25
5601 189 v1.1
Vitodens 100-W, WB1B Technical Data
Model WB1B 26 35
∆ t
Output Btu/h 83,000 108,000
30° F rise (GPM) 5.5 ---
35° F rise (GPM) 4.7 6.2
40° F rise (GPM) 4.2 5.4
Maximum Flow Rates
Vitodens 100-W, WB1B 10-26, 10-35 with CombiPLUS
and one heating circuit without LLH
Legend
AV
Air vent
PRV Pressure relief valve (boiler)
PRV* Pressure relief valve (DHW 150 psi)
WSE Water softener equipment
A Vitodens 100-W gas-fired condensing boiler
B External system controller (field supplied)
C Heating circuit
D Heating circuit pump (field supplied)
E CombiPLUS
F Closely spaced tees, 4x pipe Ø or 12” (305 mm)*
G Expansion tank
* 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.
See page 18 for details.
Note: The use of a low-loss header is recommended if the
water flow rate is less than 1.7 GPM (400 L/h) or
more than 6.2 GPM (1400 L/h).
The low-loss header is available as an accessory part.
System Layout 6
Installation
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