Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 7

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Requirements regarding on-site connections
Internal unit
600
475
62
Fig. 1
Opening for LV leads < 42 V
A
DHW
B
DHW circulation
C
Opening for 230 V cables
D
Cold water
E
Connection sizes for hydraulic connections
Pos.
Sym-
Meaning
bol
DHW
B
DHW circulation
C
E
Cold water
405
147
69
300
387
680
Liquid line
F
Hot gas line
G
Heating water flow
H
Heating water return
K
Connection to the internal unit
Preparing for installation
Rp
G 1
Rp
¾
¾
7

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