Viessmann VITODENS 100-W Installation And Service Instructions Manual page 8

Gas fired wall mounted condensing boiler natural gas version type wb1a
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Preparing for installation
Preparing for installation
System boiler
A Condensate drain: Plastic pipe
722 mm
B Heating flow: 722 mm
C DHW cylinder flow: 722 mm
D Gas connection: Rp ½
8
(cont.)
E DHW return: 722 mm
F Heating return: 722 mm
G Safety valve drain: 718 mm/
22 mm

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