PoolPak MPK series - Condensate Drains; Condensate Drainage System Features; Exceptions; Drain Trap Field Installation Instructions

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Condensate Drains
Condensate Drainage System Features
• The diamond plate floor is sloped towards a center drainage channel for each compartment.
• Each compartment has its own drain piping to either side of the unit
• For units selected with a curb, the unit can be ordered with through the curb/bottom condensate drainage. Each
compartment will still require field installation of a drain trap and condensate piping.
• For units without a curb and/or without bottom condensate drainage, field installation of positive and negative
pressure condensate drain traps is required.
• For outdoor units, these traps must also be heat-taped and insulated to protect against freezing.
Exceptions
• With an integral air-cooled condenser, the compressor module section does not have the center drain or
condensate drain piping.
• The integral air-cooled condenser section (located above the compressor module section if selected) does not
require condensate drain piping.
Drain Trap Field Installation Instructions
• A drain trap is required on one side of each compartment. The other side should be plugged.
• Depending on the selection of the unit, a variable number of drain traps are required.
• Drain traps located upstream of the supply fans require negative pressure condensate drain traps. See Figure 4-6
• Drain traps located downstream of the supply fans (supply fan compartment, electric heat module, and gas
funace compartment) require positive pressure condensate drain traps. See Figure 4-7.
• See below illustrations for more detail on the sizing of the negative and positive pressure condensate drain traps.
• Since the drain traps are vented to ambient pressure, they can be tied together and directed towards the nearest
roof or floor drain.
Required Materials
• Schedule 40 (minimum) PVC plastic pipe, elbows, tees, and a removable cap for a cleanout.
• For outdoor units, wrap drain lines and trap with electric heat tape (follow manufacturer’s instructions) controlled
by an automatic thermostat set at a minimum of 35°F to protect against freezing.
• For outdoor units, insulate all external condensate piping. Insulation must be sealed at all seams.
• For additional questions or concerns regarding installation of condensate drains, please contact PoolPak Service.
Power for the field-installed heat tape must be supplied external to the PoolPak unit.
NOTE