Supplied By www.heating spares.co Tel. 0161 620 6677
11
DOMINA PLUS F 24 - 30 E
FERELLA EXTRA F 24 - 30 MEL
Version - 09.2002
2. PRODUCT FRAMEWORK AND INTERNAL
COMPONENTS
2.1 Hydraulic circuit - heating
Hydraulic diagram for heating
When there is a call for heat, the room thermostat or control system make the burners ignite and the circulation
pump come into operation. The heat contained in the products of combustion is transferred to the water by the
system via the exchanger. For more details on the operating logic, refer to chap.3.
11
10
-
+
7
8
9
49
5
34
73
43
56
81
44
32
20
82
27
29-187
16
74
14
114
136
42
R1
R2
R3
R4
Key
5
Airtight chamber
7
Gas inlet
8
Tap water outlet
9
Tap water inlet
10
System delivery
11
System return
14
Safety valve
16
Fan
20
Burner assembly
27
Heat exchanger
29
Fume outlet collar
32
Heating circulator
34
Heating temperature sensor
42
Tap water temperature sensor
43
Air pressure switch
44
Gas valve
49
Safety thermostat
56
Expansion tank
73
Antifreeze thermostat
74
System filler cock
81
Ignition electrode
82
Detection electrode
114
Water pressure switch
136
Flow meter
187
Fume diaphragm
R1-R2-R3-R4
Antifreeze heating elements