Viessmann AWS 104, Installation And Service Instructions For Contractors

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35
1.
!
Please note
Contamination (such as metal
swarf) or moisture must not
enter the copper pipes.
Therefore, hold the pipe open-
ings down or plug them.
Remove the nuts from the refrigerant
connections
C and D .
Type AWS/AWS-AC 107, 110, 113:
Push the nuts onto the associated
refrigerant lines from the external
unit.
Type AWS/AWS-AC 104:
Replace nuts with union nuts sup-
plied (
⁷
⁄
₁₆
UNF for liquid gas line,
¾ UNF for hot gas line).
2. Type AWS/AWS-AC 104 and 107:
Swage the pipe ends of the refriger-
ant lines.
Type AWS/AWS-AC 110 and 113:
Use solder fittings.
Note
Solder fittings using an inert gas.
3. Fit refrigerant lines and insulate them
to provide protection from heat and
vapour diffusion.
Tighten the nuts with the following torque:
Type
AWS/
AWS-AC
Line Connection to
internal unit Torque in Nm
104 Liquid gas line
7
6 mm
⅝
UNF
with reducer
⁷
⁄
₁₆
x
⅝
14–18
Hot gas line
7
12 mm
⅞
UNF
with reducer
¾ x
⅞
50–62
107 Liquid gas line
7
10 mm
⅝
UNF
33–42
Hot gas line
7
16 mm
⅞
UNF
63–77
110 Liquid gas line
7
10 mm
⅜
UNF
33–42
Hot gas line
7
16 mm ¾ UNF 63–77
113 Liquid gas line
7
10 mm
⅜
UNF 33–42
Hot gas line
7
16 mm ¾ UNF 63–77
Installation sequence
Connecting the refrigerant lines
(cont.)
5724 152 GB
Installation