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CONDENSATE DRAIN PIPING
Tools and Instruments - General Piping Tools
Trap - A female piping thread screw connection is provided. Dimension "L" in Fig. 7. should be
sufficiently longer than the negative fan pressure at the drain connection (50 mm to 100 mm depends on
the return air duct design). Always fill the trap with water.
Cooling Unit
Longer than "1/2L"
NOTE;
When the relative humidity of inlet air or ambient air exceeds 80％, apply an auxiliary drain pan
(field-supplied) beneath the cooling unit as shown in Fig. 7.
Field Insulation
Insulate the duct flange, the refrigerant piping connection and the condensate drain connection
adequately, as shown in Fig. 8.
* : Field-Supplied
15
Condensate Drain Piping
Condensate Drain Connection
Horizontal or Pitched Down
Longer than "L"
Water Seal Trap
Fig. 7. Condensate Drain Connection
Fig. 8. Field Insulation
Cooling Unit
Auxiliary Drain Pan
(Field-Supplied)
*Duct
Duct Flange
Insulation
Refrigerant Pipe
Insulation
Cooling Unit
Cooling Unit
Condensate Drain
Connection Insulation
To the Atmosphere
*Duct Insulation
Cooling Unit
*Refrigerant Pipe Insulation
*Refrigerant Pipe
*Drain Pipe Insulation
*Condensate Drain Pipe
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