Boiler Control Alternatives
14
VITOROND 200, VD2A
Boiler Control Alternatives
For single-boiler installations:
Vitotronic 100, GC1
– 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 assembley 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
*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.
For multiple-boiler installations:
Vitotronic 100, GC1
*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
*1
– Weather-compensated cascade control unit
for multi-boiler systems with up to 4 boilers
with the Vitotronic 100 (type GC1)
– 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.
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