Vitodens 200-W B2HB 19 to 35, 68 to 125 Installation
5461 884 - 14
30
Boiler Connections
Waterside Flow
Waterside flow (primary circuit)
The Vitodens 200-W, B2HB is designed for closed loop,
forced circulation hot water heating systems only.
Use standard friction loss method for pipe sizing. Observe
boiler maximum and minimum flow rate limitations.
If system flow rate exceeds boiler maximum flow rate
(as stated above), falls below the minimum flow rate
or if system flow rate is unknown, Viessmann strongly
recommends the installation of a low-loss header.
Once the low-loss header is connected, the built-in low-
loss header logic of the Vitodens 200-W boiler ensures
the required
t across the system through the sensory
communication between the low-loss header and the
boiler.
An alternative method may be used, such as primary
secondary piping using closely spaced tees. A low-loss
header offers additional benefits not provided by a pair
of closely spaced tees. Viessmann therefore strongly
recommends and prefers the use of a low-loss header
over closely spaced tees. Refer to the Technical Data
manual for low-loss header information.
Model B2HB 26, 94
1 boiler
Output (NG/LPG)
MBH
88
t for NG/LPG
20ºF (11ºC) rise GPM (L/h)
8.8 (1999)
25ºF (14ºC) rise GPM (L/h)
7.0 (1599)
30ºF (17ºC) rise GPM (L/h)
5.9 (1332)
35ºF (19.5ºC) rise GPM (L/h)
5.0 (1142)
40ºF (22ºC) rise GPM (L/h)
4.4 (999)
Boiler maximum flow rate 6.2 GPM (1400 L/h)
Boiler maximum flow rate 6.2 GPM (1400 L/h)
Boiler maximum flow rate 6.2 GPM (1400 L/h)
Pressure drop (primary circuit) for
Vitodens 200-W, B2HB 19, 26, 35, 68, 94, 125
For sizing an on-site circulation system.
Max. flow rate: 6.2 GPM (1400 L/h)
Model B2HB 19, 68
1 boiler
Output (NG/LPG)
MBH
64
t for NG/LPG
20ºF (11ºC) rise GPM (L/h)
6.4 (1453)
25ºF (14ºC) rise GPM (L/h)
5.1 (1163)
30ºF (17ºC) rise GPM (L/h)
4.3 (969)
35ºF (19.5ºC) rise GPM (L/h)
3.7 (830)
40ºF (22ºC) rise GPM (L/h)
3.2 (727)
Model B2HB 35, 125
1 boiler
Output (NG/LPG)
MBH
117
t for NG/LPG
20ºF (11ºC) rise GPM (L/h)
11.7 (2657)
25ºF (14ºC) rise GPM (L/h)
9.4 (2126)
30ºF (17ºC) rise GPM (L/h)
7.8 (1771)
35ºF (19.5ºC) rise GPM (L/h)
6.7 (1518)
40ºF (22ºC) rise GPM (L/h)
5.9 (1328)
Flow rate
Supply head pressure (water)