Viessmann Vitodens 200-W B2HA 88 Technical Data Manual page 9

Vitodens 200-W B2HA 88-150, 311- 530 Technical Data
Waterside Flow
The Vitodens 200-W, B2HA 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 below),
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.
(primary circuit)
Flow rate
Flow rate
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. See pages 32 and 33
for low-loss header information. 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.
Pressure drop (primary circuit) for
Vitodens 200-W, B2HA 88, 100, 311, 352
For sizing an on-site circulation system.
Max. flow rate: 25 USGPM (5700 L/h)
Pressure drop (primary circuit) for
Vitodens 200-W, B2HA 112, 150, 399, 530
For sizing an on-site circulation system.
Max. flow rate: 38 USGPM (8600 L/h)
Waterside Flow
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