Technical data

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Vitorond 200, VD2A Technical Data
Boiler Control
Boiler Control Alternatives
For multiple-boiler installations:
Vitotronic 100, GC1/GC1B
*1
Digital boiler control systems for modulating boiler and
common supply temperature control.
- Electronic boiler control unit
- For two-stage or modulating burners
- Optional communication via LON
Vitocontrol-S MW1/Vitotronic 300-K, MW1B
*1
- Weather-compensated cascade control unit for multi-
boiler systems with up to 4 boilers with the Vitotronic
100 (GC1/GC1B)
- For up to 2 heating circuits with mixing valve with time
switch offering individual and 7-day programs
- Programming unit with plain text prompts
- With control unit for DHW primary systems with mixing
valve assembly
- With lead boiler selection
- Optional communication via LON
- With integral diagnostic system and additional functions
- A function extension to default a set system flow
temperature via a 0 - 10 V input can be connected
(optional)
An extension kit is required for each heating circuit with
mixing valve
*1
See respective product manuals for details. Please
inquire with your Viessmann Representative for further
assistance.
For single-boiler installations:
Vitotronic 100, GC1/GC1B
*1
- Electronic boiler control unit for a constant boiler water
temperature or weather-compensated operation in
conjunction with a Vitocontrol panel with Vitotronic
300-K (type MW1S) or an external control unit
- For two-stage or modulating burners
- With control unit for DHW primary system with mixing
valve assembly or as an alternative to the control of a
constant return temperature with a regulated three-way
valve
- With internal diagnostic system
- A function extension to default the set boiler water
temperature via 0 - 10 V input can be connected
(optional)
External demand:
- Enable boiler/open butterfly valve
- Burner stage 1 ON
- Burner stage 1 and 2 ON
- Isolation valve “close”
Provide a potential free contact for each demand.
Connect the potential free contacts to plug-in connectors
aVD and/or aVH
.
Vitotronic 300, GW2/GW2B
*1
- Weather-compensated, digital boiler and heating circuit
control unit
- For single-boiler systems
- For up to 2 heating circuits with mixing valve
- For two-stage or modulating burners
- With time switch offering individual and 7-day programs
- Programming unit with plain text prompts
- With separately adjustable periods and heating curves
- With control for DHW primary systems with mixing
valve assembly or alternatively, for the control of a
constant return temperature with a regulated three-way
valve
- With internal diagnostic system
- A function extension to default the set boiler water
temperature via 0 - 10 V input can be connected
(optional)
An extension kit is required for each heating circuit with
mixing valve. The LON communication module is required
to enable communication.