specified in paragraph entitled "Motors and Drives."
Provide NEMA 4
control enclosures.
2.14.7
Sump Pumps
FS A-A-50555 with automatic float switch and disconnect switch in NEMA 6
enclosure.
2.14.8
Water Softening System
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NOTE: One hundred percent makeup shall be assumed
in calculating the sustained softening rate.
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Ion exchange resin type conforming to WQA S-100 except as modified below.
[Manual] [Push button automatic] [Fully automatic] in operation with
operating controls housed in a NEMA 12 enclosure having a minimum total
capacity between regenerations of [_____] liters gallons of water of [_____]
grams grains hardness when operated at a sustained softening rate of
[_____] L/s gpm. Maximum effluent water temperature shall be [_____]
degrees C F.
2.14.8.1
Softener Equipment
Including but not limited to the following:
a.
Water Hardness Monitor: Provide with an alarm point at 1.0 ppm to
ensure compliance for boilers rated above 3150 grams/sec 25,000
lb/hr.
b.
Total Solids Monitor and Controller: Provide a continuous monitor
and controller (when required) to control concentration of
dissolved solids and treatment chemicals in water for boilers
rated above 3150 grams/sec 25,000 lb/hr.
c.
Water Meter: Provide a [_____] mm inch cold water meter on each
softener unit.
d.
Ion Exchange Resin: High capacity, polystyrene base, sulfonated
synthetic type except that exchange capacity shall be not less than
68.70 kg per cubic meter 30 kilograins per cubic foot at a salt
dosage of 240 kg per cubic meter 15 pounds per cubic foot.
e.
Tank Sizing: Minimum acceptable bed depth of 762 mm 30 inches;
maximum acceptable bed depth of 1829 mm 72 inches. Base reactor
tank sizes on allowing a freeboard above the resin bed of not less
than 75 percent of resin bed depth, and flow rate between 1.11 and
7.13 L/s per cubic meter 0.5 and 3.2 gpm per cubic foot of resin.
2.14.8.2
Brine Storage System
Provide complete, including fiberglass storage tank, sight level gage, bulk
salt delivery tube, internal distribution system, level control system,
tank vent with dust collection system, top and side manholes, access
ladder, and other required appurtenances.
a.
Storage Tank: Filament wound fiberglass with flat bottom and
domed top as recommended by the manufacturer for brine storage.
SECTION 15501N
Page 133
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