with a built-in or surface-mounted high-limit thermostat interlocked
electrically so that the coil cannot be energized unless the fan is
energized. Coil casing and support brackets shall be of galvanized steel
or aluminum. Coil shall be mounted to eliminate noise from expansion and
contraction and be completely accessible for service.
2.7.2.6
Eliminators
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NOTE: Use this paragraph for Navy projects only.
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Equip each cooling coil having an air velocity of over two m/s 400 fpm
through the net face area with moisture eliminators, unless the coil
manufacturer guarantees, over the signature of a responsible company
official, that no moisture will be carried beyond the drip pans under
actual conditions of operation. Construct of minimum 24 gage [zinc-coated
steel] [copper] [copper nickel] [or] [stainless steel], removable through
the nearest access door in the casing or ductwork. Eliminators shall have
not less than two bends at 45 degrees and shall be spaced not more than 63
mm 2-1/2 inches center-to-center on face. Each bend shall have an
integrally formed hook as indicated in the SMACNA FGDCS.
2.7.2.7
Sprayed Coil Dehumidifiers
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NOTE: Use this paragraph for Navy projects only.
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Provide assembly with reinforced, braced, and externally insulated
galvanized steel casing, vertical in-line spray pump, bronze self-cleaning
spray nozzles, galvanized steel pipe spray headers, adjustable float valve
with replaceable neoprene seat, manufacturer's standard cooling coil, and
welded black steel drain tank. Provide overflow drain, make-up, and bleed
connection.
2.7.2.8
Corrosion Protection for Coastal Installations
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NOTE: Use this paragraph for Navy projects only.
Specify corrosion protection for exterior HVAC
equipment, including air handling units, heat
exchanger coil surfaces, equipment casings,
air-cooled water chiller coils, heat pumps, and air
conditioning units, that is exposed to the weather
within 8 km (5 miles) of a sea (salt) water coast.
At these coastal locations, this corrosion
protection is also required on HVAC equipment within
buildings that are subject to the outside weather
conditions. Specifically, equipment requiring
protection is defined as the first HVAC equipment
(excluding louvers) met by the outside air in the
supply air ductwork system.
Specifier shall survey the HVAC equipment market
place, find and specify the manufacturer's standard
off-the-shelve anti-corrosion options for "coastal"
SECTION 15895
Page 33
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