Boiler Connections
15
Preparing the Connections
(continued)
Dimensions overview with connections
This section constitutes an overview only! Refer to subsequent sections for
detailed information on individual piping connections.
Piping connections for Vitodens
100-W, WB1A 8-24 and 8-30 (factory
supplied)
Legend
BWR Boiler water return, ¾”
BWS Boiler water supply, ¾”
BD
Boiler drain
BF
Boiler fill
GC
Gas connection, ¾” NPTM
(male thread)
PRV
Pressure relief valve
PG
Pressure gage
VC
Venting connection
5
5
8
1
7
7
5
1
.3
14” /
355mm
15¾” /
400mm
2
7
/
8
” / 73mm
5
3
/
8
”
/
1
3
7
m
m
2
7
½
”
/
7
0
0
m
m
3
3
”
/
8
3
8
m
m
1
2
”
/
3
0
0
m
m
2¼”
or
2
7
/
16
”
/
58mm
or
62 mm
6” /
152mm
4
7
/
8
” /
123mm
4
7
/
8
” /
123mm
VC
PRV
BD
GC
PG
BF
BWS
BWR
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