Installation Of Drain Pipe; Precautions When Doing The Piping Work - Gree GMV-ND07PLS/A-T(U) Service Manual

Multi Variable Air Conditioners Indoor Unit for North America
Pipe Diameter（mm/in.）
9.5(3/8)
12.7(1/2)
16(5/8)

5 Installation of Drain Pipe

5.1 Precautions When Doing the Piping Work

◆ 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:
◆Keep pipe size equal to or greater than that of the connecting pipe.
◆Install the drain piping as shown and take measures against condensation. Improperly rigged
piping could lead to leaks and eventually wet furniture and belongings.
◆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).
◆ Drain hose connectedto the indoor unitCommercially availablehard vinyl chloride pipejoint
(nominal diameter 13mm)Commercially availablehard vinyl chloride pipe(nominal diameter 13mm)
◆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.
6(1/4)
Tightening Torque
15-30N· m(11-22ft.-1b.)
35-40N· m(26-29ft.-1b.)
45-50N· m(33-37ft.-1b.)
60-65N· m(44-48ft.-1b.)
100