COMPLETING THE INSTALLATION
Connecting Up and Purging the Circuit
The outdoor unit is loaded with sufficient R22 refrigerant for 5m(16ft. 5in) of piping. The air in the indoor unit and in the pipe must be purged.
If air remains in the refrigeration pipes, it will affect the compressor, reduce to cooling capacity and could lead to a malfunction. Refrigerant for air purging is not charged in the outdoor unit.
Use Vacuum Pump as shown at the figure.
1Connect each assembly pipe to the appropriate valve on the outdoor unit and tighten the flare nut.
2Referring to the illustration opposite, tighten the flare nut first manually and then with a wrench, applying the following torque.
Pipe | Outer Diameter | Torque |
Liquid refrigerant | 6.35 mm(1/4˝) | 160kg•cm(11.6ft•lb ) |
Gas refrigerant | 9.52 mm(3/8˝) | 300kg•cm(21.8ft•lb ) |
Gas refrigerant | 12.70 mm(1/2˝) | 500kg•cm(36.4ft•lb ) |
3Connect the charging hose of low pressure side of manifold gauge to the packed valve having a service port as shown at the figure.
4Open the valve of the low pressure side of manifold gauge counterclockwise.
5Purge the air from the system using vacuum pump for about 10 minutes.
-Close the valve of the low pressure side of manifold gauge clockwise.
-Make sure that pressure gauge show
-10minutes.
-This procedure is very important in order to avoid gas leak.
-Turn off the vacuum pump
-Remove the hose of the low pressure side of manifold gauge.
6Set valve cork of both liquid side and gas side of packed valve to the open position.
7Mount the valve stem nuts and the service port cap to the valve, and tighten them at the torque of 18N•m with a torque wrench.
8Check for gas leakage.
-At this time, especially check for gas leakage from the
ENGLISH
Outdoor unit | Indoor unit | |
A | Gas pipe side | C |
B | Liquid pipe side | D |
Indoor
Indoor
A 
B
Vacuum Pump
❊The designs and shape are subject to change according to the model.
Valve stem
Liquid side
Stem cap
Gas side
Service port
You can install 15m of connecting pipe to the maximum, and you don’t have to charge any additional refrigerant.
