HVAC Excellence - Heat Pump - Weeks 1 and 2 – COMBINED Best Questions and Answers_A+ Graded 100%

HVAC Excellence - Heat Pump - Weeks 1 and 2 – COMBINED Best Questions and Answers_A+ Graded 100% An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has a/an - CORRECT ANSWER-Reversing valve What is the difference between "demand defrost" and "timed defrost"? - CORRECT ANSWER-Demand defrost happens only when needed and timed defrost is based on time/temperature. The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called the _____________________. - CORRECT ANSWER-Outdoor ambient thermostat The outdoor temperature at which the heat pump provides the same amount of heat as the heat loss of the conditioned space without an auxiliary heat is known as the __________________. - CORRECT ANSWER-Initial balance point At what temperature is an outdoor ambient thermostat normally set? - CORRECT ANSWER-Slightly above the initial balance point. The outdoor coil is frozen solid on a "no heat" service call. The most likely reason is ________________________. - CORRECT ANSWER-The outdoor fan is inoperative. In order to determine a heat pumps' balance point, you must first calculate __________________________. - CORRECT ANSWER-The building's heat load. When a heat pump is used for heating and cooling, the system is sized by the ___________________________. - CORRECT ANSWER-Cooling load. A high efficiency heat pump system, designed to function from high to low ambient conditions below 10*F, may have _____________________. - CORRECT ANSWER-an auxiliary heat exchanger injected with ethylene glycol solution.