HVAC NATE Heat Pump questions and answers 100% verified. On vvan vR-22 vsystem, vline vdiameters vand vlengths vare vtypically vspecified vfor va vvapor vpressure vdrop vthat vdoes vnot vexceed vwhat? v- v vcorrect vanswer. v v v6-7PSI vor v6F What vis vthe vprimary vpurpose vof vusing vflux vwhen vsoldering vcopper vor vbrass vparts? v- v vcorrect vanswer. v v vPrevent vOxidation The vwater vthat vresults vfrom va vdefrost vcycle vof van vair vto vair vheat vpump(runoff) vmust? v- v vcorrect vanswer. v v vDrain voff vand vaway vfrom vthe voutdoor vcoil. Why vmust vthe vrunoff vbe vdrained voff vand vaway vfrom vthe voutdoor vcoil? v- v vcorrect vanswer. v v vExcessive vice vcan vbuild vup von vthe vbottom vof vthe vcoil vand vcan vreduce vcapacity. What vis vthe vcomponent vthat vreduces vsound vtransmission vand vprevents vwater vleaks vof va vpackage vheat vpump vinstalled von va vroof? v- v vcorrect vanswer. v v vCurb vGasket Why vdo vyou vneed vto vadd va vcontrol vfor va vheat vpump vindoor vcoil vthat vis vinstalled von va vfossil vfuel vfurnace? v- v vcorrect vanswer. v v vSo vthe vheat vpump vand vfurnace vdo vnot voperate vat vthe vsame vtime vin vnormal vheating. What vhappens vwhen vyou venergize va vhermetic vrefrigeration vcompressor vand vthe vsystem vis vin va vdeep vvacuum? v- v vcorrect vanswer. v v vMotor vwindings vcould vbecome vdamaged. What vneeds vto vhappen vin vorder vto vconsider van vevacuation vto vbe vcomplete? v- v vcorrect vanswer. v v vSystem vshould vbe vevacuated vto va vvacuum vof v500 vMicrons vor vbelow. A vsystem vis vsupplied vfrom vthe vfactory vwith vcharge vfor va v15 vfoot vline vset. vThe vdata vplate vshows vthe vrequired vsystem vcharge vto vbe v5 vpounds v10 vounces. vThe vline vset vuses va v3/8 vinch vliquid vline vand vis v25 vfeet vlong. vThe vmanufacturer's vinstruction vsheet vspecifies v0.6 vounces vof vrefrigerant vto vbe vadded vfor veach vadded vfoot vof vrefrigerant vline vlength. vHow vmuch vrefrigerant vis vneeded vto vcompletely vcharge vthe vsystem? v- v vcorrect vanswer. v v v6lbs Where vare vdrive vslips vtypically vinstalled? v- v vcorrect vanswer. v v vOn vthe vshorter vsides vof vrectangular vduct. What vis va vnecessary vcheck vto vproperly vset va vheat vanticipator? v- v vcorrect vanswer. v v vHeating vcontrol vcircuit vamperage v draw. A vheat vpump voperating vin vnormal vice vfree vconditions vmaintains va vcertain vtemperature vdifference vbetween vthe voutdoor vcoil vtemperature vand vthe vsurrounding voutdoor vambient. vWhat vis vthis vtemperature vreferred vto vas? v- v vcorrect vanswer. v v vCoil vTD. What vis vthe vsmallest vrefrigerant vleak vthat van velectronic vleak vdetector vshould vbe vcapable vof vsensing? v- v vcorrect vanswer. v v v.o5oz vper vyear. When vchecking vthe vpressures vin van voperating vsystem vwith va vmanifold vgauge vset, vwill vrefrigerant voil vin va vhose vwill vhave van veffect von vthe vgauge? v- v vcorrect vanswer. v v vNo What vis vthe vabsolute vpressure vat vsea vlevel vif va vgauge vpressure vis v35 vpsig? v- v vcorrect vanswer. v v v49.7psia 100,000 vBTUH voutput vfurnace. Return vair vtemp vis v65F. Supply vair vis v135F. What vis vthe vCFM? v- v vcorrect vanswer. v v v1323CFM What vis vthe vbest vmethod vof vrepair vwhen va vresidential vsupply vdiffuser vis vnoisy vbecause vof va vloose vvane? v- v vcorrect vanswer. v v vReplace vthe vdiffuser. When vperforming vpreventive vmaintenance von va vheat vpump vwhat vshould vthe vtechnician vcheck vand vwhy? v- v vcorrect vanswer. v v vOutdoor vfan. vTo vbe vcertain vit vruns vfreely vwith vno vbinding. What vis vthe veffect vof v170 vvolts vsupplied vto va v208/230 vvolt vcompressor? v- v vcorrect vanswer. v v vWould vcause vthe vcurrent vto vincrease vand vthe vmotor vmay vtrip von voverload. On va vservice vcall vfor va vcooling vproblem vwith va vheat vpump, vyour vinspections vfind va vliquid vline vthat vhas vcondensation von vit. vWhat vis vmost vlikely vto vcause vthis? v- v vcorrect vanswer. v v vRestriction vin vthe vliquid vline. What vis va vreason vfor vcool vair vcomplaints vwhen va vheat vpump vis voperat ing vin vthe vheating vcycle? v- v vcorrect vanswer. v v vExcessive vsupply vair vvelocities. The vfollowing vmeasurements vare vrecorded von van voperating vheat vpump vsystem. vThe vheat vpump vis voperating vwith vthe vcompressor vonly vwith vno vauxiliary vheat: • vHeat vpump vonly vsupply vair vtemperature v92°F • vHeat vpump vonly vreturn vair vtemperature v70°F • vOutdoor vtemperature v54°F • vSupply vair vtemp. v/auxiliary vheat vON v115°F
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