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.
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.
Electrical safety
Perform the electric safe check after completing installation:
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.
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.
Cover
indoor unit
check point
Outdoor unit
check point
Manifold valve
Compound meter
-76cmHg
Handle Lo
Handle Hi
Charge hose
Charge hose
Vacuum pump
Pressure gauge
Low pressure valve
27 electrolux
air purging
electrical safety
electrolux 28
