Datasheet

5822 239
30
3.1 Application example 8
Application example 8 - Multi-boiler system with Vitogas 100 boilers and with
shunt pumps for raising the return temperature of each boiler
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 Shunt pumps.
Possible applications:
Heating systems with distributor installed
close to the boiler. The boiler water
volume flow will be reduced via the
motorised butterfly valves.
System-specific coding
For every Vitotronic 100 (type GC1) in the
standard delivery condition:
T1 changes the position of the motorised
butterfly valve:
T1 changes boiler circuit control unit:
change ”0C” to ”3” – butterfly valve
activates acc. to temperature.
change ”0D” to ”1” – T1 controls the
heating circuit control mixer.
Function description:
The temperature sensor T2 or the limit
thermostat T2 activates the shunt pump,
if the ac tual temperature falls below the
required minimum return temperature. If
the minimum return temperature is not
reached, even if a return temperature
raising facility is used, the volume flow
must be reduced by at least 50 % via the
temperature sensor T1, the limit
thermostat T1 or the heating circuit
control units.
Size the shunt pump to approx. 30% of
the total throughput capacity of the boiler.
The distributor pump(s) and the
motorised butterfly valve(s) must be
connected to the external control unit, if
an external c ascade control unit is used.
The boiler receives optimum protection
when using Vitotronic 333 or if the
heating circuits are controlled via a
connected Vitotronic 050. No additional
on-site protective measures are required.
Advantages:
You will not need a boiler circuit pump or
costly mixing valve to raise the return
temperature.
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 1to3 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 T2 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. s ensor well)
or
Temperature sensor T2 (in conjunction with Vitotronic 100, type KC2)
1to3
1to3
1to3
7450 642
7450 641
Z001 886
6 Temperature sensor T1 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. s ensor well)
or
Limit thermostat T1 (in conjunction with Vitotronic 100, type KC2)
1to3
1to3
1to3
7450 642
7450 641
Z001 886
7 Shunt pump 1to3 on site
8 Motorised butterfly valve 1to3 on site