E-9
ENGLISH
Lo
Hi
Connection of pipe
1 Align the flared end of the copper pipe with the center of the thread joint. Manually tighten the
flared end nut.
2 Use torque wrench to tighten the flaring nut until the wrench clatters.
Pipe Diameter
Pipe thickness
Tightening torque
/4"
0.8mm
6±2 (N·m)
3/8"
0.8mm
38±4 (N·m)
/2"
0.8mm
55±6 (N·m)
5/8"
.0mm
75±7 (N·m)
3/4"
.2mm
0±0 (N·m)
3 The bending angle of the pipe shall not be too large, and otherwise the pipe may break. Use a
pipe bender to bend the pipe.
4 Wrap the refrigerant pipe and joint in sponge, then bind the sponge with plastic tape.
Air removal
Remove both valve shaft caps of the stop valves.
2 Remove the service port cap of the stop valve (gas side).
3 Connect the gauge manifold hose to the service port and the vacuum pump.
Be sure that the hose end to be connected to the service port has a valve core pusher.
4 Open the gauge manifold valve and operate the vacuum pump for 0-5 minutes.
Make sure the compound gauge reads -76cmHg.
5 Close the gauge manifold valve.
6 Turn off the vacuum pump.
7 Fully open the stop valve (liquid side) with hexagon socket screw key. (diagonally 4 mm)
Turn all the way up to contact.
8 Fully open the stop valve (gas side) with hexagon socket screw key. Turn all the way up to con-
tact.
9 Disconnect the gauge manifold hose from the service port.
0 Replace the service port cap and both valve shaft caps tightly.
Notes:
• Use a gauge manifold and hoses exclusive for R40A.
• After air removal, check the tube connections for gas leak using a leakage detector or soapy water.
Regarding leakage detector, use high-sensitivity type designed specially for R40A.
Pipe for Indoor
Unit
Flaring Nuts
Pipe
Wrench
Torque Wrench
Remove
Remove
2 Remove
3 Connect
4 Operate
4 Open
5 Close
6 Turn off
7 Fully open
8 Fully open
9 Disconnect
0 Replace
0 Replace
0 Replace
Gauge manifold
Compound gauge
Vacuum pump
adapter
Vacuum pump
Service port cap
Stop valve (gas side)
Stop valve (liquid side)
Cap
Cap
Hexagon socket
screw key
INDOOR UNIT
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