Heat pumps: unit 43 – Flashcards
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How does a heat pump resemble a refrigeration system?
answer
It has all the same components except a reverse valve
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Name three common sources of heat in a heat pump.
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Air, water, and geothermal.
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What large line connects the indoor unit to the outdoor unit?
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The gas line
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Why is the indoor unit not called an evaporator?
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Cause it can be both an evaporator and a condenser.
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When is the outdoor unit called the evaporator?
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In the cooling season
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The indoor coil is called the condenser during what season?
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The cooling season
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Why is it important to have drainage for the outdoor unit?
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Cause the ice build up will act as an insulator and reduce the heat transfer processes thus lowering the COP.
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Which metering device is most effective in next pumps?
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The TXV
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Where is the only permanent suction line in a heat pump?
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The line going to the compressor
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What type of drier may be used in the liquid line of a heat pump?
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Biflow filter drier
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Where must the suction line drier be placed after a motor burnout?
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In the true suction line.
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What controls the heat pump to determine whether it is in the heating mode or the cooling mode?
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The thermostat
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Can a heat pump switch modes automatically?
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Yes
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What must be done when the outside coil has major frost and ice build up on it?
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Turn the defrost mode on
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All heat pumps are practical in the U.S.
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False, because there's different kinds of heat pumps
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Why are scroll compressors more efficient than reciprocating compressors?
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Because they don't require crankcase heat due to them not being sensitive to liquid.
