25
Unit Installation
(4) The exible connectors or the movable joints should be used for connection of the water inlet and
outlet pipes. Moreover, the water lters should be installed at the water inlet pipe.
(5) The condensate pipe should not be blocked with a grade of slope no less than 5%.
(6) A lter should be installed at the return air inlet and cleaned periodically so as to not affect the heat
exchanging efciency.
(7) For initial operation, open the exhaust valve at the return water pipe to expel air inside coils. Then,
close it until water ows out.
Exhaust valve
(8) Temperature of the cold water should not be lower than 5°C and not higher than 70°C (for
concealed ceiling types) or 65°C (for vertical mounted types) 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.
(9) The air outlet and the duct should be connected with the exible connector and shall not bear the
weight of valves, pipes and other devices.
(10) 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 re
hazards etc.
(11) The earth leakage circuit breaker should be installed for each installation location. The unit should
be grounded; otherwise it would lead to electric shocks.
Warning
Installation and commissioning work must be performed by professional personnel. Improper
installation would cause water leaks, electric shock and re accidents.
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