Gree FGR50Pd/DNa-M Owner's Manual page 9

Ducted Type Split Air-Conditioner Units(Inverter Series)
2.3.2 Drainage Pipe Installation
For easy drainage of the condensation water, the drainage pipe should be installed with a
downward gradient. To avoid the condensation, the connection pipe joint should be insulated with
thermal insulation material. A water seal should be employed as shown in Fig.8 and the height of
the water seal could be determined by the pressure of the drain hose.
Drain hose is in negative pressure state: A = B≥P/10+20 (mm).
Drain hose is in positive pressure state: A≥30mm，B≥P/10+20 (mm).
NOTE: P is the absolute pressure of the drain hose position, Pa.
2.3.3 Test of Drainage System
(1) 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.).
(2) During the test, please carefully check the drainage joint, make sure no any leakage
occur.
(3) It is strongly recommend to do the drain test before ceiling decoration.
Fig.7
Fig.8
Fig.9
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