Viessmann VITODENSd 100-W Technical Data Manual page 14

Operation
Heating circuit pumps
Domestic Hot Water Production via Instantaneous DHW Plate Heat Exchanger (CombiPLUS)
The CombiPLUS 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 page 5 in this manual for technical data.
CombiPLUS heat exchanger performance
DHW supply temperature for WB1B 26 (with mixed water)
DHW flow rate (GPM)
DHW supply temperature for WB1B 35 (with mixed water)
DHW flow rate (GPM)
DHW supply temperature for WB1B 35 (with mixed water)
DHW flow rate (GPM)
14
(continued)
Vitodens 100-W, WB1B Technical Data
Legend
A DHW output temperature
B DHW/DCW mixing zone
C DHW output temperature at the tap
D Max. flow (restriction by flow limiter)
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=
2.6 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
56º F and a boiler input of 91,000 MBH (Vitodens 100-W,
WB1B 26).
Max. recovery rate @ DHW temperature of 140º F = 1.7 GPM
Min. flow through the heat exchanger for boiler start= 0.4 GPM
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=
3.6 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
56º F and a boiler input of 118,000 MBH (Vitodens 100-W,
WB1B 35).
Max. recovery rate @ DHW temperature of 140º F = 2.4 GPM
Min. flow through the heat exchanger for boiler start= 0.4 GPM
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=
3.4 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
40º F and a boiler input of 118,000 MBH (Vitodens 100-W,
WB1B 35).
Max. recovery rate @ DHW temperature of 140º F = 2.14 GPM
Min. flow through the heat exchanger for boiler start= 0.4 GPM