Heat Controller HDG Manual Do Utilizador

Heat Controller, Inc. 

INSTALLATION INSTRUCTIONS 

HDG Series Air Handler

8

1-9/16

2-15/16

5/16

2-15/16

1-3/8

1-1/4

5/16

2-13/16

Fig.2 Coil Connection Dimensions

• Vertical Upflow configuration  is  the factory set on all models (see Fig 1). 
• If a side return air opening is required, field fabricate a return air plenum with an opening large enough 

to supply unit and strong enough to support unit weight. 
• If return air is to be ducted, install duct flush with floor. Use fireproof resilient gasket 1/8 to 1/4 in. thick 

between the ducts, unit and floor. Set unit on floor over opening.

Torque applied to drain connections should not exceed 15.ft.lbs.(see Fig.1&2)

Fig. 2 Coil Connection Dimensions

Conversion to Vertical Downflow: A vertical upflow unit may be converted to vertical downflow. 

Remove the door and indoor coil and reinstall 180° from original position. See Fig. 2~3.

IMPORTANT: To comply with certification agencies and the National Electric Code for horizontal 

right application, the circuit breaker(s) on field-installed electric heater kits must be re-installed per 

procedure below so that the breaker switch “on” position and marking is up and, “off” position and 

marking is down.

•   To rotate breaker(s): Rotate one breaker set (circuit) at a time starting with the one on the 

right. Loosen both lugs on the load side of the breaker. (Make sure that wires are identified 

and are reinstalled into proper breaker).Wires are bundles with wire ties, one bundle going to 

the right lug and one bundle going to the left lug.

Refrigerant Line 

Connections

Drain  

Connections