Submit in accordance with Section 01781 OPERATION AND
MAINTENANCE DATA.
1.4
CORROSION PROTECTION TESTS
Comply with [ASTM A 123/A 123M] [ASTM A 653/A 653M] or protect the
equipment with a corrosion-inhibiting coating or paint system that has
proved capable of satisfactorily withstanding corrosion in accordance with
ASTM B 117. Test 125 hours for equipment installed indoors and 500 hours
for equipment installed outdoors or subjected to marine atmosphere. Each
specimen shall have a standard scratch as defined in ASTM D 1654.
1.4.1
Corrosion Criteria
Upon completion of exposure, coating or paint shall show no indication of
deterioration or loss of adhesion, indication of rust, or corrosion
extending further than 3 mm 1/8 inch on either side of original scratch.
1.4.2
Thickness of Coating
Thickness of coating or paint system on the equipment shall be identical to
that on the test specimens with respect to materials, conditions of
application, and dry film thickness.
1.5
LABORATORY TEST
Conduct the test with entering air at 35 degrees C, dry-bulb, plus or minus
2.78 degreees C and a spread between wet-bulb and dry-bulb temperature of
minus 4 degrees C plus or minus 3 degrees C. Show the capacity in liter
per second (L/s) and efficiency. Meet the following requirements:
Evaporative Cooler
Minimum Efficiency, Percent
Single Stage
80
Two Stage
Indirect Section, 60; Direct Section, 90
T1-T2
Efficiency =__________ x 100 percent
T1-Tw
where:
T1 is the entering dry-bulb temperature in degrees C.
T2 is the leaving dry-bulb temperature in degrees C.
Tw is the entering wet-bulb temperature in degrees C.
Conduct the test with entering air at 95 degrees F, dry-bulb, plus or minus
5 degrees F and a spread between wet-bulb and dry-bulb temperature of 25
degrees F plus or minus 5 degrees F. Show the capacity in cubic feet per
minute (cfm) and efficiency. Meet the following requirements:
Evaporative Cooler
Minimum Efficiency, Percent
Single Stage
80
Two Stage
Indirect Section, 60; Direct Section, 90
T1-T2
Efficiency =__________ x 100 percent
T1-Tw
SECTION 15721N
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