Viessmann VITODENS 100-W Installation And Service Instructions Manual page 7

Preparing for installation
Preparing for the boiler installation
Dimensions and connections
400
5
A B C D
F
58 58
123 123
A Heating flow
B Gas condensing boiler:
Cylinder flow
Gas condensing combi boiler:
DHW
C Gas connection
D Gas condensing boiler:
Cylinder return
Gas condensing combi boiler:
Cold water
(cont.)
E
Preparing for installation
350
156
34
125
E Heating return
F Condensate drain/safety valve
drain: Plastic hose 7 22 mm
7