Connecting Refrigerant Lines; Routing Refrigerant Lines - Viessmann VITOCAL 222-S Installation And Service Instructions Manual

Installation sequence

Connecting refrigerant lines

The external unit is pre-charged with refrigerant
■
R410A.
■ In the following cases, fit oil lift bends in the rising
pipe:
– In heating mode, if the internal unit is installed
higher than the external unit: See diagram below.
In cooling mode, if the internal unit is installed
–
lower than the external unit.

Routing refrigerant lines

Type AWT/AWT-AC
Refrigerant lines
Min. line length
Max. line length
Max. height differential internal unit
nal unit
Note
No topping up is required for line lengths between 3
and 12 m.
Internal unit above external unit
A
C
B
Fig. 14
Note
Both diagrams illustrate heating mode.
Internal unit
A
Hot gas line
B
C Liquid line
22
221.A04
20 m
exter- 10 m
–
D D
E
221.A05 221.A07
3 m 3 m 3 m
30 m 30 m
15 m 15 m
Internal unit below external unit or at same level
A C
Fig. 15
External unit
D
Oil lift bends
E
221.A10 221.A13 221.B16
221.B10 221.B13
3 m 3 m
30 m 30 m
15 m 15 m
D
B
3 m
30 m
15 m