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I-OH (01-20) PN120390R7
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The boost pump operates full time during the heating season and must run continously.
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All manifold and feeder lines must run in a horizontal plane at an elevation above the fuel intakes of the units.
Extend feeder lines downward to fuel burner intakes.
Pressurized System
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The pressurized system (see
) uses a boost pump to supply fuel oil to a manifold with branch lines that
supply each heater. The end of the manifold is capped, and the system is operated at a pressure not exceeding
3 psi at the first burner supplied.
Figure 7. Pressurized Supply System for Multiple-Unit Installations
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BTU output is determined by boost pump capacity and by the subsequent number of burners that can be supplied
adequately by fuel oil. For example, a 30-GPH booster pump will sustain eighteen 1.65-GPH burners.
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An optional solenoid valve is recommended to protect burner pump seal against excessive pressure. Optional
pressure switch monitors nozzle pressure and will start booster pump on pressure fall.
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Boost pump operation in a pressurized system may be continuous or may be intermittent when optional pressure
switches are used.
Boost Pump Assembly (Option DA1 or DA2)
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The boost pump is equipped with a motor and is supplied with a two-stage fuel unit that incorporates a regulator
valve and strainer.
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The regulator valve acts as a check to prevent the loss of oil supply between the boost pump and the burner, thus
assuring instantaneous starts following shutdown periods. The regulator valve also prevents excessive pressures.
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The complete assembly with the motor is approximately 15 inches long × 7-1/2 inches high × 6-3/4 inches wide
(381 × 191 × 171 mm). The dimensions for the boost pump mounting bracket are shown in
.
Figure 8. Boost Pump and Mounting Bracket
Boost Pump Bracket
Mounting Dimensions
(Bottom View)
Boost Pump
