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FIGURE 13. ELECTRICAL DOOR ASSEMBLY
17.4. IGNITION BURNER & ELECTRODE REMOVAL 7 REPLACEMENT
17.4.1 Remove the burner as detailed in paragraph 17.3.
17.4.2 Disconnect the igniter lead from electrode.
17.4.3 Break the gas feed at the burner end of the gas feed pipe.
NOTE:
If, at any time, the gas supply feed pipe is removed from the multifunction control, the ‘O’ ring MUST
be replaced.
17.4.4 Release the 2 screws and washers securing the ignition burner to the main burner assembly and
carefully remove the ignition burner assembly.
17.4.5 Release the electrode securing nut from the ignition burner assembly and withdraw the electrode.
17.4.6 Release the ignition burner feed pipe securing nut from the ignition burner assembly and withdraw
the feed pipe and injector from the ignition burner assembly. Disconnect the ignition burner injector
from the ignition burner feed pipe hook.
17.4.7 Refitting or replacement is in reverse order.
17.6 AIR CIRCULATING FAN, REMOVAL AND CLEANING:
17.6.1 Ensure that the electrical supply is isolated.
17.6.2 Remove the front door from the heater and remove the fixing screws on the electrical door assembly.
17.6.3 Open the door assembly outwards on its hinges, See Figure 13, to gain access to the rear of the
assembly.
17.6.4 Disconnect the fan flying leads from the fan assembly.
17.6.5 Release the fan assembly securing screws and withdraw the fan assembly from the heater cabinet,
avoiding damage to the fan blades.
17.6.6 Remove all dust from both the impeller and motor, taking care to not disturb the balance of the fan.
10.6.7 Refitting or replacement is in reverse order.
10.7 CONTROL MODULE REMOVAL
17.7.1 Ensure that the electrical supply is isolated.
17.7.2 Remove the front door from the heater.
17.7.3 Loosen the top and bottom screws holding the
electrical cover plate in place on the electrical
door assembly. See figure 7.
DO NOT COMPLETELY REMOVE THE SCREWS
AT THIS STAGE.
17.7.4 Remove the cover plate by sliding it upwards,
such that it exposes the control module.
17.7.5 Carefully disconnect the module by lifting the
connecting blocks off the circuit board. See
Figure 13.
NOTE:
There is no need to loosen any of the connection
screws on the connector blocks!
17.7.6 Completely remove the top and bottom cover
plate screws and pull the control module free of
the electrical door assembly.
17.7.7 Fit the new control module in place and partially
fit the cover plate fixing screws.
DO NOT TIGHTEN SCREWS AT THIS STAGE!
17.7.8 Re-connect the module by carefully pushing the
connector blocks onto the circuit board.
10.7.9 Re-fit the electrical cover plate and tighten the
cover plate screws.
17.7.10 Re-establish electrical supply.
17.7.11 Commission air heater and water circulator as described in the relevant sections above.
17.8 TIME CONTROL, SWITCH & LED INDICATOR (DAUGHTER BOARD) REMOVAL
PREPARATION
17.8.1 Ensure that the electrical supply is isolated.
17.8.2 Remove the appliance front door and release the 3 x securing screws on the electrical door assembly.
17.8.3 Open the door assembly outwards on its hinges, See Figure 13, to gain access to the rear of the
assembly.
CONNECTOR
BLOCKS
NOTE:
To disconnect the
module, LIFT the
connector block off the
circuit board. DO NOT
remove the wires form
the blocks.
