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Air Handlers
Items to be checked
Check if the unit has been earthed
soundly.
Check if the wiring conforms to the
wire gage.
Check if there is obstruction
blocking the air inlet/outlet.
Check if the piping length and
refrigeration charging volume has
been recorded.
Check if the piping connection and
valves have been set properly.
Make sure there is no crack among
air return and supply pipe.
Check if the panel is mounted firmly.
5.2 Trial Run
5.2.1 Preparative for Trial Run
(1)
Never power on the unit until all the installation work has been done.
(2)
All the control circuit and wiring has been connected correctly and soundly.
Valves on the gas and liquid line should be completely open.
(3)
All the scattered objects should be removed, especially metal filing, thrum and
clip.
(4)
Check if the unit appearance and piping system has been damaged during
transportation or handling.
(5)
Check if the terminals are loose and the phases are correct.
5.2.2 Trial Run
(1)
Trial run can be operated by professional personnel only after above items
have been checked (items to be checked as per actual condition).
(2)
Power on the unit and press ON/OFF button to activate.
(3)
After compressor starting up, please immediately stop the unit when abnormal
sound emits.
(4)
Trial run under several modes and check if the unit operates normally.
Problems might happen due to
improper installation
Hazard of electricity leakage.
Malfunction might happen and parts
might be burned.
It may cause deficiency of cooling
(heating) capacity.
Uncertain about the refrigerant
charging volume.
It may cause unit abnormality and
damage the unit.
It may cause air leak, vibration and
noise.
It may cause air leak, vibration and
condensation.
19
Check
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