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Heat Controller, Inc. INSTALLATION INSTRUCTIONS Cased/Uncased Coils
8
5.0 Drain Applications
5.1 Condensate Drain Piping
Consult local codes for special requirements.
To provide extra protection from water damage, install an additional auxiliary drain pan, provided by
installer under the entire unit with a separate drain line. Manufacturer will not be responsible for any
damages due to the failure to follow these requirements.
5.2 Plastic Drain Pan Installation
Do not use the coil pan shipped with the unit on OIL furnaces or any application where the
temperature of the drain pan may exceed 275°F. A eld fabricated metal drain pan can be
used for these type of applications. Fallure to follow this warning may result in property
damage and/or personal injury.
If the uncased coil is to be installed on top of a gas furnace, allow enough space between the top of the
furnace and the bottom of the plastic coil drain pan to have a free ow of air. A minimum of 2.0” distance
from the top of the furnace and the bottom of the coil pan is required. The coil should be installed with
the line set and drain openings to the front of the furnace.
The coil drain pan has a primary and an optional secondary drain with 3/4” NPT female connections; use
either PVC or metal pipe and hand tighten to a torque of approximately 37 in-lbs. to prevent damage to
the drain pan connection. An insertion depth between 3/8'' to 1/2" inches (3-5 turns) should be expected
at this torque setting.
Use male 3/4” NPT threaded tting for outside connection and make sure the drain holes are not blocked.
Insulation may be needed for drain line to prevent sweating.
W
or
2''
Bottom flange detail
can be typical of the
details below
GAS FURNACE
Warning
Fig. 4: Uncased Coil
W=Coil Pan Width + Insulation Thickness x2