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Vitodens 100-W, B1HA series & B1KA Combi Technical Data
Operation
Heating Circuit Pumps
(continued)
Domestic Hot Water Production via Instantaneous DHW Plate Heat Exchanger (B1KA)
The B1KA is equipped with an electronically controlled instantaneous DHW plate heat exchanger.
The comfort control function (if selected) ensures that the instantaneous DHW plate heat exchanger is kept warm.
This translates into immediate availability of domestic hot water at any required temperature level.
Technical Data DHW Plate Heat Exchanger
See pages 4,5 and 6 in this manual for technical data.
B1KA
heat exchanger performance
DHW supply temperature for B1KA 35, 125 (with mixed water)
This chart illustrates the changes in the outlet temperature,
subject to the flow rate at the tap.
If greater volume (max. flow rate through heat exchanger=
3.7 GPM) of water is required, cold water needs to be
mixed which reduces the outlet temperature.
Curve is only applicable for a DCW inlet temperature of
50ºF and a boiler input of 149,000 MBH (Vitodens 100-W,
B1KA 35, 125).
Max. recovery rate @ DHW temperature of 140ºF = 3.0 GPM
Min. flow through the heat exchanger for boiler start= 0.4 GPM
DHW supply temperature
DHW flow rate
A diaphragm expansion tank is integrated into the
Vitodens 100 B1KA, with a capacity of 2.1 USG (8 L)
and a pre-charge pressure of 12 psig.
Determine the required size of the expansion tank to be
installed in the heating system. If the integral expansion
tank is insufficient, install a suitably sized expansion tank
on site.
IMPORTANT
B1KA - 35 DHW Pressure Drop
Pressure Drop
DHW Flow
