Panasonic WH-SDC03E3E5 Service Manual

Also see for WH-UD03EE5: Service manual Design handbook Operating instructions Service manual

Contents

Panasonic WH-SDC03E3E5 Service Manual Manual pdf 37 page image

3711.4.3 EVACUATION OF THE EQUIPMENTWHEN INSTALLING AN AIR-TO-WATER HEAT PUMP, BE SURE TO EVACUATE THE AIR INSIDE THE INDOORUNIT AND PIPES in the following procedure.1 Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-wayvalve.o Be sure to connect the end of the charging hose with the push pin to the service port.2 Connect the center hose of the charging set to a vacuum pump with check valve, or vacuum pump andvacuum pump adaptor.3 Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from0 cmHg (0 MPa) to –76 cmHg (–0.1 MPa). Then evacuate the air approximately ten minutes.4 Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in thegauge does not move after approximately five minutes.Note: BE SURE TO FOLLOW THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.5 Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.6 Tighten the service port caps of the 3-way valve at a torque of 18 N•m with a torque wrench.7 Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN”using a hexagonal wrench (4 mm).8 Mount valve caps onto the 2-way valve and the 3-way valve.o • Be sure to check for gas leakage.CAUTIONIf gauge needle does not move from 0cmHg (0MPa) to –76cmHg (–0.1MPa), in step above take the following measure: If the leak stops when the piping connections are tightened further, continue working from step . If the leak does not stop when the connections are retightened, repair the location of leak. Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause frostbite.11.4.4 CONNECT THE CABLE TO THE OUTDOOR UNIT(FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT)1 Remove the control board cover from the unit by loosening the screw.2 Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 x (1.5or 2.5 mm 2) flexible cable, type designation 60245 IEC 57 or heavier cable.3 Secure the cable onto the control board with the holder (clamper).4 Attach the control board cover back to the original position with screw.5 For wire stripping and connection requirement, refer to instruction 11.3.4 of indoor unit.