andrews MAXXflo EVO CWH 90/302 Installation And Maintenance Manual page 62

6.2.6 SPARK GENERATOR
• Remove the power connections
• Remove the ignition cable
• Remove the 2 fixing screws
• Replacement is the reverse
6.2.7 COMbuSTION FAN
The combustion fan is best removed when the whole burner assembly has been detached from the heat ex-
changer (see 6.1.1.1), but can also be removed individually if these steps are followed:
• Turn OFF the electricity to the heater.
• Carefully remove the two electrical connectors from the fan.
• Remove the two cap screws securing the venturi to the fan.
Cap screw
• Remove the four bolts securing the fan to the air arm.
Connector
• Slide fan off venturi and remove
• Inspect both the venturi gasket and air arm gasket and replace if damaged.
• Replacement is the reverse
CAuTION
Please ensure that the cork gasket between the fan and the venturi is correctly placed before fixing
the two venturi screws. Place a screw through the venturi to hold the gasket in place when refitting
to fan
• Operate the heat engine and check for gas leaks. After five minutes check the rate and combustion is cor-
rect to the table on page 11. Adjust using the throttle screw on the gas valve clockwise to decrease CO
anti-clockwise to increase CO
Maintenance
Fixing screws
if required. (see 5.0 for details)
2
62
Power connections:
White = 1
Red = 2
Cap screw
Bolts
2
MAXXflo EVO