21
INSTALLER
INSTALLER
3.8
Schematic diagram
Direct systems
11
CENTRAL HEATING
SUPPLY
CENTRAL HEATING
RETURN
3
4
5
3
3
4
5
3
DHW USER
POINT
14
INLET
3 15 16 3
13
9
6
12
3 10 15 3
3
6
7
2
3
4
5
3
3
2
3
18
19
19
8
17
3
1
20
1
Boiler
R
TAU N
2
Central heating system manifolds
3
Disconnect valves
4
System pumps
5
Non-return valves
6
Automatic vent valve
7
Boiler safety valve
8
Boiler drain cock
9
Storage cylinder safety valve
10
System filling cock
11
CH expansion vessel
12
Remote controlled water tank
R
13
Storage cylinder drain cock
14
DHW expansion vessel
15
Water softener filter
16
Pressure reducer
17
Siphon
18
Condensate outlet
19
Boiler drain
20
Water supply/top-up counter
21
Mixer valve
(*)
AT= High Temperature BT= Low Temperature
9
Domestic hot water and central heating circuits must be completed with expansion vessels of adequate capacity and suitable,
correctly-sized safety valves. The discharge of safety valves and appliances must be connected to a suitable collection and dis-
posal system (see Catalogue for compatible accessories).
9
The choice of system components and the method of their installation are left up to the heating engineer installing the system.
Installers must use their expertise to ensure proper installation and functioning in conformity to all applicable legislation.
9
Special supply/refill water must be conditioned using suitable treatment systems.
0
It is prohibited to operate the thermal module without water.
8
11
CENTRAL HEATING
SUPPLY
LT (*)
CENTRAL
HEATING
RETURN
HT (*)
CENTRAL
HEATING
RETURN
6
7
3
4
5
3
3
4
5
3
DHW USER
POINT
14
INLET
3 15 16 3
13
9
6
12
3 10 15 3
3
2
3
4
5
3
3
2
3
18
19
19
21
3
1
20
3
3
2
17
Direct and mixed systems
