Air Handlers
19
Items to be checked
Problems might happen due to
improper installation
Check
Check if the unit has been earthed
soundly.
Hazard of electricity leakage.
Check if the wiring conforms to the
wire gage.
Malfunction might happen and parts
might be burned.
Check if there is obstruction
blocking the air inlet/outlet.
It may cause deficiency of cooling
(heating) capacity.
Check if the piping length and
refrigeration charging volume has
been recorded.
Uncertain about the refrigerant
charging volume.
Check if the piping connection and
valves have been set properly.
It may cause unit abnormality and
damage the unit.
Make sure there is no crack among
air return and supply pipe.
It may cause air leak, vibration and
noise.
Check if the panel is mounted firmly.
It may cause air leak, vibration and
condensation.
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.
Summary of Contents for TU24-24AADU
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