Unical DUA plus, Installation And User Instruction Manual

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6
Technical features and dimensions
R F
G
M
C
R
F G M C
1.3 - HYDRAULIC CIRCUITS
fig. 3
DUA plus CTN 24 (T)
DUA plus CTFS 24 (T)
fig. 2
1 Thermostatic diverting valve (T)
2 Low water pressure switch
3 C.H. safety valve
4 Modulating gas valve
5 Burner injectors
6 Ignition electrode
7 D.H.W. temperature sensor
8 Main heat exchanger
9 Draught diverter
10 Smoke safety thermostat
11 Boiler expansion tank valve inflation
12 Expansion vessel
13 Safety thermostat
14 Ionisation probe
15 Flow temperature sensor
16 Air vent
17 Pump
18 Filling system cock
19 Boiler draining valve
20 Domestic Hot Water flow restrictor
21 Filter
22 Flow switch
23 By-pass
24 Thermostatic limiter in the D.H.W. flow rate (TES)
M Heating flow
C D.H.W. outlet
G Gas supply
F
D.C.W. inlet
R Heating return
2
1
3
4
5
6
10
12
13
15
14
11
16
17
19
18
20
21
22
24 23
9
11
12
10
7
8
9
2
1
3
4
5
6
7
8
15
16
18
17
14
19
20
22
21
23
24
25
27
26
13
1 Thermostatic diverting valve (T)
2 Low water pressure switch
3 C.H. safety valve
4 Modulating gas valve
5 Burner injectors
6 Ignition electrode
7 D.H.W. temperature sensor
8 Main heat exchanger
9 Room sealed combustion chamber
10 Extraction fan
11 Microswitch of the smoke pressurestat
12 Safety pressureswitch of smoke circuit
13 Air intake and smoke evacuation duct
14 Boiler expansion tank valve inflation
15 Expansion vessel
16 Safety thermostat
17 Ionisation probe
18 Flow temperature sensor
19 Air vent
20 Pump
21 Filling system cock
22 Boiler draining valve
23 Domestic Hot Water flow restrictor
24 Filter
25 Flow switch
26 By-pass
27 Thermostatic limiter in the D.H.W. flow rate (TES)
M Heating flow
C D.H.W. outlet
G Gas supply
F
D.C.W. inlet
R Heating return
6
6