Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 26

Installation sequence
Connecting the refrigerant lines
Connection to the outdoor unit
2.
C
D
4.
C
D
Fig. 23
Liquid line
C
Hot gas line
D
1. Remove the side cover: See page 19.
2. Undo the nuts from connections
(hot gas line) of the refrigerant lines.
D
Types 221.C04 and 221.C06:
Slide the nuts onto the refrigerant lines prepared
on site.
Types 221.C08 to 221.C16:
Replace nuts with union nuts supplied (indoor unit):
■ UNF for liquid line
⅝
■ UNF for hot gas line
⅞
!
Please note
Contamination (e.g. metal swarf) or moisture
in the refrigerant lines will cause the appli-
ance to malfunction.
Point the pipe openings downwards or tem-
porarily plug them.
26
(cont.)
3.
2x
3. Flare the pipe ends of the refrigerant lines.
(liquid line) and
C
4. Secure the refrigerant lines. Tighten the nuts with
5. Apply thermal and vapour diffusion-proof insulation
or
Braze the solder connection of the Euro flanged
adaptors (accessories) using shielding gas.
the torques shown in the following table.
to the refrigerant lines.