16
3.
Fit the new fan over the bosses on the back plate; fit the spacing collar and replace the screws and
washers. Make sure that the air guide on the fan fits behind the front division sheet.
4
Remake the electrical connections.
5.
To clean the fan, brush the blades with a soft brush until all the dust is removed. The fan does not
need lubricating.
Combustion Fan
1.
Remove the front division sheet by removing four screws.
2.
Disconnect the fan wires from the main terminal block and the earth connection from the fan.
3.
Remove the two screws and washers holding the fan to the heat exchanger and pull off the fan and its
rubber connecting duct.
4.
Fit the rubber duct to the new fan. Always fit a new gasket when the fan has been removed. For ease
of assembly, the new gasket may be secured to the flange of the fan with a few spots of contact
adhesive.
5.
Fit the fan to the heat exchanger, making sure that the rubber duct fits securely round the plunged
hole in the backplate and that the sealing gasket is not damaged. Re-fit the screws and washers.
6.
Remake the electrical connections
7.
To clean the fan, brush the rotor blades with a soft brush until all the dust is removed. The fan does
not need lubricating.
Solenoid Valves
1.
Pull off tag connector from the spark electrode. Remove two screws and washers from the air guide
and remove the air guide.
2.
Disconnect the gas inlet connection to the heater.
3.
Remove the six wire connectors to the solenoid valve assembly (Note their positions).
4.
Disconnect the tubing nut connection on the burner supply pipe.
5.
Remove the two screws and washers fixing the burner supply tube to the burner mounting plate.
Remove the valve assembly and burner supply tube out from the valve support bracket and away
from the heater.
6.
Fit the new valve assembly to the heater using the new gasket provided.
7.
Resecure the valve assembly using the existing screws and washers. Tighten the inlet gas connection
and the tubing nut.
8.
Refit the six wire connections, Their positions can be seen on the wiring diagram provided in these
instructions.
9.
Refit the air guide and reconnect the spark lead to its electrode (the one with the round pin).
10.
Reconnect the gas and electrical supplies.
