Connection To The External Unit - Viessmann VITOCAL 222-S Installation And Service Instructions Manual

Installation sequence
Connecting refrigerant lines

Connection to the external unit

Fig. 17 Example type AWT/AWT-AC 221.A04
Liquid line
C
D Hot gas line
1. Undo the side cover: See page 39.
!
2. Please note
Contamination (e.g. metal swarf) or moisture
in the copper pipes of the refrigerant lines will
cause the appliance to malfunction.
Hold the pipe openings downwards or tempo-
rarily plug them.
Undo the nuts from connections
refrigerant lines (liquid line and hot gas line).
Type AWT/AWT-AC 221.A04:
Slide the nuts onto the refrigerant lines prepared on
site.
Type AWT/AWT-AC 221.A05 to A13, 221.B10 to
B16:
Replace nuts with union nuts supplied (internal
unit):
■ UNF for liquid line
⅝
■ UNF for hot gas line
⅞
24
(cont.)
2.
3.
2x
4.
and on the
C D
D
C
D
C
3. Flare the pipe ends.
4. Secure the pipes.