CleaverBrooks FLX 1000, Operation, Service And Parts Manual

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Chapter 2 Profire V Burner
2-20 750-177
When the conditions covered above and in Section 2 are assured, the burner is ready for firing. Refer to Section
E for starting and operating information.
Oil Burners
Prior to initial firing, oil flow and pressure should be verified. If the burner is a dual fuel model, make certain
that the main gas shutoff cock is closed and the fuel selector switch is set to OIL.
If the oil supply tank is below the level of the oil fuel unit, it is recommended that the suction line be primed
with oil prior to starting the pump to avoid the possibility of damage to the pump through operation without
lubrication.
To check for proper pump rotation, momentarily energize the starter. With rotation verified, operate the pump
to determine that oil circulation exists. Observe the oil burner pressure gauge. If not pressure shows after a
few moments, stop the oil pump and re-prime. If the supply tank is lower than the pump, it is possible that
the initial priming of the suction line, followed by operation of the pump, will not establish oil flow. This might
be caused by obstruction in the suction line, excessive lift, inadequate priming, suction line leaks, etc. Until
oil flow is established, avoid prolonged operation of the pump. If oil flow is not established after a second
priming, investigation is required.
A vacuum (or compound pressure-vacuum) gauge should be installed at the suction port of the pump. It is
advisable that the reading be less than 15” Hg vacuum. Vacuum in excess of this may cause unstable firing.
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.
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.
TEST EQUIPMENT
The following test equipment should be on site:
• Combustion analyzer with O2 indication.
• U-Tube manometer, or pressure gauge, to measure gas pressures (main and pilot), pressures and vacuum gauge for
the oil burners.
• Inclined manometer to measure draft pressures.
• Smoke spot tester for oil burners and CO analyzer for gas fired units.
• Voltmeter/Ammeter.
• Stack Thermometer and Thermocouples