16
7.2.4 Record table for refrigerant charge
Indoor units:
SN
Indoor model number
Extra Refr. amount (Kg)
1
2
……
N
Total amount
Liquid pipe:
Liquid pipe diameter
Total length(mm)
Extra Refr. amount (Kg)
Φ15.9
Φ12.7
Φ9.52
Φ6.35
Total amount
7.3 Inspection Items after Installation
Inspection 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 bread down or the components
may be burned out
Are the lines and pipelines correctly
installed?
The unit may bread 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 bread 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.
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