Carrier 40QSM009DS Service Manual page 76

Hanger
B
Flexible pipe 300mm
8. Blowhole setting

For the concentrated drainage pipe system,
there should design a blowhole at the
highest point of main pipe to ensure the
condensate water discharge smoothly.

The air outlet shall face down to prevent dirt
entering pipe.

Each indoor unit of the system should be
installed it.

The installation should be considering the
convenience for future cleaning.
Indoor unit
Plug
9. The end of drainage pipe shall not
contact with ground directly.
13.5.3 Drainage test
13.5.3.1. Water leakage test
After finishing the construction of drainage pipe
system, fill the pipe with water and keep it for
24 hours to check whether there is leakage at
joint section.
13.5.3.2. Water discharge test
1. Natural drainage mode(the indoor unit with
outdoor drainage pump)
Infuse above 600ml water through water test
hole slowly into the water collector, observe
whether the water can discharge through the
transparent hard pipe at drainage outlet.
Down incline pipe
A:Length of horizontal pipe ≤ 150mm
B: Lift height ≤ the pump head of water pump
Blowhole
Indoor unit
Plug
2. Pump drainage mode
2.1 Disconnect the plug of water level switch,
remove the cover of water test hole and slowly
infuse about 2000ml water through the water
test hole, be sure that the water will not touch
the motor of drainage pump.
2.2 Power on and let the air conditioner
operate for cooling. Check operation status
of drainage pump, and then connect the
plug of water level switch, check the
operation sound of water pump and
observe whether the water can discharge
through the transparent hard pipe at
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