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Complete Compiled Specification.pdf - Peck Ormsby Construction

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WATER TREATMENT FOR HOT WATER SYSTEMS:<br />

Contractor shall furnish and install chemical treatment of the boiler water system on initial start-up to prevent the<br />

formation of scale, corrosion, sludging, and carry-over. Furnish and install a bypass chemical feeder equal to<br />

Dearborn Aqua-Serv on the boiler water make-up line as shown on the drawings. The chemical supplier shall<br />

analyze the raw water and prescribe the proper treatment formulation for the boiler system.<br />

UNIT HEATERS:<br />

Furnish and install in the locations shown on the plans a propeller fan unit heater of the type and rating specified.<br />

Each unit to have capacity, air delivery, and motor characteristics as shown on the schedule and shall be for the<br />

duty as shown on the plans.<br />

Unit heater coils shall be constructed of copper tubes with .035" thick walls, plate-type aluminum fins and steel<br />

headers. Tubes shall be expanded into the integral fin collars. The complete assembly shall be tested at 500<br />

pounds hydrostatic pressure. Adequate provisions shall be made for expansion and contracting of coils within<br />

the casing.<br />

Unit casings shall be of not less than 16 gauge steel. All casings to be phosphatized for rust resistance and<br />

finished with a baked enamel. All hard shall be plated for rust resistance.<br />

Motors and fans shall be designed for unit heater service and shall be tested for continuous duty as applied on<br />

each size to eliminate vibration and minimize sound. Heater design shall incorporate means for adequately<br />

cooling the motor when heat is on but the fan is not operating.<br />

Horizontal delivery units shall be equipped with formed louvers, 4-way individually adjustable.<br />

Vertical delivery units shall be provided with the diffuser specified.<br />

Unit heaters shall be Airtherm, Trane, Erincraft, or Modine.<br />

PART 3 – EXECUTION<br />

COORDINATION:<br />

All equipment and piping shall be arranged to allow for easy maintenance and access to service valves.<br />

Provide valves and unions or flanges at all pieces of equipment to allow maintenance.<br />

Install all control dampers, sensors, etc., as directed by the control contractor.<br />

____________________________________________________________________________________________________________________________________________________________________________________<br />

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SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDITION March 2, 2009<br />

HEATING-COOLING 15700-21

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