finished floor base. The subfloor and refrigerator floor shall each be not
less than a 100 mm 4 inch thickness of reinforced concrete with the
insulation sandwiched between. The subfloor shall contain drain holes to
drain water seepage. Beneath the floor screeds at refrigerator walls and
partitions, the insulation shall be extended with a 50 mm 2 inch thickness
down to the insulation sandwiched between the subfloor and the refrigerator
floor. The insulation beneath the door shall be as recommended by the
manufacturer. The subfloor shall be supported on a fill of 50 mm 2 inch
clean rock aggregate having a minimum depth of 375 mm 15 inches. In
addition, the perimeter shall be embedded within the gravel fill to allow
for air circulation.
2.9.3
Refrigeration Equipment
Refrigeration equipment for cold storage facilities shall be as specified
under Section 15652A COLD STORAGE REFRIGERATION SYSTEMS.
2.10
WATER FILTER
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NOTE: Water filters will be used only where water
taste and quality are poor. Designer will indicate
the location of the water filters on the drawings.
Water filters will be located in an accessible
location. Water filters may be piped in parallel to
obtain greater capacity.
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A cartridge-type water filter shall be provided on water supply lines to
equipment as shown.
2.10.1
Cartridge Filter
The filter shall remove dirt and off-taste items, such as chlorine and
other medicined items. In addition, it shall reduce lime-scale problems
when required by water conditions. The filter shall consist of a stainless
steel pressure vessel, which includes shell top, bracket check valve,
fittings and accessories, and plastic disposable cartridge. The cartridge
shall be of the precoat filtration type in which a coating of particles is
applied on a suitable fabric support. The filter shall contain not less
than 90 percent activated carbon and 10 percent inert binders. The filter
shall remove particles 2 microns and larger. The filter shall be installed
with [an inlet valve] [a three-position valve header], activation faucet,
and by-pass valve which will be normally closed. In addition, an
indication gauge shall be provided to indicate when cartridge requires
replacement.
2.10.2
Working Pressure and Flow Rate
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NOTE: Designer will select filter size with flow
rate to accommodate equipment being filtered.
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The filter shall be installed as recommended by the manufacturer and be
suitable for 860 kPa 125 psig maximum working pressure at 38 degrees C 100
degrees F water inlet temperature. Each filter shall have a nominal flow
rate of [11.34] [5.67] [3.78] L/minute [180] [90] [60] gph. An additional
replacement cartridge shall be provided for each filter.
SECTION 11400A
Page 35
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