Viessmann AWT-AC 221.A04, Installation And Service Instructions Manual

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27
Tighten nuts with the following torque:
Type AWT-AC Line
Connection
to external
unit Torque in Nm
221.A04 Liquid line
7
6 mm
⁷
⁄
₁₆
UNF
14–18
Hot gas line
7
12 mm ¾ UNF 50–62
221.A07 Liquid line
7
10 mm ⅝ UNF 33–42
Hot gas line
7
16 mm ⅞ UNF 63–77
221.A10 Liquid line
7
10 mm ⅝ UNF 33–42
Hot gas line
7
16 mm ⅞ UNF 63–77
221.A13 Liquid line
7
10 mm ⅝ UNF 33–42
Hot gas line
7
16 mm ⅞ UNF 63–77
221.B10 Liquid line
7
10 mm ⅝ UNF 33–42
Hot gas line
7
16 mm ⅞ UNF 63–77
221.B13 Liquid line
7
10 mm ⅝ UNF 33–42
Hot gas line
7
16 mm ⅞ UNF 63–77
Connection to the internal unit
Note
We recommend using the pipe bends
supplied for connecting the refrigerant
lines. Depending on the installation con-
ditions, it may also be possible to con-
nect the refrigerant lines directly without
bends.
Installation sequence
Connecting refrigerant lines
(cont.)
5782 201 GB
Installation