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COMMISSIONING
The necessary filling amount of refrigerant
Please record the quantity added and store it carefully for future maintenance .
Model
Less than 5 m (one-way)
Added refrigerant when over 5 m (one-way)
Expel the air with a vacuum pump (refer to chart 38)
(Please refer to its manual for the way of using manifold valve)
1.
Loosen and remove the maintenance nuts of stop valves A and B, and connect the charge hose of the manifold valve with the
maintenance terminator of stop valve A . (Be sure that stop valves 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 valve completely .
4.
Turn on the vacuum pump . At the beginning of pumping, loosen the maintenance terminator nut of stop valve 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 valve completely and turn off the vacuum pump.
•
When you have pumped for over 15 minutes, please confirm that the indicator of multimeter is on -1.0X10-5Pa (-76cmHg)
6.
Loosen and remove the quadrangle cover of stop valves A and B to open stop valve A and B completely, then fasten them .
7.
Disassemble the charge hose from the repair-mouth of stop valve A, and fasten the nut .
Manifold valve
Multi-meter
Lo-lever
(Take size 24 as example)
Chart 38
Cautions
All the stop valves should be opened before test operation . Each air conditioner has two stop valves of different sizes on the side
of the outdoor unit which operate as Lo-stop value, respectively . (Refer to Chart 39)
vacuum dry and leakage checking
1.
Vacuum Dry: use vacuum pump to change the moisture
(liquid) into steam (gas) in the pipe and discharge it out of the
pipe to make the pipe dry . Under one atmospheric pressure,
the boiling point of water(steam temperature) is 00 . Use
vacuum pump to make the pressure in the pipe near vacuum
state, the boiling point of water falls relatively . When it falls
under outdoor temperature, the moisture in the pipe will be
vaporized .
• 2 •
Pressure meter
Hi-lever
Charge hose
Vacuum pump
12
18
-
-
30g x (L-5)
g x (L-5)
Valve body
Vavle stern
Chart 39
24
30-60
-
-
30g x (L-5)
60g x (L-5)
Flare nut
Stopper
Cap
Necessary
vaccuum
degree
DUCTAIR II - 0808-E
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