Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 35

Connecting refrigerant lines
Example: type AWT-AC 221.A04
C Liquid line
!
2. Please note
No contamination (e.g. metal
swarf) or moisture should
enter the copper pipes.
Therefore, hold the pipe open-
ings downwards or tempora-
rily plug them.
Undo the nuts from connections C
and D on the refrigerant lines (liquid
line and hot gas line).
Type AWT-AC 221.A04:
Slide the nuts onto the refrigerant
lines prepared on site.
Type AWT-AC 221.A07, A10 and
A13:
Replace nuts with the supplied union
nuts (internal unit) (⅝ UNF for liquid
line, ⅞ UNF for hot gas line).
(cont.)
2.
3.
2x
4.
D Hot gas line
3. Flare the pipe ends.
4. Secure the pipes.
Installation sequence
D
C
D
C
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