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Safety
CAUTION
Grounding wire should be connected with the grounding bar. The grounding wire can not
be connected to the gas pipe, water pipe, lightening rod or the telephone grounding wire.
Improper grounding may cause electric shock.
Units installed on roof should have appropriate access and handrail.
Use the wrench to fasten the nut and flare at proper torque. Excessive torque may cause flared
section to broke leading to refrigerant leakage.
After refrigerant pipe installation, please take nitrogen leakage test to avoid refrigerant leakage.
R-410A is the only permitted refrigerant.
To avoid mischarging wrong refrigerant, the check valve diameter is changed for R-410A. To
strengthen the pipe, the flared pipe dimension is also changed. Please use R-410A specified
tools as shown below.
When charging refrigerant, the refrigerant must be in liquid state from the tank.
To prevent EMC interference on other appliances, please keep indoor unit, outdoor unit,
power cable and connecting wire at least 1m away from those appliances .
Fluorescent lamp (reverse phase or rapid start type) may interfere the remote controller's
signal. Please install indoor unit away from fluorescent lamp. The farther the better.
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R-410A specified tools
Remarks
Gauge manifold
Range:HP
＞
4.5MPa,LP
＞
2MPa
Charge hose
Pressure:HP:5.3MPa,LP:3.5MPa
Electronic weight for
charging R410A
No other means permitted
Copper pipe gauge for
adjusting projecting margin
Torque wrench
Vacuum pump fitting
Vacuum pump must be equipped with check valve
Only Helium detector permitted
Leakage detector
Flare tool
