6
GENERAL
GENERAL
5
SYSTEM LAYOUT
Mod. 430-550
1
2
5
7
10
6
12
11
9
3
4
8
13
14
7
15
16
18
20
20
21
22
17
19
23
1
Insulation
2
Domestic cold water inlet
3
Buffer tank
4
Bottom coil
5
Probe pit
6
Sleeve for electric heating element (not supplied)
7
Boiler temperature sensor socket
8
Top coil
9
Storage cylinder temperature gauge
10
Domestic hot water outlet
11
DHW coil
12
Vent valve fitting
13
Outlet from boiler
14
Flow from second boiler
15
Heating system inlet
16
Return to second boiler
17
Flow from solar collector
18
Boiler return line (water 50°C)
19
Return to solar collector
20
Condensation boiler inlet / Water return 50° C
21
Solar controller temperature sensor socket
22
Condensing boiler return / Storage tank filling
23
Heating system return line (water 30°C) / Storage tank
draining
