Haier 1U25S2SM1FA Installation Manual

1) FixationThe support of the outdoor unit shall be fixed onto the wall surface, and then the outdoor unit shall be fixed ontothe support horizontally. In case the outdoor unit is wall-mounted or roof-mounted, the support shall be firmlyfixed, to avoid the damage of strong wind.2) Installation of connecting pipesThe 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. Excessivetightening torque shall be avoided, or otherwise the nut may be damaged.• VacuumizingA digital vacuum gauge shall be connected for vacuumizing. The duration of vacuumizing shall be at least 15minutes, and the pressure of the vacuum gauge shall be below 60Pa.Afterwards, the vacuumizing equipment shallbe closed, and whether the reading of the digital vacuum gauge is increased or not shall be observed after thepressure is maintained for 5 minutes. In case no leakage is identified, the two-way stop valve and three-way stopvalve of the outdoor unit may be opened. Finally, the vacuumizing hose connected to the outdoor unit can bedisassembled.• Leak DetectionThe joint of connecting pipes for the outdoor unit shall be subject to leak detection with soap bubble ordedicated leak detection equipment.• Post-installation Inspection Items and Test RunPost-installation Inspection ItemsItems to Be Checked Consequence of Improper InstallationWhether the installation is firm or not The unit may fall, vibrate or make a noiseWhether the inspection on air leakage is completed The refrigerating capacity (heating capacity) may beinsufficientWhether the unit is fully insulated Condensation or drip may occurWhether the drainage is smooth or not Condensation or drip may occurWhether the power voltage is identical to thatmarked on the nameplateFailure may occur or the parts may be burnedWhether the circuit and pipeline are installedcorrectlyFailure may occur or the parts may be burnedWhether the unit is safely earthed Electric leakage may occurWhether the type of wire is in line with relevantregulationsFailure may occur or the parts may be burnedWhether barriers are identified at the air inlet/outletof the indoor/outdoor unitThe refrigerating capacity (heating capacity) may beinsufficientWhether the length of refrigerant pipes and therefrigerant amount charged are recordedThe refrigerant amount charged cannot be confirmedTest Run1. Preparations(1) Power on is not allowed before all the installation operations are completed and before the leakdetection 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 unitbody.2. Methods(1) Switch on the power supply and press the “ON/OFF” on the remote controller, after which the airconditioner will start operating.(2) Press “Mode” to select refrigeration, heating and sweeping wind, and observe whether the airconditioner is under normal operation.6