Viessmann VITOTRONIC 100 Installation And Service Instructions Manual page 56

System extension
System with flue gas/water heat exchanger
A
Boiler with Vitotronic 100
B
Vitotrans 333 (flue gas/water
heat exchanger)
C
Circulation pump
Vitotrans 333
D
Motorised butterfly valve
Vitotrans 333
E
Motorised boiler butterfly
valve
F
Shunt pump
G
Low temperature heating
circuit
H
DHW cylinder
K
Boiler circuit pump
L
Three−way mixing valve
M
Contactor relay,
part no. 7814 681
sÖA1 for circulation pump
gas/water heat exchanger
(Vitotronic 100)
56
Required coding:
Adjust on every Vitotronic 100 with
Vitotrans 333 "4C : 3".
Circulation pump and motorised
butterfly valve
The circulation pump is started in
parallel to the burner.
sÖ A1
N
M
flue
Note
Arrange the system designs on site
so that output sÖ A1 must be used
as switching contact or heating
circuit pump connection.
(cont.)
Vitotrans 333
L1 L1 N
K6
M
C D
1~
M
1~