Evacuation Of The Equipment - Panasonic CS-E9RKUAW Service Manual

11.3.2.3 Connecting the piping to outdoor multi
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge.
Make flare after inserting the flare nut (locate at valve) onto the copper pipe.
Align center of piping to valve and then tighten with torque wrench to the specified torque as stated in the table.
11.3.2.4 Gas Leak Checking
Pressure test to system to 400 PSIG with dry nitrogen, in stages. Thoroughly leak check the system.
If the pressure holds, release the nitrogen and proceed to section 11.3.3.
11.3.3

Evacuation of the equipment

WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND
PIPES in the following procedures.
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.
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 the 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 the 3-way valve.
Be sure to check for gas leakage.
o
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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.
- Be careful with the liquid refrigerant, it may cause frostbite.
Hall Union
Male side
(Auxiliary pipe)
Wrench
(Adjustable Wrench)
Hall Union
Packing
Male side
(Auxiliary pipe)
Wrench
(Adjustable Wrench)
Torque Wrench for Flare
Nut and Pipe Size Reducer
Indoor unit
OPEN
Lo
Vacuum
pump
Female side
Flare Nut
Applicable to
(Connection pipe) Liquid and Gas side of
CS-E9RKUAW
Liquid side of
CS-E12RKUAW
Torque Wrench for Flare Nut
Flare Nut
Pipe Size
Reducer
Female side
(Connection pipe)
Applicable to
Gas side of
CS-E12RKUAW
Liquid side
Two-way valve Outdoor unit
Close
Gas side
Three-way valve
Close
Hi
CLOSE
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