HVAC Final Study Guide part 1 Graded A+

This compressor uses pistons and valves to compressor refrigerant. - Answer-Reciprocating This compressor uses vanes to compress refrigerant. - Answer-Rotary compressor This compressor is the latest technology for compressor design - Answer-Scroll pump The manifold gauges should be in this position to pull a vacuum - Answer-They should all be open What is standing pressure used for? - Answer-To let you know that there is enough refrigerant to start the system What valve on a reciprocating compressor usually is damaged due to liquid slugging? - AnswerSuction Valve How do you figure low side running pressure for any refrigerant? - Answer--40 degrees from evaporator ambient temperature What compressor deals with liquid refrigerant by bypassing it into the discharge line? - Answer-Scroll Compressor Can a reciprocating compressor work if the motor is wired to run backwards? - Answer-Yes How many degrees do you add to the condenser ambient for R-410A when figuring high side running pressure? - Answer-C/A +25 degrees What are the 4 basic parts of any refrigeration system? - Answer-Evaporator, metering device, condenser, compressor Which refrigerant line will burn you if you touch it? - Answer-Discharge line Why is the Suction line always insulated? - Answer-To prevent anymore heat absorptionWhere should the suction line leave the evaporator? - Answer-At the bottom Where should the sprayed refrigerant enter the evaporator? - Answer-At the Top What line leaves at the bottom of the condenser? - Answer-Liquid line Where is a king valve located? - Answer-Next to the liquid receiver, outlet of the liquid receiver What is the purpose of a liquid line filter drier? - Answer-To remove contaminants What is the purpose of the suction line accumulator? - Answer-To prevent liquid from returning to the compressor What are the 3 processes that occur in the condenser? - Answer-De-superheat, condense, sub-cool What is the purpose of the condenser? - Answer-Remove Heat What is desuperheating? - Answer-Removing all superheat from refrigerant What is sub-cooling - Answer-Cooling a substance below its condensing temperature