Datasheet

5822 239
36
3.1 Application example 11
Application example 11 - Multi-boiler system with Vitogas 100 boilers
and 3-way mixing valve for raising the return temperature
System:
Multi-boiler systems with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
and
Vitotronic 333 (type MW1) one for the
whole multi-boiler system
or
Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated cascade control
unit with DHW cylinder temperature
control (for connections, see page 43)
H Vitotronic 050
H and 3-way mixing valve for raising the
return temperature.
Possible applications:
For example, older heating systems
and/or systems, where downstream
heating circuits cannot be controlled.
System-specific coding
at every Vitotronic 100 (type GC1)
change ”0C” to ”1” – system w ith
constant return temperature control for
every boiler.
change ”4D” to ”2” – use the plug-in
connector sL for the boiler circuit pump.
Function description:
If this does not achieve the required
minimum return temperature, the
temperature sensor T1 closes the 3-way
mixing valve in proportion and therefore
ensures the boiler protection.
Boiler and downstream heating circuits
are hydraulically coupled together.
The flow temperature is controlled by the
common temperature sensor.
Advantages:
Proportional return temperature raising
to protect the boiler.
Boilers are protected against return
temperatures which are too low,
independent of the downstream heating
circuits.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Item
Description Number Part no.
1 Boiler with Vitotronic 100 and Vitotronic 333 1 as per price list
2 Boiler with Vitotronic 100 1to2 as per price list
3 Expansions for heating circuits with mixer with Vitotronic 333 and Vitotronic 050
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. s ensor well)
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
7450 650
as per price list
7450 642
7450 641
4 Vitotronic 050 (communication module LON required) corresp. to
heating circuits
as per price list
5 Temperature sensor T1 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. s ensor well)
1to3
1to3
7450 642
7450 641
6 3-way mixing valve 1to3 on site
7 Boiler circuit pump 1to3 on site