Nortron B, 21B10M, 21B15M, 21B18M, 21B20M Installation And Operating Instructions Manual

30042431A

B SERIES ELECTRIC FURNACE

TEL.: [phone]

FAX: [phone]

CUSTOMER SERVICE TEL.: [phone]

MISSISSAUGA, ONTARIO L5T 1H9

• 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 used 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.

WARNING

!

IMPORTANT: READ AND SAVE THESE INSTRUCTIONS.

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
Quincy, MA 02269

The Canadian Standards Association

178 Rexdale Blvd.

Rexdale, Ontario M9W 1R3

or

2

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.

INSTALLATION AND OPERATING INSTRUCTIONS

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.

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.

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.

UNIT CERTIFICATION

This furnace is CSA certified.

TOP VIEW

1½”

(38 mm)

17” x 17”

FK0003A

20”

(508 mm)

39”

(991 mm)

(432 mm x 432 mm)

DISCHARGE

FRONT VIEW RIGHT SIDE VIEW REAR VIEW LEFT SIDE VIEW

20”

(508 mm)

1½”

(38 mm)

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

18” x 18”

(457 mm x 457 mm)

RETURN

WIRING KO’S VALUES

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

WIRING KO’S

C

1½” x 1½” KO

(38 mm x 38 mm)

18” x 18”

(457 mm x 457 mm)

RETURN

1½” x 1½” KO

(38 mm x 38 mm)

18” x 18”

(457 mm x 457 mm)

RETURN

®

GENERAL REQUIREMENTS AND SPECIFICATIONS (CONT’D)

3

10” x 8” (254 mm x 203 mm) BLOWER

SPEED

FLOW

RATE

STATIC PRESSURE

(INCHES OF WATER COLUMN)

0.2 0.3 0.4 0.5 0.6

LOW****

CFM

L/s

756
357

749
353

740
349

729
344

713
337

MED-LOW

CFM

L/s

1035

488

1018

480

997
470

971
458

935
441

MED-HIGH

CFM

L/s

1177

556

1157

546

1132

534

1102

520

1063

502

HIGH

CFM

L/s

1301

614

1276

602

1247

588

1207

569

1145

540

12” x 8” (304 x 203 mm) BLOWER

†

SPEED

FLOW

RATE

STATIC PRESSURE

(INCHES OF WATER COLUMN)

0.2 0.3 0.4 0.5 0.6

LOW****

CFM

L/s

727
343

699
330

667
315

636
300

606
286

MED-LOW****

CFM

L/s

912
431

897
423

878
414

853
402

823
388

MED-HIGH

CFM

L/s

1216

574

1200

566

1181

557

1157

546

1129

533

HIGH

CFM

L/s

1640

774

1601

755

1558

735

1513

714

1466

692

240 VOLTS – SINGLE PHASE TEMPERATURE RISE @0. 20” W. C.

MODEL NO. KW BTUH AMPS INCL. MOTOR HP BLOWER °C °F *SPEED RPM

21B10M 10 34120 46 1/3

10” x 8”

(254 mm x 203 mm)

21 70 LOW 663

21B15M 15 51180 67

1/3

24 75 MED-LOW 814

21B18M** 18 61420 77

1/3

27 81 MED-LOW 814

21B20M** 20 68240 86

1/3

33 91 MED-LOW 814

21B25M** 25 85300 107

1/3

37 99 MED-LOW 814

21B27MS***

†

27 92130 116 3/4

12” x 8”

(304 mm x 203 mm)

36 97 MED-HIGH 707

208 VOLTS – THREE-PHASE

83B13 13.5 46060 42 1/3

10” x 8”

(254 mm x 203 mm)

21 70 MED 960

83B24 24 81890 70

1/3

35 95 MED 960

83B27 27 92130 78

1/3

39 102 MED 960

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

WARNING:

*FACTORY SETTINGS.
**21B18M, 21B20M and 21B25M must NOT be setup to run continuously at LOW speed as it will cause overheating conditions. These

models are certified to run only at HIGH, MED-HIGH and MED-LOW speeds.

***21B27MS must NOT be setup to run continuously at LOW or MED-LOW speeds, as it will cause overheating conditions. This model

is certified to run only at HIGH and MED-HIGH speeds.

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

†

21B27MS has built-in noise-absorption components to run quietly during continuous or regular cycle modes.

OPERATING OPTIONS

The furnace is shipped from the factory in a “Standard Heating Mode”
(all switches are in the Down position). When the thermostat calls for
heat, the automatic controls will be activated and the furnace turned “ON”.

The blower will run at low speed as the furnace heats up and will
automatically switch to a higher speed when additional elements
are activated by the time delay relays.

The timing of this blower speed change will depend on the size of
the furnace (10 kW and 13.5 kW models do not change speed),
and whether C

OLD or MILD is selected on the SEASON SELECT

switch.
You may, however, change from the Standard Heating Mode by

using the controls built into your furnace.

LOW SPEED SEASON SELECT

O

N

MILD

COLD

ON – Some homeowners prefer the blower to run at low speed to

more evenly distribute air in the house. In this position, the
blower will run continuously on low and automatically
change to a higher speed when heating elements are
turned on by the thermostat.

O

FF – The blower motor will operate in the standard heating

mode, controlled by the thermostat.

M

ILD – During spring and fall, you may not require full heating

capacity to maintain a comfortable temperature. In this
position, approximately half of the elements are “off-line”
and will not be energized when the thermostat calls for heat.

C

OLD – All elements are “on-line” and controlled by the thermostat.

NOTE: If outdoor or two-stage thermostat is used, switch MUST

be in M

ILD position at all times.

OFF

(NOT INCLUDED IN MODELS
21B10M AND 83B13)

4

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.

2. ELECTRICAL WIRING - POWER SUPPLY
The furnaces are completely factory wired. From a separate
breaker, a two-wire plus ground supply wire is required for
single phase units, and a three-wire plus ground supply wire for
three phase units. 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: On single-phase furnaces, when a FK120 kit is used to

supply an air cleaner and/or humidifier, a third (neutral)
conductor must be brought into the furnace.

3. CONNECTING AND ADJUSTING
THE LOW VOLTAGE THERMOSTAT
(Use only class 1 wires inside furnace compartments.)
Attach thermostat wires to the low voltage terminal
block located on the inside of 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.

Because each installation is different an accurate reading of the
current draw should be made with an AC meter. Set the meter
at 2 A range for furnaces through 20 kW, and at 4 A range for
larger units.

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.

CAUTION

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.

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

Models 21B10M, 21B15M, 21B18M & 21B20M 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)

5

USING OPTIONAL EQUIPMENT

1. A TWO-STAGE OR OUTDOOR THERMOSTAT

(The SEASON SELECT switch must be in the MILD position.)
These controls can be used on all furnaces except 10 kW
model. Follow the directions supplied with the two-stage or
outdoor thermostat in conjunction with the furnace wiring
diagram. When used, the furnace stage will supply heat as
follows in the opposite chart:

First Stage (kW) Second Stage (kW)

10 kW 10 –
15 kW 10 5
18 kW 9 9
20 kW 10 10
25 kW 15 10
27 kW 13.5 13.5

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: centred 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.

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

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. FK120 kit is not available for
83B 208 V three-phase models.

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.

Also, please note that Norton has developped a low speed interlock
kit; the FIK (Furnace Interlock Kit). This kit is specially designed
to interlock the furnace operation with a ventilation fan or an
HRV unit.

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-out that open at 200°F (93°C). In a case of a
manual reset cut-out being open, a front panel needs to
be removed so the cut-out can be manually reset.

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

COMMON GREEN RED WHITE

WHITE

(BLUE

OPTIONAL)

YELLOW

WARNING

!

Cut 240 V supply before removing the front panel!

R
G

24 VAC
Power Output

Call for FAN

Furnace

Furnace

Thermostat

G

R

Relay

NC
NO

COM

External Request
for Fan Activation

Electric Furnace

System

THERMOSTAT

FURNACE

FE0001A

CONDENSER

SERVICE PARTS

REPLACEMENT PARTS

TIME DELAY RELAYS (SEQUENCERS)

KEY NO. PART NO. BOTTOM SECOND THIRD

1

30270025 B15 B24-27
30270026 B10 B18-20-25-27
10940925 B15-18-20
10940926 B25-27

KEY NO. PART NO. DESCRIPTION

2 10940927 24 V Fan Relay
3 10940928 240 V Fan Relay (not in 21B10M)
4 30270032 Automatic Limit
5 30030006 Low Speed and Season Select Switch
6 30280021 Thermostat Indicator Light
7 10941288 Motor 3/4 HP, 240 V
8 10941203 Motor 1/3 HP, 240 V

9 30080025 Motor 1/3 HP, 208 V
10 30390553 Blower Wheel 12” x 8” (305 mm x 203 mm)
11 10941149 Service Blower Assembly DD10, 1/3 HP, 240 V
12 30270038 Capacitor for 1/3 HP Motor
13 10940080 Element Assembly 5000 W, 240 V
14 10940081 Element Assembly 4500 W, 240 V
15 10940082 Element Assembly 4500 W, 208 V
16 10940083 Element Assembly 4000 W, 208 V
17 30271114 Capacitor for 3/4 HP Motor
18 30280020 Manual Reset Limit
19 30010010 Fiberglass Filter 20” x 20” x 1” (508 mm x 508 mm x 25 mm)
20 30300022 Transformer 240 V

21* 10941221 Service blower assembly for 21B27MS
22* 10940353 Service blower assembly for 83B13/24/27

-* FIK Furnace Interlock Kit (optional, purchase separately)

-* FK120 120 Volt Kit (optional, purchase separately)

*Not illustrated.

1

5

2

3

4

1

7 8 9

10

12 17

13 14 15 16

19

6

18

11

20

6

WIRING DIAGRAMS

10 KW - 240 VOLTS

- SINGLE PHASE

15 KW - 240 VOLTS - SINGLE PHAS E

NC NC

NO

NO

24V

240V 24V

24V

NC

NC NC

NO

COM

NO

NO

18-20 KW - 240 VOLTS - SINGLE PHASE

NC

NC NC

COM

NO

NO

CONNECT 24 V ROOM THERMOSTAT BETWEEN R AND W1.

USE ONLY CLASS 1 WIRING

INSIDE FURNACE COMPARTMENTS.

LEGEND

LS

E

LC

FR

24V

M

24V

ORANGE

BLUE

RED

YELLOW

BLACK

13

56

24

TR

L1

L1

L2

N

L2

L2

C

G

R

W1

W2

L1

L1

M1

M2

M4M3

L1

24V

TR

L1

L2

N

C

G

R

W1

W2

L2

L2

L2

24V

24V

L1 M1 M2

M5 M6

M1

M2

M4M3

L1

L1

L2

3

3

1 1

4

4

6 5

2

2

5

L1

L2

M

ORANGE

BLUE

RED

YELLOW

BLACK

R

L1

LS

R2

ELC

R1

FRX FR

240V 24V

24V

NO

24V

TR

L1

L2

N

C

G

R

W1

W2

L2

L2

L2

24V

24V

L1 M3 M4

M5 M6

M1

M2

M4M3

L1

L1

L2

3

3

1 1

4

4

6 5

2

2

5

L1

L2

C

M

ORANGE

BLUE

RED

YELLOW

L1

LS

R2

R1

FRX

FR

BLACK

L2

ELC

M1

M2

L1

L

MRHTL MRHTL

MRHTL

MRHTL

SS

R

W2

L

C

W1

MRHTL

MRHTL

SS

R

W2

L

C

W1

27 KW - 240 VOLTS - SINGLE PHASE

NO

WARNING: These models are not certified to run continuously in low speed (red wire) as it will cause

overheating conditions. DO NOT reconnect red wire into different terminal.

WARNING: These models are not certified to run continuously in low speed (red wire) or in med-low speed

(yellow wire) as it will cause overheating conditions. DO NOT reconnect red wire into different

terminal and DO NOT connect yellow wire.

NC

NC NC

COM

NONO

240V

24V

TR

L1

L2

N

M3

M4

M5

M6

M1

M2

M4

M3

C

M

M1

M2

L2

L2

L2

L2

L2

C

G

R

W1

W2

24V

24V

24V

L1

L1

L1

L1

L1

4

3

1

6 5

2

3 1

4 2

5

LS

L1

24V

FR

FRX

ORANGE

BLUE

RED

YELLOW

BLACK

L1

L2

R1

R2

A1 A2

24-25 KW - 240 VOLTS - S INGLE PHASE

ELC

NC

NC NC

COM

NONO

240V

24V

TR

L1

L2

N

M3

M4

M5

M6

M1

M2

M4

M3

C

M

M1

M2

L2

L2

L2

L2

L2

C

G

R

W1

W2

24V

24V

24V

L1

L1

L1

L1

L1

4

3

1

6 5

2

3 1

4 2

5

LS

L1

24V

FR

FRX

ORANGE

BLUE

RED

YELLOW

BLACK

L1

L2

R1

R2

A1 A2

ELC

24V

M1

M2

R3

L2

SS

R

W2

L

C

W1

MRHTL

MRHTL

SS

R

W2

L

C

W1

Open 93.3°C (200°F)

Open 93.3°C (200°F)

MRHTL

MRHTL

Open 93.3°C (200°F)

Open 93.3°C (200°F)

Open 93.3°C (200°F)

CEFR

FRXLLCMRSSLSTRCOMNCNO

CAPACITOR

ELEMENT

FAN RELAY - 24

FAN RELAY - 240

LIGHT

AUTOMATIC LIMIT

MOTOR

TIME DELAY RELAY

SEASON SELECT

LOW SPEED

TRANSFORMER

COMMON

NORMALLY CLOSED

NORMALLY OPEN

SUBJECT TO CHANGE WITHOUT NOTICE.

NO

C

WARNING: These models are not certified to run continuously in low speed

(red wire) as it will cause overheating conditions.

DO NOT reconnect red wire into different terminal.

FAN MOTOR SPEED

HI

MED - HIGH

MED - LOW

LOW

BLACK

BLUE

YELLOW

RED

COLOR

7

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.

!

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.

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 operating. If the light is “OFF”, the furnace should not be
operatin

g—unless the LOW SPEED switch is set to run the motor

continuously.

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 problem resides 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.

TROUBLESHOOTING

PROBLEM POSSIBLE DEFECTIVE PARTS OR COMPONENTS

1. The furnace will not turn on

• Thermostat

• Circuit breaker or fuse is open

• Motor or capacitor

• LOW SPEED Switch (open contact)

• Bottom Sequencer

• Transformer

2. Motor runs continuously

• LOW SPEED switch is not on OFF position

• Thermostat wires incorrectly attached to furnace

• Bottom sequencer (the bottom heating element would also remain on)

• 24V relay

3. Elements on, but motor does not run

• Motor or capacitor

• LOW SPEED Switch (open contact)

• Bottom sequencer

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

6. Not enough heat

• One or more defective elements or sequencers

• 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

8. Motor goes off, but one or more elements stay on • Sequencer

9. Automatic speed change doesn’t occur when
furnace heats up

• Top sequencer

• 240 V relay

8

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