Evacuation Of The Equipment - Panasonic PAPAMY1604017CE Service Manual

10.6 Evacuation of the Equipment

WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR 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 gas side 3-way valve.
2 Connect the micron gauge between vacuum
pump and service port of outdoor units.
3 Turn on the power switch of the vacuum pump
and make sure that connect digital micron
gauge and to pull down to a value of
500 microns.
4 To make sure micron gauge a value
500 microns and close the low side valve of
the charging set and turn off the vacuum
pump.
5 Disconnect the vacuum pump house from the
service port of the 3-way valve.
6 Tighten the service port caps of gas side
3-way valve at a torque of 13.3 Ibf•ft (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
(5/32" (4 mm)).
8 Mount valve caps onto the 2-way valve and
3-way valve.
Be sure to check for gas leakage.
o

If micron gauge value does not descend 500 microns, take the following measures:
- If the leak stops when the piping connections are tightened further, continue working from step 3.
- 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 when handling the liquid refrigerant, it may cause frostbite.
Indoor Unit
Indoor Unit
Vacuum
pump
19
Tube connector
Liquid side
Tube connector
Gas
side
Tube connector
Liquid side
Tube connector
Gas
side
Liquid side 3-way valve
Close
Gas side 3-way valve
Close
Outdoor unit