Heat pump Study guides, Class notes & Summaries

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 - Reversing valve A customer complains that their heat pump systems blows cool air periodically during the heat mode. This could be caused by; - A faulty defrost relay (does not energized the aux. Heat during the defrost mode.) When a heat pump is in the heating mode, which can cause frost accumulation on the outdoor coil when the ambient temperature...

What is the main difference between a heat pump and a fossil fuel furnace? - Heat pumps move heat instead of creating it How can you lower the temperature at which evaporation takes place? - Reduce the pressure on the low side of the system During the cooling season, the heat pump operates as an? - Air Conditioner. How can an air source heat pump heat when the outdoor temperature is cold? - All molecules contain some heat until they reach absolute 0(-460F.) How does liquid turn ba...

Charging a heat pump with refrigerant is best accomplished in the _______ mode. - B: Cooling mode Which of the following can prevent the reversing valve from changing positions? A: Low refrigerant charge B: Overcharge of refrigerant C: Air in the system D: Low indoor airflow due to a dirty air filter - A: Low refrigerant charge The supply air temperature on a normally operating heat pump is: A: Lower than that of a gas heating system B: Higher than that of a gas h...

Faulty defrost delay does not energize the auxiliary heat during defrost mode - Customer complains that the heat pump system blows cool air periodically during the heating mode this could be caused by The outdoor coil is colder than the ambient air - When the heat pump is in the heating mode what can cause frost accumulation on the outdoor coil when ambient temperature is 45°F Anytime there is a call for heating or cooling - The indoor fan on a heat pump system operates Time and tem...

It is not always a good idea to immediately connect a standard gauge manifold set and hoses to a heat pump when a problem is suspected because; - the charge is critical, sometimes plus/minus 1/2 oz. Refrigerant Which component is responsible for changing the direction of the flow of refrigerant? - Reversing valve Some heat pump system use a ___________as a metering device - fixed orifice The slide valve and piston in the reversing valve is actuated by pressure directed through the; -...

1. 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); - C: reversing valve. 2. What is the difference between "demand defrost" and "timed defrost?" - D: Demand defrost happens only when needed and timed defrost is based on time whether it is needed or not. 3. The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called the; - C: outdoor ambient the...

This component of a heat pump system holds some of the charge of the system out of circulation during the heating cycle. - Charge Compensator What is the temperature in degrees Fahrenheit of R-22 at a pressure of 317 psig? - 135 When a vapor refrigerant is at its saturation point, adding more heat will cause the refrigerant to condense. - False The Charge Compensator stores refrigerant in the heating mode. It will be empty in the cooling mode. - True 24 in x 20 in Return Grille ...

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Heat Pump ESCO Accurate 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 an - ANSWER Reversing valve What is the difference between "demand defrost" and "timed defrost"? - 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; - ANSWER Outdoor amb...

HEAT PUMP ESCO (SPANISH).A TEST WITH ALL ANSWERS