEL
See Fig. 20 for TZ-TotalZone Zone Control Panel.
SYSTEM STATUS
LED INDICATIORS
ZoneMAX™
TERMINALS
TEST JUMPERS
(NOT USED)
ZONE DAMPER
LED INDICATORS
BOOT
BUTTON
ZoneMAX™
TEMP
SETTING
EMERGENCY
HEAT SWITCH
ADD-A-
ZONE™
TERMINALS
STAGE
TIMER
ZONE-A-
LONE™
SWITCH
HVAC
EQUIPMENT
TERMINALS
REMOTE
ZONE-A-LONE™
CONTROL
TERMINALS
TRANSFORMER
TERMINALS
2 STAGE
EM HEAT
JUMPER
RESETTABLE
FUSE
ZONE, THERMOSTAT & DAMPER
MOTOR TERMINALS
DIP SWITCHES FOR
SYSTEM CONFIGURATION
M13421
Fig. 20. TZ-3 TotalZone Zone Control Panel.
15
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Home and Building Control Home and Building Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
68-0223-2 G.H. Rev. 9-01
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