Electrolux EXM24HV1WE - Manual (Page 22)

22
When Using the Vacuum Pump
Gas Leakage Check
test and Running
Electrical safety Check
1 Completely tighten the flare nuts on A, B, C
and D, connect the manifold valve charge
hose (blue) to the charge port of the low
pressure valve (3-way valve) on the gas pipe
side.
2 Connect the other charge hose (yellow) of
manifold to the vacuum pump.
3 Fully open the handle Lo of the manifold
valve.
4 Open the vacuum pump for vacuumization.
At the beginning, slightly loose the flare nut
of the low pressure valve to check if there
is air coming inside (If operation noise of
the vacuum pump has been changed, the
reading of multimeter is 0 instead of minus).
Then tighten the flare nut.
5 Keep vacuuming for more than 15 minutes
and make sure the reading of multimeter is
-1.0 x 10 5 Pa (-76cmHg). Then fully close
the handle Lo of manifold valve and stop the
operation of the vacuum pump.
6 Turn the stem of the stop valve b (2-way
valve) about 45° 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 port.
8 Fully open the valve stems of A (3-way valve)
and b (2-way valve).
9 Securely tighten the stem cap.
1 Soap water method:
Apply soap water or liquid neutral detergent on
all valves and pipe connections (A, b, C and D,
refer to the figure below) involved in installation
by a soft brush to check for leakage.
If bubbles come out, the pipes have leakage.
2 Leak detector
Use the leak detector to check for leakage.
Perform the electric safe check after completing the
installation:
1 Earthing work
After finishing earthing work, measure the
earthing resistance by visual detection and
earthing resistance tester.
2 Electrical leakage check
(performing during test running)
During test operation after finishing installation,
the service person can use the electric probe
and multimeter to perform the electrical leakage
check. Turn off the unit immediately if refrigerant
leakage happens. Check and find out the
solution ways till the unit operate properly.
Outdoor Unit
Manifold
valve
Multimeter
-76cmHg
Lo Handle Hi Handle
Charging hose
Low pressure
valve
Charging
hose
Vacuum Pump
Indoor unit
check points
Liquid pipe
Gas pipe
Outdoor
Unit
Outdoor unit
check points
2-way
valve
3-way
valve
b
D
C
A