CleaverBrooks 4WI, Руководство по эксплуатации, обслуживанию и запасным частям

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Starting and Operating Instructions
5-8 750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
5.6.1 — Oil Flow
Open all valves in the oil suction and oil return lines. Open the
bypass valve on the fuel oil controller until oil flow is established.
Normally, the orifice valve is left in a closed position. However, on
cold starts, it may be opened for brief periods to aid in establishing
oil flow. The bypass and orifice valves must be returned to their
closed positions as soon as oil flow is established as indicated by a
reading on the oil supply pressure gauge. Do not attempt to set
pressures while valves are open.
FIGURE 5-8.
Heavy Oil Controller
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. 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 provide oil viscosity to
permit flow through the oil pump and suction line. If oil flow is not established after several attempts, the condi-
tions preventing oil flow must be determined and corrected to avoid damage to the pump’s internal mechanism.
A vacuum gauge should be installed in the oil suction line and its reading observed and recorded for future guid-
ance.
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 fir-
ing rate a minimum reading of 75 psi is obtained on the oil supply pres-
sure gauge.
The other pressure adjustments are to the regulators on the fuel oil con-
troller. 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 regis-
ters approximately 35 psi. Adjust the back pressure relief valve so that
its gauge reads about 10 psi less than the burner gauge.
FIGURE 5-9.
Heavy Oil Pressure Relief Valve
After the burner is firing, further adjustments can be made to the valves, if necessary.
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.