Technical data

5600 332 -06

Vitodens 100-W, WB1B Installation & Service

Installation Examples (continued)

Connections

System Layout 3

Vitodens 100-W, WB1B 26, 35 with...

- DHW storage tank

- one heating circuit

Primary pump L must pump into the boiler (as illustrated)

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 accessory part.

See page 49 in this manual for details on the low-

loss header.

Legend

AV Air vent

PRV Pressure relief valve

TPV Temperature and pressure relief valve

A Vitodens 100-W gas-fired condensing boiler

B External boiler/DHW controller (field supplied)

C Heating circuit

D Heating circuit pump (field supplied)

E DHW storage tank

F DHW tank temperature aquastat or sensor

G DHW circulating pump (field supplied)

H Closely spaced tees, 4x pipe Ø or 12” (305 mm)*

K Expansion tank

L Primary pump (boiler circuit, (field supplied)

*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.

Maximum Flow Rates

4xpipe Ø

or 12” / 305 mm

PRV

TPV

IMPORTANT

Model WB1B 26 35

 t

Output Btu/h 83,000 108,000

30ºF (17ºC) rise (GPM) 5.5 ----

35ºF (19.5ºC) rise (GPM) 4.7 6.2

40ºF (22ºC) rise (GPM) 4.2 5.4