1. To start the boiler sequence cycle, set the boiler
thermostat knob to 80°C. The glo-coil ignition and airfan
become energised with switch-on.
2. After 1 minute of energisation, the pilot solenoid valve
opens, and admits a pilot supply of oil into the pilot
reservoir at the front of the boiler burner.
3. The pilot oil supply becomes ignited within 30 seconds
of entry and this pilot fire then progressively heats an
adjacent thermocouple until a temperature of about 300°C
is attained by the thermocouple after about 1 minute of
flame.
4. The temperature confirmed, the thermocouple
switches the main oil solenoid ON to admit oil at full rate,
which then cross lights from the pilot flame.
At the same time, power is isolated from the glo-coil and
pilot solenoid valve, resulting in a pilot oil shut-off
condition.
5. The burner continues to run at main oil rate, under
control of the boiler thermostat until satisfied.
NOTE: IF FOR ANY REASON, ONE OF THE
FUNCTIONS ARE NOT CARRIED OUT IN POINTS 1-4,
A LOCK-OUT CONDITION WILL OCCUR AT THE END
OF THE TIMING SEQUENCE, OR, THE SEQUENCE
WILL NOT COMMENCE.
6. With the boiler interruption, power is isolated from the
main oil solenoid valve, but the fan remains energised on
an overrun, to burn all the oil in the burner and cool the
thermocouple down in temperature, taking about 5-6
minutes.
With reduction in temperature of the thermocouple, the
fan becomes, de-energised, and power is isolated, until
the boiler thermostat calls for heat. With thermostat call,
the sequence re-commences.
Confirmation of oil rates and combustion must be made
as a final check.
These can be carried out using the Drip Feed Method.
1. Confirm the cooker burner base is level in all directions.
2. Confirm the static oil depth in the cooker burner base is
6mm after a 15-20 minute period.
3. Check the low fire oil rate - 4.75cc/min on low.
4. Check high fire rate - 13.0-13.5cc/min.
5. Assemble burner and light.
After 30 minutes on high fire, sample the flue products in
the flue chamber for a Smoke Test which should indicate
a Baccarach Smoke No. 0-1.
6. Leave the cooker thermostat nob set to
MAX
.
1. Check main burner oil rate - 38-40cc/min.
2. Check pilot burner oil rate - 20cc/min minimum.
3. Connect oil supply pipes.
4. Connect manometer tube to test point nipple.
5. Switch ON power supply and set boiler thermostat
knob to 80°C whereupon the glo-coil igniter and airfan will
become energised.
6. Confirm the initial cold windbox air pressure of 3.1mm
w.g. (0.125 w.g.) which on hot cycling, should rise to a
stable 4.1mm w.g. (0.165in w.g.).
NOTE: LOW PRESSURE INDICATES A LEAKING
GASKET SEAL BELOW THE WINDBOX OR AROUND
ITS FRONT DOOR.
7. Adjust excess air pressure via air pressure adjustment
flan on top of air duct at L.H. side of appliance, disconnect
manometer and re-plug the test nipple.
8. Allow the boiler burner to operate for 2-3 cycles, then
during a boiler
ON
period, sample the flue products within
the boiler flue chamber where a Baccarach Smoke No. 0-
1 should be confirmed.
9. Combustion Analyser
Using the Combustion Analyser in the boiler flue duct
sampling hole, the following readings should be achieved:
CO
2
9 - 9.5%
CO
PPM 15-20
O
2
8 - 9%
POST SERVICE CHECKS
LIGHTING SEQUENCE
COOKER
20
BOILER
