Acson E Series - Page 22

19
Application Information A5LCY-E-2010
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 to the vacuum pump.
Connect the charging gauge to the service port of the 3-way valve.
Start the vacuum pump. Evacuate for approximately 30 minutes. The evacuation time varies with different
vacuum pump capacity. Confi rm that the charging gauge needle has moved towards -760mmHg.
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
Caution
If the gauge needle does not move to -760mmHg, be sure to check for gas leaks (using the refrigerant detector) at
fl 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.
•
•
•
Charge Operation
This operation must be done by using a gas cylinder and a precise weighing machine. The additional charge
is topped-up into the outdoor unit using the suction 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.
Open
Open
Suction
valve
Discharge valve
Indoor Unit
Outdoor Unit
Liquid side
Gas side
Check
valve
Close
Hi
Low
•
•
•
•
•
•
•
•
•
•