Gree GWC09AB-D3DNA2D Installation Manual page 11

Installation of Outdoor Unit
5. Maintain the pressure for a while after finishing vacuum pumping to see if there is leakage
of the system. Usually the pressure maintenance time of the air conditioner above 5000W
is 5min and the pressure maintenance time of the air conditioner below 5000W is 3min.
During pressure maintenance period, the rebound of pressure should not exceed
0.005Mpa (0.11lb).
6. After finishing vacuum pumping, open the liquid valve slightly to release air in order to
balance the system pressure and present air inlet when removing the hose. Fully open
high-pressure valve and low-pressure valve after removing the hose.
7. Tighten bonnets of high-pressure valve, low-pressure valve and charging port.
Apply soap water to check whether the joints are leaky.
Leak detector can also be applied for leakage test.
Outdoor Condensate Drainage (only for Heat pump unit)
During heating operation, the condensate and defrosting
water should be drained out reliably through the drain hose.
Install the outdoor drain connector in a Φ1 inch hole on
the base plate and attach the drain hose to the connector
so that the waste water formed in the outdoor unit can be
drained out .The hole diameter 25 must be plugged.
Whether to plug other holes will be determined by the dealers according to actual conditions.
Leakage test
8
Leak detection point
of indoor unit
Leak detection point
of outdoor unit
Bottom frame
Drain plug
Drain connecter
Hose (available commercially,
inner dia. 16mm)
Drain-water hole