OO-A-373D
Outdoor components made of ferrous and nonferrous metals located in marine atmosphere should withstand 125 hours and in severe marine atmosphere 500 hours of salt per ASTM B 117
(see 3.12.1 and 3.12.2).
6.1.8 For military acquisitions. All units rated less than 65,000 Btu/hr (19 050 W) with air cooled condenser and three phase power unit input, the SEER applies and the minimum should be not less than 9.7. Other units within the scope of this specification, the EER applies and the minimum EER should be not less than 10.0.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a. Title, number, and date of this specification.
b. Type, style, class, arrangement, and mounting of the units required (see 1.2, 3.4.1.1,
3.4.1.2, and 3.4.1.3).
c. Cooling capacity required in Btu/hr, kilowatts (kW) and operating conditions (outside wet- and dry-bulb temperatures, inside wet - and dry-bulb temperatures and condenser water entering and leaving temperatures, where applicable) and air quantity for other than standard ratings (see 1.2, 3.5.1.5, 3.11.1 and 6.1.6).
d. Where type SP-A units are to be located (see 3.4.1.1).
e. Where type SP-W units are to be located if other than as specified (see 3.4.1.2).
f. Where type SPY-A units are to be located if other than as specified (see 3.4.1.3).
g. Method of heating required for type SPY-A units and heating capacity in Btu/hr (W).
Specify required steam pressure, gas pressure or water temperature (see 3.4.1.3, 3.8.6, and 6.1.3).
h. Design conditions for loads over 135,000 Btu/hr (39 565 W) (see 3.5.1.5).
i. When interior-located air conditioners need not be suitable for exposed installation in an office space. Mechanical features of the enclosure design required for mounting
(see 3.8.1.1).
i. When provisions for introducing outside air to return air-side is required (see 3.8.1.3). J. When roof mounted units shall be provided with matching roof mounting frames
(see 3.8.1.4).
k. Type of compressor, if other than as specified (see 3.8.2).
l. Air cooled condenser material, if different (see 3.8.3.1 and 6.1.7).
m. When units 135,000 Btu/hr (39 565 W) and over shall be provided with not less than
10 F (- 12 C) liquid subcooling (see 3.8.3.1 and 3.8.3.2).
n. Water-cooled condenser type and material, if other than as specified (see 3.8.3.2).
o. Specify the quality of water available for water-cooled condensers in terms of hardness, total dissolved solids and pH (see 3.8.3.2).
p. Cooling coil construction if other than as specified (see 3.8.5).
q. Static pressure against which condenser fan must operate for air conditioners requiring duct connections to supply cooling air to the condenser (see 3.8.8.1).
r. When a filter drier is required (see 3.8.9).
s. When air filters are other than as specified (see 3.8.10). t. When crankcase heaters are required (see 3.8.11).
u. Type of refrigerant, if other than as specified (see 3.9.1).
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