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
