Viessmann Vitodens 200-W B2HA series, Application Manual

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Application 3 - Operational Setup ... continued
Notes/Comments
Further Considerations
DHW Production
Set timer schedule as desired. If DHW production possible at any time, program timer settings to
0:00 to 24:00
DHW Recirculation Pump
Set recirculation pump timer as desired for pump connected to 28/20 output
DHW production from system side of low loss header, address 5B will need to be changed from a value
of 0 to 1.
DHW priority can be removed by changing address A2 to a value of 0.
Boiler pump operation can be modified with address 51 by setting to a value of 1. When there is a demand for
heat, the boiler pump will turn on and then turn off after the demand has been removed and post purge time.
This is based on having a low loss header temperature sensor installed.
The HC1 settings are still available should an outdoor reset based zone be connected. Should mixing valve
extension kits be used, adjust the outdoor reset settings as required.