McQuay M5LCX Spezifikationen PDF herunterladen (Seite 47)

M5LCX-2009

Vacuuming And Charging

Purging The Piping And The Indoor Unit

Except for the outdoor unit which is pre-charged with refrigerant, 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.

• Remove the caps from the valve and the service port.

• Connect the center of the charging gauge tothe vacuum pump.

• Connect the charging gauge to the service portof the 3-way valve.

• 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

Caution

• If the gauge needle does not move to -760mmHg, be sure 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 stopthe vacuum pump.

• On the outdoor unit, open the suction valve (3way) 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. If the piping length is less than 7.62m (25ft), then additional

charge after vacuuming is not necessary. If the piping length is more than 7.62m (25ft), then use the additional

charge value as indicated in the table.

Charge operation

This operation must be done by using a gas cylinderand a precise weighing machine. The additional charge

is topped up into the outdoor unit using thesuction valve via the service port.

• Remove the service port cap

• Connect the low pressure side of the charging gauge to the suction service port center of the cylinder tank

and close the high pressure side of the gauge. Purge the air from the service hose.

• Start the air conditioner unit.

• Open the gas cylinder and low pressure charging valve.

• When the required refrigerant quantity is pumped into the unit, close the low pressure side and the gas

cylinder valve.

• Disconnect the service hose from service port. Put back the service port cap.

ip-pipe

Liquid

withdrawal

Invert cylinder

without dip-pipe

(e) Normally, the R410A cylinder or can is being equipped with a dip pipe for liquid withdrawal. However, if

the dip pipe is not available, invert the cylinder or can so as to withdraw liquid from the valve at the

bottom.

(d) When charging R410A, ensure that only liquid is being withdrawn from the cylinder or can. This is to

ensure that only the original composition of R410A is being delivered into the system. The liquid

composition can be different from the vapor composition.

Application Information

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 133 134

Kommentare zu diesen Handbüchern

Keine Kommentare

McQuay M5LCX Spezifikationen Seite 47

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Split-System-Klimaanlagen McQuay M5LCX