Heat Controller HDG Manual Do Utilizador

HDG Series Air Handler 

INSTALLATION INSTRUCTIONS

 

Heat Controller, Inc.

11

Horizontal units must be configured for right hand air supply or left hand air supply. Horizontal 

drain pan must be located under indoor coil. Failure to use the drain pan can result in property 

damage.

Conversion in Horizontal Direction: Horizontal left-hand supply can be changed to horizontal 

right-hand supply by removing the indoor coil and reinstalling 180° from original.

IMPORTANT: There are two pairs of coil rails in the air handler for default and counter flow 

application. If the air handler is installed in an unconditioned space, the two unused coil rails 

should be removed to minimize air handler surface sweating. The coil rails can be easily re-

moved by taking off the 6 mounting screws from both sides of the cabinet.

Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any applicable 

local ordinance.
Disconnect all power to unit before installing or servicing.  More than one disconnect switch may 

be required to de-energize the  equipment. Hazardous voltage can cause severe personal injury 

or death.    

It is important that proper electrical power is available for connection to the unit model 

being installed. See the unit nameplate, wiring diagram and electrical data in the installation 

instructions.

•  

If required, install a branch circuit disconnect of adequate size,  located within sight of, 

and readily accessible to the unit.  

• 

IMPORTANT: After the Electric Heater is installed, units may be equipped with one, two, 

or three 30/60 amp. circuit breakers. These breaker(s) protect the internal wiring in the 

event of a short circuit and serve as a disconnect. Circuit breakers installed within the 

unit do not provide over-current protection of the supply wiring and therefore may be 

sized larger than the branch circuit protection. 

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Supply circuit power wiring must be 167°F [75°C] minimum copper conductors only. See 

Electrical Data In this section for ampacity, wire size and circuit protector requirement. 

Supply circuit protective devices may be either fuses or “HACR” type circuit breakers.   

• 

Power wiring may be connected to either the right, left side or top. Three 7/8”, 1-3/8”, 

1-3/4” diameter concentric knockouts are provided for connection of power wiring to unit. 

• 

Power wiring is connected to the power terminal block in unit electric cabinet.