Connecting The Cooling Circuit - Panasonic Aquarea B1 Planning And Installation Manual

Installation
Removing top cover plate and replacing it
Carry out the following steps to remove the top cover plate of the outdoor unit or compact
device:
1. Remove the attachment screws (1) along the edge of the cover plate (2).
2. Lift the cover plate from the device (3).
3. To replace the top cover plate, proceed in the reverse order.
3
1
2
1
6.6

Connecting the cooling circuit

i
Note
For the installation of compact devices, you can skip chapter 6.6 "Connecting the cooling cir-
→ 6.7 Connecting the heating circuit, p.
cuit". Continue with section
152
Aquarea air-to-water heat pumps - Planning and installation manual - 01/2018
1
A compact device of the B8* model is shown as an
example. For compact devices of the B9* model and for
outdoor units, proceed in exactly the same manner as
appropriate.
* cfr. → 1 Model range, p. 8
161.
Defaults for correctly configured flange connections
CAUTION
Danger of leakages due to incorrect tool
Using a wrong tool, e.g. a pipe wrench, can deform or damage the cap nut. This can cause
leakages.
► Use a suitable adjustable spanner or ring spanner.
Danger of leakages caused by exceeding the tightening torque
Too high a tightening torque can cause deformation and consequently leakages.
► Observe the correct torque when tightening the cap nut (→
torques of the coolant pipelines - Combination hydro-module H-Generation, p.
→ Permissible tightening torques of the coolant pipelines - hydro-module H-Genera-
tion, p. 157, → Permissible tightening torques of the coolant pipelines - outdoor units,
p. 159).
The pipelines of the cooling circuit are connected with flange connections. When cutting and
flanging pipes, adhere to the following specifications in order to avoid leakages and device
faults.
1. Insert only copper tubing conforming to the requirements of the EN 12 735-1 for coolant
pipelines used in refrigeration and air conditioning.
2. Cut the tubes to the required length using a tube cutter.
3. Remove the burr using a deburrer.
4. Hold the tube ends downwards when deburring, so that chips will not fall into the tube.
5. Push up the flange nut and only then begin flanging the tube ends.
6. Check the quality of flanging: Correctly executed flanging is uniformly thick and shines.
Moreover, the contact surface that lies on the connecting piece must be completely
smooth.
A
2
3
1
4
6 5
A Tube expander
1 Lock
2 Handle
3 Yoke
4 Core
Aquarea air-to-water heat pumps - Planning and installation manual - 01/2018
Installation
Permissible tightening
156,
B
a
7
8
9 10 11
B Unprofessional flanging
5 Arrow marking 9 Skew
6 Clamp handle 10 Surface damaged
7 Lock 11 Ripped
8 Copper tube 12 Nonuniform thickness
a 0 – 0.5 mm
12
153