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Expel the air with a vacuum pump
( Refer to Chart 25)
(please refer to its manual for the way of using manifold value)
1. Loosen and remove the maintenance nuts of stop values A and B, and connect the charge hose of
the manifold value with the maintenance terminator of stop value A. (Be sure that stop values A and
B are both closed)
2. Connect the joint of the charge hose with the vacuum pump.
3. Open the Lo-lever of the manifold value completely.
4. Turn on the vacuum pump. At the beginning of pumping, loosen the maintenance terminator nut of
stop value B a little to check whether the air comes in (the sound of the pump changes, and the
indicator of compound meter turns below zero). Then fasten the nut.
5. When the pumping has finished, close the Lo-lever of the manifold value completely and turn off the
vacuum pump.
When you have pumped for over 15 minutes, please confirm that the indicator of multi-meter is on
×
-5
1.0 10 Pa(-76cmHg).
6. Loosen and remove the quadrangle cover of stop values A and B to open stop value A and B com-
pletely, then fasten them.
7. Disassemble the charge hose from the repair-mouth of stop value A, and fasten the nut.
CAUTIONS
All the stop values should be opened before test operation. Each air conditioner has two stop values
of different sizes on the side of the outdoor unit which operate as Lo-stop value and Hi-stop value,
respectively. (Refer to Chart 26)
CHECK THE LEAKAGE
Check all the joints with the leak detector or soap water. (refer to Chart 29)
NOTE: in the chart
Manifold valve
Pressure meter
Multi-meter
-76 cmHg
Lo- lev er
Charge hose
Lo-leve r
Chart 25
Flare nut
Valve body
Valve stern
A...........Lo-stop value
B...........Hi-stop value
C,D.......Joints of the connecting pipe
to the indoor unit.
H i-l ever
C harge hose
Vacuum pump
Stopper
Cap
11
Check-point of indoor unit
D
B
Check-point of outdoor unit
Chart 27
C
A
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