Heat Controller MDG SERIES, CDG SERIES installation instructions Drain Line Installation

Cased/Uncased Coils INSTALLATION INSTRUCTIONS Heat Controller, Inc.

Drain pan has two drain connections on each side to provide flexibility of connection and drainage. Make sure pan has proper pitch and plugged if second connection is not used.

It is highly recommended to use the secondary drain line to prevent overflow when the primary drain is plugged.

NOTE: Water coming from this line means the coil primary drain is plugged and needs clearing.

Install a trap in the drain line below the bottom of the drain pan (required). If using a copper drain line, solder a short piece of pipe to the connector before installing a drain fitting. DO NOT over torque the 3/4” copper connector to the plastic drain connection. Use a wet rag or heatsink material on the short piece to protect plastic drain pan, complete the drain line installation (Fig.5). Use (Fig.6) as a template for typical drain pipe routing. This figure shows how to avoid interference with vent piping.

CONDENSATE DRAIN TRAP

Unit

DO NOT OPERATE UNIT WITHOUT CONDENSATE DRAIN TRAP.

3"

3"

DO NOT OVERTIGHTEN DRAIN FITTING UNIT MUST BE SLIGHTLY INCLINED

TOWARD DRAIN CONNECTION

Fig. 5: Drain Line Installation

TO APPROVED DRAIN

secondary secondary

primary primary

Fig. 6: Drain Pipe Routing

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