26
TM-FT
-0415-B
Vacuuming is necessary to eliminate all moisture and air from the system.
Refrigerant Piping
Outdoor Unit 3 ways valve
Allen key
Service Port
Flare nut
HIGH PRESSURE GAUGE
GAUGE MANIFOLD
LOW PRESSURE GAUGE
HANDLE HI (ALWAYS CLOSED)
CHARGE HOSE
-760mmHg
HANDLE LO
CHARGE HOSE
VACUUM PUMP
ADAPTER FOR
COUNTER FLOW
PREVENTION
CHECK
VALVE
LIQUID
VALVE
HIGH PRESSURE GAUGE
LOW PRESSURE GAUGE
GAUGE MANIFOLD
-760mmHg
HANDLE LO
HANDLE HI (ALWAYS CLOSED)
CHARGE HOSE
CHARGE HOSE
CHECK
VALVE
LIQUID
VALVE
GAS VALVE
(3-WAY)
CONFIGURATION OF AIR PURGE
BY CHARGING
GAS VALVE
(3-WAY)
CONFIGURATION OF AIR PURGE
BY CHARGING
Vacuuming And Charging
Vacuuming The Piping And The Indoor Unit
Except for the outdoor unit which is pre-charged
with refrigerant, the indoor unit and the refriger-
ant 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 2-way valve.
• Start the vacuum pump. Evacuate for approxi-
mately 30 minuted. 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 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.
