Installation Manual

Form I-OH, PN 120390 R5, Page 9
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.
6.1.4 Pressurized System
A pressurized system is one in which a boost pump is used to supply fuel oil to a
manifold for which branch lines supply each heater. The end of the manifold is capped,
and the system is operated at a pressure not exceeding 3 psi at the rst burner sup-
plied. BTU output in this type of system is determined by boost pump capacity and
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. An optional
solenoid valve is recommended to protect burner pump seal against excessive pres-
sure. Optional pressure switch monitors nozzle pressure and will start booster pump
on pressure fall.
Boost pump operation in a pressurized system may be continuous or may be intermit-
tent when optional pressure switches are used.
6.1.5 Boost Pump Assembly (Option DA1 or DA2)
The boost pump is equipped with a motor and is supplied with a two-stage fuel unit
incorporating a regulator valve and strainer. The valve acts as a check to prevent loss
of oil supply between the boost pump and the burner, thus assuring instantaneous
starts following shutdown periods. Regulator valve also prevents excessive pressures.
Complete assembly with motor is approximately 15" (381mm) long, 7-1/2" (191mm)
high and 6-3/4" (171mm) wide overall.
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FIGURE 7 -
Pressurized Supply
System (multiple
units)
Boost Pump will run
intermittently. See
Paragraph 6.1.5.
FIGURE 8 - Boost
Pump and Mounting
Bracket
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Boost Pump
Bracket
Mounting
Dimensions
(Bottom View)
Boost Pump
30GPH/70GPH
TABLE 7A - Maximum Horizontal Length from Boost Pump to Burner(s)
Boost Pump GPH
1/2" OD Tubing 1/2" Pipe 3/4" Pipe
ft M ft M ft M
Option DA1 30 175 53.3 300 91.4 1800 548.6
Option DA2 70 50 15.2 100 30.5 600 182.9
Boost Pump Capacities
Maximum Height from Boost Pump to Burner -- 35 feet (10.7M).