Connecting Refrigerant Pipes To The Indoor Unit - Panasonic Aquarea WH-ADC0309J3E5 Planning And Installation Manual

The pipes of the refrigeration circuit are connected with flare fittings. When cutting and flaring
pipes, adhere to the following specifications 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 flare nut onto the tube and only then begin flaring the tube ends.
6. Check the quality of the flare at the tube end: When properly flared, the internal surface of
the flare will evenly shine and be of even thickness. Moreover, the surface of the flare part
that comes into contact with the connection must be completely even and smooth.
A Tube expander
1 Bar
2 Handle
3 Yoke
4 Core

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 flare 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 flared tube and the connecting pipe centrally and first tighten the flare 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 (Hydrokits), p.
6. Route the pipes through the wall grommet to the outdoor unit.
Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
A
2
3
1
4
6 5
5 Arrow marking
6 Clamp handle
7 Bar
8 Copper tube
a 0 – 0.5 mm
(→ Permissible tightening torques of refrigerant pipes (All in One units), p.
1
2
a
7
8
9
1 Adjustable spanner
2 Torque wrench
Installation
B
10 11 12
B Unprofessional flaring
9 Inclined
10 Surface damaged
11 Cracked
12 Uneven thickness
162,
163).
6
159