21
STEP 5: Testing
Compare the edging of the pipe with the picture below.
In the case of damaged edging, cut the part off and repeat the edging procedure.
1
Circular edging of the pipe of the
same length.
4
Inclined edge
2
Circularly smooth edge
5
Uneven surface
3
Interior edge and surface without
scratches
6
Cracked / rough
7
Unequal thickness
Connecting the pipe-refrigerant connection on the interior device
STEP 1: Determine the direction of the pipe connection
Connect the connecting pipes to the device from below (wall unit of HM). In the case of the HM
model with integrated boiler, make the connection from above.
In the case of WSL141 and HM142 S1
STEP 2: Pipe connection
Remove the side (see chapter 4.2.3)
Align the end of the connection pipe with the middle of the pipe from indoor unit and then tighten
the screw nut by hand.
Tighten the screw nut with a torque wrench until it clicks.
Prescribed torques for tightening:
External diameter
Torque
[mm]
[inch]
[Nm]
9.52
3/8
34
– 42
15.88
5/8
65
– 81
