Heat Controller CDG SERIES, MDG SERIES Drain Applications, Condensate Drain Piping

Heat Controller, Inc. INSTALLATION INSTRUCTIONS Cased/Uncased Coils

5.0Drain Applications

5.1Condensate 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

Warning

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 field 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 flow 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.

W

GAS FURNACE

Fig. 4: Uncased Coil

W=Coil Pan Width + Insulation Thickness x2

Bottom flange detail can be typical of the details below

2'' or

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 fitting for outside connection and make sure the drain holes are not blocked.

Insulation may be needed for drain line to prevent sweating.

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