Table of Contents
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Boiler flow diagram
Boiler flow diagram
Boiler flow diagram
Boiler flow diagram
Boiler flow diagram
Main parts
Main parts
Main parts
Main parts
Main parts
1 1 1 1 1
Fixing point
5 5 5 5 5
Room sealed compartment
6 6 6 6 6
Instrument panel
7 7 7 7 7
Gas inlet
8 8 8 8 8
Domestic hot water outlet
9 9 9 9 9
Domestic hot water inlet
10
10
10
10
10
Central heating flow
11
11
11
Central heating return
11
11
12
12
12
12
12
D.H.W. drain point
14
14
14
14
14
Safety valve
16
16
16
16
16
Fan
19
19
19
Combustion chamber
19
19
20
20
20
20
20
Burner unit
21
21
21
21
21
Injector manifold
22
22
22
Burner
22
22
26
26
26
26
26
Combustion chamber insulation
27
27
27
27
27
Copper exchanger for C.H. or D.H.W.
29
29
29
29
29
Flue outlet manifold
30
30
30
Excess air chamber
30
30
31
31
31
31
31
Air pressure control damper
32
32
32
32
32
C.H. pump
33
33
33
33
33
Heating water circuit
34
34
34
34
34
Heating temp. sensor
35
35
35
35
35
Air separator
36
36
36
36
36
Automatic air vent
37
37
37
Cold water inlet filter
37
37
41
41
41
41
41
Domestic hot water circuit
42
42
42
42
42
D.H.W. temperature sensor
43
43
43
Air pressure switch
43
43
44
44
44
44
44
Gas valve
47
47
47
47
47
Gas valve modulator
48
48
48
Burner pressure test point
48
48
49
49
49
49
49
Overheat thermostat
53
53
53
53
53
Heat exchanger venting point
54
54
54
Temperature sensing phial
54
54
56
56
56
Expansion tank
56
56
57
57
57
57
57
Fan air inlet pressure test point
58
58
58
58
58
Fan air outlet pressure test point
59
59
59
59
59
Flue outlet pressure test point
65
65
65
65
65
230V line terminal strip and probe connections
68
68
68
68
68
Control box with P.C.B.
71
71
71
Balance tube
71
71
81
81
81
Ignition electrode
81
81
82
82
82
82
82
Flame sensing electrode
83
83
83
83
83
Automatic ignition control panel
84
84
84
84
84
1. gas valve operator 230V
85
85
85
85
85
2. gas valve operator 230V
87
87
87
87
87
Venturi test point
96
96
96
Control heating limit sensor
96
96
98
98
98
Main switch
98
98
101
101
101
101
101 P.C.B.
136
136
136
136
136 Flowmeter
137
137
137
137
137 Pressure sensor
140
140
140 Touch keyboard
140
140
141
141
141 Loudspeaker
141
141
142
142 Display P.C.B.
142
142
142
158
158 Gas inlet pressure test point
158
158
158
9
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