Broan Furnace 30042432A User Manual

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  
 
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
 
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 electricians  
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
 
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
 
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
 
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
 
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
 
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
 
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.  
Broan-NuTone Canada; 1140 Tristar Drive, Mississauga, ON L5T 1H9 www.broan.ca 877-896-1119  
10  
 

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