48
D Series Modular Air-cooled Scroll Chillers
Service Manual
6. Reinstall
the electronic
H[SDQVLRQ
valve coil and
vacuum the
system and
then charge
refrigerant
and lastly
put the
panel back
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The coil shall be matched with the valve
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T
he degree of vacuum shall be kept as low
as -1.0 bar.
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The refrigerant charge and quality shall comply
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valve, energize the unit again.
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Reinstall the panel.
4 ROUTINE MAINTENANCE
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(1). Refrigerant Leakage
Suds is usually used for the leakage test by applying it at the spot (soldering spots, valve pistols,
connectors) where leakage is probably to occur. During the test, if soap bubbles pop up, it indicates leakage
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charge can be checked by measuring the suction and discharge pressure. Leakage test should be performed
wherever leakage occurs or some components of the refrigeration system are replaced.
There are two difference conditions for charging refrigeration stated as below.
ƹ
Complete charging
In this case, take a leakage test by charging hi-pressure nitrogen (15~20kg) or refrigerant into the system. If
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and vacuumed prior to charging.
a. Connect the manifold gage.
b. Vacuum the system with a vacuum pump.
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Step 2: Connect the pipeline at both the high and low pressure sides of the manifold gage as shown in the
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of the manometer at the low side.
Manifold gage
Hi-pressure gage
Low-pressure gage
Vacuum pump
Pipeline
Pipeline
Pipeline
ТОО "Everest climate" г. Алматы, Варламова 1а, тел.+7 727 230 00 10, e-mail: info@aircon.kz, сайт:www.aircon.kz
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