28
2.
Flare the pipe ends of the refrigerant lines.
or
Braze the solder connection of the Euro flanged
adaptors (accessories) using shielding gas.
3.
Secure the refrigerant lines. Tighten the nuts with
the torques shown in the following table.
4.
Apply thermal and vapour diffusion-proof insulation
to the refrigerant lines.
Torque for refrigerant lines
Type AWBT(-M),
AWBT(-M)-E-AC
Line
Connection to the
outdoor unit
Torque in Nm
221.C04
221.C06
Liquid line
7
6 mm
⅝
UNF
with reducer
33 to 42
⅝
x
⁷
⁄
₁₆
14 to 18
Hot gas line
7
12 mm
⅞
UNF
with reducer
63 to 77
⅞
x
¾
50 to 62
221.C08
221.C10
221.C13
221.C16
Liquid line
7
10 mm
⅝
UNF
33 to 42
Hot gas line
7
16 mm
⅞
UNF
63 to 77
Connecting the secondary circuit
Preparing connections on the heating water side
Equip the heating system on site with an expansion
vessel in the heating return.
The expansion vessel must be approved to EN 13831.
Note
■
With underfloor heating circuits, install a temperature
limiter to restrict the maximum temperature of under-
floor heating systems.
■
Ensure the minimum flow rate, e.g. by means of an
overflow valve: See "Specification".
Installation sequence
Connecting the refrigerant lines
(cont.)
51
17 700 GB
Installation
