and any burner mounted pump. Select type I:
simplex unit or type II duplex unit. Indicate the
design requirements of filter/basket strainer
located ahead of electric oil heater in order to
match characteristics of fuel oil to be utilized.
Select single filter/basket strainer for boilers
below 60 kW (200,000 Btuh).
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The integrated, shop-fabricated oil pumping and heating set shall be
[simplex] [duplex] and be UL approved. Two positive displacement oil
meters shall be provided. One meter shall be located on the fuel supply
line. The other meter shall be located on the fuel return line. Each set
shall include an electric oil heater of adequate capacity to heat the
specified fuel oil to ignition temperature at low boiler load until enough
[hot water] [steam] is generated to operate the heat exchanger. The
electric heater shall be controlled by magnetic starter with a
manually-operated On-Off switch in series with a thermostatic control.
When oil temperature is raised to proper level and maintained by the [hot
water] [steam] heater, the electric heater shall be disconnected
automatically by the thermostatic control. Fuel pumps shall be
electric-motor-driven. Each pump shall have the capacity of not less than
[_____] L/s gpm at a discharge pressure of [_____] kPa psig with a suction
lift of 3.74 kPa 15 feet. A [duplex] [single] filter/basket strainer
system shall be installed ahead of the electric oil heater and final
discharge filter/strainer system.
2.4.2
Hot Water and Boiler Circulating Pumps
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NOTE: If separate pumps are not needed to provide
water flow to the boilers, delete the requirement
for boiler circulating pumps. The flow switch or
pressure switch will only be needed for the pump
which provides flow through the boiler. Pipe
supported pumps are typically available up to 1.49
kw (2HP). Closed-coupled pumps are typically
available up to 3.72 kw (5HP).
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Circulating pumps for hot water shall be electrically driven single-stage
centrifugal type and have a capacity not less than indicated. [Boiler
circulating pumps shall be supported [on a concrete foundation with a cast
iron or structural steel base] [or] [by the piping on which installed] and
shall be [closed-coupled shaft] [or] [flexible-coupled shaft]. The boiler
circulating pumps shall be [horizontal split case] [vertical split case]
type]. [Hot water circulating pumps shall be supported [on a concrete
foundation with a cast iron or structural steel base] [or] [by the piping
on which installed] and shall have a [closed-coupled shaft] [or]
[flexible-coupled shaft]. The hot water circulating pumps shall be
[horizontal split case] [vertical split case] type]. The pump shaft shall
be constructed of corrosion-resistant alloy steel, sleeve bearings and
glands of bronze designed to accommodate a mechanical seal, and the housing
of close-grained cast iron. Pump seals shall be capable of withstanding
115 degrees C 240 degrees F temperature without external cooling. The
motor shall have sufficient power for the service required, shall be of a
type approved by the manufacturer of the pump, shall be suitable for the
available electric service, and shall conform to the requirements of
paragraph ELECTRICAL EQUIPMENT. Each pump suction and discharge connection
SECTION 15569A
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