Datasheet
5822 239
28
3.1 Application example 7
Application example 7 - Single boiler system with Vitogas 100 boiler and two heating
circuits with mixer, shunt pump and 3-way mixer for raising the return temperature
System:
Multi-boiler systems with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 300 (type GW2)
or
Vitotronic 100 (type GC1)
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H Shunt pump
H 3-way mixer
Possible applications:
Heating systems, where downstream
heating circuits cannot be controlled, e.g.
older systems or nurseries.
System-specific coding
change ”0C” to ”1” – system w ith
constant return temperature control.
Function description:
The limit thermostat T2 activates the shunt
pump, if the actual temperature falls
below the required minimum return
temperature. If this does not achieve the
required minimum return temperature, the
temperature sensor T1 closes the 3-way
mixer in proportion and therefore
safeguards the minimum return
temperature.
Advantages:
Proportional return temperature raising
to protect the boiler. A boiler circuit pump
is not required.
Boilers are protected against return
temperature, 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 1 as per price list
2 Shunt pump 1 on site
3 3-way mixer 1 as per price list
4 Temperature sensor T2 (in conjunction with Vitotronic 300, type GW2)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. s ensor well)
1
1
7450 642
7450 641
5 Temperature sensor T1 (in conjunction with Vitotronic 300, type GW2)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. s ensor well)
1
1
7450 642
7450 641
6 Expansions for heating circuits with mixer in conjunction with Vitotronic 300 (type GW2)
– 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)
(see price list for further heating circuit control units)
1or2
1or2
1or2
1or2
7450 650
as per price list
7450 642
7450 641