7
English
Model
10m/32.8ft
12m/39.4ft
15m/49.2ft
FT20FV1M / FT25FV1M
35
65
-
FT28FV1M/FT35FV1M
FT50FV1M
35
65
-
FT60FV1M9
90
165
280
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 valve as indicated in the table.
Charge Operation
This operation must be done by using a gas cylinder and a precise weigh-
ing 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.
Additional charge in gram (For R22 models)
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 malfunc-
tion 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. 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 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.
Refrigerant Piping
Service Port
Outdoor Unit 3 Ways Valve
Flare Nut
Allen Key
Suction
valve
Discharge
Valve
Indoor Unit
Outdoor Unit
Liquid side
Gas side
Vacuum
pump
Open
Close
Close
Close
Hi
Low
Liquid Side
Indoor Unit
Outdoor Unit
Gas Side
Vacuum
Pump
Open
Close
Hi
VACUUMING AND CHARGING
Open
Open
Suction
Valve
Discharge Valve
Indoor Unit
Outdoor Unit
Liquid side
Gas side
Check
Valve
Close
Hi
Low
Indoor Unit
Liquid Side
Outdoor Unit
Gas Side
Check
Valve
Low
Close
Hi
