CleaverBrooks FLX Operation, Service And Parts Manual page 30

Chapter 2
OIL PRESSURE AND VACUUM
If the vacuum gauge reads higher than calculated, look for
restriction in the suction line, a closed valved, kinked copper
tubing, plugged filter, sticking check valve, frozen oil line,
undersized oil line, or excessive lift.
When there is a positive head of oil at the fuel unit, either
from a gravity or by pump circulation, the pressure must not
exceed 3 psi at the fuel unit suction inlet. Special pressure
regulating valves are available for suction pressure above 3
psi. The fuel unit discharge pressure should be set at 300 psi.
BURNER SETTINGS
To ensure reliable and safe burner performance, the location
and gap setting of the electrode for direct spark igniters, and
the relative positions of the burner nozzle, diffuser, and air
baffle components must be correctly set. The air damper
blades must be adjusted, relative to the established flow rates
to provide the correct amount of air for complete efficient
combustion.
These items are preset at the factory, but must be checked
prior to placing the burner into initial service, or after
conducting any service work that may have altered their
position.
Refer to Section 4, ADJUSTMENTS, for the instructions.
COMBUSTION SETTINGS
Fuel and air flow rates are individually adjusted at low-fire
and at high-fire to achieve rated heat input, firing rate
turndown, optimum efficiency, safe operation, and the ability
to cope with environmental changes (including air
temperature, humidity, barometric pressure), and fuel
property changes. Refer to the nameplate inside the control
panel for minimum and maximum fuel input ratings.
Refer to Section 4, ADJUSTMENTS, for the instructions.
TEST EQUIPMENT
The following test equipment should be on site:
1. Combustion analyzer with O2 indication.
2. U-Tube manometer, or pressure gauge, to measure gas
pressures (main and pilot), pressures and vacuum gauge
for the oil burners.
3. Inclined manometer to measure draft pressures.
4. Smoke spot tester for oil burners and CO analyzer for
gas fired units.
5. Voltmeter/Ammeter.
2-18
6. Stack Thermometer and Thermocouples.
WARNING
! DANGER
! DANGER
TO PREVENT POSSIBLE SERIOUS INJURY OR
DEATH, READ THE FLAME SAFEGUARD MAN-
UAL AND FULLY UNDERSTAND ITS CONTENT
BEFORE ATTEMPTING TO OPERATE THIS
EQUIPMENT.
! DANGER WARNING
! DANGER
SHOULD A STARTING FAILURE OCCUR FOR
ANY REASON, COMBUSTIBLE FUMES MAY FILL
THE COMBUSTION CHAMBER. NEVER
ATTEMPT TO RE-LIGHT THE BURNER UNDER
THESE CONDITIONS WITHOUT PURGING THE
CHAMBER.
SEQUENCE OF OPERATION
The programming control sequences the operation of all
controls and components through the starting, ignition, firing,
and shutdown cycle. The burner and control system are in
starting condition when:
• The operating and high limit control (temperature or
pressure) are below their cutoff setting.
• All power supply switches are closed.
• Power is present at the control panel.
Refer to the manufacturer's literature on programming
controls and burner wiring diagrams for detailed information.
ELECTRICAL INTERFACE TEST
Prior to putting the burner into service, conduct the following
test to ascertain that ignition spark will not cause the flame
relay to pull in.
GAS FIRED
Close the pilot and main line manual gas valves. Start the
burner and at time of pilot trial with just the electrical ignition
system energized. The flame relay should not pull in (should
not be energized).
Upon completion of successful test, proceed with startup
procedures.
Profire V Burner
CAUTION
CAUTION
750-177