McQuay M5MSX Especificaciones descargar pdf (Pagina 24)

M5MSX-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 are valve and the service. Take note that there are a total of two service ports

for M5MSX020A/AR, three service ports for M5MSX025A/AR and four service ports for M5MSX030A/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. Conrm 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 are 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 specic 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

Low

Application Information

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