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•  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 expense.

•  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.

WARNING

•  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.

•  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.

CAUTION

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 

  or 

 The 

Canadian 

Standards 

Association

   Batterymarch 

Park      178 

Rexdale 

Blvd.

 

 

 

Quincy, MA 02269 

 

 

 

 

       Rexdale, Ontario M9W 1R3

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Summary of Contents for 21B10M

Page 1: ...N AND USER MANUAL IMPORTANT READ AND SAVE THESE INSTRUCTIONS MODELS 21B10M 21B15M 21B18M 21B20M 21B25M 21B27MS 83B13 83B24 AND 83B27 M A DE IN CANA D A F A B R I Q U AU CA N A D A NORTRON Sherbrooke Q...

Page 2: ...ture 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 ca...

Page 3: ...ERED FURNACE HUMIDIFIERS 7 7 4 INTERLOCK CONNECTION 7 8 WIRING DIAGRAMS 8 11 9 SERVICE PARTS 12 10 MAINTENANCE 13 11 TROUBLESHOOTING 13 12 WARRANTY 14 1 DIMENSIONS FK0004A FRONT VIEW RIGHT SIDE VIEW R...

Page 4: ...x 203 mm 23 41 LOW 663 21B15M 15 51228 67 1 3 24 43 MED LOW 814 21B18M 18 61473 77 1 3 27 49 MED LOW 814 21B20M 20 68304 86 1 3 33 59 MED LOW 814 21B25M 25 85379 107 1 3 37 67 MED LOW 814 21B27MS 27...

Page 5: ...s are turned on by the thermostat OFF The blower motor will operate in the standard heating mode controlled by the thermostat MILD During spring and fall you may not require full heating capacity to m...

Page 6: ...of a floor opening 14 x 14 362 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 S...

Page 7: ...ummer 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 diagram at right FUR...

Page 8: ...ing same ratings as high voltage except 18 AWG HI MED HIGH MED LOW LOW FAN MOTOR SPEED BLACK BLUE YELLOW RED COLOR LEGEND C E R K MRTP HEAT L1 L2 Capacitor Heating Element Time Delay Relay Fan Relay A...

Page 9: ...he 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 ordinanc...

Page 10: ...rdinances and regulations Use only Class 1 wiring inside furnace compartments Critical characteristic Line voltage wiring UL AWM 1015 600V 105 C VW 1 8 AWG CSA TEW 600V 105 C FT1 8 AWG and 12 AWG Low...

Page 11: ...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 ins...

Page 12: ...57 12 6 5 37 21 9 DQ 5HOD QRW LQ 0 9 DQ 5HOD 7UDQVIRUPHU 9 ORZHU KHHO PP PP IRU ORZHU 0RWRU 3 9 IRU 06 0RWRU 3 9 IRU 0 0 0 0 DQG 0 0RWRU 3 9 IRU 6HULHV OHPHQW VVHPEO 9 OHPHQW VVHPEO 9 OHPHQW VVHPEO 9...

Page 13: ...N MODE 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 The thermostat must be s...

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