Heat Pump ESCO Questions And Answers Graded A+.
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 an - correct answer. Reversing valve
What is the difference between "demand defrost" and "timed def...
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 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. Two outdoor coils with each one
incorporating a dual stage compressor.
, Room thermostats for heat pumps should be installed; - correct answer. 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; - correct answer. Emergency heat mode.
Start up with a night set back digital thermostat requires the technician to always; -
correct answer. Teach the customer how to program the thermostat.
The heat pump defrost board can be manipulated by the technician to; - correct answer.
Simulate the defrost cycle.
The air-to-air heat pump outdoor unit is most efficient if located; - correct answer. In a
moderate climate zone.
Which of the following are innovations that may be found on new high efficiency units? -
correct answer. ECM fan motors.
How may a lockout (impedance) relay be reset? - correct answer. Simply disconnect
power to the unit momentarily.
The temperature difference between the 1st and 2nd bulbs for heating on a heat pump
thermostat is; - correct answer. Approximately 2*F
SEER is calculated by; - correct answer. Dividing the Btu's removed by the watts
consumed during the cooling season.
If the indoor fan is operated at an excessive speed in the cooling mode; - correct
answer. The system will not properly remove the humidity from the conditioned space.
The most preferred method of charging any system in the field is; - correct answer. By
weight.
What is the industry standard for deep vacuum? - correct answer. Maintain 500
microns for 15 minutes.
Good service practice for installation of a reversing valve includes; - correct answer.
Use heat paste and wet rags while brazing in the new valve.
Off-cycle crankcase heat is provide by; - correct answer. A small amount of current is
passed through the start capacitor to start the heat winding.
You are checking for proper airflow in CFM on a three ton heat pump system. The
system has one return grill measuring 24"X24", which has a net free area of 3.4 square
feet. You measure air velocity and calculate an average of 400 FPM. From this
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