Installation Procedure
Piping Connection
Connecting method
Apply refrigerant oil at half union and flare nut.
To bend a pipe, give the roundness as large as possible not to crash the pipe.
When connecting pipe, hold the pipe centre to centre then screw nut on by hand, refer to Fig. 
Be careful not to let sundries, such as sands enter the pipe.
Pipe cutting and flaring | A |
|
Be sure to carry out deburring after pipe cutting with a pipe cutter.
Insert flaring tool to make a flare.
Forced fastening without centering may damage the threads and cause a gas leakage.
Flaring tool
| Pipe dia. | Dimension A |
| Fastening torque |
Liquid pipe | 9.52mm (3/8") | 1.0 ~ 1.8(mm) | ||
Gas pipe | 19.05mm (3/4") | 1.4 ~ 2.2(mm) | ||
Correct |
| Incorrect |
|
|
Lean Damaged flare Crack | Partial Too outside | |||
Piping connection of indoor unit 1.Arrangement of piping and drainage pipe
After opening inlet grill, you will see a control box as shown in the Fig. Remove the cover before wiring work.
Cut away, with a hammer or a saw, the lid for piping according to piping direction.
According to the piping method, connect the piping on indoor unit with union of connecting pipe.
Arrange the piping as per the wall hole and bind drain hose, connecting electric cable and piping together with polyethylene tape.
Insert the bound piping, connecting electric cable and drain hose through wall hole to connect with outdoor unit.
control box
Insulation material Copper tube
Drain hose
Connecting electric cable for indoor and outdoor unit
2.Arrangement of drain hose
Drain hose shall be placed in under place.
There should be a slope when arrange drain hose. Avoid up and down waves in drain hose.
If humidity is high, drain pipe( especially in room and indoor unit ) must be covered with insulation material.
Indoor unit
Slope
Up
Good | Down | Bad |
Piping connection of outdoor unit.
Connect the connecting pipe and inlet / outlet liquid pipe according to the piping method.
Vacuumizing
Discharge the air out of the indoor unit and the refrigerant pipe by vacuumizing.
(1)Fasten all the nuts of the indoor and outdoor pipes to make these parts out of leakage.
(2)Under the condition of the complete close of the indoor and outdoor valve center (both liquid and gas side), dismount the service valve cap. Vacuumizing through the charge mouth of the service valve.
(3)After vacuumizing, fasten the service valve and dismount the cap of the big and small stop valve, then loosen the stop valve center completely and fasten the big and small stop valve.
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