CleaverBrooks CBLE, Operation And Maintenance Manual

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Starting and Operating Instructions
5-8 750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
3.
Momentarily energize the fuel oil pump starter to check for proper pump rotation. With the rotation verified,
prime the suction line strainer with oil and turn the fuel oil pump switch to the “ON” position.
4.
Check the oil supply pressure gauge for indication that oil flow is established. If no pressure shows on the gauge
after a few moments, stop the oil pump and re-prime. Heavy oil in the storage tank must be at a temperature to
produce an oil viscosity that will allow the oil to flow through the oil pump and suction line. If oil flow is not
established after several attempts, the conditions preventing oil flow must be determined and corrected to avoid
damage to the pump’s internal mechanism.
5.
A vacuum gauge should be installed in the oil suction line and its reading observed and recorded for future
guidance.
5.6.2 — Oil Pressure
Oil pressure is regulated at several points. The first is at the relief valve at the oil heater. The relief valve should be
set so that at maximum firing rate a minimum reading of 75 psi is obtained on the oil supply pressure gauge.
The other pressure adjustments are to the regulators on the fuel oil controller. Both the pressure regulating and the
back pressure relief valves are equipped with tubing that directs and adds atomizing air pressure to the adjustable
spring pressure. Since the air pump is not running at this time, only tentative adjustments can be made. Without the
air supply, adjust the fuel oil pressure regulator so that the burner oil gauge registers approximately 35 psi. Adjust
the back pressure relief valve so that its gauge reads about 10 psi less than the burner gauge.
After the burner is firing, further adjustments can be made, if necessary, to the valves.
The pressure gauges will indicate higher readings when a flame is present. The pressure will increase as the firing
rate increases. The pressure reading on the two gauges on the controller will, despite the fluctuation, retain a nearly
constant difference of 10 psi.
Final regulation of oil flow to the nozzle can be done, if necessary, by adjusting the metering cam screws as outlined
in Chapter 6.
5.6.3 — Oil Temperature
Suggested oil pressures at high fire operation:
1.
After determining that the heater shell is filled and that fuel oil circulation exists, turn the oil heater switch to
“on.”
2.
Adjust the electric oil heater thermostat to maintain oil temperature at approximately 200º F.
Oil Supply at the Fuel Oil Controller 75 psi
Oil Burner Pressure Gauge 30 - 45 psi
Before turning on the electric oil heater switch, be certain that the heater shell is filled with fuel oil and the flow is
established. Failure to follow these instructions could result in equipment damage.
! Caution