8
DIMENSIONS AND CONNECTIONS DETAILS
ELECTRICAL CIRCUIT DIAGRAM
1.- Surge arrestor
2.- Mains connection
3.- Earth
4.- Fan
5.- Pump
6.- Ignition
7.- Burner solenoid valve 1
8.- Burner solenoid valve 2
9.- Front panel control
10.- 3 way valve
11.- Air pressure switch
12.- Room stat (optional)
13.-Room stat connector block
14.- Clock connection
15.- Modulating solenoid valve
16.- Flame sensor
17.- High limit stat
21.- Hot water thermistor
22.- Central heating thermistor
23.- Pressure switch
25.- Burner functioning indicator
26.- Lock out indicator light
30.- Clock
S4 Gas change bridge. Made-
Propane. Break- Nat. Gas
P1 Maximum power adjustment
P2 Minimum Lighting pressure
P3 Output for central heating
adjustment
1.- 3/4” BSP Central heating return
2.- Mains cable
3.-1/2” BSP Domestic cold water inlet
4.- 3/4” BSP Gas inlet
5.- 1/2” BSP D.H.W. outlet
6.- 3/4” BSP Central heating flow
8.- Pressure Relief Valve
9.- Draining valve for central heating
T.A.:Room thermostat connection
T.A.