Haier 1U71S2SR2FA, Installation Manual

1)

Fixation

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

Post-installation Inspection Items 

Items to Be Checked 

Consequence of Improper Installation 

Whether the installation is firm or not 

The unit may fall, vibrate or make a noise 

Whether the inspection on air leakage is completed The refrigerating capacity (heating capacity) may be 

insufficient 

Whether the unit is fully insulated 

Condensation or drip may occur 

Whether the drainage is smooth or not 

Condensation or drip may occur 

Whether the power voltage is identical to that 
marked on the nameplate 

Failure may occur or the parts may be burned 

Whether the circuit and pipeline are installed 
correctly 

Failure may occur or the parts may be burned 

Whether the unit is safely earthed 

Electric leakage may occur 

Whether the type of wire is in line with relevant 
regulations 

Failure may occur or the parts may be burned 

Whether barriers are identified at the air inlet/outlet 
of the indoor/outdoor unit 

The refrigerating capacity (heating capacity) may be 
insufficient 

Whether the length of refrigerant pipes and the 
refrigerant amount charged are recorded 

The refrigerant amount charged cannot be confirmed 

Test Run 
1.

Preparations
(1)  Power on is not allowed before all the installation operations are completed and before the leak

detection is proven qualified.  

(2)  The control circuit shall be connected correctly and all the wires shall be firmly connected.  
(3)  The two-way stop valve and three-way stop valve shall be opened. 
(4)  All the scattered articles (especially the metal filing and thread residue) shall be removed from the unit 

body.  

2.

Methods
(1)  Switch on the power supply and press the “ON/OFF” on the remote controller, after which the air

conditioner will start operating.  

(2)  Press “Mode” to select refrigeration, heating and sweeping wind, and observe whether the air 

conditioner is under normal operation. 

6