CleaverBrooks CB Ohio Special 100 HP, Operation, Service And Parts Manual

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Chapter 5 — Starting and Operating Instructions
5-8 Part No. 750-184
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.
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.
Suggested oil pressures at high fire operation:
!
Caution
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.
Oil Temperature - After determining that the heater shell is filled
and that fuel oil circulation exists, turn the oil heater switch to “on.”
Adjust the electric oil heater thermostat to maintain oil temperature
at approximately 200
°
F.
The electric heater on burners equipped for No. 6 fuel oil is sized
so that it is capable of supplying heated oil at a rate no greater than
that required for low fire operation and is primarily supplied for
convenience on cold starts. Heating coils utilizing either steam or
hot water are supplied to provide sufficient heat so that higher rates
of firing can be accomplished once steam pressure or hot water is
available. In normal operation, the thermostat governing the electric
heating element is kept at a lower setting than the thermostat
governing admission of steam to the heater, or of hot water
circulation, so that heating is not performed electrically except when
steam or hot water is not available.
Set the steam thermostat or the hot water thermostat to maintain
an oil temperature of 220-230
°
F. The electric heater will be turned
off automatically as soon as steam or hot water provides heat.
Note: The temperatures listed are tentative. The composition of the
fuel oil in a given grade can vary, necessitating a higher or
lower preheating temperature. The viscosity of the oil at the
nozzle should be less than 300 SSU and preferably less than
Oil Supply at the Fuel Oil Controller 75 psi
Regulated Oil Pressure Gauge 30-45 psi