Sharp DW-71-H, Руководство по обслуживанию

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DW-71-H
(11) At first open the additional valve of gauge manifold. Then, slowly open the low pressure side and high pressure side
to evacuate the cycle. (Do not apply undue load to the vacuum pump.)
(12) Evacuate for 30 minutes (with valves opened).
(13) After completion of evacuation close all the valves.
«
«
«
1
1
1
1
2
3
4
5
6
7
7
on off
Vacuum pump stop
Check valve for
vacuum pump
Vacuum pump
for R-12
(Slowly)
Valve opening
Valve closing
(Slowly)
Valve opening
Valve closing
Valve opening
Valve closing
Valve closing
Read indication of quantity of gas filled in cylinder, and
record the specified quantity.
Valve closing
Low
pressuer High
pressuer
Gauge manifold
Low pressure pipe side
High pressure pipe side
Dehumidifier
Refrigeration cycle
Liquid side Gas side
Charging cylinder
for HFC-134a
«
«
«
on off
Check valve for
vacuum pump
Vacuum pump
for R-12
1
2
3
4
4
4
Valve opening
Valve closing
Valve opening
(Siowly)
Valve closing
Valve opening
(Siowly)
Valve closing
Valve closing Valve closing
Low
pressuer High
pressuer
Gauge manifold
Low pressure pipe side
High pressure pipe side
Dehumidifier
Refrigeration cycle
Liquid side Gas side
Charging cylinder
for HFC-134a
(14)Close the additional valve of gauge manifold, and stop the vacuum pump.
(15)Read indication of charging cylinder.
(16)Open the liquid side valve of charging cylinder to charge the specified quantity of coolant from the high pressure
valve of gauge manifold.
Adjust the quantity of charged coolant, seeing the indication of charging cylinder, with the high pressure
valve of gauge manifold.
(17)After the coolant is charged, only the low pressure valve of gauge manifold must be opened.