Haier HDU-28CM03 User Manual - Page 26

INSTALLATION MANUAL FOR OUTDOOR UNIT (2) Wiring connection Make wiring to supply power to the outdoor unit, so that the power for the indoor unit is supplied by 1 and 2 terminals. Outdoor unit TB1 R S T N Circuit breaker Earth leakage Indoor breaker unit TB2 HIGH VOLTAGE TB 1 1 2 2 3 3 Outdoor unit TB1 L N Circuit breaker Earth leakage Indoor breaker unit TB2 HIGH VOLTAGE TB 1 1 2 2 3 3 2 Interconnecting wires 1 Interconnecting wires (For 36,42 series, 28 series (380-400V,3N~,50Hz)) (For 24,28 series (1PH, 220-230V~, 50Hz)) WARNING DO NOT CONNECT THE NEUTRAL WIRE N TO R , S OR T PHASE. INTERCONNECTING WIRES MUST BE WIRED WITH SAME SYMBOLS ON THE TERMINALS OF BOTH INDOOR AND OUTDOOR UNIT.INCORRECT WIRING CAUSE EQUIPMENT DAMAGE OR A FIRE. (3) Wiring procedure 1) Remove set screws on the side before taking off the front panel toward the direction shown in figure. 2) Connect wires to the terminal block correctly and fix the wires with a wire clamp equipped near by the terminal block. 3) Route the wires in a proper way and penetrate the wires through the opening for electric wiring on the side panel. Opening for electric wiring 6. Test run Front panel CAUTION THIS UNIT WILL BE STARTED INSTANTLY WITHOUT "ON" OPERATION WHEN ELECTRIC POWER IS SUPPLIED. BE SURE TO EXECUTE "OFF" OPERATION BEFORE ELECTRIC POWER IS DISCONNECTED FOR SERVICING. This unit has a function of automatic restart system after recovering power stoppage. (1) Before starting test run (for all Heat pump models) Confirm whether the power source breaker (main switch) of the unit has been turned on for over 12 hrs to energize the crankcase heater in advance of operation. (2) Test run Run the unit continuously for about 30 minutes, and check the following. Suction pressure at check joint of service valve for gas pipe. Discharge pressure at check joint on the compressor discharge pipe. Temperature difference between return air and supply air for indoor unit. 25