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Broan nortron 21D20 - User Manual

Broan nortron 21D20
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D SERIES ELECTRIC FURNACE
TEL.: 905-670-2500
FAX: 905-795-8311
CUSTOMER SERVICE TEL.: 1-888-882-7626
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 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.
WARNING
!
30042432A
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

Questions and Answers

  • K
    kevinriveraAug 18, 2025
    Why is my Broan nortron 21D20 not producing enough heat?
    • J
      Joshua FordAug 18, 2025
      If your Broan Furnace isn't producing enough heat, it could be due to several reasons. Check for defective elements or relays. Ensure the SEASON SELECT switch isn't in the MILD position. Safety limits might be opening due to duct obstruction or dirty filters restricting airflow. Also, a two-stage or outdoor thermostat may be defective or incorrectly wired. Finally, ensure there are enough cold air returns in the house.
  • J
    Jessica WalshAug 20, 2025
    What to do if my Broan nortron 21D20 motor runs continuously?
    • V
      Vicki CastroAug 21, 2025
      If the motor in your Broan Furnace runs continuously, it may be caused by thermostat wires incorrectly attached to the furnace. Ensure that thermostat wires are correctly attached to the furnace.
  • B
    Billy RobinsonAug 23, 2025
    How to fix a Broan nortron 21D20 Furnace that will not turn on?
    • R
      Robert ReeseAug 23, 2025
      To troubleshoot a Broan Furnace that won't turn on, first, turn the thermostat to its highest setting. If the light goes on, the thermostat has closed, indicating the fault is in the furnace. If the light does not go on, the issue lies with the thermostat or its connecting wiring.
  • D
    Diane StewartAug 26, 2025
    What to do if elements are on but motor does not run in Broan Furnace?
    • V
      Veronica ChenAug 26, 2025
      If the elements are on but the motor does not run in your Broan Furnace, the issue may be with the motor or capacitor, the SPEED SELECTOR switch (open contact), or the electronic control.
  • T
    Tina FowlerAug 28, 2025
    Why does my Broan nortron 21D20 motor keep going on and off?
    • J
      Jonathan MartinAug 28, 2025
      If the motor in your Broan Furnace is cycling on and off in short (or long) intervals, the heat anticipator in your thermostat might be incorrectly set or defective. Ensure that your heat anticipator is properly set or replace it if defective.
  • B
    bellcharlesAug 30, 2025
    What to do if I must set thermostat much higher than desired temperature in Broan Furnace?
    • R
      Raymond NelsonAug 30, 2025
      If you must set the thermostat much higher (or lower) than the desired house temperature with your Broan Furnace, it could be that the thermostat is not leveled or is out of calibration.
  • W
    William WilsonSep 2, 2025
    What to do if the thermal cut-out opens in Broan nortron 21D20?
    • D
      David PittmanSep 2, 2025
      If the thermal cut-out opens in your Broan Furnace, it could be due to reduced airflow caused by blocked ductwork or very dirty filters. Inspect and clean the ductwork and filters to ensure proper airflow.
  • H
    Heather BlackSep 4, 2025
    What to do if the breaker on the front panel trips on Broan Furnace?
    • L
      lisawilsonSep 4, 2025
      If the breaker on the front panel of your Broan Furnace trips, it indicates an overcurrent on the heating element. Reset the breaker. If the problem persists after resetting, it is recommended to call an electrician.
  • M
    msimsSep 7, 2025
    Why does the motor in my Broan Furnace run continuously?
    • A
      Angela SimmonsSep 7, 2025
      If the motor in your Broan Furnace runs continuously, it might be due to thermostat wires being incorrectly attached to the furnace. Ensure the thermostat wires are correctly connected.
  • E
    Edward HarrisSep 9, 2025
    What to do if the motor in Broan nortron 21D20 cycles on and off too quickly or slowly?
    • K
      kylewolfeSep 9, 2025
      If the motor in your Broan Furnace is cycling on and off in short or long cycles, the heat anticipator in the thermostat may be incorrectly set or defective. Check the heat anticipator setting on your thermostat.

Broan nortron 21D20 Specifications

General IconGeneral
BrandBroan
Modelnortron 21D20
CategoryFurnace
LanguageEnglish

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