Panasonic WH-ADC0309H3E5 Service Manual page 38

11.2.4 Evacuation of the Equipment
WHEN INSTALLING AN AIR-TO-WATER HEAT PUMP, BE SURE TO EVACUATE THE AIR INSIDE THE UNIT
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-way
valve.
Be sure to connect the end of the charging hose with the push pin to the service port.
o
2 Connect the center hose of the charging set to a vacuum pump with check valve, or vacuum pump and
vacuum pump adaptor.
3 Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from
0 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 the
gauge 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.
Be sure to check for gas leakage.
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If gauge needle does not move from 0 cmHg (0 MPa) to –76 cmHg (–0.1 MPa), in step 3 above take the following measure:
1. If the leak stops when the piping connections are tightened further, continue working from step 3.
2. If the leak does not stop when the connections are retightened, repair location of leak.
3. Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause frostbite.
11.2.5 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 flexible
cable (see below table), type designation 60245 IEC 57 or heavier cable.
Models
UD03*E5* and UD05*E5*
UD07*E5* and UD09*E5*
Terminals on the indoor unit
Colour of wires
Terminals on the outdoor unit
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.
Indoor unit
Vacuum
pump
adaptor
Vacuum
pump
OPEN
Flexible cable specification
2
4 x (1.5 mm )
2
4 x (2.5 mm )
1 2 3
1 2 3
Liquid side
Two-way valve
Close
Gas side
Three-way valve
Close
CLOSE
CAUTION
Outdoor unit
Terminal
Board
1 2 3
Earth Wire
must be
longer than
others cables
for safety
reason.
Holder (Clamper)
WARNING
This equipment must be
properly earthed.