Broan Furnace 30042432A Users Manual D Series Nortron Electric Furnaces Installation (30042432A)

D SERIES ELECTRIC FURNACE to the manual 7d4b5b0e-7b32-459a-8ac5-45eaa856e8f5

2015-02-02

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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
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.
• 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.
• 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.

• This furnace is not watertight and is not designed for outdoor
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.
• 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.
• 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
The Canadian Standards Association
or
Batterymarch Park
178 Rexdale Blvd.
Quincy, MA 02269
Rexdale, Ontario M9W 1R3

IMPORTANT: READ AND SAVE THESE INSTRUCTIONS.
30042432A

INSTALLATION AND OPERATING INSTRUCTIONS
This furnace has been designed and manufactured to give the
most reliable performance possible. Each unit has been given a
running inspection before shipment to assure that every component
is operating efficiently.

The safe and dependable operation of the furnace depends upon
proper installation and compliance with all national and local
codes and standards.

TOP VIEW
1½”
(38 mm)
WIRING KO’S VALUES
17” x 17”

A = 1” (25 mm)
B = 1/4” (6 mm) & 1¼” (32 mm)
C = 1/2” (13 mm) & 1½” (38 mm)

(432 mm x 432 mm)

1½”
20”
(508 mm) DISCHARGE (38 mm)

FRONT VIEW

RIGHT SIDE VIEW

20”
(508 mm)

39”
(991 mm)

REAR VIEW

LEFT SIDE VIEW

1”
(25 mm)

FILTER FRAME
(EITHER SIDE, REAR
OR BOTTOM)

1½” x 1½” KO
(38 mm x 38 mm)

WIRING KO’S
A
B
C

WIRING KO’S
C

18” x 18”

(457 mm x 457 mm)

RETURN

1½” x 1½” KO
(38 mm x 38 mm)

RETURN

1½” x 1½” KO
(38 mm x 38 mm)

RETURN

FK0003A

UNIT CERTIFICATION
This furnace is CSA certified.

GENERAL REQUIREMENTS AND SPECIFICATIONS
CAUTION
This unit must be installed in a dry place, in a non-corrosive, well-ventilated environment, without excessive dust. The ambient
temperature must be over 10°C and under 27°C. If the ambient temperature is 10°C or less, the plenum must be insulated on
10 ft linear minimum length.
3. INSTALLATION CLEARANCES – As shipped from the factory,
each unit is approved for “zero inch” clearance. If additional
clearance is required, it will be indicated on the data label
attached to the furnace.
4. TEMPERATURE RISE – Furnaces are shipped to operate at
0.20” W.C. (50 Pa) external static pressure. They are certified
for operation up to 0.50” W.C. (125 Pa). Check the following
page for temperature rise table on specification chart and, if
necessary, adjust the unit to match.
5. SERVICE CLEARANCE – Units are serviced from the FRONT.
Leave at least 24” (610 mm) clearance in front of the door.

1. LOCATION – The furnace should be centrally located to the
heating area.
2. POSITIONS – It can be installed for vertical, horizontal or
downflow operation. When installed horizontally, the furnace
should be positioned such as the door will not end up being on
the top. The door should be on the side of the furnace, to
ensure that the motor bearings are in their designed position.
In vertical downflow installations, use only “L”- or “T”-shaped
plenum with no openings or registers directly below furnace.

GENERAL REQUIREMENTS AND SPECIFICATIONS (CONT’D)
240 VOLTS – SINGLE PHASE

TEMP. RISE @ 0.20 IN. W.C.

MODEL NO.

BTUH

AMPS INCL. MOTOR

°C

°F

*SPEED

RPM

21D10

34120

1/3

MED-LOW

814

21D15

51180

1/3

MED-LOW

814

21D18

61420

1/3

MED-LOW

814

21D20

68240

1/3

MED-LOW

814

21D23

22.5

76842

1/3

MED-LOW

814

21D25

85003

107

1/3

MED-LOW

814

MED-HI

707

21D27

92130

116

BLOWER

10” x 8”
(254 mm x 203 mm)

12” x 8”
(304 mm x 203 mm)

3/4

*FACTORY SETTINGS.
SUBJECT TO CHANGE WITHOUT NOTICE.

12” x 8” (304 x 203 mm) BLOWER

10” x 8” (254 mm x 203 mm) BLOWER
STATIC PRESSURE
(INCHES OF WATER COLUMN)

STATIC PRESSURE
(INCHES OF WATER COLUMN)

SPEED

FLOW
RATE

0.2

0.3

0.4

0.5

0.6

713
337

LOW**

CFM
L/s

727
343

699
330

667
315

636
300

606
286

971
458

935
441

MED-LOW**

CFM
L/s

912
431

897
423

878
414

853
402

823
388

1132
534

1102
520

1063
502

MED-HIGH

CFM
L/s

1216
574

1200
566

1181
557

1157
546

1129
533

1247
588

1207
569

1145
540

HIGH

CFM
L/s

1640
774

1601
755

1558
735

1513
714

1466
692

SPEED

FLOW
RATE

0.2

0.3

0.4

0.5

0.6

LOW**

CFM
L/s

756
357

749
353

740
349

729
344

MED-LOW

CFM
L/s

1035
488

1018
480

997
470

MED-HIGH

CFM
L/s

1177
556

1157
546

HIGH

CFM
L/s

1301
614

1276
602

WARNING:
**These speeds can only be run with heater off, for cooling/ventilation purposes only.

OPERATING OPTIONS
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 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”.
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

MILD

LOW

COLD

SPEED SELECTOR

SEASON SELECT

During spring or fall, you may require less rapid response when
The SPEED SELECTOR switch is used to control the fan speed
the thermostat calls for heat.
(ventilation). Even if there is no call for heat, the ventilation can be
controlled by the thermostat; the fan speed is determined by this
When MILD is selected, it takes more time to bring all the elements online.
switch.
When COLD is selected, the heating elements come online faster.
LOW – The blower motor will operate at low speed.
MILD SEASON (First Stage)
COLD SEASON (Second Stage)
HIGH – The blower motor will operate at a higher speed.
Slow Response Sequence
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
The duct can be attached to either side, rear or the bottom of
the furnace.
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.

3. CONNECTING AND ADJUSTING
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.
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
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.
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.

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.
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.

! 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
Duct Width
4” (102 mm)
16” (406 mm)
5” (127 mm)
13” (330 mm)
6” (152 mm)
10” (254 mm)

USING OPTIONAL EQUIPMENT
1. TWO-STAGE OR OUTDOOR THERMOSTAT
(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.

4. INTERLOCK CONNECTION
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).
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.
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.

External Request
for Fan Activation

R
Furnace

NC
COM

24 VAC
Power Output

Call for FAN

MAINTENANCE
MOTOR: The motor is lubricated for life and needs no oiling.
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.
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.

Typical air-conditioning field wiring connections are shown in
the following diagram:
THERMOSTAT

FURNACE

Relay

Electric Furnace
System

Furnace
Thermostat

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.

FE0002A

WIRING COLOR CODES
C

COMMON GREEN

RED WHITE

WHITE
YELLOW
(BLUE
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.

SERVICE PARTS

2
4
10
1
7
8

5
16

REPLACEMENT PARTS
KEY NO.

PART NO.

1
2
3
4

30270032
30030006
30030025
30280021
10941203
10941288
30390553
30270038

5
6
7

30271114
10940080
10940081
30274131
30274132
30280020
624663
30300022
30010010
10941149
16
10941221
17*
624664
18*
FK120
* Item not shown.
8
9
10
11
12
13
14
15

DESCRIPTION
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)
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
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
Daughterboard (21D23/25/27 only)
120 Volt Kit (optional, purchase separately)

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)
MRHTL1

WHT

MRHTL2

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.

WHT
PNK

HEAT 3

PNK
POWER

P3-3 P3-4 P3-5 P3-6 P3-7

P3-1 P3-2

HTL

HEAT 1

KC1

COM

SEASON SELECT

WHT

PPL

BLK
GRY

24VDC

F1
5 AMPS

BOARD POWER
SUPPLY

PPL
HEAT 1

BLK

GRY

P2-8

24 VAC
COMMON OUT

BLK

YEL

RED

YEL
24 VAC

24VDC

VOUT

PNK

WHT

GND

HEAT 3

GRY

BLK

HEAT 4

COM

HEAT 3

KC3
BLK

HEAT 2

HEAT 1

HTL

RED

FUSED 24 VAC
POWER OUT

P2-7
CALL FOR FAN.

Y/Y2

CALL FOR COOL.

REVERSING VALVE

P2-6

PPL

HEAT INDICATOR

CALL FOR HEAT 1

P2-5
BLK
WHT
K7

P2-3
GRY

VENTILATION SPEED
LO RED

P2-2

10 kW 240 VAC
Single phase

BLU
YEL

P2-1

MED-LO
YEL

BLK
BLK

ORG

VSPOWER

XFMR

FAN

BLK

ORG

RED

BLU (MED-HI)

YEL (MED-LO)

Class 2 Transformer
Pri: 240 V 60 Hz
Sec: 24 V 60 Hz 40 VA

Med-Hi
Med-Lo

BLK

RED

BLK (HI)

BRN

HEAT

BLU

COOL

L2COM

CALL FOR COOL 1

ORG

CALL FOR HEAT 2

L2COM2

RED
RED

PNK

RED

24VDC

3
WHT

L2
RED

P2-4

PPL

BRN

RED (LO)

ORG

RED

YEL

BLK

YEL

Critical Characteristic

WHT

Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C,
VW-1,12AWG;
CSA TEW 600V, 105°C,
FT1, 12AWG.
Low voltage wiring: same ratings
as high voltage except 18AWG.
FAN
MOTOR SPEED
HI
MED-HIGH
MED-LOW
LOW

WHT

MRHTL2

C
F1
E
KC
WHT

K
HTL

WHT

MRHTL

PNK

HTL

WHT

HEAT 1

KC1

COM

WHT

F1
5 AMPS

SEASON SELECT

BLK

PPL
BLK

PPL

GRY

24VDC

BOARD POWER
SUPPLY

24 VAC
COMMON OUT

BLK
HEAT 1

P3-3 P3-4 P3-5 P3-6 P3-7

P3-1 P3-2

BRN

24VDC

BLK

RED

COM

HEAT 2

POWER

HEAT 2

KC2
BLK

M
TB
T
HEAT
L1, L2
N

YEL

YEL
24 VAC

HTL

RED

GND

24VDC

VOUT

PNK

WHT

HEAT 4

GRY

BLK

HEAT 3

COM

HEAT 3

BRN

HEAT 3

KC3
BLK

HEAT 2

HEAT 1

HTL

RED

FUSED 24 VAC
POWER OUT

P2-8

GRY

P2-7
CALL FOR FAN.

Y/Y2

CALL FOR COOL.

REVERSING VALVE

P2-6
PPL

HEAT INDICATOR

CALL FOR HEAT 1

P2-5
BLK
WHT

P2-3
GRY

VENTILATION SPEED
LO RED

P2-2

15 kW 240 VAC
Single phase

BLU
YEL

P2-1

MED-LO
2

YEL

C
BLK
BLK
BLK

BLU (MED-HI)

XFMR

FAN

BLK

RED

CALL FOR COOL 1

ORG

Med-Hi
Med-Lo
Lo

BRN

ORG

BLK (HI)

BRN

RED

COOL

BLU

HEAT

BLK
BLK

TB
L2COM

ORG

VSPOWER

Class 2 Transformer
Pri: 240 V 60 Hz
Sec: 24 V 60 Hz 40 VA

YEL (MED-LO)
RED (LO)

ORG

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.
WIRING COLOR CODE

CALL FOR HEAT 2

L2COM2

PNK

RED
RED

24VDC

3
WHT

Capacitor
Fuse
Heating Element
Heating Element
Relay
Fan Relay
Auto-Reset
Thermal Protector
Manual Reset
Thermal Protector
Fan Motor
Terminal Block
Transformer Class 2
Heat
240V Line Supply
Neutral

P2-4

L2
RED
RED
RED

PPL
K7

BLACK
BLUE
YELLOW
RED
LEGEND

Open: 93.3°C (200°F)
MRHTL1

WHT

COLOR

RED

YEL

BLK

YEL

BLK
BLU
BRN
GRN
GRY
ORG
PNK
PPL
RED
WHT
YEL

BLACK
BLUE
BROWN
GREEN
GREY
ORANGE
PINK
PURPLE
RED
WHITE
YELLOW

WIRING DIAGRAMS (CONT’D)
!

WARNING

RED

HEAT 4

KC4
BLK

BLK

WHT

HEAT 4

BLK

COM

PPL

24VDC

MRHTL1

WHT

MRHTL2

WHT

PPL

HTL

RED

E
BLK

PPL

HEAT 3

KC3

PNK

BLK

COM

BRN

BLK
HEAT 2

HTL

VOUT

HEAT 4

GND

F1
5 AMPS

BOARD POWER
SUPPLY

SEASON SELECT

PPL

BLK

P2-8

GRY

24 VAC
COMMON OUT
FUSED 24 VAC
POWER OUT

PPL

GRY

24VDC

WHT

P3-3 P3-4 P3-5 P3-6 P3-7

P3-1 P3-2

BLK

COM

HEAT 1

BLK

HEAT 1

KC1
BLK

YEL

BRN

24VDC

YEL

RED

COM

WHT

POWER

HEAT 2

KC2

24 VAC

HEAT 2

24VDC

PNK

HTL

RED

HEAT 1

PNK

WHT

HEAT 3

GRY
HEAT 3

CALL FOR FAN.

P2-7
HEAT INDICATOR

P2-2

18/20 kW 240 VAC
Single phase

BLU
YEL

P2-1

C
BLK
BLK
BLK
BLK

BLK

ORG

BLU (MED-HI)

BLK

CALL FOR COOL 1

RED

ORG

Med-Hi

BRN

Class 2 Transformer
Pri: 240 V 60 Hz
Sec: 24 V 60 Hz 40 VA

YEL (MED-LO)

Med-Lo

RED (LO)

ORG

WHT
PNK

HEAT 5

KC5

COM

BLK

P2-3
P2-2
P2-1

HEAT 5

HTL

RED

PNK

24VDC

BLK

HEAT 4

P1-3
P1-2

GRY

BLK

COM

WHT

PPL
PNK

HEAT 4

KC4

P1-4

P1-1

RLY PWR2
HEAT5
HEAT6
HEAT5 IN
HEAT6 IN

BRN

HEAT 2

HTL

RED

COM

WHT

P3-1 P3-2

HEAT 1

KC1
BLK

BLK

P3-4 P3-5 P3-6

P3-7

P3-3

COM

SEASON SELECT

F1
5 AMPS

PPL

24VDC

BLK

GRY

24 VAC
COMMON OUT

BLK
GRY

YEL

WHT

BOARD POWER
SUPPLY

PPL
HEAT 1

WHT

BRN

24VDC

POWER

HEAT 2

KC2
BLK

GND

RED

GRY
VOUT

WHT

24VDC

M
TB
T
HEAT
L1, L2
N

PNK

BLK

PNK
PNK

HTL

FUSED 24 VAC
POWER OUT

P2-8
P2-7

P2-3
GRY

VENTILATION SPEED
LO RED

23/25 kW 240 VAC
Single phase

BLU
YEL
MED-LO

YEL

BLU (MED-HI)

ORG

BLK

XFMR

FAN

BLK

RED

CALL FOR COOL 1

ORG

Med-Hi
Med-Lo

BLK
BLK
BLK

COOL

BLK (HI)

BRN

RED

HEAT

K2
BLU

BLK
BLK
BLK
BLK

CALL FOR HEAT 2

L2COM2

L2COM

ORG

P2-1

N
G

P2-2

PNK

VSPOWER

24VDC

BRN

Class 2 Transformer
Pri: 240 V 60 Hz
Sec: 24 V 60 Hz 40 VA

YEL (MED-LO)
RED (LO)

ORG

Capacitor
Fuse
Heating Element
Heating Element
Relay
Fan Relay
Auto-Reset
Thermal Protector
Manual Reset
Thermal Protector
Fan Motor
Terminal Block
Transformer Class 2
Heat
240V Line Supply
Neutral

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.

P2-4

RED

PPL
K7

RED
RED
RED
RED

CALL FOR HEAT 1

P2-5

WHT

REVERSING VALVE

BLK

CALL FOR FAN.
CALL FOR COOL.

P2-6

Y/Y2

PPL

HEAT INDICATOR

RED
RED

K
HTL
MRHTL

GRY

HEAT 3

COM

WHT

YEL

PNK

HEAT 3

KC3
BLK
HEAT 3

MRHTL2

PPL

HEAT 2

WHT

PNK

HEAT 1

HTL

MRHTL1

BLACK
BLUE
YELLOW
RED
LEGEND

24V
regulated

PPL
RED

YEL

Open / ouverture: 93.3°C (200°F)
WHT

Heater
Logic

PPL

24VDC

YEL

BLK

24 VAC

RED

COLOR

HI
MED-HIGH
MED-LOW
LOW

C
F1
E
KC

HEAT 4

HTL

RED

Low voltage wiring: same ratings
as high voltage except 18AWG.
FAN
MOTOR SPEED

P1
L2COM2

XFMR

BLK (HI)

BRN

BLK
BLK

RED

FAN

BLU

HEAT

COOL

L2COM

YEL

VSPOWER

ORG

CALL FOR HEAT 2

GRY

VENTILATION SPEED
LO RED

MED-LO

CALL FOR HEAT 1

P2-3
W2

PNK

RED
RED

24VDC

Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C,
VW-1,12AWG;
CSA TEW 600V, 105°C,
FT1, 12AWG.

P2-4

PPL
K7

WHT

RED
RED
RED
RED

CALL FOR COOL.
REVERSING VALVE

P2-5

BLK

Y/Y2

P2-6

PPL

Critical Characteristic

WHT

RED

YEL

BLK

YEL

WIRING COLOR CODE
BLK
BLU
BRN
GRN
GRY
ORG
PNK
PPL
RED
WHT
YEL

BLACK
BLUE
BROWN
GREEN
GREY
ORANGE
PINK
PURPLE
RED
WHITE
YELLOW

WIRING DIAGRAMS (CONT’D)
!

WARNING

RED

HEAT 6

KC6

WHT
PNK
PPL

BLK

COM

BLK

WHT

HEAT 6

HTL

KC5

P2-1

HEAT5 IN
HEAT6 IN

P1-4

PPL
PNK

HEAT 5
COM

BLK

P2-2

PNK

24VDC

WHT

RED

RLY PWR2
HEAT5
HEAT6

P2-3

P1-3

WHT

Heater
Logic

MRHTL2

WHT

YEL

24V
regulated

P1-2

GRY

BLK

Open: 93.3°C (200°F)
MRHTL1

P1-1

WHT

HEAT 5

GRY

24VDC

PNK
BLK

BLK

HEAT 4

BLK

COM

PPL
PNK
BRN

BLK

POWER

HEAT 3

KC3

BLK

COM

P3-3 P3-4 P3-5 P3-6 P3-7

P3-1 P3-2
HEAT 3

HTL

HEAT 2

KC2

COM

PPL

SEASON SELECT

PPL
BRN
BLK

GRY

HTL

HEAT INDICATOR

PPL

WHT
3
WHT

RED
RED
RED
RED

PNK

BLU

P2-2

27 kW 240 VAC
Single phase

P2-1

MED-LO
2

BLU

BLK
BLK
BLK

C
BLK
BLK
BLK
BLK

XFMR

BLK

FAN

ORG

BLK (HI)

BRN

COOL

HEAT

BLU (MED-HI)

BLK

L2COM

ORG

P2
VSPOWER

BRN

BLK

RED

Class 2 Transformer
Pri: 240 V 60 Hz
Sec: 24 V 60 Hz 40 VA

RED (LO)

ORG

LEGEND
Critical Characteristic

2. Field wiring must comply with applicable codes,
ordinances and regulations. Use only Class 1
wiring inside furnace compartments.
Line voltage wiring:
UL AWM 1015/1230, 600V, 105°C, VW-1,12AWG;
CSA TEW 600V, 105°C, FT1, 12AWG.

WIRING COLOR CODE
BLK
BLU
BRN
GRN
GRY
ORG
PNK
PPL
RED
WHT
YEL

BLACK
BLUE
BROWN
GREEN
GREY
ORANGE
PINK
PURPLE
RED
WHITE
YELLOW

Low voltage wiring: same ratings as high voltage
except 18AWG.
FAN MOTOR SPEED COLOR
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.

ORG

YEL (MED-LO)

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.

CALL FOR COOL 1

Med-Hi
Med-Lo

CALL FOR HEAT 2

P2-3
GRY

VENTILATION SPEED
LO RED
YEL

CALL FOR HEAT 1

P2-4

PPL

K7
24VDC

REVERSING VALVE

P2-5

BLK

CALL FOR COOL.

24VDC

CALL FOR FAN

P2-6

GRY

WHT

HEAT 1

P2-7

BLK

COM

FUSED 24 VAC
POWER OUT

Y/Y2

BLK

P2-8

HEAT 1

KC1

RED

24 VAC
COMMON OUT

L2COM2

24VDC

WHT

HEAT 2

BLK

BOARD POWER
SUPPLY

BLK

F1
5 AMPS

24VDC

PNK
RED

PNK

WHT

YEL

WHT
24 VAC

RED

GND

WHT

PPL

HTL

VOUT

24VDC

HEAT 4

GRY

PPL

HEAT 3

WHT

HEAT 2

PNK

HEAT 1

HTL

RED

KC4

HI
MED-HIGH
MED-LOW
LOW

BLACK
BLUE
YELLOW
RED

C
F1
E
KC
K
HTL
MRHTL
M
TB
T
HEAT
L1, L2
N

Capacitor
Fuse
Heating Element
Heating Element
Relay
Fan Relay
Auto-Reset
Thermal Protector
Manual Reset
Thermal Protector
Fan Motor
Terminal Block
Transformer Class 2
Heat
240V Line Supply
Neutral

BLK

YEL

BLK

YEL

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.
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.

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.

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

1. The furnace will not turn on

• Thermostat
• 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
• Heat anticipator in thermostat incorrectly set
or may be defective

3. Elements on, but motor does not run

4. Motor going on and off in short cycles
(or in too long cycles)
5. Must set thermostat much higher (or lower)
than the desired house temperature

• Thermostat is not leveled or out of calibration

6. Not enough heat

• 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
• 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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Broan Furnace 30042432A Users Manual D Series Nortron Electric Furnaces Installation (30042432A)

D SERIES ELECTRIC FURNACE to the manual 7d4b5b0e-7b32-459a-8ac5-45eaa856e8f5

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