Heating Water Connections - Viessmann VITODENS 100-W WB1B Series Installation And Service Instructions Manual

Boiler Connections
Connections

Heating water connections

PRV
BD
Fig. 18
Legend
BWR Boiler water return, ¾"
BWS Boiler water supply, ¾"
BD Boiler drain
BF Boiler fill
GC Gas connection, ¾" NPTM
PRV Pressure relief valve
NPT National Pipe Thread
PG Pressure gage
22
(continued)
PG
NPT
BWS
GC
BWR
BF
1. Thoroughly flush heating system
(particularly before connecting the
boiler to an existing system).
2. Connect boiler to the heating
system.
Max. operating pressure..........3 bar/
Test pressure.........................4 bar/
IMPORTANT
Damage resulting from pressure
exceeding those values stated is not
covered by Viessmann warranty.
Use a two-hand wrench method
g
when tightening fittings or piping
onto the boiler connectors. Use
one wrench to prevent the boiler
pipes from twisting and the
second wrench to tighten the
fitting or piping. Failure to support
the boiler connection could
damage the boiler and its internal
piping.
WARNING
The pressure gage is a sensitive
component and may be damaged
if the boiler connections are not
supported by using a second
wrench when tightening fittings
and/or piping.
All plumbing must meet or exceed
g
all local state and national
plumbing codes.
IMPORTANT
SUPPORT ALL PIPING USING
HANGERS. DO NOT support piping by
the unit or its components.
Use isolation valves to isolate
g
system components.
45 psig
60 psig