Vacuuming And Charging - Daikin C-Serie Installationshandbuch

Vacuuming is necessary to eliminate all moisture and air from the system.
Vacuuming 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.
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 changing 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.
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VACUUMING AND CHARGING

1-16
Allen Key
Flare Nut
Service Port
Outdoor Unit 3 Ways Valve
Low Pressure Gauge
High Pressure Gauge
-760mmHg
Handle HI
Handle LO (Always Closed)
Charge Hose
Liquid Valve
Gas Valve
(3-way)
CONFIGURATION OF AIR
PURGE BY CHARGING
Low Pressure Gauge High Pressure Gauge
-760mmHg
Handle HI
Handle LO (Always Closed)
Charge Hose
Liquid Valve
Gas Valve
(3-way)
CONFIGURATION OF AIR
PURGE BY CHARGING
Refrigerant Piping
Gauge Manifold
Charge Hose
Vacuum Pump
Adapter
For Counter Flow
Prevention
Check
Valve
Gauge Manifold
Charge Hose
Check
Valve
10/9/12 9:42:54 AM 10/9/12 9:42:54 AM