Project Name
Project Number
UEPH Complex
Statement of Work
26 November 2001
2. Fans shall be double-inlet, centrifugal type with each fan in a separate scroll. Fan bearings
shall be sealed against dust and dirt and shall be precision self-aligning ball or roller type.
Bearing life shall be L50 rated at not less than 200,000 hours as defined by AFBMA Std 9 and
AFBMA Std 11. Bearings shall be permanently lubricated or lubricated type with lubrication
fittings readily accessible at the drive side of the unit.
10-7.2
Rooftop air handling units shall not be used.
10-7.3
Warm air furnaces. Furnace shall be a manufacturer's standard, self-contained,
forced circulated air heating type furnace. Furnace and furnace components shall be
completely factory-assembled and wired. Furnace casing shall be factory insulated and be
compatible with the operating temperatures. Furnace shall be provided with removable service
panels which allow access to all internal components requiring cleaning, servicing, or
adjustment.
10-7.3.1 Gas-fired furnace. Shall be the [conventional] [high efficiency, condensing] type in
accordance with ANSI Z21.47. Furnace design shall be certified by the AMERICAN GAS
ASSOCIATION LABORATORIES (AGA). Gas-burning equipment shall include the gas burners,
ignition equipment, gas-control valve, gas piping, gas-pressure regulating valve, when
applicable, and accessories necessary for a fully automatic system that is listed in IAS Directory.
Gas-fired units equipped with programming controls shall be furnished both with high and with
low gas supply pressure switches in the fuel supply piping. Ignition systems shall be of the
direct spark, hot surface, or interrupted intermittent type with automatic electric ignition. The
pilots shall be of the electrically-ignited proven type. Continuous pilots will not be permitted.
Burner shall be designed in accordance with NFPA 54 and located so that parts are protected
against overheating. Provisions shall be made in the burner housing for inspection of the pilot
flame. Vent piping shall be in accordance with UL 441, [Type B] [Type BW]. Vent shall conform
to NFPA 211 and NFPA 54. Plastic materials polyetherimide (PEI) and polyethersulfone (PES)
are forbidden to be used for vent piping of combustion gases. [Direct venting shall be used for
high efficiency, condensing type furnaces. Both the air intake and exhaust vents shall be sized
and located as recommended by the furnace manufacturer. A separate combustion air intake
vent and exhaust shall be provided for each furnace. The combustion air intake piping shall be
constructed of Schedule 40 PVC in accordance with ASTM D 1784. The exhaust vent piping
shall be constructed of Schedule 40 CPVC or stainless steel in accordance with UL 1738 and
the furnace manufacturer's recommendations.]
10-7.3.2 Oil-fired furnace. Shall be in accordance with UL. The equipment shall include the oil
burner motor, ignition equipment safety devices, and accessories necessary for a full automatic
system that conforms to UL 296. Oil-fired units equipped with programming controls shall be
furnished with low oil-pressure switches in the fuel supply piping. Oil-fired units not equipped
with programming controls shall be equipped with a delayed opening or shutoff valve. The
valve shall automatically delay delivery of oil to the burner until such time as the combustion air
fan and, when applicable, the induced draft fan are operated at rated speed. Ignition systems
shall be of the [direct-electrical spark type] [direct-electric spark type or interrupted type] in
accordance with UL 296. Vent piping shall be in accordance with UL 641, Type L. Vent shall
conform to NFPA 211. Plastic materials polyetherimide (PEI) and polyethersulfone (PES) are
forbidden to be used for vent piping of combustion gases.
SOW-136
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