TEL.: 905-670-2500
FAX: 905-795-8311
MISSISSAUGA, ONTARIO L5T 1H9
CUSTOMER SERVICE TEL.: 1-888-882-7626
D SERIES ELECTRIC FURNACE
!
WARNING
• Never tamper with the unit or its controls. User MUST contact • This furnace is not watertight and is not designed for outdoor
a specialized contractor when a failure occurs. DO NOT
ATTEMPT to repair.
• When using a humidifier make sure not to damage the heating
element bank.
installation. This furnace shall be installed in such a manner
as to protect its electrical components from water. Outdoor
installation leads to a hazardous electrical condition and to
premature furnace failure, thus voiding the warranty.
• Do not block the combustion air openings in the furnace.
Any blockage will result in improper overheat situation and
may result in a fire hazard and/or cause bodily harm.
• The unit must have an uninterrupted or unbroken electrical
ground to minimize personal injury if an electrical fault
should occur. When performing electrical connection, the
ground conductor must be firmly attached to the ground lug
in the furnace.
• We recommend that your unit be inspected by a specialized
technician once a year.
• Poor maintenance of air filters OR an unbalanced static
pressure may result in a performance decrease.
• Always use genuine parts for maintenance or service call.
The use of unbranded parts will void the warranty.
• The use of this unit without an air distribution duct will void
the warranty.
• Do not use this furnace as a construction heater. Use of this
furnace as a construction heater exposes the furnace to
abnormal conditions, contaminated combustion air and the
lack of air filters. Failure to follow this warning can lead to
premature furnace failure and/or vent failure which could
result in a fire hazard and/or bodily harm.
• The owner and/or the user is responsible of the following:
Always maintain the immediate surrounding of the furnace
free from combustible and highly flammables materials.The
furnace ambient air should not have an excessive dust
concentration and humidity. Never operate this central heating
appliance without an air filter.
• Before performing any service functions, unless operations
specifically require the power to be on, make sure all utilities
are turned “OFF” upstream of the appliance. Failure to comply
with this warning will cause a fire hazard and/or bodily
harm.
• It is strictly forbidden to use jumpers to simulate heat demand.
• Risk of electrical shock. Disconnect power before installation,
servicing, maintenance or field wiring. Replace all panels
before operating. Failure to do so can result in electrical
shock causing severe injuries or death.
• When performing installation, servicing or cleaning the unit,
it is recommended to wear safety glasses and gloves.
• To assure a proper performance of your furnace, we recommend
that you use high quality name brand thermostats.
• When applicable local regulation comprises more restrictive
installation and/or certification requirements, the aforementioned
requirements prevail on those of this document and the
installer agrees to conform to these at his own expenses.
• For your safety, do not store or use gasoline or other flammable
liquids and vapors in the vicinity of this unit or any other
appliance.
• These instructions are intended to be use by qualified personnel
who have been trained in installing this type of furnace.
Installation of this furnace by an unqualified person may
lead to equipment damage and/or hazardous condition
which may lead to bodily harm.
• All questions regarding the operation, maintenance or warranty
of this unit should be addressed to the company where this
product has been sold from.
CAUTION
• Never burn garbage or paper in the heating system and never leave rags or paper around the unit.
• Return air grilles and warm air registers must not be obstructed.
IMPORTANT: All local and national code requirements governing the electrical installation heating equipment, wiring and flue connections
must be followed. Some of the codes that may be applicable are :
ANSI/NFPA 70 NATIONAL ELECTRICAL CODE
CSA C22.1 CANADIAN ELECTRICAL CODE
Only the latest issues of the above codes should be used, and are available from either:
The National Fire Protection Agency
Batterymarch Park
The Canadian Standards Association
178 Rexdale Blvd.
or
Quincy, MA 02269
Rexdale, Ontario M9W 1R3
IMPORTANT: READ AND SAVE THESE INSTRUCTIONS.
30042432A
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GENERAL REQUIREMENTS AND SPECIFICATIONS (CONT’D)
240 VOLTS – SINGLE PHASE
TEMP. RISE @ 0.20 IN. W.C.
MODEL NO. KW
BTUH AMPS INCL. MOTOR
HP
1/3
1/3
1/3
1/3
1/3
1/3
BLOWER
°C
21
24
27
33
36
37
°F
70
25
81
91
97
99
*SPEED
RPM
814
814
814
814
814
814
21D10
21D15
21D18
21D20
21D23
21D25
10
15
34120
51180
61420
68240
76842
85003
46
67
MED-LOW
MED-LOW
MED-LOW
MED-LOW
MED-LOW
MED-LOW
18
77
10” x 8”
(254 mm x 203 mm)
20
86
22.5
25
94
107
12” x 8”
(304 mm x 203 mm)
21D27
27
92130
116
3/4
36
97
MED-HI
707
*FACTORY SETTINGS.
SUBJECT TO CHANGE WITHOUT NOTICE.
10” x 8” (254 mm x 203 mm) BLOWER
12” x 8” (304 x 203 mm) BLOWER
STATIC PRESSURE
(INCHES OF WATER COLUMN)
STATIC PRESSURE
(INCHES OF WATER COLUMN)
FLOW
RATE
FLOW
RATE
SPEED
SPEED
0.2
0.3
0.4
0.5
0.6
0.2
0.3
0.4
0.5
0.6
CFM
L/s
756
357
749
353
740
349
729
344
713
337
CFM
L/s
727
343
699
330
667
315
636
300
606
286
LOW**
LOW**
MED-LOW**
MED-HIGH
HIGH
CFM
L/s
1035
488
1018
480
997
470
971
458
935
441
CFM
L/s
912
431
897
423
878
414
853
402
823
388
MED-LOW
MED-HIGH
CFM
L/s
1177
556
1157
546
1132
534
1102
520
1063
502
CFM
L/s
1216
574
1200
566
1181
557
1157
546
1129
533
CFM
L/s
1301
614
1276
602
1247
588
1207
569
1145
540
CFM
L/s
1640
774
1601
755
1558
735
1513
714
1466
692
HIGH
WARNING:
**These speeds can only be run with heater off, for cooling/ventilation purposes only.
OPERATING OPTIONS
The furnace is shipped from the factory in a “Standard Heating
Mode” (all switches in the Down position). When the thermostat
calls for heat, the automatic controls will be activated and the
furnace turns “ON”.
As the furnace heats up, it automatically switches to a medium
speed when additional elements are activated by the electronic
control, if it was initially set to run at low speed. The timing of this
blower speed change will depend on whether COLD or MILD is
selected on the SEASON SELECT switch.
The blower will run at low speed or higher speed (as selected by
SPEED SELECTOR switch).
You may, however, change from the Standard Heating Mode by
using the controls built into your furnace.
HIGH
LOW
MILD
COLD
SPEED SELECTOR
SEASON SELECT
The SPEED SELECTOR switch is used to control the fan speed
(ventilation). Even if there is no call for heat, the ventilation can be
controlled by the thermostat; the fan speed is determined by this
switch.
During spring or fall, you may require less rapid response when
the thermostat calls for heat.
When MILD is selected, it takes more time to bring all the elements online.
When COLD is selected, the heating elements come online faster.
LOW – The blower motor will operate at low speed.
HIGH – The blower motor will operate at a higher speed.
MILD SEASON (First Stage)
Slow Response Sequence
COLD SEASON (Second Stage)
Rapid Response Sequence
Element 1 - Heat on instantly
Element 1 - Heat on instantly
Blower on after 3 seconds delay
Blower on after a 3 seconds delay
Elements 3 and 5 after 1 minute delay Elements 3 and 5 after 10 seconds delay
Element 2 after 2 minutes delay Element 2 after 20 seconds delay
Elements 4 and 6 after 3-minute delay Elements 4 and 6 after 30 seconds delay
NOTE: Elements 4, 5 and 6 only where applicable.
3
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INSTALLATION NOTES
1. COLD AIR RETURN
3. CONNECTING AND ADJUSTING
The duct can be attached to either side, rear or the bottom of
the furnace.
THE LOW VOLTAGE THERMOSTAT
(Use only class 1 wires inside furnace compartments.)
Attach thermostat wires to the low voltage terminal
connections located on the printed circuit board inside the
furnace. Follow the diagrams supplied with the thermostat. As
a general guide, remember that the R & W terminals control
single stage heating; the R &Y terminals control cooling. Single
stage cooling uses “Y/Y2” as first and only stage.
For side return there are four 1½” (38 mm) knockouts which
can be removed and used as an outline for cutting a 18” x 18”
(457 mm x 457 mm) return air opening in the furnace left or
right side. Mount the filter frame to the furnace over the opening
with the open side of the frame facing front. Then attach the
19” x 19” (483 mm x 483 mm) air duct to the flanges on the
filter frame. For bottom mounting, remove the screws holding
the bottom plate to the furnace, discard the bottom plate and
attach the filter frame to the bottom flanges with the open side
of the frame facing front.
Two-stage cooling uses “Y1” as first stage and “Y/Y2” as
second stage. Make sure the thermostat is levelled on the wall
and in appropriate location as per instructions supplied with the
thermostat.
CAUTION
2. ELECTRICAL WIRING - POWER SUPPLY
Before turning the furnace on, the heat anticipator in the
thermostat must be properly set to prevent its failure and to
assure comfortable, economical heating.
The furnaces are completely factory wired. From a separate
breaker, a two-wire plus ground supply wire is required. The
ground conductor must be firmly attached to the ground lug in
the furnace and the supply wires to the terminal block in the
furnace.
Because each installation is different an accurate reading of
the current draw should be made with an AC meter. Set the
meter at a 2 A range.
A. Set the anticipator at its highest setting.
B. Disconnect the “W1” thermostat wire from the furnace low
voltage terminal connections.
C. Connect the AC meter between the “W1” terminal on the
board and the loose “W1” wire.
D. Turn the thermostat up to start the furnace and allow it to
run, with all elements on, for three or four minutes.
E. Read the current draw on the meter and reset the anticipator
to match the meter reading.
NOTE: If a FK120 kit will be used to supply an air cleaner
and/or humidifier, a third (neutral) conductor must be
brought into the furnace.
!
WARNING
For all installations, we only recommend appropriate gauge
good quality copper wire(s). However, it is the electrician’s
responsibility to ensure that the wiring and connections are
compliant to the latest editions of the Canadian Electrical
Code and local codes.
FOR USE IN MOBILE HOMES
D Series furnaces models 21D10, 21D15, 21D18 and 21D20 are
certified for “L” -shape and “T”-shape shallow duct installation with
model FSB-1 sub-base in downflow applications when the supply
air ducts pass through the floor of the structure. Recommended
size of a floor opening: 14¼” x 14¼” (362 mm x 362 mm).The duct
system must be designed so that the external static pressure of
the system does not exceed the maximum external static pressure
of 0.50” W.C. (125 Pa).
SHALLOW DUCT AREA REQUIREMENTS
Duct Depth
4” (102 mm)
5” (127 mm)
6” (152 mm)
Duct Width
16” (406 mm)
13” (330 mm)
10” (254 mm)
4
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USING OPTIONAL EQUIPMENT
1. TWO-STAGE OR OUTDOOR THERMOSTAT
4. INTERLOCK CONNECTION
(The SEASON SELECT switch must be in the MILD position).
Follow the directions supplied with the two-stage or outdoor
thermostat in conjunction with the furnace wiring diagram.
When the electric furnace is used in combination with another
device (as for example, a wood burning furnace), it is
recommended to perform the connection by referring to the
wiring diagram below. The burning furnace thermostat will then
turn automatically on the blower in the electric furnace.
2. AIR CONDITIONING
Your furnace is equipped with all the controls required for the
addition of air conditioning (except the heat-cool thermostat).
External Request
Electric Furnace
Furnace
for Fan Activation
System
The evaporator coil may be installed by a local contractor in
sheet metal plenum of his own manufacture.The coil should be
located: Centered over the “chimney” of the furnace 4” (102 mm)
to 6” (152 mm) above the top of the furnace.
Thermostat
G
R
Relay
Furnace
NC
COM
Make sure no air is allowed to bypass the cooling coil during
cooling operation. If the discharge opening is a great deal larger
than the coil, and the ductwork is correspondingly larger than
the coil, you may want to use a bypass damper for heating.The
damper would be closed in summer, directing all air flow
through the coil. In winter the damper would be open to allow
air to bypass the coil.
24 VAC
Power Output
NO
R
G
Call for FAN
MAINTENANCE
MOTOR: The motor is lubricated for life and needs no oiling.
Typical air-conditioning field wiring connections are shown in
the following diagram:
FILTERS: Size is 20” x 20” x 1” (508 mm x 508 mm x 25 mm).
Should be inspected and replaced when dirty.
Ordinarily replacement is required twice per heating
season and, perhaps, a third time if continuous
blower operation is used.
THERMOSTAT
NOTE: Each element has an automatic reset thermal
cut-out which is set to open at 160°F (71°C). If it opens,
the element will be de-energized until the cut-out resets
itself. In addition to that, there are 2 manual reset thermal
cut-outs that open at 200°F (93°C). If any of them open,
a front panel needs to be removed so the cut-out can be
manually reset.
FURNACE
CONDENSER
!
WARNING
Cut 240 V supply before removing the front panel!
The reason for the failure should be investigated before
re-starting the furnace. The limit usually opens when
airflow is reduced because of blocked ductwork or very
dirty filters.
WIRING COLOR CODES
C
G
R
W1
W2
Y
WHITE
(BLUE
COMMON GREEN RED WHITE
YELLOW
OPTIONAL)
3. ELECTRONIC AIR CLEANERS AND/OR POWERED
FURNACE HUMIDIFIERS
These units operate at 120 V. Your 240 V furnace is designed
so that Model FK120 adaptor kit can be mounted inside the
furnace to supply the required 120 V. Instructions for mounting
and wiring are included with the kit.
5
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SERVICE PARTS
3
2
12
4
10
1
7
8
9
15
5
16
13
11
14
6
REPLACEMENT PARTS
KEY NO.
PART NO. DESCRIPTION
1
2
3
4
30270032
30030006
30030025
30280021
10941203
10941288
30390553
30270038
Automatic Limit
Season Select Switch
Speed Selector Switch
Thermostat Indicator Light
Motor 1/3 HP (21D10/15/18/23/25)
Motor 3/4 HP (21D27)
5
6
Blower Wheel 12” x 8” (305 mm x 203 mm)
Motor Capacitor (21D10/15/18/20/25)
Motor Capacitor (21D27)
Element Assembly 5000 W, 240 V
Element Assembly 4500 W, 240 V
20 A Relay
7
30271114
10940080
10940081
30274131
30274132
30280020
624663
30300022
30010010
10941149
10941221
624664
8
9
10
11
12
13
14
15
30 A Relay
Manual Reset Limit
Electronic Control (PC Board)
Transformer 240 V
Fiberglass Filter 20” x 20” x 1” (508 mm x 508 mm x 25 mm)
Service Blower Assembly for 21D10/15/18/20/23
Service Blower Assembly for 21D27
16
17*
18*
Daughterboard (21D23/25/27 only)
FK120
120 Volt Kit (optional, purchase separately)
* Item not shown.
6
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WIRING DIAGRAMS
!
WARNING
Risk of electrical shock. Disconnect power before installation, servicing, maintenance or field wiring. Replace all panels before
operating. Failure to do so can result in electrical shock causing severe injuries or death.
Open: 93.3°C (200°F)
MRHTL2
MRHTL1
Critical Characteristic
WHT
WHT
WHT
1. If any of the original wire, as
supplied, must be replaced,
use the same equivalent wire.
Wiring must comply with
applicable codes, ordinances
and regulations.
WHT
GRY
PNK
E
KC3
HTL
HEAT 3
BLK
RED
BLK
COM
NO
WHT
PNK
PNK
HEAT 3
24VDC
YEL
YEL
POWER
2. Field wiring must comply with
applicable codes, ordinances
and regulations. Use only
Class 1 wiring inside furnace
compartments.
P3-1 P3-2 P3-3 P3-4 P3-5 P3-6 P3-7
P3
F1
5 AMPS
BOARD POWER
SUPPLY
SEASON SELECT
HEAT INDICATOR
E
KC1
HEAT 1
HTL
PPL
RED
BLK
BLK
COM
NO
WHT
24 VAC
PPL
COMMON OUT
BLK
GRY
HEAT 1
GRY
24VDC
P2-8
Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C,
VW-1,12AWG;
CSA TEW 600V, 105°C,
FT1, 12AWG.
FUSED 24 VAC
POWER OUT
P2-7
P2-6
CALL FOR FAN.
PPL
CALL FOR COOL.
P2-5
P2-4
REVERSING VALVE
BLK
WHT
PPL
Low voltage wiring: same ratings
as high voltage except 18AWG.
CALL FOR HEAT 1
K7
P2-3
P2-2
L2
3
1
5
PNK
BLU
GRY
24VDC
VENTILATION SPEED
WHT
CALL FOR HEAT 2
CALL FOR COOL 1
RED
RED
LO RED
10 kW 240 VAC
Single phase
4
RED
RED
NC
YEL
FAN
MOTOR SPEED
P2-1
MED-LO
TB
COLOR
P2
ORG
BRN
6
2
YEL
P1
N
K2
G
HI
BLACK
BLUE
YELLOW
RED
K2
K1
BLU
RED
MED-HIGH
MED-LOW
LOW
BLK (HI)
ORG
BLK
BLK
RED
ORG
HI
BLU (MED-HI)
YEL (MED-LO)
RED (LO)
T
L1
Med-Hi
C
M
Class 2 Transformer
Pri: 240 V 60 Hz
Sec: 24 V 60 Hz 40 VA
BLK
BLK
Med-Lo
Lo
BLK
BLK
BRN
LEGEND
ORG
YEL
YEL
RED
BLK
C
F1
E
Capacitor
Fuse
Heating Element
Heating Element
Relay
KC
Open: 93.3°C (200°F)
MRHTL2
MRHTL1
WHT
WHT
WHT
K
Fan Relay
HTL
Auto-Reset
WHT
Thermal Protector
Manual Reset
Thermal Protector
Fan Motor
PNK
MRHTL
BRN
E
E
E
KC3
HTL
HTL
HTL
HEAT 3
BLK
GRY
RED
BLK
COM
NO
WHT
M
PNK
PNK
HEAT 3
HEAT 2
HEAT 1
24VDC
TB
T
HEAT
L1, L2
N
Terminal Block
Transformer Class 2
Heat
240V Line Supply
Neutral
YEL
YEL
POWER
KC2
HEAT 2
COM
RED
RED
BLK
BLK
NO
WHT
BLK
P3-1 P3-2 P3-3 P3-4 P3-5 P3-6 P3-7
P3
F1
5 AMPS
BRN
24VDC
BOARD POWER
SUPPLY
KC1
HEAT 1
SEASON SELECT
HEAT INDICATOR
BLK
COM
NO
WHT
PPL
PPL
24 VAC
COMMON OUT
BLK
GRY
For the use of a two-stage heat
thermostat or an outdoor
thermostat, connect between
W1 and W2. Make sure that the
Season Select switch
24VDC
P2-8
FUSED 24 VAC
POWER OUT
GRY
P2-7
P2-6
CALL FOR FAN.
PPL
BLK
CALL FOR COOL.
P2-5
P2-4
is set to the Mild Position.
REVERSING VALVE
WHT
PPL
CALL FOR HEAT 1
K7
P2-3
P2-2
L2
WIRING COLOR CODE
3
4
1
5
PNK
BLU
GRY
24VDC
VENTILATION SPEED
WHT
ORG
CALL FOR HEAT 2
CALL FOR COOL 1
RED
RED
RED
LO RED
BLK
BLU
BRN
GRN
GRY
ORG
PNK
PPL
RED
WHT
YEL
BLACK
BLUE
BROWN
GREEN
GREY
ORANGE
PINK
PURPLE
RED
15 kW 240 VAC
Single phase
RED
RED
NC
YEL
P2-1
MED-LO
TB
BLU
P2
YEL
6
2
P1
N
K2
G
RED
K2
K1
BLK (HI)
BRN
BRN
ORG
BLK
BLK
RED
ORG
HI
BLU (MED-HI)
YEL (MED-LO)
RED (LO)
T
L1
Med-Hi
C
M
Class 2 Transformer
Pri: 240 V 60 Hz
BLK
BLK
Med-Lo
Lo
BLK
BLK
BLK
Sec: 24 V 60 Hz 40 VA
WHITE
YELLOW
ORG
YEL
YEL
RED
BLK
7
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WIRING DIAGRAMS (CONT’D)
!
WARNING
Risk of electrical shock. Disconnect power before installation, servicing, maintenance or field wiring. Replace all panels before
operating. Failure to do so can result in electrical shock causing severe injuries or death.
Open: 93.3°C (200°F)
KC4
HEAT 4
BLK
HTL
HTL
E
MRHTL2
Critical Characteristic
MRHTL1
RED
RED
RED
BLK
WHT
WHT
WHT
COM
NO
WHT
BLK
PPL
PPL
HEAT 3
HEAT 4
1. If any of the original wire, as
supplied, must be replaced,
use the same equivalent wire.
Wiring must comply with
applicable codes, ordinances
and regulations.
2. Field wiring must comply with
applicable codes, ordinances
and regulations. Use only
Class 1 wiring inside furnace
compartments.
24VDC
WHT
PPL
E
KC3
PNK
BLK
BLK
COM
NO
WHT
BRN
GRY
PNK
PNK
HEAT 3
HEAT 2
HEAT 1
24VDC
YEL
YEL
POWER
E
E
KC2
HTL
HTL
HEAT 2
COM
BLK
BLK
NO
WHT
BLK
P3-4 P3-5
P3-7
P3-1 P3-2 P3-3
P3-6
P3
F1
5 AMPS
BRN
24VDC
BOARD POWER
SUPPLY
KC1
HEAT 1
SEASON SELECT
HEAT INDICATOR
RED
COM BLK
NO
WHT
PPL
PPL
24 VAC
COMMON OUT
BLK
GRY
24VDC
P2-8
FUSED 24 VAC
POWER OUT
GRY
Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C,
VW-1,12AWG;
CSA TEW 600V, 105°C,
FT1, 12AWG.
P2-7
P2-6
CALL FOR FAN.
PPL
BLK
CALL FOR COOL.
P2-5
P2-4
REVERSING VALVE
WHT
PPL
CALL FOR HEAT 1
K7
Low voltage wiring: same ratings
as high voltage except 18AWG.
P2-3
P2-2
L2
3
4
1
5
PNK
BLU
GRY
24VDC
VENTILATION SPEED
CALL FOR HEAT 2
CALL FOR COOL 1
RED
RED
RED
RED
LO RED
18/20 kW 240 VAC
Single phase
RED
RED
NC
YEL
P2-1
MED-LO
TB
BLU
FAN
P2
COLOR
ORG
6
2
YEL
P1
MOTOR SPEED
N
K2
G
RED
K2
K1
HI
BLACK
BLUE
YELLOW
RED
BLK (HI)
MED-HIGH
MED-LOW
LOW
BRN
BRN
ORG
BLK
BLK
RED
ORG
HI
Med-Hi
BLU (MED-HI)
YEL (MED-LO)
RED (LO)
T
L1
C
M
Class 2 Transformer
Pri: 240 V 60 Hz
BLK
BLK
BLK
BLK
BLK
BLK
Med-Lo
Lo
Sec: 24 V 60 Hz 40 VA
BLK
ORG
YEL
YEL
RED
BLK
LEGEND
C
F1
E
Capacitor
Fuse
Heating Element
Heating Element
Relay
WHT
PNK
RLY PWR2
HEAT5
HEAT6
KC
P2-3
KC5
HEAT 5
E
HTL
Open / ouverture: 93.3°C (200°F)
COM
RED
NO
P2-2
P2-1
BLK
BLK
HEAT 5
MRHTL2
MRHTL1
K
Fan Relay
PNK
PPL
PNK
GRY
WHT
WHT
YEL
HEAT5 IN
HEAT6 IN
24VDC
Heater
Logic
P1-4
P1-3
P1-2
P1-1
HTL
Auto-Reset
KC4
24V
HEAT 4
HTL
HTL
E
regulated
Thermal Protector
Manual Reset
Thermal Protector
Fan Motor
RED
RED
RED
BLK
COM
NO
BLK
MRHTL
WHT
PPL
PPL
HEAT 3
GRY
HEAT 4
24VDC
PNK
PNK
PNK
PPL
E
KC3
M
BLK
BLK
COM
NO
WHT
BRN
GRY
TB
T
HEAT
L1, L2
N
Terminal Block
Transformer Class 2
Heat
240V Line Supply
Neutral
WHT
POWER
PNK
PNK
HEAT 3
HEAT 2
HEAT 1
24VDC
WHT
YEL
E
E
KC2
HTL
HTL
HEAT 2
COM
BLK
BLK
NO
WHT
BLK
P3-1 P3-2 P3-3 P3-4 P3-5 P3-6 P3-7
P3
F1
5 AMPS
BRN
24VDC
BOARD POWER
SUPPLY
SEASON SELECT
HEAT INDICATOR
KC1
HEAT 1
PPL
RED
COM BLK
NO
24 VAC
COMMON OUT
PPL
For the use of a two-stage heat
thermostat or an outdoor
thermostat, connect between
W1 and W2. Make sure that the
Season Select switch
BLK
WHT
GRY
GRY
24VDC
P2-8
FUSED 24 VAC
POWER OUT
P2-7
P2-6
CALL FOR FAN.
PPL
BLK
CALL FOR COOL.
P2-5
P2-4
is set to the Mild Position.
REVERSING VALVE
WHT
PPL
CALL FOR HEAT 1
K7
P2-3
P2-2
L2
WIRING COLOR CODE
3
4
1
5
PNK
BLU
GRY
24VDC
VENTILATION SPEED
RED
CALL FOR HEAT 2
CALL FOR COOL 1
RED
RED
LO RED
RED
RED
RED
23/25 kW 240 VAC
Single phase
BLK
BLU
BRN
GRN
GRY
ORG
PNK
PPL
RED
WHT
YEL
BLACK
BLUE
BROWN
GREEN
GREY
ORANGE
PINK
PURPLE
RED
NC
YEL
RED
P2-1
MED-LO
TB
BLU
P2
ORG
6
2
YEL
P1
N
K2
G
RED
K2
K1
BLK (HI)
BRN
BRN
ORG
BLK
BLK
RED
ORG
HI
Med-Hi
BLU (MED-HI)
YEL (MED-LO)
RED (LO)
T
L1
C
M
Class 2 Transformer
Pri: 240 V 60 Hz
BLK
BLK
BLK
BLK
Med-Lo
Lo
BLK
BLK
BLK
Sec: 24 V 60 Hz 40 VA
ORG
YEL
YEL
RED
BLK
WHITE
YELLOW
8
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WIRING DIAGRAMS (CONT’D)
!
WARNING
Risk of electrical shock. Disconnect power before installation, servicing, maintenance or field wiring. Replace all panels before
operating. Failure to do so can result in electrical shock causing severe injuries or death.
WHT
PNK
PPL
RLY PWR2
HEAT5
HEAT6
P2-3
P2-2
P2-1
KC6
HEAT 6
E
HTL
BLK
Open: 93.3°C (200°F)
COM
RED
NO
BLK
WHT
WHT
HEAT 6
HEAT 5
MRHTL2
MRHTL1
PNK
PPL
PNK
WHT
WHT
YEL
HEAT5 IN
HEAT6 IN
24VDC
Heater
Logic
P1-4
P1-3
P1-2
P1-1
KC5
HEAT 5
24V
regulated
E
GRY
HTL
COM
RED
RED
NO
BLK
BLK
WHT
24VDC
GRY
PNK
PNK
PNK
KC4
PPL
HEAT 4
HTL
HTL
E
BLK
BLK
COM
NO
BLK
BRN
GRY
WHT
PPL
PPL
HEAT 4
24VDC
WHT
POWER
WHT
YEL
E
KC3
HEAT 3
RED
RED
RED
BLK
BLK
COM
NO
P3-1 P3-2 P3-3 P3-4 P3-5
P3-7
P3-6
P3
WHT
PNK
PNK
HEAT 3
HEAT 2
HEAT 1
F1
5 AMPS
24VDC
BOARD POWER
SUPPLY
E
E
KC2
HTL
HTL
HEAT 2
PPL
PPL
SEASON SELECT
COM
BLK
BLK
NO
BLK
24 VAC
COMMON OUT
WHT
BRN
24VDC
BLK
P2-8
FUSED 24 VAC
POWER OUT
GRY
KC1
HEAT 1
P2-7
P2-6
BLK
COM
NO
CALL FOR FAN
WHT
GRY
24VDC
CALL FOR COOL.
HEAT INDICATOR
PPL
BLK
P2-5
P2-4
REVERSING VALVE
CALL FOR HEAT 1
PPL
WHT
K7
P2-3
P2-2
L2
N
3
1
5
PNK
BLU
GRY
24VDC
VENTILATION SPEED
LO RED
WHT
CALL FOR HEAT 2
CALL FOR COOL 1
RED
RED
RED
RED
RED
RED
RED
RED
27 kW 240 VAC
Single phase
4
NC
YEL
P2-1
MED-LO
P2
ORG
BRN
6
2
BLU
P1
K2
G
K2
K1
TB
BLK (HI)
ORG
RED
ORG
HI
Med-Hi
BLK
BLK
BLK
BLU (MED-HI)
YEL (MED-LO)
RED (LO)
T
L1
C
Class 2 Transformer
Pri: 240 V 60 Hz
M
BLK
BLK
BLK
BLK
Med-Lo
Lo
BLK
BLK
Sec: 24 V 60 Hz 40 VA
BRN
BLK
YEL
YEL
BLK
BLK
ORG
LEGEND
Critical Characteristic
C
F1
E
Capacitor
Fuse
Heating Element
Heating Element
Relay
1. If any of the original wire, as supplied, must be
replaced, use the same equivalent wire. Wiring
must comply with applicable codes, ordinances
and regulations.
WIRING COLOR CODE
BLK
BLU
BRN
GRN
GRY
ORG
PNK
PPL
RED
WHT
YEL
BLACK
BLUE
BROWN
GREEN
GREY
ORANGE
PINK
PURPLE
RED
KC
K
HTL
Fan Relay
Auto-Reset
2. Field wiring must comply with applicable codes,
ordinances and regulations. Use only Class 1
wiring inside furnace compartments.
Thermal Protector
Manual Reset
Thermal Protector
Fan Motor
Terminal Block
Transformer Class 2
Heat
MRHTL
Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C, VW-1,12AWG;
CSA TEW 600V, 105°C, FT1, 12AWG.
M
TB
T
HEAT
L1, L2
N
WHITE
YELLOW
Low voltage wiring: same ratings as high voltage
except 18AWG.
240V Line Supply
Neutral
FAN MOTOR SPEED COLOR
HI
BLACK
BLUE
YELLOW
RED
For the use of a two-stage heat thermostat or
an outdoor thermostat, connect between W1
and W2. Make sure that the Season Select
switch is set to the Mild Position.
MED-HIGH
MED-LOW
LOW
9
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TROUBLESHOOTING
The first step in identifying an operational problem is to determine
whether the fault is in the furnace or in the thermostat and/or its
connecting wiring.
1. If the furnace will not start:
Turn the thermostat to its highest setting. If the light goes on,
the thermostat has closed, so the fault is in the furnace. If the
light does not go on, the thermostat or its connecting wiring is
the problem.
To help make this determination, the furnace is equipped with a
“Thermostat ON” diagnostic light. If the light is “ON”, it indicates
the thermostat has closed and is calling for heat; the blower
should be running. If the light is “OFF”, the furnace should not be
operating.
2. If the furnace will not turn off:
Turn the thermostat to its lowest setting. If the light goes off and
the furnace continues to run, the thermostat has opened properly
and the fault is in the furnace. If the light stays on, the fault is
in the thermostat or its connecting wiring.
After the fault area is isolated by use of the diagnostic light, a check
of the following components can be made more efficiently.
PROBLEM
POSSIBLE DEFECTIVE PARTS OR COMPONENTS
• Thermostat
1. The furnace will not turn on
• Circuit breaker or fuse is open
• Motor or capacitor
• SPEED SELECTOR switch (open contact)
• Electronic control
• Transformer
2. Motor runs continuously
• Thermostat wires incorrectly attached to furnace
• Motor or capacitor
• SPEED SELECTOR switch (open contact)
• Electronic control
3. Elements on, but motor does not run
4. Motor going on and off in short cycles
(or in too long cycles)
• Heat anticipator in thermostat incorrectly set
or may be defective
5. Must set thermostat much higher (or lower)
than the desired house temperature
• Thermostat is not leveled or out of calibration
• One or more defective elements or relays
• SEASON SELECT switch in MILD position
• Safety limits opening because duct obstruction
or dirty filters are restricting air flow
6. Not enough heat
• Defective or incorrectly wired two-stage
or outdoor thermostat
• Lack of enough cold air returns in house
7. Two-stage or outdoor thermostat not operating properly • SEASON SELECT switch not in MILD position
SIXTY-MONTH LIMITED WARRANTY FOR NORTRON PRODUCTS
Broan-NuTone Canada (Broan-NuTone) warrants to the original consumer purchaser of Notron products that such products will be free from defects in
materials or workmanship for a period of sixty (60) months from the date of original purchase. THERE ARE NO OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
During this sixty-month period, Broan-NuTone will, at its option, repair or replace without charge, any product or part which is found to be defective under
normal use and service. This product or part should be shipped prepaid by the customer to the company factory or the nearest authorized service center.
THIS WARRANTY DOES NOT EXTEND TO FILTERS, FURNACE KITS SOLD SEPARATELY, DUCTS, AND ACCESSORIES FOR DUCTING. This warranty
does not cover (a) normal maintenance and service or (b) any products or parts which have been subject to misuse, negligence, accident, improper
maintenance or repair (other than by Broan-NuTone), faulty installation or installation contrary to recommended installation instructions. Broan-NuTone
does not accept any responsibility for transportation of repaired part or replaced product mentioned above and for reinstallation costs.
The duration of any implied warranty is limited to the sixty-month period as specified for the express warranty. Some jurisdictions do not allow limitation
on how long an implied warranty lasts, so the above limitation may not apply to you.
BROAN-NUTONE’S OBLIGATION TO REPAIR OR REPLACE, AT BROAN-NUTONE’S OPTION, SHALL BE THE PURCHASER’S SOLE AND
EXCLUSIVE REMEDY UNDER THIS WARRANTY. BROAN-NUTONE SHALL NOT BE LIABLE FOR INCIDENTAL, CONSEQUENTIAL OR SPECIAL
DAMAGES ARISING OUT OF OR IN CONNECTION WITH PRODUCT USE OR PERFORMANCE. Some jurisdictions do not allow the exclusion
or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights, which vary from province to another.This warranty supersedes all prior
warranties, and applies only in Canada territorial limits.
To qualify for warranty service, you must (a) notify Broan-NuTone at the address or telephone number stated below, (b) give the model number and part
identification and (c) describe the nature of any defect in the product or part. At the time of requesting warranty service, you must present evidence of the
original purchase date.
10
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