Panasonic CS-E7NKEW Service Manual

Also see for CS-E12NKEW: Operating instructions Operating instructions

Contents

Panasonic CS-E7NKEW Service Manual Manual pdf 66 page image

6611.3.3 Evacuation of the EquipmentWHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT ANDPIPES 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.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 TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERENT 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. If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in the step e above take the following measure:- If the leak stops when the piping connections are tightened further, continue working from step e.- If the leak does not stop when the connections are retightened, repair location of leak.- Do not release refrigerant during piping work for installation and reinstallation.- Take care of the liquid refrigerant, it may cause frostbite.11.3.4 Connect the cable to the Outdoor Unit1 Remove the control board cover from the unitby loosening the screw.2 Cable connection to the power supply throughIsolating Devices (Disconnecting means).o Connect approved type polychloroprenesheathed power supply cord 3 x1.5 mm2 (3/4 ~ 1.75HP), 3 x 2.5 mm 2(2.0 ~ 2.5HP) or 3 x 4.0 mm 2 (3.0HP)type designation 245 IEC 57 or heaviercord to the terminal board, and connectthe others end of the cord to IsolatingDevices (Disconnecting means).3 Connection cable between indoor unit andoutdoor unit shall be approvedpolychloroprene sheathed 4 x 1.5 mm 2 flexiblecord, type designation 245 IEC 57 or heaviercord.4 Connect the power supply cord andconnection cable between indoor unit andoutdoor unit according to the diagram below.