Section: Drive Component Maintenance
B. Pump Maintenance
General Pump Information
Important information - Long or oversized inlet lines may require the pump to operate dry during initial bleeding period. In such cases, the priming may be assisted by injecting fuel oil in the pump gear set. Under lift conditions, lines and fittings must be air tight. To assure this, “Pipe Dope” may be applied to both the used and unused inlet and return fittings. Do NOT use Teflon tape or compression fittings
Mounting Position - Beckett CleanCut pump may be mounted in any position (except
Vacuum Check - A Vacuum Gauge may be installed in either of the 1/4” NPT inlet ports.
Pressure Check- When a pressure check is made, use the nozzle port. If the bleed port is used, the reading on the gauge should be approximately 5 psig higher than the pressure reading on the nozzle port. See Figure 8.
Cutoff Check - To check cutoff pressure dead head a pressure gauge in the nozzle port. Run the burner for a short period of time. Shut the burner off. The pressure will drop and hold above zero. Pressurized or gravity feed installations must not exceed 3 psig on inlet line or return line at the pump per NFPA 31. A pressure greater than 10 psig may cause damage to the shaft seal.
C. Valve Coil and Stem Replacement
To determine if the valve coil requires replacement perform the following steps.
1.Remove the cord set from the valve.
2.Place the leads from an ohmmeter across the coil.
3.A 12Vdc volt coil should measure between 15 and 25 ohms.
4.If the meter indicates an open circuit, replace the coil.
Figure 8. – Pump and Valve Assemblies
To check pump operation perform the following.
1.Check the operating pressure by removing the copper tubing from the nozzle line and installing a pressure gauge in the line. With the motor running and the coil energized, check the gauge. The pressure should read 100 psig unless otherwise stated.
2.To check the cutoff function, deadhead the pressure gauge onto the copper connector tube attached to the nozzle port. Run the burner for a short period of time. Shut the burner off; the pressure should drop and hold.
To replace the coil and/or pump assembly perform the following steps.
1.Before servicing, turn off and/or disconnect all power to the burner.
2.Remove the copper tube assembly when replacing the pump or when removing the coil and the tube blocks the coil.
3.Using a flat tip screwdriver, press the flat tip into the spring washer to prevent it from rotating.
4.Using a 10mm wrench or adjustable wrench, remove the nut and spring washer.
5.Remove the coil by lifting it straight up.
6.Remove the two base plate screws, then the base plate by lifting straight up.
7.Remove valve stem assembly by pulling straight up.
8.To install the new stem and coil assemblies, follow the above steps in reverse order, tightening each part as you go.
9.Restore power, start the burner and perform the combustion test described previously in this manual.
Start Up Burner & Set Combustion
10mm Nut | Spring Washer |
| |
| Cordset |
Coil |
|
Base Plate |
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Stem Assembly | Pump Assembly |
| |
Nozzle Port |
|
Fitting |
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| Bleed Valve |
| SK9810 |
10 |
|
A. Basic Burner Operation
Typical Constant Duty Ignition Configuration - With this Beckett ADC oil burner configuration, the motor and igniter operate continuously while the valve that controls oil flow is cycled by the switches on the power washer. The motor is used to drive the blower and pump. The rotational speed of the motor is determined by the voltage supplied and the load placed on the motor. Pump pressure and air settings are the main factors affecting the motor load. The igniter converts battery DC voltage into a high voltage spark to ignite the oil. The igniter is capable of running continuously as long as the blower wheel is circulating air across the igniter base. The pump and solenoid valve are used to control the flow of oil from the reservoir to the nozzle.
