13
Table 9 Liquid Refrigerant Pipe
Serial No.
e
d
c
b
a
Diameter
Ф6.35
Ф6.35
Ф6.35
Ф6.35
Ф9.52
Length
20m
20m
15m
5m
5m
The total length of each liquid refrigerant pipe is: e+d+c+b+a=20+20+15+5+5=65m.
Thus, the minimum additional refrigerant charge=(65-50)
×
0.022=0.33kg (Note: no
additional refrigerant is needed for the liquid pipe within 50m).
4) Additional Refrigerant Charge Record
Table 10 Indoor Unit
No.
Indoor Unit Model
Additional Refrigerant Charge(kg)
1
2
……
N
Total
Table 11 Refrigerant Pipe
Diameter
Total Length(m)
Additional Refrigerant Charge(kg)
Φ15.9
Φ12.7
Φ9.52
Φ6.35
Total
(3) Items to be checked after the Installation
Table 12
Items to be Checked
Possible Errors
Check Results
Has each part and component of the unit
been installed securely?
The unit may fall off, vibrate or generate
noise.
Has the gas leakage test been taken?
The cooling (heating) capacity may be
poor.
Is the thermal insulation sufficient?
Dews and water drops may be generated.
Does the drainage go well?
Dews and water drops may be generated.
Is the actual power voltage in line with
the value marked on the nameplate?
The unit may break down or some
components may be burnt out.
