Viessmann VITODENS 100-W Installation And Service Instructions Manual page 11

Fitting the boiler and making connections
Making connections on the water side
A B C
¨
A Heating flow G¾
B Hot water G½
Gas connection
D E
A
Installation sequence
(cont.)
C Gas connection G¾
D Cold water G½
E Heating return G¾
For fittings on the heating water
side and DHW side, see separate
installation instructions.
1. Connect gas shut-off valve to con-
nection A.
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