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2. IGNITER
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The Igniter plays two roles of preheating and ignition
heaters.
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The Heater is print-incorporated into the ceramics; therefore,
it is capable of obtaining a short time of red heating of
approximately 30 sec. The electric current is turned on only
for preheating, while it is turned off during combustion.
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The initial resistance at a room temperature of 23 °C stays
at 40 to 49
Ω
.
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In case of a failure of the Igniter or a gas leak, disassemble
the Igniter as per the
4. OVERHAULING PROCEDURE
.
The Igniter Gasket is deteriorated by heat, which loses its
Gasket effect if once taken off. Be sure, therefore, to use
the new Igniter Gasket when the Igniter is reassembled.
CAUTION
The Heater is colored in gray (white at SRE
260), while the lead wire is colored in white (red
at SRE 260).
3. BURNER THERMISTOR
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The Burner Thermistor is an important part to detect the burner bottom
temperature. Be sure to connect the Burner Thermistor to the Main Circuit Board before
starting the Heater. For replacing the Burner Thermistor, coat the screw part of the
Thermistor with adhesive and tightly screw them in. Since the lead wire is thin and
easy breakable, sufficient care is to be given not to twist it when reassembling the
Burner Thermistor.
CAUTION
High temperature Thermistors, which vary their standard resistance, are
used for the Burner Thermistor depending on the application. Be sure
when replacing the Thermistor which suits the model of the Burner or the
Heater.
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Standard resistance’s of Burner Thermistors:
Color of Lead Wire
20 °C
250 °C
300 °C
B constant
Orange
Approx. 120 M
Ω
58 k
Ω
25 k
Ω
5100
Blue
Approx. 120 M
Ω
70 k
Ω
31.5 k
Ω
5100
Yellow and White
Approx. 20 M
Ω
8 k
Ω
3.34 k
Ω
5250
4. FUEL PUMP
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Minute care is to be taken in the cleaning of the Fuel Pump not to cause dust or dirties to
the Pump. Such a dust that is not visible may have influence on the flow rate of fuel.
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Clean the Suction Filter and the Discharge Outlet with kerosene.
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The Pump itself is not capable of checking the flow rate, since the frequency which
determines the flow rate is incorporated in the CPU of the Main Circuit Board from which
the signal for each flow rate is emitted.
CAUTION
For reassembling the Fuel Pump, sufficiently remove kerosene from the
Pump to prevent any dust from adhering to the Pump.
Lead Wire
Igniter
Registance Range
