2024 Heat Pump Training Day 2 Test

At what temperature is there 0 heat in any medium?

460° F

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32° F

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0° C

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-460° F

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What component is the major difference between an Air Conditioner and a Heat Pump?

The Accumulator

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The Reversing Valve

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The Condenser Coil Size

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Two Metering Devices

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Which coil is the condenser coil during Heat Pump heating?

Indoor Coil

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Outdoor Coil

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Circuit 1 Coil

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Circuit 2 Coil

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How do you size a Heat Pump?

Go back like-for-like, 3-ton out/3-ton in

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1/2 ton larger than what an a/c unit would be

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Performed Load Calculation

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Based on the heating load of the structure

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Based on the cooling load of the structure

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What information doesn’t the data tag on the unit contain?

The Model/Product and Serial Number

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The Voltage and Amperage of unit & components

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The type and amount of refrigerant

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Minimum Circuit Ampacity

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SEER & HSPF Ratings

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Subcooling

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What distance is required on the Service side of the unit.

6" Inches

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12" Inches

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18" Inches

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24" Inches

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Do you have to insulate both lines if you bury them in a PVC pipe?

Yes

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No

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If a house has foam insulation in the walls, should the lineset be covered with foam in the wall cavity?

Yes

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No

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What happens when you don’t braze with a nitrogen purge?

Refrigerant leaks

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Oxides on the outside of the copper

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Nothing, we've been doing it that way for years

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Oxides on the inside & outside of the copper

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How deep and how long should you pull and hold a vacuum for?

400 psi for 30 minutes

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500 microns for 30 minutes

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250 microns for 15 minutes

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29.9 inches of mercury and until I get back from lunch

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Where does the liquid line bi-flow drier need to be installed most of the time?

At the outdoor unit

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At the indoor unit

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In the liquid line

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At the indoor and outdoor to protect both metering devices

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Can a larger size CNPVT “N” coil be installed in the center of a smaller gas furnace?

Yes

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No

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Can a CNPHP “N” coil be installed in a horizontal left application for a heat pump with a transition?

Yes

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No

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Can a slab coil be installed in either direction on a heat pump?

Yes

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No

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Yes, but with some capacity loss

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Only in a right hand application

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Where do we find all the information required to select a unit based on capacity?

Unit Data Tag

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Installation Book

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Product Data Book

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Application & Service Manual

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Maintenance Manual

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Owners Manual

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Where can you find a list of the accessories for a unit?

Unit Data Tag

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Installation Book

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Product Data Book

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Application & Service Manual

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Maintenance Manual

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Owners Manual

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What is considered a Long Line Application for a Heat Pump below the Indoor unit?

35' vertical or 100' of Linear (actual) Length

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20' vertical or 80' Equivalent Total Length

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Product Data Book

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35' vertical or 80' Equivalent Total Length

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35' vertical or 80' of Linear (actual) Length

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Units are rated with how much line set length?

15' feet

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25' feet

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20' feet

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250' linear length (actual)

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200' Equivalent length

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If the refrigerant lines are sized correctly, can there be any capacity loss?

Yes

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No

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Depends on the liquid line size

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Depends on the vapor line size

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Do you always charge to the subcooling value on the data plate of the outdoor unit?

Yes

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No

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What are the AHRI Cooling standards for rating equipment in the cooling mode?

80°F db, 67°F wb indoor entering air temperature and 95°F db air entering outdoor unit.

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75°F db, 63°F wb indoor entering air temperature and 95°F db air entering outdoor unit.

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80°F db, 63°F wb indoor entering air temperature and 97°F db air entering outdoor unit.

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It is based on the data & parameters used in the AACA Manual J Load Calculation

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80°F db, 65°F wb indoor entering air temperature and 95°F db air entering outdoor unit.

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80°F db, 67°F wb indoor entering air temperature and 105°F db air entering outdoor unit.

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What is the maximum vertical lift you can have in the lineset is the heat pump is below the indoor unit?

20' feet

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35' feet

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Depends on the size of the unit

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250' feet equivalent length

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200' feet equivalent length

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80' feet

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Does the maximum lift length have an effect on the overall Total Equivalent Length if the Heat Pump is below the indoor unit?

Yes

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No

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What is the maximum +/- high voltage percentage allowed?

208/230

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197 vac

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253 vac

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5%

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10%

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What is the maximum outdoor operating air temperature for heating with the heat pump?

66° degrees

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-10° degrees

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55° degrees

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125° degrees

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How are Heat Pump and Air Conditioner Coils different?

Heat Pump Coils are bigger

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Heat Pump Coils feed refrigerant from the top of the coil

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Heat Pump Coils are specially coated for better heat transfer

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The number of coil rows, how the refrigerant circulates through the coil, and the fins based on the product design

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When adjusting subcooling do you add or remove refrigerant to lower the line temperature?

Add refrigerant

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Remove refrigerant

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Does the airflow chart on the Puron slide calculator work for R-22 refrigerant also?

Yes

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No

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In the heating mode, where is heat rejected from the refrigerant?

Compressor

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Reversing valve

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Condenser

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Evaporator

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Metering Device

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Accumulator

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Does the indoor TXV meter the refrigerant in the heating mode?

Yes

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No

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How many functions are there of the compressor?

1

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2

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3

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4

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Can you use Capillary Tube metering devices with heat pumps?

Yes

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No

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What state is the refrigerant in as it enters the indoor coil in the cooling mode?

Superheated Vapor

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Subcooled Liquid

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Superheated Liquid

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Subcooled Vapor

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What state is the refrigerant in as it enters the indoor coil in the heating mode?

Superheated Vapor

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Subcooled Liquid

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Superheated Liquid

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Subcooled Vapor

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What does the TXV control?

Air Temperature

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Head Pressure

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Capacity

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Suction Pressure

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Humidity

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Flow of liquid refrigerant

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Do you have to have a set of manifold gauges to troubleshoot a system?

Yes

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No

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Why do we need an accumulator on a heat pump?

To stop oil from returning to the compressor

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To hold a certain amount of liquid refrigerant all the time

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To hold additional refrigerant in the cooling mode

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To hold additional refrigerant in the heating mode

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Is there a metering device in the accumulator?

Yes

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No

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Which large tube on the reversing valve is the true suction?

Right Port

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Left Port

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Center Port

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Depends on what mode it's operating in

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What causes the reversing valve to shift open & close?

The solenoid

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Suction Pressure

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Compressor Discharge Pressure

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Indoor Coil Pressure

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Outdoor Coil Pressure

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Pressure Differential

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In the cooling mode, which ports should you check for a temperature difference?

TP-1 & TP-4

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TP-1 & TP-2

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TP-2 & TP-4

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TP-2 & TP-3

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TP-4 & TP-4

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TP-3 & TP-4

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In the heating mode, which ports should you check for a temperature difference?

TP-1 & TP-4

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TP-1 & TP-2

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TP-2 & TP-4

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TP-2 & TP-3

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TP-4 & TP-4

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TP-3 & TP-4

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Is it okay to use a couple of panduit straps to hold the TXV sensing bulb down to the copper line?

Yes

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No

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What kind of TXV is used on heat pump systems?

Hard shutoff non-bleed

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Bleed port

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Adjustable

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Non-adjustable

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Bi-Flow

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When mounting the TXV sensing bulb in the horizontal orientation, where does it need to be located on pipes 7/8 and smaller in diameter?

2 O'Clock or 10 O'Clock

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4 O'Clock or 8 O'Clock

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On the very top of the line

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On the very bottom of the line

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Is the sensing bulb on a TXV an opening or closing force?

Opening Force

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Closing Force

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Neither

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Both

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If a HP won’t go into defrost on a standard HP Defrost board, what should be the first thing you should look for?

Make sure you are in the HP heating mode of operation

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Make sure you are in the HP cooling mode of operation

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Make sure you are in the HP defrost mode of operation

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Check for 24 vac on the red wire going to the HP defrost board

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What does the red 24 vac wire power up on the standard defrost control board?

The defrost control board

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Reversing Valve

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Defrost Thermostat

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Timer logic

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Do Deluxe Type Defrost Boards have a defrost thermostat?

Yes

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No

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Will a “Freeze Test” on an evaporator coil in the cooling mode tell you if the coil has a restriction?

Yes

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No

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Depends

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Only if you have a Piston

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