Gree FCU Series, Service Manual

Page: 71 / 79

Unit Installation
69
(7) Teflon tape should be used for connection of the inlet and outlet pipes. No leak is allowed.
(8) Pipes should be insulated to prevent from generating condensate.
(9) The condensate pipe should not be blocked with a grade of slope no less than 5%.
(10) A filter should be installed at the return air inlet and cleaned periodically so as to not affect the
heat exchanging efficiency.
(11) For initial operation, open the exhaust valve at the return water pipe to expel air inside coils. Then,
close it until water flows out.
(12) Temperature of the cold water should not be lower than 5
℃
and not higher than 70
℃
for hot
water. Water should be clean. The unit should be entirely maintained every 2~3 years. Water
scale inside coils should be removed by chemical method so as to guarantee the heat exchanging
performance.
(13) The air outlet and the duct should be connected with the flexible connector and shall not bear the
weight of valves, pipes and other devices.
(14) Wiring arrangement should be performed in accordance with the safety standards for electric
devices and local relative regulations. Special electric circuits should be used. When capacity of
the electric circuits is poor or electric operation is improper, it would lead to electric shocks or fire
hazards etc.
(15) The earth leakage circuit breaker should be installed for each installation location. The unit should
be grounded; otherwise it would lead to electric shocks.