Haier MRVIII-S AV08NMSETA Design, Installation & Maintenance Instruction page 38

• 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 fl are at proper torque. Excessive torque may cause
fl ared 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 fl ared pipe dimension is also changed. Please use R-410A specifi ed
tools as shown below.
R-410A specifi ed tools
1 Gauge manifold
2 Charge hose
3 Electronic weight for charging R410A
4 Torque wrench
5 Flare tool
6 Copper pipe gauge for adjusting projecting margin
7 Vacuum pump fi tting
8 Leakage detector
• 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 fl uorescent lamp. The farther the better.
CAUTION
Remarks
Range:HP ＞ 4.5MPa,LP ＞ 2MPa
Pressure:HP:5.3MPa,LP:3.5MPa
No other means permitted
Vacuum pump must be equipped with
check valve
Only Helium detector permitted
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