white face. The pointer shall be adjustable. Rigid stem type temperature
gauges shall be provided in thermal wells located within 1.5 m 5 feet of
the finished floor. Universal adjustable angle type or remote element type
temperature gauges shall be provided in thermal wells located 1.5 to 2.1 m
5 to 7 feet above the finished floor. Remote element type temperature
gauges shall be provided in thermal wells located 2.1 m 7 feet above the
finished floor.
2.6.7.1
Stem Cased-Glass
Stem cased-glass case shall be polished stainless steel or cast aluminum,
229 mm (9 inches) 9 inches long, with clear acrylic lens, and non-mercury
filled glass tube with indicating-fluid column.
2.6.7.2
Bimetallic Dial
Bimetallic dial type case shall be not less than 89 mm (3-1/2 inches),
3-1/2 inches, stainless steel, and shall be hermetically sealed with clear
acrylic lens. Bimetallic element shall be silicone dampened and unit
fitted with external calibrator adjustment. Accuracy shall be one percent
of dial range.
2.6.7.3
Liquid-, Solid-, and Vapor-Filled Dial
Liquid-, solid-, and vapor-filled dial type cases shall be not less than 89
mm (3-1/2 inches), 3-1/2 inches, stainless steel or cast aluminum with
clear acrylic lens. Fill shall be nonmercury, suitable for encountered
cross-ambients, and connecting capillary tubing shall be double-braided
bronze.
2.6.7.4
Thermal Well
Thermal well shall be identical size, 15 or 20 mm (1/2 or 3/4 inch) 1/2 or
3/4 inch NPT connection, brass or stainless steel. Where test wells are
indicated, provide captive plug-fitted type 15 mm (1/2 inch) 1/2 inch NPT
connection suitable for use with either engraved stem or standard separable
socket thermometer or thermostat. Mercury shall not be used in
thermometers. Extended neck thermal wells shall be of sufficient length to
clear insulation thickness by 25 mm 1 inch.
2.6.8
Pipe Hangers, Inserts, and Supports
Pipe hangers, inserts, guides, and supports shall conform to MSS SP-58 and
MSS SP-69.
2.6.9
Escutcheons
Escutcheons shall be chromium-plated iron or chromium-plated brass, either
one piece or split pattern, held in place by internal spring tension or set
screws.
2.7
FABRICATION
2.7.1
Factory Coating
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NOTE: For equipment to be installed outdoors,
adequate protection will be specified.
Manufacturers must submit evidence that unit
SECTION 15182
Page 16