Gree GMV-ND28T/A-T Manuel Du Propriétaire page 14

(7) Apply the suitable diameter for converging drainage pipe according to the operating capacity
of the unit.
drainage pipes assembled by T-shaped joints
① -
(8) The installation height of raising pipe for drainage should be lower than 850mm. The gradient
from raising pipe towards drainage direction should be at least 1%~2%. If the raising pipe is
vertical with the unit, the raising height should be less than 800mm.
(9) If the raising pipe is vertical with the unit, the distance between raising pipe and unit should
be less than 300mm.
(10) Drain pipes should have a downward slope of at least 1%~2%, in order to prevent pipes from
sagging, install hanger bracket at intervals of 1000~1500mm.
4.3.3 Test of Drainage System
(1) Please test drainage system after electric work is finished.
Inject approximately 1L purified water to drain pan from air vent, ensure that not to splash the
water over the electrical components (e.g. water pump. etc).
1) In case of commissioning finished, please energize the IDUs and switch to cooling or
dry mode, meanwhile, the water pump operates, you can check the draining through the
transparent part of drain socket.
2) If communication wire is not connected, communication malfunction "C0" will occur after 60s
of energizing. In this case, the water pump operates automatically. Check if the water pump
drains normally drains normally through drainage port. The water pump will stop automatically
after running for 10min.
(2) During the test, please carefully check the drainage joint, make sure no any leakage occur.
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Multi Variable Air Conditioners Cassette Type Indoor Unit
Model
28~50
56~160
1000-1500mm
1
Fig 4.3.2
Fig 4.3.3
A(mm)
170
220
Fig 4.3.4
11
B(mm)
830
780
×