Acson international A5MSX 20 A, Руководство пользователя

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21
A5MSX-2009
Vacuuming And Charging
Purging The Piping And Indoor Unit
Except for the outdoor unit which is pre-charged with refrigerant R22, the indoor unit and the refrigerant
connection pipes must be air-purged because the air containing moisture that remains in the refrigerant cycle
may cause malfunction of the compressor.
• Make sure all pipes are connected securely to the outdoor and indoor valves.
• Remove the caps from the flare valve and the service. Take note that there are a total of two service ports
for A5MSX20A/AR, three service ports for A5MSX25A/AR and four service ports for A5MSX30A/AR.
• Connect the center of the charging gauge to the vacuum pump.
• Starting from the bottom 3-way valve (labeled A), connect the charging gauge to the 3-way valve’s service
port. (The numbers of service ports depend on the O/D unit model).
• Start the vacuum pump. Evacuate for approximately 30 minutes. The evacuation time varies with different
vacuum pump capacity. Confirm that the charging gauge needle has moved towards -760mmHg.
• Proceed to the next 3-way valve and repeat the steps above.
Caution
• If the gauge needle does not move to - 760mmHg, be ure to check for gas leaks (using the refrigerant
detector) at flare type connection of the indoor and outdoor unit and repair the leak before proceeding
to the next step.
• Close the valve of the charging gauge and stop the vacuum pump.
• On the outdoor unit, open the suction valve (3 way) and liquid valve (2 way) (in anti-clockwise direction) with
4mm key for hexagon sacked screw.
Additional Charge
The refrigerant is pre-charged in the outdoor unit for specific piping length. Please refer to page 1-5 for further
detail on additional charge.
Service Port
Outdoor Unit 3 ways valve
Flare nut
Refrigerant Piping
Allen key
Suction
valve
Discharge
Valve
Indoor Unit
Outdoor Unit
Liquid side
Gas side
Vacuum
pump
Open
Close
Close
Close
Hi
Low
Application Information