Gree U-MATCH Series Service Manual page 58

Warning: The height of installation for the indoor unit should be 2.5m above.
1.1.6 Drain Piping Work
Installation of Drainage Pipeline:
Install the drain hose in accordance with the instructions in this installation manual and keep the area
warm enough to prevent condensation. Problems with the piping may lead to water leaks.
(1) Install the drain hose with downward gradient (1/50 to 1/100) and no risers or traps are used for
the hose. (Figure 3-1-7)
(2) Be sure there is no crack or leak on the drain hose to avoid the formation of air pocket.( Figure
3-1-7)
(3) When the hose is long, install supporters. (Figure 3-1-8)
(4) Always use the drain hose which has been insulated properly.
Supporter
Drain hose
√
Arrange the drain hose
lower than this drain port
Rise
Figure 3-1-7
1~1.5m(3-2/7~5feet)
Figure 3-1-8
Condensate Drainpipe
Enlarged View
Condensate Drainpipe
Figure 3-1-10
U-Match Series DC Inverter Service Manual
CAUTION!
Drain hose
Figure 3-1-9
As the inside of the unit is in the
negative pressure status, it is required
to set up a backwater elbow. The
requirements is:
A=B≥(0.145P/10000+20)/25.4(inch)
P is the absolute pressure inside the
unit. The unit of the pressure is psig.
55
Trap
Air bleeding