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Filling of Refrigerant and Test Run
2. Method of Calculating Mass of Additional Refrigerant to Be Filled (Based on the Liquid Pipe)
Mass of Additional Refrigerant to Be Filled =∑ Length of Liquid Pipe × Amount of Additional Refrigerant to
Be Filled Per Meter of Liquid Pipe
Amount of Additional Refrigerant to Be Filled Per Meter of Liquid Pipe（kg/m）
Φ22.2 Φ19.05 Φ15.9 Φ12.7 Φ9.52 Φ6.35
0.35 0.25 0.17 0.11 0.054 0.022
● Inspection Items after Installation
Check Items Problems Owing to Improper Installation Check
Is the installation reliable? The unit may drop, vibrate or make noises
Has the gas leakage been checked?
May cause unsatisfactory cooling (heating)
effect
Is the thermal insulation of the unit
sufficient?
May cause condensation and water
dropping
Is the drainage smooth?
May cause condensation and water
dropping
Does the power supply voltage accord
with the rated voltage specified on the
nameplate?
The unit may break down or the
components may be burned out
Are the lines and pipelines correctly
installed?
The unit may break down or the
components may be burned out
Has the unit been safely grounded? Risk of electrical leakage
Are the models of lines in conformity with
requirements?
The unit may break down or the
components may be burned out
Are there any obstacles near the air inlet
and outlet of the indoor and outdoor
units?
May cause unsatisfactory cooling (heating)
effect
Have the length of refrigerating pipe and
refrigerant charge amount been
recorded?
It is not easy to decide the charge amount
of refrigerant.
● Test Run
1. Inspection before Test Run
Check if the appearance of unit and the piping are damaged during shipment or handling☆
Check if the terminals of the electrical components in the unit are loose and if the phase sequence is ☆
correct
Check if t☆ he rotating direction of the fan is correct
Check if all the valves in the inspections system are all opened.☆
2. Test Run
After the results of the above inspection items are all accepted, the test run shall be carried out by ☆
qualified technicians.
En☆ ergize the unit and set the status of the wire controller or the remote controller as ON.
The outdoor fan and the compressor shall automatically start up within one minute.☆
In case there is abnormal noise after the compressor starts up, immediately shu☆ t down the unit and carry
out inspection.
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