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Vitodens 100-W, B1HA series & B1KA Combi Installation/Service
Waterside flow (primary circuit)
The Vitodens 100-W, B1HA/B1KA 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.
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 B1HA 26
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)
Pressure drop (primary circuit) for
Vitodens 100-W, B1HA 26, 35 and B1KA 35
For sizing an on-site circulation system.
Max. flow rate: 6.2 GPM (1400 L/h)
Model B1HA 35/B1KA 35
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)
Installation Examples
Connections
