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ECM SERIES ELECTRIC FURNACE

TEL.: 905-670-2500

FAX: 905-795-8311

CUSTOMER SERVICE TEL.: 1-888-882-7626

MISSISSAUGA, ONTARIO L5T 1H9

30042458A

• 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

!

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

Summary of Contents for ECM SERIES

Page 1: ...ectrical 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 electri...

Page 2: ... 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 additi...

Page 3: ...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 3 LOW FACTORY SETTINGS SUBJECT TO CHANGE WITHOUT NOTICE This speed can only be run with heater off for cooling ventilation purposes only WARNING 240 VOLTS SINGLE PHASE TEMP RISE 0 20 in W C MODEL NO kW BTUH AMPS INCL MOTOR HP BLOWER C F SPEED RPM 21...

Page 4: ... 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 a 2 A range A Set the anticipator at its highest setting B Disconnect the W1 thermostat wire from...

Page 5: ...tions for mounting and wiring are included with the kit 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 MAINTENANCE MOTOR The motor is ...

Page 6: ... 10941291 Service Blower Assembly for 21ECM10 and 21ECM15 10941292 Service Blower Assembly for 21ECM18 20 23 15 624664 Daughterboard 21ECM23 only 16 FK120 ECM 120 Volt Kit optional purchase separately Item not shown REPLACEMENT PARTS AND REPAIR In order to ensure your unit remains in good working condition you must use Broan NuTone genuine replacement parts only The Broan NuTone genuine replacemen...

Page 7: ... 3 P3 4 P3 5 P3 6 P3 7 GRY BRN PNK Open 93 3 C 200 F MRHTL2 WHT WHT WHT WHT RED RED MRHTL1 WHT WHT Line voltage wiring UL AWM 1015 1230 600V 105 C VW 1 12 AWG CSA TEW 600V 105 C FT1 12 AWG Low voltage wiring same ratings as high voltage except 18 AWG Critical Characteristics 1 If any of the original wire as supplied must be replaced use the same equivalent wire Wiring must comply with applicable c...

Page 8: ...C2 KC1 K7 24 VAC 24 VAC COMMON OUT FUSED 24VAC POWER OUT CALL FOR FA CALL FOR COOL REVERSING VALVE CALL FOR HEAT 1 CALL FOR HEAT 2 CALL FOR COOL 1 BOARD POWER SUPPLY POWER HEAT 1 HEAT 2 HEAT 3 HEAT 4 VOUT GND 24VDC 24VDC 24VDC 24VDC E HTL E HTL E HTL G L1 COM NO COM NO COM NO COM NO Class 2 Transformer Pri 240 V 60 Hz Sec 24 V 60 Hz 40 VA YEL YEL RED BLK RED BLK BLK BLK BLK RED K L B D E R BLK BLK...

Page 9: ...CALL FOR HEAT 1 CALL FOR HEAT 2 CALL FOR COOL 1 BOARD POWER SUPPLY POWER HEAT 1 HEAT 2 HEAT 3 HEAT 4 VOUT GND 24VDC 24VDC 24VDC 24VDC E HTL E HTL E HTL G L1 COM NO COM NO COM NO COM NO Class 2 Transformer Pri 240 V 60 Hz Sec 24 V 60 Hz 40 VA YEL YEL RED BLK RED BLK BLK BLK BLK RED K L B D E R BLK BLK BLK BLK PPL HEAT 4 HEAT 3 HEAT 2 HEAT 1 PNK BRN GRY WHT YEL WHT WHT WHT BLK PPL VENTILATION SPEED ...

Page 10: ...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 ...

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