Identify the pressure corresponding to 32F for R-123 - answer20 inches of Hg vacuum
Refrigerant is added to a centrifugal machine through the - answerevaporator charging valve
What precaution should be taken prior to recovering refrigerant from a chiller suspected of having tube leaks? - answ...
EPA SECTION 608 TYPE III (2024 revision)
Identify the pressure corresponding to 32F for R-123 - answer20 inches of Hg vacuum
Refrigerant is added to a centrifugal machine through the - answerevaporator charging valve
What precaution should be taken prior to recovering refrigerant from a chiller suspected of having tube
leaks? - answerdrain the water sides of the evaporator and condenser
Where does refrigerant go after it leaves the purge unit of a low pressure centrifugal system - answerthe
evaporator
A charged low pressure refrigeration system can be efficiently leak checked by - answerraising system
pressure by heating with circulated hot water or heating blankets
To determine how much vapor to charge into an evacuated chiller, you should charge with vapor until -
answerthe system pressure corresponds to a refrigerant saturation temperature of 36F
After recovering the liquid refrigerant you must - answerrecover the vapor refrigerant
A rupture disc on a recovery vessel for low pressure refrigerants relieves at - answer15 psig
The discharge from a rupture disc should be piped - answeroutdoors for venting
According to the EPA, there is approximately ________ refrigerant vapor left in an average 350 ton R-11
chiller at 0 psig pressure once all the R-11 liquid has been removed? - answer100 lbs
When there is excessive moisture collecting in the purge unit of a low pressure refrigeration system, this
indicates that the - answercondenser or chiller barrel tubes are leaking
R-11 at a pressure of 17 inches Hg vacuum has a saturation temperature of - answer35f
The maximum test pressure for leak testing a low pressure centrifugal is - answer10 psig
R-11 at 14.7 PSIA will boil at about - answer74.5F
According to ASHRAE Guideline 3-1996, if the pressure in a system rises from 1 mm Hg to a level above
_______ during a standing vacuum test, the system should be checked for leaks. - answer2.5 mm Hg
If you suspect a leak in the water box of a chiller, you should place the leak detector probe
_____________, and sniff for refrigerants. - answerthrough a drain valve
The purge unit takes its suction from the - answertop of the condenser
When installing more than one, pressure relief valves must be installed;
A.) In series with each other.
, B.) In parallel with each other.
C.) In the system's suction line.
D.) On top of compressor head. - answerc.) In parallel with each other
In a low-pressure chiller, air and other non-condensables collect at the;
A.) Bottom of the compressor
B.) Top section of the condenser
C.) Bottom fo the evaporator
D.) Header before the metering device. - answerb.) Top section of the condenser
Because a low-pressure system operates below atmospheric pressure (in a vacuum),
A.) The system is unlikely to have air and moisture enter the system.
B.) Leaks in gaskets or fittings will cause air and moisture to enter the system.
C.) Leaks in the gaskets or fittings will cause substantial refrigerant leaks.
D.) Leaks in the gaskets or fittings will cause oil clogging at the condenser. - answerb.) Leaks in gaskets or
fittings will cause air and moisture to enter the system.
Where is the purge unit located in a low-pressure system?
A.) The top of the condenser
B.) In the lowest location.
C.) Above the shell.
D.) Before the oil operator. - answera.) The top of the condenser
When LEAK TESTING a low-pressure chiller, the maximum pressure to use is;
A.) 5 psig
B.) 10 psig
C.) 15 psig
D.) 20 psig - answerb.) 10 psig
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