BASIC HVAC THEORY
36,000BTU/HR
WHAT IS 3 TONS
HOW MANY OUNCES IN A POUND
WHAT IS 16 OUNCES
WHAT TYPE OF PUMP IS AN A/C COMPRESSOR?
VAPOR PUMP
WHAT IS THE PURPOSE OF THE CONDENSER? (TWO ANSWERS).
TO REJECT HEAT FROM THE SYSTEM AND TO CHANGE STATE FROM VAPOR TO LIQUID.
WHAT IS THE PURPOSE OF THE METERING DEVICE?
TO REGULATE REFRIGERANT ENTERING THE EVAPORATOR
WHAT IS THE PURPOSE OF THE EVAPORATOR? (TWO ANSWERS)
TO ABSORB HEAT FROM THE ROOM/BOX AND TO CHANGE STATES FROM LIQUID TO VAPOR.
WHY IS PURGING THE HOSES SO IMPORTANT TO RECOVERY?
TO REMOVING ANY TRAPPED AIR/MOISTURE IN THE LINES
THE NITROGEN SHOULD BE.
REMOVED FROM THE SYSTEM BEFORE VACUUMING THE SYSTEM.
WHY IS PURGING THE SERVICE HOSE FROM THE CHARGE TANK SO IMPORTANT?
TO REMOVE ANY TRAPPED AIR/MOISTURE IN THE SERVICE HOSE.
WHAT IS HIGH-TEMPERATURE COOLING?
WHAT IS COMFORT COOLING?
IT IS A DEVICE LOCATED ON THE HIGH-PRESSURE SIDE OF THE SYSTEM BETWEEN THE CONDENSER AND THE METERING DEVICE
WHAT IS THE RECEIVER?
WHAT DOES SERVICABLE HERMTIC COMPRESSOR MEAN?
THE COMPRESSOR IS BOLTED TOGETHER AND CAN BE TORN APART FOR SERVICE.
THE NORMAL TEMPERATURE OF THE CONDENSER
wHAT IS 20*F TO 30*F HIGHER THAN THE OUTDOOR AMBIENT AIR TEMPERATURE?
IT IS A DEVICE LOCATED ON THE HIGH-PRESSURE SIDE OF THE SYSTEM BETWEEN THE CONDENSER AND THE METERING DEVICE.
WHAT IS THE LIQUID LINE FILTER DRIER
THE NORMAL TEMPERATURE OF THE EVAPORATOR.
WHAT IS 40*F
WHY IS THE AUXILLARY HOSE ATTACHED TO THE LOW SIDE OF THE RECOVERY TANK
FOR A FASTER RECOVERY
TOOLS ARE REQUIRED TO PULL A VACUUM ON THE SYSTEM.
WHAT ARE THE MANIFOLD GAUGES, MICRON GAUGE, AND THE VACUUM PUMP/
THE PURPOSE OF THE SCALE IS.
WHAT IS TO KNOW HOW MUCH LIQUID/VAPOR REFRIGERANT IS BEING ADDED TO THE SYSTEM?
THE COLDEST PART OF THE HVAC SYSTEM.
WHAT IS THE EVAPORATOR INLET?
IT IS A DEVICE LOCATED ON THE LOW-PRESSURE SIDE OF THE SYSTEM BETWEEN THE EVAPORATOR AND THE COMPRESSOR.
WHAT IS THE ACCUMULATOR?
THIS COMPRESSOR IS A TALL COMPRESSOR THAT IS FOUND IN MOST RESIDENTIAL A/C SYSTEMS
WHAT IS A SCROLL COMPRESSOR?
THE LOCATION OF THE RESIDENTIAL CONDENSER IS.
WHAT IS OUTSIDE?
THIS DEVICE HAS NO MOVING PARTS
WHAT IS A CAPILLARY TUBE METERING DEVICE
THE EVAPORATOR'S NICKNAME IS.
WHAT IS A HEAT SPONGE?
FLIPPING THE TANK BEFORE A RECOVERY DOES WHAT?
ALLOWS A FASTER RECOVERY.
BEFORE PULLING A VACUUM. ONE CHECK SHOULD BE DONE EVERY TIME A VACUUM IS USED.
WHAT IS CHECKING THE OIL LEVEL?
HOW TO CHARGE IN LIQUID WITH A VIRGIN TANK
BY FLIPPING THE TANK
NORMAL ATMOSPHERIC PRESSURE AT SEA LEVEL.
WHAT IS 14.696 PSI OR 29.92" HG?
WHAT DOES THE TERM "HERMETICALLY SEALED" MEANS?
WHAT IS WELDED SHUT?
THIS COMPRESSOR IS A SMALL, ROUND COMPRESSOR THAT IS FOUND IN MOST RESIDENTIAL REFRIGERATORS.
WHAT IS A RECIPROCATING COMPRESSOR?
WHAT TEMPERATURE READING DO WE GET FROM THE CONDENSER
SUBCOOL READING
THIS METERING DEVICE MAINTAINS A CONSTANT SUPERHEAT.
WHAT IS TXV?
WHAT TEMPERATURE READING DO WE GET FROM THE EVAPORATOR?
WHAT IS THE SUPERHEAT READING?
WHAT FEDERAL ACT REGULATES THE FINE AND PENALTY, IF CAUGHT PURPOSELY RELEASING REFRIGERANT INTO THE ATMOSPHERE?
THE CLEAN AIR ACT.
PULLING THE SYSTEM TO 500 MICRONS MEANS.
WHAT THE HVAC INDUSTRY CONSIDERS A DEEP VACUUM?
HOW TO CHARGE IN LIQUID WITH A RECOVERY TANK
BY SETTING UP ON THE LIQUID/HIGH SIDE OF THE RECOVERY TANK
CHANGING STATES BUT NOT TEMPERATURE
WHAT IS LATENT HEAT (HIDDEN HEAT)?
IT HAS TWO FEATURES, IT ALLOWS THE TECH TO VIEW THE REFRIGERANT AND TO MONITOR THE MOISTURE IN THE SYSTEM.
WHAT IS THE SIGHT GLASS?
LIQUID REFRIGERANT ENTERING THE COMPRESSOR WILL CAUSE.
WHAT IS DAMAGE TO THE COMPRESSOR?
WHAT IS THE FORMULA FOR THE SUBCOOL READING?
SATURATE TEMP OF GUAGE TEMP MINUS LIQUID LINE TEMP
A TXV LOSES ITS BULB CHARGE.
WHAT IS THE CONDITION THAT WILL RAISE THE SUPERHEAT?
WHAT IS THE SUPERHEAT FORMULA?
VAPOR LINE TEMP MINUS SATURATED OR GUARGE TEMP.
WHY IS A FILTER DRIER ADDED TO THE RECOVERY MACHINE?
TO PROTECT THE RECOVERY COMPRESSOR AND INTERNAL COMPONENTS FROM DAMAGE DUE TO CONTAMINANTS AND MOISTURE.
WHAT IS THE FIRST INDICATION THERE IS EXCESSIVE MOISTURE WHILE PULLING A VACUUM?
THE MICRONS WITH FLUCTUATION.
THE LENGTH A UNIT SHOULD RUN BEFORE DOING A SUBCOOL READING IN THE FIELD.
WHAT IS 15 MINUTES?
WHERE DO YOU FIND THE TYPE AND AMOUNT OF REFRIGERANT USED FOR THE UNIT INVOLVED IN WITH A SERVICE CALL?
THE EVAPORATOR IS REPRESENTED ON WHICH GUAGE?
LOW SIDE (BLUE).
THE COMPRESSOR PUMPS LOW PRESSURE/LOW TEMP VAPOR INTO HIGH PRESSURE/HIGH TEMP SUPERHEATED VAPOR.
WHAT IS THE COMPRESSOR'S JOB?
WHAT ARE THE TEMPERATURE PREFERENCES FOR SUBCOOLING?
10*F TO 12*F
WHAT IS THE DIFFERENCE BETWEEN THE "TEV" AND THE "TXV"?
ABSOLUTELY NOTHING. THE ACRONYM FOR TEV IS THERMOSTATIC EXPANSION VALVE. THE ACRONYM FOR TXV IS THE SAME.
WHAT ARE THE TEMPERATURE PREFERENCES FOR SUPERHEAT?
8*F TO 12*F
WHAT IS THE FINE AND POTENTIAL PENALTY FOR PURPOSELY RELEASING REFRIGERANT INTO THE ATMOSPHERE?
$60,000 PER DAY AND MAY INCLUDE PROSECUTION AND IMPRISONMENT UP TO 5-15 YEARS IN FEDERAL PRISON.
THE FIRST INDICATION OF HAVING A LEAK AFTER PULLING A VACUUM.
THE MICRONS WILL EITHER RISE SLOWLY OR FAST, DEPENDING ON THE SIZE OF THE LEAK (2000-50000 MICRONS).
ADDING 80% OF REFRIGERANT INTO THE HIGH-SIDE OF THE SYSTEM IS CALLED. ADDING THE 20% LEFT INTO THE LOW-SIDE WHEN THE UNIT IS RUNNING IS CALLED.
WHAT IS DUMPING AND METERING?
DEFINITION OF REFRIGERATION.
WHAT IS TRANSFERRING UNWANTED HEAT TO A PLACE WHERE IT HAS LITTLE TO NO EFFECT?
THE CONDENSER IS REPRESENTED ON WHICH GUAGE
HIGH-SIDE (RED)
THE NICKNAME OF THE COMPRESSOR.
WHAT IS THE HEART OF THE SYSTEM.
WHAT DOES THE SUBCOOL READING TELL US?
IT TELL US IF THE UNIT HAS A PROPER CHARGE.
AS REFRIGERANT LEAVES THE TXV, IT SPLITS INTO.
WHAT IS A LOW PRESSURE/LOW TEMPERATURE LIQUID AND VAPOR MIX (75% LIQUID 25% VAPOR)?
THE SUPERHEAT READING TELLS THE TECHNICIAN.
THE AMOUNT OF HEAT HAS BEEN ADDED TO THE REFRIGERANT VAPOR ABOVE ITS BOILING POINT. WHICH CONFIRMS THAT ONLY VAPOR IS ENTERING THE COMPRESSOR.
WHAT AGENCY REQUIRES TECHNICIANS TO RECOVER ALL REFRIGERANT?
WHAT IS THE ENVIRONMENTAL PROTECTION AGENCY (EPA)
THE VACUUM CLEANS THE SYSTEM BY.
WHAT IS REMOVING MOISTURE FROM (DEHUMIDIFYING) THE SYSTEM?
THE BEST/MOST EFFICIENT WAY TO CHARGE A SYSTEM WITH REFRIGERANT IS.
WHAT IS A LIQUID CHARGE