Operational Details - Viessmann VITOROND 200 Technical Data Manual

Operational Details

Heating water volume flow
Boiler return water temperature
(minimum)
Minimum boiler water
temperature
2-Stage burner operation
Modulating burner operation
Setback operation
Weekend setback
VITOROND 200, VD2
Requirements
30% at heating output
For operation with modulating boiler water temperatures:
- Oil-fired 104°F / 40°C
- Gas-fired 127°F / 53°C
For operation with elevated boiler water temperatures:
- Oil-fired 127°F / 53°C
- Gas-fired 127°F / 53°C
For operation with modulating boiler water temperatures:
- Oil-fired 122°F / 50°C
- Gas-fired 140°F / 60°C
For operation with elevated boiler water temperatures:
- Oil-fired 140°F / 60°C
- Gas-fired 149°F / 65°C
For operation with modulating boiler water temperatures:
first stage 60% of heating output
For operation with elevated boiler water temperatures:
No minimum heating input applies
For elevated boiler water temperatures only:
- Oil-fired 140°F / 60°C
- Gas-fired 149°F / 65°C
- min. return water temperature 127°F / 53°C
Minimum boiler water temperature:
- Oil-fired 122°F / 50°C
- Gas-fired 140°F / 60°C
For multiple-boiler installations:
- Lead boiler as above
- Lag boiler(s) is/are deactivated
See Setback operation
Operational Details
are fulfilled via...
a bypass pump / shunt pump or
boiler circulation pump
an effective system of return tempera-
ture elevation
The Viessmann Dekamatik or Vitotronic
control system
Burner calibration (site)
The Viessmann Dekamatik or Vitotronic
control system
The Viessmann control included in the
standard equipment
See Setback operation
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