Datasheet

5822 239
34
3.1 Application example 10
Application example 10 - Multi-boiler system with Vitogas 100 boilers
with distributor pump and injection circuit
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 Distributor pump
H Injection circuit.
Possible applications:
If the distributor is located in remote
sub-stations (> 20 m), and the heating
circuits require heat immediately after a
demand is created, e.g. blown air-heaters.
The heat transfer to the heating circuits
must be able to be reduced.
System-specific coding
On Vitotronic 333
change ”4D”to”0” – use the plug-in
connector sL for the distributor pump.
For every Vitotronic 100 (type GC1)
change ”0D” to ”1” – T1 affects the
heating circuit control unit.
Function description:
If the ac tual temperature falls below the
required minimum return temperature,
the temperature sensor T1 or the limit
thermostat T1 reduces or closes the
mixer.
Size the distributor pump to 110% of the
total throughput capacity of the heating
system.
The injection circuit provides heat at the
consumers immediately upon demand.
For this purpose, the 3-way mixer will be
controlled.
If there is no possibility of reducing the
heat transfer to the heating circuits, e.g.
in older systems, we would recommend
that the boiler is connected in accordance
with the examples on pages 34 to 39.
Advantages:
You will not need any shunt pumps or
costly mixing valve to raise the return
temperature.
The boiler receives optimum protection
when using Vitotronic 333 (type MW1) or
if the heating circuits are controlled via a
connected Vitotronic 050. No additional
on-site protective measures are required.
Wiring diagram
Wiring for reducing the volume flow via
the limit thermostat T1 in heating
systems with heating circuit control units,
which are not connected to the boiler
control unit via the LON BUS.
Coding required at every Vitotronic 100
(type GC1):
change ”4C” to ”2” – use the plug-in
connector sÖ A1 to close the downstream
mixer.
sÖ A1 Closing the mixer
D Downstream heating c ircuit
contact closed: signal for ”Close
mixer”
E Mains electrical connection,
230V~/50 Hz
F Connection box, on site
The distributor pump and the motorised
butterfly valve(s) must be connected to
the external control unit, if an external
cascade control unit is used.
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 conjunc tion 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
1
*1
7450 642
7450 641
Z001 886
6 Distributor pump 1 on site
7 Motorised butterfly valve 1to3 on site
8 Contactor relay 1to2 7814 681
*1
Connect once to the main return line.
20 A1 20 A1
8
8
F
F
E
L1
N
PE
closed closed closed
12n...
K1 K2
D