Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 24

Installation sequence
Connecting the refrigerant lines
Indoor unit below outdoor unit
A
E
Fig. 20 Example of cooling mode: With oil lift bends
Indoor unit
A
Hot gas line (suction gas)
B
Liquid line (LPG)
C
Outdoor unit
D
Oil lift bends
E
Wall outlet
F A
B
C
D
E
2 - 5°
Fig. 21
Outside the building
A
Wall
B
PVC or PE pipes, etc.
C
Closed cell diffusion-proof thermal insulation
D
Refrigerant lines
E
Inside the building
F
Routing the refrigerant lines
■ Max. height differential, indoor unit
unit:
15 m
Min. line length:
■
3 m
Max. line length:
■
Heating mode
– All types: 30 m
Cooling mode
– 221.C08 and 221.C08: 25 m
All other types: 30 m
–
24
(cont.)
C D
B
outdoor
–
The indoor and outdoor units are connected to the
refrigerant lines and the connecting cable. Wall outlets
are required for this purpose. With these wall outlets,
be aware of load bearing sections, lintels, damp proof-
ing elements (e.g. vapour barriers), etc.
Note
In order to prevent structure-borne noise transmission,
the refrigerant lines must not come into contact with
PVC or PE pipes.
Note
No additional charging is required for line lengths up to
12 m: See page 63.