Haier 1U71S2SG1FA Service Manual page 171

• Outdoor Unit Installation
1.Fixing and connection
Note:
a) Fire source shall be avoided within 3m around the place of installation.
b) The leak detection equipment of refrigerant shall be placed at a low position in the
outdoor, and shall be opened.
1) Fixing
The support of the outdoor unit shall be fixed onto the wall surface, and then the outdoor unit shall be fixed onto
the support horizontally. In case the outdoor unit is wall-mounted or roof-mounted, the support shall be firmly fixed,
to avoid the damage of strong wind.
2) Installation of connecting pipes
The cone of the connecting pipes shall be aligned with the conical surface of corresponding valve connector. The
nut of connecting pipes shall be installed at a proper position and then be tightened with a spanner. Excessive
tightening torque shall be avoided, or otherwise the nut may be damaged.
• Vacuumizing
A digital vacuum gauge shall be connected for vacuumizing. The duration of vacuumizing shall be at least 15
minutes, and the pressure of the vacuum gauge shall be below 60Pa. Afterwards, the vacuumizing equipment shall
be closed, and whether the reading of the digital vacuum gauge is increased or not shall be observed after the
pressure is maintained for 5 minutes. In case no leakage is identified, the two-way stop valve and three-way stop
valve of the outdoor unit may be opened. Finally, the vacuumizing hose connected to the outdoor unit can be
disassembled.
• Leak Detection
The joint of connecting pipes for the outdoor unit shall be subject to leak detection with soap bubble or dedicated
leak detection equipment.
• Post-installation Inspection Items and Test Run
Items to Be Checked
Whether the installation is firm or not
Whether the inspection on air leakage is completed
Whether the unit is fully insulated
Whether the drainage is smooth or not
Whether the power voltage is identical to that marked on
the nameplate
Whether the circuit and pipeline are installed correctly
Whether the unit is safely earthed
Whether the type of wire is in line with relevant
regulations
Whether barriers are identified at the air inletloutlet of the
indoorloutdoor unit
Whether the length of refrigerant pipes and the refrigerant
amount charged are recorded
Post-installation Inspection Items
The unit may fall, vibrate or make a noise
The refrigerating capacity (heating capacity) may be
insufficient
Condensation or drip may occur
Condensation or drip may occur
Failure may occur or the parts may be burned
Failure may occur or the parts may be burned
Electric eakage may occur
Failure may occur or the parts may be burned
The refrigerating capacity (heating capacity) may be
insufficient
The refrigerant amount charged cannot be confirmed
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Consequence of Improper Installation