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0 0 RECEIVED <br />MAY 18 2015 <br />85. Before using a recovery unit you should always check what? ENVIRONMENTAL <br />- tJ F4!rIJ r1FPA0T!1AFNT <br />86. Although recovering refrigerant in the vapor phase will minimize the loss of oil, recovering as much as <br />possible in the liquid phase can reduce what? <br />87. After recovery, refiIigerant may be returned to the appliance from which it was removed or to what? <br />88. Refrigerant Recovery and/or Recycling equipment manufactured after November 15, 1993, must be certified <br />and labeled by whom? <br />89. Under EPA regulations, a "major repair" means what? <br />90. What are the components of the vapor/compression refrigeration system? <br />91. What will remove the moisture from the refrigerant in a system? <br />92. When recovering refrigerant from a system that experienced a compressor burn -out, watch for signs of <br />what? <br />93. When evacuating a vapor compression system, the vacuum pump should be capable of pulling what level? <br />94. The source of most non-condensables is what? <br />95. Where there is a risk of freezing, liquid charging of an R-12 refrigeration system should begin with what? <br />96. What refrigerants are categorized as A-1? <br />97. Never energize what if the discharge service valve is closed? <br />98. Technicians maintaining, servicing, repairing or disposing of low-pressure appliances must be certified as <br />what? <br />99. Because a low-pressure system operates below atmospheric pressure (in a vacuum), leaks in the gaskets or <br />fittings will cause what to enter the system? <br />100. The most efficient method of leak checking a charged low-pressure refrigeration unit is to pressurize the <br />system by what? <br />101. When pressurizing a system, do not exceed what psig? <br />102. Systems with open drive compressors are prone to leaks where? <br />103. A recovery unit's high pressure cut-out is set for what psig when evacuating the refrigerant from a low- <br />pressure chiller? <br />Providing outstanding, nationwide refrigerant recovery for the HVAC/Refrigeration/Demolition/Marine industries. <br />Local On -Site Service — An Independently Owned & Operated Franchise Company <br />