Viessmann VITODENS 100-W Installation And Service Instructions Manual page 30

Boiler Connections
Installation Examples
System Layout 3
Vitodens 100-W, WB1B 10-26, 10-35 with...
– DHW storage tank
– one heating circuit
AV
PRV
Y
4xpipe Ø
or 12" /305mm
Fig. 27
IMPORTANT
Primary pump must pump into
the boiler (as illustrated).
Please note!
The use of a low-loss header is
recommended if the water flow rate is
less than 1.7 GPM / 400 ltr/h or more
than 6.2 GPM / 1400 ltr/h.
The low-loss header is available as
accessory part.
See page 36 in this manual for details
on the low-loss header.
30
(continued)
TPV
Y
Maximum Flow Rates
Model WB1B
∆ ∆ ∆ ∆ t
Output Btu/h
30ºF rise (GPM)
35ºF rise (GPM)
40ºF rise (GPM)
AV
PRV
TPV
*
A low-loss header offers additional
benefits not provided by a pair of
closely spaced tees. Viessmann
strongly recommends and prefers the
use of a low-loss header over closely
spaced tees.
Please see page 36 for details.
10-26 10-35
83,000 108,000
5.5 ----
4.7 6.2
4.2 5.4
Air vent
Pressure relief valve
Temperature and pressure relief
valve
Vitodens 100-W gas-fired
condensing boiler
External boiler/DHW controller
(field supplied)
Heating circuit
Heating circuit pump
(field supplied)
DHW storage tank
DHW tank temperature aquastat or
sensor
DHW circulating pump
(field supplied)
Closely spaced tees, 4xpipe Ø
*
or 12" /305mm
Expansion tank
Primary pump (boiler circuit, field
supplied)