Air Handler
12
4.6 Condensate Removal
The drain pan has primary and secondary drain connection (Figure 8). Condensate removal is
performed by attaching a 3/4” PVC pipe to the evaporator coil pan and terminated in accordance
with local or state Plumbing/HVAC codes. The installation must include a “P” style trap that is
located closely to the evaporator coil. Do not over-tighten the drain connection(s) in order to
prevent possible damage to the evaporator drain pan.
See Figure 9 for details of a typical condensate line “P” trap.
Unit
Drain connection
Flexible tubing
(hose or pipe)
Positive liquid
seal (REQ'D)
2" minimum
3" minimum
Fig. 9
4.7 Ductwork
This air handler is designed for a complete supply and return ductwork
system.
WARNING
: Do not operate the unit without all ductwork completed.
To ensure correct system performance, the ductwork is to be sized to accommodate Table 5.
Inadequate ductwork that restricts airflow may result in improper performance and compressor or
heater failure. Ductwork is designed with less restrictions of airflow and maintains suitable airflow
speed. And keep the ductwork sealed with good hermeticity.
Return Ductwork. Do not place the duct inlet at a place where is filled with toxic gas or harmful
fume/odor. For upflow configuration, duct terminal connects to the bottom of the air handler.
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.
4.8 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.
WARNING
: Refer to the “installing electric heater” section of this manual and the instructions
provided with the heater kit for the correct installation procedure.
WARNING
: 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 optition, the only heater kits that can be
used are the HNRD series as indicated below.
