Viessmann WB1A007 Technical Data Manual

18
5601 189 v1.1
Vitodens 100-W, WB1B Technical Data
IMPORTANT
Accessories for the Vitodens 100-W
Neutralization Unit for Single-Boiler Applications
with neutralizing granulate for Vitodens 100-W, WB1B 26, 35
Part No. 7134 231
Low-Loss Header
- Type 80/50, Part No. 7134 791
[max. flow rate 17.6 GPM (4 m3/h)]
- Type 120/80, Part No. 7134 792
[max. flow rate 35.2 GPM (8 m3/h)]
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. When used in
conjunction with the Vitodens 100-W
boiler, the low-loss header acts as
hydraulic break, decoupling boiler and
system circuits from each other (no
sensor required). It is recommended to
use the low-loss header in applications in
which the total system flow rate exceeds
the maximum or falls below the minimum
flow rate of the Vitodens 100-W boiler.
Product may not look exactly as illustrated.
The low-loss header is available in the following sizes.
Select the size based on the maximum system flow rate
of your application.
Legend
V
primary
Boiler circuit flow rate
V
secondary
Heating circuit flow rate
V
bypass Bypass flow rate
Q
primary Heat supplied by boiler
Q
secondary Heat consumed by system
V
primary <
V
secondary
T1 > T3
T2 = T4
Q
primary =
Q
secondary
T1 176° F (80° C)
V
secondary=
V
primary+
V
bypass
When installing a low-loss header, system mixed supply
temperature (T3) must be calculated as follows
For maximum boiler flow rates, see the table on page 11
in this manual.
Viessmann strongly recommends the use of a low-loss
header in cases where the system head and flow rates
are unknown.
In addition, the low-loss header helps eliminate air and
debris [D] from the heating system. See illustrations for
Low-loss header design and the principle of operation.
Product may not look exactly as illustrated.
Low-loss header design
Prinicpal of operation
V
prim
ary
V
bypass
V
secondary
AB Air Bleed DV Drain Valve
BR Boiler Return SR System Return
BS
Boiler Supply SS System Supply
BY Bypass
(with laminar flow)
TS Viessmann Temp.
Sensor (not used)
D Debris and/or air SW Sensor Well
T1 Boiler supply temp. T3 System supply temp.
T2 Boiler return temp. T4 System return temp.
Model No. Max. system flow rate
Type 80/50 17.6 GPM (4 m3/h)
Type 120/80 35.2 GPM (8 m3/h)
Installation
Accessories

Viessmann WB1A007 Specifications

General

Brand	Viessmann
Model	WB1A007
Category	Boiler
Language	English