An air conditioner with a thermostatic expansion valve is operating with a condenser saturation temperature of 110°F and a liquid line temperature of 85°F. The factory specified subcooling for the current operating condition is 10°F. After checking the condenser coil and airflow, the technician should:
A) Leave the charge alone because it is cooling even better than factory specifications.
B) Add charge because the system is undercharged.
C) Recover charge because the system is overcharged.
D) Move some of the charge from the low side of the system to the high side of the system to balance the charge.
C
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When might an invoice prepared by the service consultant be scrutinized?
A. State Attorney General inquiry B. Insurance claim caused by the service facility actions C. Court complaint D. All of the above
Lighting contactors are rated for _____.
a. high horsepower loads b. low inrush currents and high voltages c. low inrush currents and low voltages d. high inrush currents
A refrigerant blend with a glide of 2°F or less would be considered:
A) A low glide blend. B) A high glide blend. C) A compound. D) An azeotrope.
Cross-section leveling determines the intermediate elevations of several points _____
a. perpendicular to the center line b. equally spaced along the center line c. parallel to the center line d. above and below the center line