Air Handlers
introduce toxic, or objectionable fumes/odors into the ductwork. The return ductwork
is to be introduced into the air handler bottom (up flow configuration).
Return Air Filters: Each installation must include a return air filter. This filtering
may be performed at the air handler or externally such as a return air filter grille.
4.6 Electric Heater
The air handlers listed in this manual do not have factory installed electric heat.
Electric heat is available as an accessory. The only heater kits that can be used are
HNRd series. Please refer to installation instructions provided with heater kit for the
correct installation procedure.
Refer to the “installing electric heater” section of this manual and
the instructions provided with the heater kit for the correct installation procedure.
The electrical characteristics of the air handler, the electric
heater kit, and the supply power should be identical. This air handler does not have
factory installed electric heater. Electric heater is available as an accessory. If
installing this option, the only heater kits that can be used are the HNRd series as
indicated below.
4.6.1 “HNRd” Electric Heater Kits Available
SN. Model Description
Ref. air handler
Circuit breaker, 8kW heat strip
4.6.2 “HNRd” Heater Kits Installation
(1) Ensure that all power supply is disconnected prior to installing the heater kit.
(2) A means of strain relief and conductor protection must be provided at the
supply wire entrance into cabinet.
(3) Use copper conductors only.
(4) Installation must follow national electric code and other applicable codes.
(5) If this appliance is installed in an enclosed area such as a garage or utility
room with any carbon monoxide producing appliance, ensure the area is
properly ventilated.
1) Refer to the Table for appropriate HNRd heater kit.
2) Check any physical damage, do not install damaged heater kit.
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