HVAC Excellence - Heat Pump - Weeks 1 and 2 – COMBINED Questions and Answers 100% Pass

HVAC Excellence - Heat Pump - Weeks 1 and 2 – COMBINED Questions and Answers 100% Pass 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 - Reversing valve What is the difference between "demand defrost" and "timed defrost"? - 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 _____________________. - Outdoor ambient thermostat 2 100% Pass Guarantee Katelyn Whitman, All Rights 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 __________________. - Initial balance point At what temperature is an outdoor ambient thermostat normally set? - Slightly above the initial balance point. The outdoor coil is frozen solid on a "no heat" service call. The most likely reason is ________________________. - The outdoor fan is inoperative. In order to determine a heat pumps' balance point, you must first calculate __________________________. - The building's heat load. When a heat pump is used for heating and cooling, the system is sized by the ___________________________. - Cooling load. A high efficiency heat pump system, designed to function from high to low ambient conditions below 10*F, may have _____________________. - an auxiliary heat exchanger injected with ethylene glycol solution. 3 100% Pass Guarantee Katelyn Whitman, All Rights Room thermostats for heat pumps should be installed ___________________. - As near to the main return air grill as possible. When the heat pump compressor has malfunctioned, the customer has the option to switch the system into _______________________________. - Emergency heat mode. Start up with a night set back digital thermostat requires the technician to always __________________________. - Teach the customer how to program the thermostat. The heat pump defrost board can be manipulated by the technician to ___________________________. - Simulate the defrost cycle. The air-to-air heat pump outdoor unit is most efficient if located ____________________________. - In a moderate climate zo