OO-A-373D
6.5 Reduced voltage starters. Reduced voltage starters should be specified when critical voltage- regulation problems are anticipated because of such factors as inadequate power supply, poor distribution facilities, and presence of electrical or electronic equipment sensitive to voltage fluctuation. In general, the voltage dip should be not greater than 4 percent.
6.6 Sensible cooling effect. The sensible cooling effect in Btu/hr (W) is the difference between the total cooling effect and the dehumidifying effect. The dehumidifying effect in Btu/hr (W) should be computed as the product of 1.060 and the difference in moisture content, expressed in pounds (kilogram) per hour, between the entering air and that of the leaving air.
6.7 Refrigerant tubing, pipe, and fittings. The attention of the contracting officer is directed to the fact that substitute refrigerant tubing, pipe, and fittings may not be available at the time of invitation for bids. He should, therefore, assure himself of such availability prior to requesting bids from prospective contractors.
6.8 Standard lubricants. When requested by the contractor, the contracting officer should furnish a list of standard military lubricants applicable to the equipment covered by this specification. Standard military lubricants are listed in the DoD section of the Federal Supply Catalog
C9100-IL.
6.9 Definitions.
a. Compressors, hermetically sealed: A hermetically sealed compressor shall consist of a compressor and motor enclosed in a welded or brazed shell and connected within a refrigerant circuit wherein all refrigerant liquid-or gas-containing parts shall be permanently sealed to prevent the circuit from being opened without cutting or melting (see 3.8.2).
b. Compressors semihermetically sealed: A semihermetically sealed circuit shall consist of a compressor and motor enclosed in a gas-tight shell and connected within a refrigerant circuit repaired. Sealed systems shall be provided with a refrigerant-charging valve of suction and discharge service valves (see 3.8.2).
c. EER: A ratio calculated by dividing the cooling capacity to Btu/hr (W) by the power input in watts at any given set of rating conditions, expressed in Btu/hr per watt (Btu/hr/watt) (see 3.11.3).
d. SEER: SEER means the total cooling of a central in Btus (W) during its normal usage period for cooling (not greater than 12 months) divided by the total electric energy input in watt-hours during the same period, as determined in appendices A or B of
ARI Standard 210/240 and ASHRAE Standard 116, methods of Testing for Seasonal
Efficiency of Unitary Air Conditioners and Heat Pumps (see 3.11.3).
e. Temperature, application rating: Other than standard rating temperatures.
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