Neutralization Unit - Viessmann B1KA Installation And Service Instructions Manual

Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Installation/Service

Neutralization Unit

Accessories for the Vitodens 100-W
Neutralization Unit for Single-Boiler Applications
with neutralizing granulate for Vitodens 100-W, B1HA 26,
35, 94, 125 and B1KA 35, 125
Part No. 7134 231
Low-Loss Header
- Type 80/60
[max. flow rate 19.5 GPM (4.4 m
- Type 120/80
[max. flow rate 35.2 GPM (8 m
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.
For maximum boiler flow rates, see the table on page 25
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.
T1
T2
Low-loss header design
Product may not look exactly as illustrated.
3 /h)]
3 /h)]
T3
T4
V
primary
Principal of operation
The low-loss header is available in the following sizes.
Select the size based on the maximum system flow rate
of your application.
Model No.
Type 80/60
Type 120/80
Legend
AB Air Bleed
BR Boiler Return
BS Boiler Supply
BY Bypass
(with laminar flow)
D Debris and/or air
T1 Boiler supply temp.
T2 Boiler return temp.
V Boiler circuit flow rate
primary
V Heating circuit flow rate
secondary
V
Bypass flow rate
bypass
Q
Heat supplied by boiler
primary
Q
Heat consumed by system
secondary
V < V
primary secondary
T1 > T3
T2 = T4
Q = Q
primary secondary
T1 176°F (80°C)
V secondary= V primary+ V bypass
IMPORTANT
When installing a low-loss header, system mixed supply
temperature (T3) must be calculated as follows
Connections
V V
bypass secondary
Max. system flow rate
19.5 GPM (4.4 m 3 /h)
35.2 GPM (8 m 3 /h)
DV Drain Valve
SR System Return
SS System Supply
TS Viessmann Temp.
Sensor (not used)
SW Sensor Well
T3 System supply temp.
T4 System return temp.
35