Viessmann WB1A Series Installation And Service Instructions Manual page 28

Boiler Connections
Installation Examples
System Layout 1
Vitodens 100-W, WB1A 8-24, 8-30 with...
– one heating circuit
T- - T
AV
PRV
System Layout 1 - Alternate Option
T- - T
AV
PRV
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.
28
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(continued)
*
Model No.
Vitodens 100,
WB1A 8-24
WB1A 8-30
Legend
AV Air vent
PRV Pressure relief valve
*
IMPORTANT
Ensure that a pressure activated
by-pass is installed. Refer to the table
for the DIP switch setting on page 38.
Max. flow rate
(GPM/ltr/h)
6.2/1400
6.2/1400
Vitodens 100-W
Room thermostat
Heating circuit
Heating circuit pump (field
supplied)
Expansion tank