Panasonic Aquarea WH-UD09JE5-1 - Connecting refrigerant pipes to the indoor unit

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Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
Installation
6
The pipes of the refrigeration circuit are connected with are ttings. When cutting and aring
pipes, adhere to the following specications in order to avoid leakages and malfunctions.
1. Use only copper tubes conforming to the requirements of the EN 12735-1 for refrigerant
pipes used in refrigeration and air conditioning.
2. Cut the tubes to the required length using a tube cutter.
3. Remove the burrs using a reamer.
4. Hold the tube ends downwards when deburring, so that chips will not fall into the tube.
5. Insert the are nut onto the tube and only then begin aring the tube ends.
6. Check the quality of the are at the tube end: When properly ared, the internal surface of
the are will evenly shine and be of even thickness. Moreover, the surface of the are part
that comes into contact with the connection must be completely even and smooth.
2
3
4
1
7
a
9101
11
2
8
6
5
A B
A Tube expander
1 Bar
2 Handle
3 Yoke
4 Core
5 Arrow marking
6 Clamp handle
7 Bar
8 Copper tube
a 0 – 0.5 mm
B Unprofessional aring
9 Inclined
10 Surface damaged
11 Cracked
12 Uneven thickness
6.6.1 Connecting refrigerant pipes to the indoor unit
Carry out the following steps to connect refrigerant pipes to the indoor unit:
1. Determine the tube length and cut the tube to the required length using a tube cutter.
2. Remove the burr on the cut edges.
3. Insert the are nut (which, at the time of dispatch, is screwed onto the connection nozzle of
the indoor unit) onto the tube end.
4. Flare the tube ends.
5. Align the ared tube and the connecting pipe centrally and rst tighten the are nut by hand
and then with a torque wrench and an adjustable spanner to counter it. Maintain the correct
torques (→ Permissible tightening torques of refrigerant pipes (All in One units), p. 162,
→ Permissible tightening torques of refrigerant pipes (Hydrokits), p. 163).
2
1
1 Adjustable spanner
2 Torque wrench
6. Route the pipes through the wall grommet to the outdoor unit.