Table of Contents
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1. Spark Generator
2. 6 Way In-Line Connector
3. 2 Way In-Line Connector
4. Gas Valve
5. Flow Switch
6. DHW Sensor
7. Spark Electrode
8. Sense Electrode
9. System Pressure Switch
10. CH Pump
11. DHW Pump
12. Pump Relay PCB
13. CH Sensor
14. Fan
15. Overheat Cut-Off Thermostat
16. Air Pressure Switch
Fig 15 - Replacement Fuses
5
1. Control Panel Pivot
Point
2. Fuses-F1,F2
3. Pressure Gauge
13
4
Violet
Grey
Yellow
Brown
1
6 Grouped
3
Wires
to Top of
Boiler
From
2
ST23
Connection
ST12
ST8
LINK
MAINS
IN
1
2
3
4
4. Facia Panel
5. Control Board
Assembly
10
Fig 13 - Pictorial Wiring Diagram
2 Red
Black
Red
White
6 Wires
from
14
Bottom
of
Boiler
7
Blue
6
9
5
2 Pink
2 Orange
2 Green
2 Red
ST15
ST1
Pink
White
Gray
Green/Yellow
Blue
Brown
Fig 16 - Programmer Connection
1
1. Programmer
2. Programmer
Fixing Clip
3. Pressure
Gauge
2 Orange
15
Brown
16
Green
8
10
11
White
12
Brown
Blue
Gr/Yellow
6
2
4. Programmer
Connector
5. Facia
6. Control
Board
5
4
3
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