2.2.2.2
Water Reservoirs
Fabricate tank from minimum 20 gage zinc-coated steel, bronze, or stainless
steel, with a capacity of 19 liters 5 gallons water for each 472 L/s of air
1,000 cubic feet of air per minute passing through the cooler section.
Coat the entire reservoir surfaces with minimum 0.254 mm 10 mils bituminous
coating applied after fabrication.
2.2.2.3
Automatic Flush (Electric Dump) Valves and Timers
Provide cast bronze valves with neoprene-diaphragm solenoid and timer.
2.3
FAN PLENUMS
Provide gaskets for plenum covers on all edges which contact sides of
sheet-metal plenum with continuous 3 mm 1/8 inch thick butyl-rubber gasket
with pressure sensitive backing. Insulate plenum interior, including
covers with duct liner. Provide fresh-air intake hoods with bird screens.
Install automatic dampers in the fresh-air intake hoods.
2.4
BIRD SCREENS, FRESH-AIR INTAKE HOODS, AND DUCTWORK
Section 15810N DUCTWORK AND DUCTWORK ACCESSORIES.
2.5
THERMOSTATS, AUTOMATIC DAMPERS, AND DAMPER ACTUATORS
Section 15901N SPACE TEMPERATURE CONTROL SYSTEMS.
2.6
ROOF CURBS
Provide factory-fabricated sheet-steel structural members. The curbs shall
have high load-bearing capacities attained by a system of internal
bulkheads, welded into position at logical intervals along the length of
rails. Provide minimum 100 mm 4 inch cants, 50 by 150 mm 2 by 6 inch
factory-installed wood nailers, and fully mitered end sections. Use welded
18 gage galvanized steel shell, base plate, and counterflashing.
2.7
VIBRATION ISOLATORS
[Factory-fabricated, high static and double deflection type. Mold metal
parts in oil-resistant neoprene, with color codes by type and size for
identification of capacity. Provide bottom steel plates with bolt holes
for bolting to equipment bases to prevent movement of equipment.] [Section
15070N MECHANICAL SOUND VIBRATION AND SEISMIC CONTROL.]
2.8
PLUMBING
Section 15400 PLUMBING SYSTEMS.
2.9
MOTORS AND MOTOR STARTERS
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NOTE: The motor control requirements should be
coordinated with the Electrical Section and will
depend on field conditions. The following types of
motor starters should be used as a guide only. When
electrical equipment is connected to heavily loaded,
power circuits the starting current may cause
excessive voltage drop.
SECTION 15721N
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