2. Devices and functional description
Legend
Item
Name
1
Heating circuit 1 return line
2
Heating circuit 1 supply line
3
Heating circuit 2 return line
4
Heating circuit 2 supply line
5
Boiler return line
6
Boiler supply line
Optional pump group for third heating
7
circuit
A
Insulation - rear
B
Insulation - front
C
Ball valve with thermometer
D
HE pump
E
Distribution bar diverter valve
Thermowell for distribution bar supply
F
line sensor
G
Distribution bar
H
Servomotor
Thermowell for heating circuit supply line
J
sensor
RV
Backflow preventer in supply line
#1) For heat generators with internal pump only
#2) See chapter 4.4
24
Reference
Unmixed circuit, e.g. for domestic water
heater
#1
if included
Standard / differential pressure arm
#2
For 6-mm temperature sensor
Mixed circuit only