Viessmann VITODENS 100-W WB1B Series Installation And Service Instructions Manual page 28

Boiler Connections
Installation Examples
System Layout 1
Vitodens 100-W, WB1B 26, 35
with...
- one heating circuit
AV
PVR
Fig. 24 Fi 24
System Layout 1 - Alternate Option
AV
PVR
Fig. 25
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 L/h.
The low-loss header is available as an
accessory part.
28
(continued)
Maximum Flow Rates
Model WB1B 26
∆ t
Output Btu/h
30º F rise (GPM) 5.5
35º F rise (GPM) 4.7
40º F rise (GPM) 4.2
Legend
AV
PRV
A
B
C
D
E
F
Note:
Heating circuit C in the examples
should be designed to 30º F to 40º F /
16.7º C to 22.2º C. For a lesser delta T
design, the system layout designer
must use one of the examples (3 or 4)
on the following pages.
IMPORTANT
Ensure that a pressure activated by-
pass is installed if there are system
component(s) in C that may isolate
the flow to the pump D.
35
83,000 108,000
----
6.2
5.4
Air vent
Pressure relief valve
Vitodens 100-W
Room thermostat
Heating circuit
Heating circuit pump
(field supplied)
Expansion tank
Pressure Activated By-Pass