23
INSTALLER
INSTALLER
Two heating boilers and domestic hot water production
15
10
12
3
3
3
4
5
3
19
3 12 10 3
18
20
6
15
6
3
3
3
11
3
3
3
3
10
17
9
5
7
7
SP
17
M
18
TC
3
3
3
3 4 5 3
5
3
3
3 5
3 5 3
3
8
13
3
13
14
8
FLOW
FLOW
LOADING
THE
STORAGE
TANK
DHW
USER
POINT
MAKE-UP
WATER
COLD
WATER
INLET
LT (*)
CENTRAL
HEATING
RETURN
HT (*)
CENTRAL
HEATING
RETURN
LT (*)
RETURN
LT (*)
RETURN
HT (*)
RETURN
HT (*)
RETURN
CENTRAL
HEATING
SUPPLY
1
2
1
2
1
Boiler
2
Burner
3
Disconnect valves
4
Central heating system pump
5
Non-return valves
6
Automatic vent valve
7
Boiler safety valve
8
Boiler drain cock
9
Y filter
10
Pressure reducer
11
CH expansion vessel
12
Water softener filter
13
Siphon
14
Condensate outlet
15
Boiler drain
16
Air separator
17
Storage cylinder
18
Storage cylinder drain cock
19
DHW expansion vessel
20
Storage cylinder safety valve
M
Pressure gauge
SP
Cascade control panel
TC
Temperature control
EAF
Domestic cold water inlet
UACS
Domestic hot water outlet
(*)
HT = High temperature / LT = Low temperature