GREE GMV5 INDOOR UNIT SERVICE MANUAL
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(4) Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so that
air may not remain trapped inside the pipe.
For example:
(5) Keep pipe size equal to or greater than that of the connecting pipe.
(6) Install the drain piping as shown and take measures against condensation. Improperly rigged
piping could lead to leaks and eventually wet furniture and belongings.
(7) When directly connecting a hard vinyl chloride pipe joint to the drain hose connected to the
indoor unit, use a commercially available hard vinyl chloride pipe joint (nominal diameter 13mm).
(8) Drain hose connectedto the indoor unitCommercially availablehard vinyl chloride pipejoint
(nominal diameter 13mm) Commercially availablehard vinyl chloride pipe (nominal diameter
13mm)
(9) Do not connect the drain piping directly to sewage pipes that smell of ammonia. The ammonia
in the sewage might enter the indoor unit through the drain pipes and corrode the heat exchanger.
4.2 Installing the Drain Pipes
Insert the drain hose into the drain outlet, and tighten the clamp securely with tape.
Tighten the clamp until the screw head is less then 4 mm from the hose.
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