WarmFlo HE-A-**-21 Series Installation & Operating Instructions Manual

02/04/2014  

NI804 

WarmFlo

®

 Electric Furnace 

Installation & Operating Instructions 

HE-A-**-21 Series 

All HE-A-**-21 Electric Furnaces must use one of two chip codes based on applications 

  An AHS chip code: forced air space heating applications 

WFMU chip code: make-up air applications.

  If you have a chip code other than AHS or WFMU, please call factory for assistance. 

Application 

Forced Air Space Heating: 

This model series is outlet warm air sensing only for non-heat pump applications.  With a preset warm air 

temperature, the electric elements modulate to maintain this preset temperature based on the sensing of 

the supply sensor (ST).  The CFM requirement will always have to be setup for full electric capacity. 

Heat/cool conventional room thermostat applies 

Make-Up Air Heating: 

Fresh air code requirements and/or appliances which could 

create unhealthy negative pressure within the building.  

  Building usage, people loading 

  Air environment within building 

  Fireplace 

  Larger kitchen vent hoods 

  Appliances, without sealed combustion 

  Single vent gas furnace or water heater 

  Forced exhaust systems - restrooms, bathrooms, 

kitchens, etc. 

DO NOT DESTROY THIS MANUAL.  PLEASE READ CAREFULLY AND KEEP IN A SAFE 

PLACE FOR FUTURE REFERENCE BY A SERVICE TECHNICIAN. 

Drawings: 

NH806, NH807, NH819, NS802, EC001, XX017