Kaden KDI42, Руководство по установке, Страница: 24 / 40

24 | Kaden Installation Manual
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first, then connect
it to the outdoor unit. You should first connect the low pressure
pipe, then the high pressure pipe.
1. When connecting the flare nuts, apply a thin coat of
refrigeration oil to the flared ends of the pipes.
2. Align the centre of the two pipes that you will connect.
Fig. 7.8
3. Tighten the flare nut as tightly as possible by hand.
4. Using a spanner, grip the nut on the unit tubing.
5. While firmly gripping the nut, use a torque wrench to tighten
the flare nut according to the torque values in Table 7.2 .
NOTE: Use both a spanner and a torque wrench when
connecting or disconnecting pipes to/from the unit.
Fig. 7.9
CAUTION
• Ensure that you wrap insulation around the piping.
Direct contact with the bare piping may result in burns
or frostbite.
• Make sure the pipe is properly connected.
Over-tightening may damage the bell mouth and
under-tightening may lead to leakage.
Note on minimum bend radius
Carefully bend the tubing in the middle according to the
diagram below.
Do not
bend the tubing more than 90° or
more than 3 times.
Fig. 7.10
6. After connecting the copper pipes to the indoor unit, wrap
the power cable, signal cable and the piping together with
binding tape.
NOTE: Do not intertwine signal cable with other wires.
While bundling these items together, do not intertwine or
cross the signal cable with any other wiring.
7. Thread this pipeline through the wall and connect it to the
outdoor unit.
8. Insulate all the piping, including the valves of the
outdoor unit.
9. Open the stop valves of the outdoor unit to start the flow of
the refrigerant between the indoor and the outdoor unit.
CAUTION
Check to make sure there is no refrigerant leak after
completing the installation work. If there is a refrigerant
leak, located and repair the leak before evacuating the
system (refer to the Leak testing and evacuation section
of this manual).
Flare nut Pipe Indoor unit tubing
Bend the pipe with thumb
Min radius 10cm