Unical DUA plus BTN 28 - Hydraulic Circuits

Technical features and dimensions
6
fig. 2
fig. 3
DUA plus BTN 28
DUA plus BTFS 28
MRGCF
13
12
9
8
7
6
5
4
3
2
1
10
11
14
20
26
19
18
17
16
21
22
23
24
25
27
28
29
RGMCF
5
4
3
2
1
6
7
9
10
16
15
14
13
12
11
19
18
17
20
21
23
22
24
29
25
26
27
28
30
31
32
33
34
8
15
30
1.3 - HYDRAULIC CIRCUITS
1 Filling system cock
2 Boiler draining valve
3 By-pass
4 No-return valve
5 Pump
6 Air vent
7 Modulating gas valve
8 Low water pressure switch
9 Ignition electrode
10 Burner injectors
11 Ignition electrode
12 Ionisation electrode
13 Main heat exchanger
14 Smoke safety thermostat
15 Draught diverter
16 Safety thermostat
17 Manual air vent
18 Boiler expansion tank valve inflation
19 Expansion vessel
20 Flow temperature sensor
21 Expansion vessel l. 4 (optional)
22 Heat exchanger draining valve
23 Tank
24 Tank draining valve
25 Magnesium anode
26 Tank temperature sensor
27 Domestic Hot Water flow restrictor
28 Filter
29 C.H. safety valve
30 Boiler safety valve
M C.H. flow 3/4"
C D.H.W. outlet 1/2"
G Gas inlet 3/4"
F D.C.W. inlet 1/2"
R C.H. return 3/4"
1 Filling system cock
2 Boiler draining valve
3 By-pass
4 No-return valve
5 Pump
6 Air vent
7 Modulating gas valve
8 Low water pressure switch
9 Ignition electrode
10 Burner injectors
11 Ignition electrode
12 Ionisation electrode
13 Main heat exchanger
14 Smoke pressure nipple
15 Extraction fan
16 Air intake and smoke evacuation duct
17 Microswitch of the smoke pressure
18 Safety pressureswitch of smoke circuit
19 Smoke pressure nipple
20 Safety thermostat
21 Manual air vent
22 Boiler expansion tank valve inflation
23 Expansion vessel
24 Flow temperature sensor
25 Heat exchanger draining valve
26 Expansion vessel l. 4 (optional)
27 Tank
28 Tank draining valve
29 Magnesium anode
30 Tank temperature sensor
31 Domestic Hot Water flow restrictor
32 Filter
33 C.H. safety valve
34 Boiler safety valve
M C.H. flow 3/4"
C D.H.W. outlet 1/2"
G Gas inlet 3/4"
F D.C.W. inlet 1/2"
R C.H. return 3/4"