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17
16
15
14
13
12
11
10
9
20
30° 40° 50° 60° 70° 80°
18
7
8
22
23
24
21
25
27
28
29
26
30° 40° 50° 60° 70° 80°
19
2.0 General Layout
2.1
Layout
1.
Air Pressure Switch
2.
Expansion Vessel
3.
Burner Manifold
4.
Automatic Air Vent
5.
Circulation Pump
6.
Drain Off Point
1
7.
Pressure Relief Valve
8.
DHW Relay PCB
9.
System Pressure Gauge
2
10.
PCB
11.
Control Box
12.
Spark Generator
13.
Flame Sensing Electrode
3
14.
Spark Electrode
15.
Burner
4
16.
Primary Heat Exchanger
17.
Fan Assembly
18.
On/Off/Reset Selector Switch
19.
Central Heating Temperature Control
5
20.
Flame Failure
21.
Safety Thermostat
6
22.
Fault on Fan or Flue
23.
Fault on Pump or Low System Pressure
24.
Temperature Indication Only
25.
Fault on Central Heating Sensor
26.
Power On
27.
Hot Water Mode
28.
Central Heating Mode
29.
Burner On
When neons 20 to 25 are constantly illuminated,
they indicate the temperature of the central heating
water.
2
bar
9
5
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