Connections; Connecting Power; Boiler Venting; Proper Piping Practice - Viessmann B2HB 45 Installation Instructions Manual

Boiler Connections

Connections

2 imperfect threads
Manual gas shutoff
18
Leave 2 threads bare
Closed
Open
Vitodens 200-W B2HB 45, 57 Installation

Connecting power

The Vitodens 200-W boiler has a external accessories
connection box installed, which requires a 120VAC/12A
power supply. Refer to the wiring diagram (see page 44).

Boiler venting

The Vitodens 200-W B2HB boiler comes with a pre-installed
vent pipe adaptor.
Run venting system, single-wall or coaxial, through the
side wall or the roof, taking the shortest possible route
and at a rising angle (min. 3º).
WARNING
Remove outer gasket if single wall (boiler room air
dependant) venting system is used.

Proper piping practice

Support piping by proper suspension method. Piping
must not rest on or be supported by boiler. Use moderate
amount of dope.

Gas shut-off valve connection

1. Make gas connections in accordance with codes
CAN/CSA B149.1 and .2 or National Fuel Gas Code
ANSI Z223.1/NFPA 54, as well as local codes.
2. Connect gas shutoff valve to the boiler gas
connection.
3. Once connected close gas shutoff valve on boiler.
See following page for details on gas
connection and piping.