2.8.3
Heating Elements
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NOTE: For project designs requiring air-supply and
distribution systems, consider using the optional
choice of referencing Section 15895 AIR SUPPLY,
DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM for
the equipment in this paragraph.
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[Heating coils and radiating fins shall be of suitable nonferrous alloy
with [threaded] [brazed] fittings at each end for connecting to external
piping. The heating elements shall be free to expand or contract without
developing leaks and shall be properly pitched for drainage. The elements
shall be tested under a hydrostatic pressure of 1.38 MPa 200 psig and a
certified report of the test shall be submitted to the Contracting
Officer.] [Heating coils shall be as specified in Section 15895 AIR
SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM for types indicated.]
Coils shall be suitable for use with water up to 121 degrees C 250 degrees
F.
2.8.4
Motors
Motors shall be provided with NEMA 250 general purpose enclosure. Motors
and motor controls shall otherwise be as specified in Section 16402
INTERIOR DISTRIBUTION SYSTEM.
2.8.5
Motor Switches
Motors shall be provided with manual selection switches with "Off," and
"Automatic" positions and shall be equipped with thermal overload
protection.
2.8.6
Controls
Controls shall be provided as specified in Section 15951 DIRECT DIGITAL
CONTROL FOR HVAC AND OTHER LOCAL BUILDING SYSTEMS.
2.9
HEATING AND VENTILATING UNITS
Heating and ventilating units and associated equipment shall be in
accordance with Section 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND
EXHAUST SYSTEM.
2.10
AIR HANDLING UNITS
Air handling units and associated equipment shall be in accordance with
Section 15895 AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM.
2.11
FITTINGS AND ACCESSORIES
Boiler fittings and accessories shall be installed with each boiler in
accordance with ASME BPVC SEC IV, unless otherwise specified.
2.11.1
Soot Blowers
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NOTE: Soot blowers will normally be required on
large water tube units burning No. 5 or 6 fuel oil.
SECTION 15569A
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