0307SCA0AMEN
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8.2 Burner injectors
1. carry out steps 1 to 6 of section 8.1.
2. Unscrew the main burner injectors.
3. Re-fit new injectors.
4. Re-assemble in reverse order.
8.3 Ignition system
To access the ignition system, follow steps 1 to 3 in section 8.1.
Ignitor
(PN 03 400US 42)-
refer to figure 9 and locate the ignitor (on
the side of the burner rack). Disconnect the wire, remove the screw and
the ignitor. Clean with an emery cloth.
Note: Spark gap must be maintained to 3.0 mm See
figure 10a.
Re-fit the ignitor as per figure 10b.
CAUTION: Due to high voltage on the spark wire and electrode, do
not touch when energised. See hazard levels.
Flame sensor -
Refer to figure 9 and locate the flame sensor.
Disconnect the wire, remove the screw and the flame sensor. Clean with
an emery cloth.
Ignition controller -
The enclosed integrated circuit monitors the
operation of the burner including ignition. Do not attempt to dismantle
the ignition controller. Each heating season lead wires should be
checked for insulation deterioration and good connections.
Proper operation of the direct spark ignition system requires a
minimum flame current of 1,0
µ
A when measured with a micro
ammeter.
Fig. 10a - Ignitor assembly
Fig. 10b : Fitting the ignitor
For further information and checkout procedure of the direct spark
ignition system, refer to the manufacturers control operating instructions
a copy of which is supplied with the air heater
.
8.4 Replacement of fan motor and/or fan blade
Follow these instructions for the replacement of the
fan guard, fan motor or fan blade/s.
1. If the air heater is installed, turn OFF the gas supply
to the air heater.
2. After the fan has stopped switch OFF the electricity
supply to the air heater.
3
Open the access panel and disconnect the wiring to
the fan motor.
4. Remove the complete fan assembly.
5. Dismantle and replace whatever part(s) are needed
and re-assemble.
6. Ensure that the fan blade/s is in the correct position
on the shaft referring to the table and figure 11.
Fig. 11 Proper position of fan blade on motor
shaft
Position the assembly on the air heater. Attach the
fan guard.
Rotate the fan blade manually to ensure adequate
clearance. If adjustment is necessary, loosen the
mounting screws, reposition the fan guard, and then
retighten the screws. Rotate the fan blade and check
the clearance. Repeat the above procedure as
necessary.
7. Reconnect the fan motor wiring and close the access
panel.
8. Restore the electrical power supply to the air heater
and turn on the gas supply to the air heater. Follow
the lighting instructions displayed on the air heater.
Check for correct operation.
8.5 Multi-functional gas control valve
1. Ensure gas supply to the air heater is turned
OFF.
2. After the air circulation fan has stopped, switch OFF
the electricity supply to the air heater.
3. Mark for future identification and disconnect the
wires connected to the valve.
Model size
45
60
→
125
150
→
200
250
→
300
'A' hub to motor
29 mm
51 mm
64 mm
83 mm