2
Safety
•
G
rounding wire should be connected with the grounding bar. The grounding wire cannot
be connected to the gas pipe, water pipe, lightening rod or the telephone grounding wire.
Improper grounding may cause electric shock.
•
U
se the wrench to fasten the nut and flare at proper torque. Excessive torque may cause
flared section to break, leading to refrigerant leakage.
•
A
fter refrigerant pipe installation, please take nitrogen leakage test to avoid refrigerant
leakage.
•
R
-410A is the only permitted refrigerant.
•
T
o avoid charging wrong refrigerant, the diameter of check valve is changed for R-410A.
To strengthen the pipe, the dimension of flared pipe is also changed. Please use R-410A
specified tools as shown below.
R-410A specified tools
Remarks
1
Gauge manifold
Range: HP
＞
4.5MPa, LP
＞
2MPa
2
Charge hose
Pressure: HP: 5.3MPa, LP: 3.5MPa
3
Electronic weight meter for charging R-410A
No other means are permitted
4
Torque wrench
5
Flaring tool
6 Copper pipe gauge for adjusting projecting margin
7 Vacuum pump fitting
Vacuum pump must be equipped with
check valve
8
Leakage detector
Only helium detector is permitted
