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UNIT 89 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
89-1) List the associations that establish national standards for the HVACR industry.
ARI - Air Conditioning and Refrigeration Institute
89-2) What is the function of AHRI?
89-3) What does the UL specialize in?
89-4) List all major phases of system installation.
Equipment Placement
89-5) What factors must be considered in equipment placement?
89-6) Outline the correct brazing procedure for hard copper refrigeration piping?
89-7) What electrical rating on a unit data plate is useful for sizing the power wire for
the unit?
89-8) What electrical rating on the unit data plate is useful for sizing the circuit
breaker for the unit?
89-9) Use the information on the data plate in Figure 89-24 to determine the
minimum current rating for sizing the power wire to the unit.
89-10) Use the information on the data plate in Figure 89-24 to determine the
minimum current rating for the unit disconnect.
89-11) Use the information on the data plate in Figure 89-24 to determine the
89-12) What type of overcurrent protection is used with air conditioning equipment?
89-13) How should ductwork be sealed against air leaks?
89-14) How can vibrations and sound transmission from the unit to the ductwork be
minimized?
89-15) Use Figures 89-27 and Table 89-2 to determine the correct amount of
additional charge for a new split system with a 40 foot line set and a 3/8" liquid
line. The factory charge includes enough refrigerant for 15 feet of line.
89-16) What position are the unit installation valves in when the unit is shipped?
89-17) When installing a split system, what should be done prior to opening the
installation valves?
