Electrical Safety; Gas Leak Check - White-Westinghouse WAS(C,E)09C5CRKW Instruction Manual

When using the vacuum pump
For method of using a manifold valve, refer to its operation manual.
1. Completely tighten the flare
nuts, A, B, C, D, connect the
manifold valve charge hose to a
charge port of the low-pressure
valve on the gas pipe side.
2. Connect the charge hose
connection to the vacuum pump.
3. Fully open the handle Lo of the
manifold valve.
4. Operate the vacuum pump to
evacuate. After starting
evacuation, slightly loose the
flare nut of the Lo valve on the
gas pipe side and check that the
air is entering (Operation noise
of the vacuum pump changes
and a compound meter indicates
0 instead of minus)
5. After the evacuation is complete,
fully close the handle Lo of the
manifold valve and stop the
operation of the vacuum pump.
Make evacuation for 15 minutes
or more and check that the
compound meter indicates -
76cmHg (-1x10 Pa).
6. Turn the stem of the packed
valve B about 45o
counterclockwise for 6~7
seconds after the gas coming
out, then tighten the flare nut
again. Make sure the pressure
display in the pressure indicator
is a little higher than the
atmosphere pressure.
Air purging
27
7. Remove the charge hose from the
Low pressure charge hose.
8. Fully open the packed valve stems
B and A.
9. Securely tighten the cap of the
packed valve.
Indoor unit
Outdoor unit
Manifold valve
Charge
hose
-76cm/Hg
Handle Lo Handle Hi
Charge hose
Vacuum pump

Electrical safety

Perform the electric safe check after completing installation:
1. Insulated resistance: The insulated resistance must be more than 2M
2. Grounding work: After finishing grounding work, measure the grounding
resistance by visual detection and grounding resistance tester. Make sure the
grounding resistance is less than 4
3. Electrical leakage check (performing during test running): During test operation
after finishing installation, the serviceman can use the electroprobe and
multimeter to perform the electrical leakage check. Turn off the unit
immediately if leakage happens. Check and find out the solution ways till the
unit operate properly.

Gas leak check

Soap water method
Apply a soap water or a liquid neutral
detergent on the indoor unit
connection or outdoor unit connections
by a soft brush to check for leakage of
the connecting points of th piping. If
bubbles come out, the pipes have
leakage.
Leak detector
Use the leak detector to check for
leakage.
Caution
A: Lo packed valve, B: Hi packed valve
C and D are ends of indoor unit
connection.
Electrical safety and gas leak check
.
.
indoor unit
check point
Cover
Outdoor unit
check point
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