Datasheet

5822 239
22
3.1 Application example 5
Application example 5 - Single boiler system with Vitogas 100 boiler and one heating circuit
with mixer plus shunt pump for raising the return temperature
System:
Single boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 200 (type KW2)
or
Vitotronic 100 (type GC1) with
Vitocontrol control panel and integrated
weather-compensated Vitotronic 333
(type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H Shunt pump
Possible applications:
Heating systems with distributor installed
close to the boiler. The boiler water
volume flow must be able to be reduced.
Function description:
The limit thermostat T2 activates the shunt
pump, if the actual temperature falls
below the required minimum return
temperature. If the minimum return
temperature is not reached even if the
return temperature is reached, the volume
flow must be reduced by at least 50 % via
the limit thermostat T1.
Size the shunt pump to approx. 30 % of
the total throughput capacity of the boiler.
If it is not possible to reduce the boiler
water volume flow, e.g. in older systems,
we would recommend the example on
pages 28 and 29.
Advantages:
You will not need any boiler circuit pump
or costly mixing valve to raise the return
temperature.
Wiring diagram
Connection of the limit thermostat T1
Connection of the heating circuit and shunt pumps
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 Limit thermostat T2 1 Z001 886
3 Shunt pump 1 on site
4 Limit thermostat T1 1 Z001 886
5 Expansions for heating circuit with mixer in conjunction with Vitotronic 200 (type KW2)
– 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)
1
1
1
1
7450 650
as per price list
7450 642
7450 641
6 Contactor relay 1 7814 681
H in conjunction with Vitotronic 200 (type KW2)
PTC
C
?
4
C Flow temperature sensor ?
H in conjunction with Vitotronic 100 (type KC2)
E
6
L1
N
PE
D
2
1
4
K
D Mains electrical connection,
230V~/50 Hz
E Downstream heating circuit control
unit contact closed: signal for
”Close mixer”
closed closed closed
H For pumps with a power consumption of ≦ 4A
20
L
N
1
2
3
F
3
G
2
F Heating circuit pump
G Connection box (on site)
H For pumps with a power consumption of ≧ 4A
F Heating circuit pump
G Connection box (on site)
6
3
K1
L
N
1
2
3
F
2
20
L
N