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11.3.2. Connecting the Piping
Connecting The Piping To Indoor Unit
Please make flare after inserting flare nut (locate at joint portion
of tube assembly) onto the copper pipe.
(In case of using long piping)
Connect the piping
• Align the center of piping and sufficiently tighten the flare nut
with fingers.
• Further tighten the flare nut with torque wrench in specified
torque as stated in the table.
Connect The Piping to Outdoor Unit
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (located
at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.
Cutting and Flaring the Piping
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid
the metal powder entering the pipe.
3. Please make flare after inserting the flare nut onto the copper pipes.
11.3.3. Air Purging of the Piping and Indoor Unit
1) Checking a gas leakage
1. Remove the service-port cap from both 3-way valves.
2. Connect the Manifold gauge set to the service port of
Liquid side 3-way valve.
3. Connect the Charging Cylinder to the Manifold gauge set
and open the valve of the Cylinder.
4. Open the low pressure side valve of the Manifold gauge
for approx. 10 seconds and then close.
5. Check gas-leakage of the connecting portion of pipings
with the gas-leak detector.
MODEL Piping size (Torque)
Gas Liquid
C18HKQ 1/2” (55 Nxm) 1/4” (18 Nxm)
C24HKQ 5/8” (65 Nxm) 1/4” (18 Nxm)
CAUTION
Do not over tighten, over tightening cause gas leakage.
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