HVAC Excellence HEAT PUMP - Week 2, Days 4, 5, and 6 COMBINED

HSPF measures heat pump efficiency in heating mode, and SEER measures heat pump efficiency in cooling mode.

The temperature split across the indoor coil of a heat pump in heat mode is 38⁰F and 29⁰F in cooling mode. You should

You measure an air velocity of 400 FPM for airflow on a 3 ton heat pump. The area of the duct opening is 3.4 sq. feet.

This defrost board is set for every 60 minutes. What type of defrost board is employed on this heat pump?

Initiation means __________.

DTC stands for ______________.

Where is the LLP physically located in the heat pump?

What is this a picture of?

What is the recommended CFM across the evaporator coil of a heat pump?

Discharge Pressure Absolute (PSIA) ÷ Suction Pressure Absolute (PSIA) is the formula for ________________.

What is the name of this formula?

On a water source heat pump, the heat mode water regulating valve must be ___________

TH-1 stands for ___________.

What is in this photo?

The maximum duration for defrost on a heat pump is 3 minutes.

Off-cycle crankcase heat is provided by a small current passed through a start capacitor to start the heat winding.

How would you describe this flow of water?

RVR stands for ____________.

In a heat pump, the liquid line is a bi-flow liquid line.

LLP stands for _____________.

What control operates the 1st stage of secondary heat?

The DTC motor and cam will close the DTC N.O. contacts momentarily (approx. 5 sec.) How is the DFR kept energized?

The name for this part that sticks out that you can adjust clockwise or counter-clockwise is called a _____________.

What type of defrost is employed on this heat pump?

When the spring is all the way at the top of the valve, _______________.

A liquid line pressure switch is also a _____________.

If manufacturer specifications are not available, a good way to calculate cubic feet per minute through a coil is to ___

How is defrost terminated in the heat pump system?

What does HSPF stand for?

An R410A heat pump operating in the heating mode has a suction pressure 50 PSIG and a head pressure of 285 PSIG has

What is in this photo?

DFR stands for ____________.

Which type of heat pump does NOT require a defrost cycle?

CR stands for _____________.

Which component is responsible for energizing auxiliary heat during the defrost cycle?

What is in this photo?

In this photo, the stem was rotated counter-clockwise. This ______________.

When the unit switches to the heat mode, describe the sequence of events that take place.

Heat pump mode efficiency is rated in ______________.

What is the industry standard for maximum duration for defrost?

Termination means __________.

What is this a picture of?

The defrost relay switch is responsible for which of the following?

Bi-flow means it flows in ______ directions.