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2023 Humidimizer Training Day 2 Test

2023 Humidimizer Training Day 2 Test

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Question 1 of 21

1. Question

When a system is in Sub-Cooling Mode, you should expect the leaving air temperature to be _________ warmer than Normal Mode.

0 – 5°F
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5 – 7°F
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10 – 15°F
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Same temperature as Normal Mode
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None of the above
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Question 2 of 21

2. Question

All Humidimizer unit will include accessories

Crankcase heaters
Correct Incorrect Correct answer

Low ambient temperature lockout thermostat
Correct Incorrect Correct answer

Low ambient head pressure controls
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All the above
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None of the above
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Question 3 of 21

3. Question

When the system is in Sub-Cooling Mode, the CSV (cooling solenoid valve) will be?

Open
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Closed
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Question 4 of 21

4. Question

Which mode caused the DSV (discharge Solenoid valve) to be energized?

Normal Cooling Mode
Correct Incorrect Correct answer

Reheat Mode
Correct Incorrect Correct answer

Sub-Cooling Mode
Correct Incorrect Correct answer

Heating Mode
Correct Incorrect Correct answer

Correct

Incorrect
Question 5 of 21

5. Question

Humidimizer Reheat Mode is activated to address Latent humidity load and not effect sensible load.

True
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False
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Correct

Incorrect
Question 6 of 21

6. Question

If a customer is complaining that the conditioned space is uncomfortable, it could be caused by?

Improper refrigerant charge
Correct Incorrect Correct answer

Dehumidification setpoint too high
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System oversized
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All the above
Correct Incorrect Correct answer

Correct

Incorrect
Question 7 of 21

7. Question

Which transform is used to control 24vac to the Humidimizer solenoids?

Transformer 1
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Transformer 2
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Correct

Incorrect
Question 8 of 21

8. Question

What 24vac control signal determines Sub-Cooling or Reheat Mode?

Y1
Correct Incorrect Correct answer

Y2
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Dehumidification demand
Correct Incorrect Correct answer

W1
Correct Incorrect Correct answer

All the above
Correct Incorrect Correct answer

Correct

Incorrect
Question 9 of 21

9. Question

At what temperature will Sub-Cooling and Reheat Mode be locked out at?

30°F
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40°F
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50°F
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Never locked out
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Correct

Incorrect
Question 10 of 21

10. Question

What type of evaporator metering device is used in a Type 2 Humidimizer?

TXV
Correct Incorrect Correct answer

Accutrol
Correct Incorrect Correct answer

EXV
Correct Incorrect Correct answer

None of the above
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Correct

Incorrect
Question 11 of 21

11. Question

A Type 2 Humidimizer with 2 refrigerant circuits will have ______ solenoid valves.

2
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3
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4
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5
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6
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Correct

Incorrect
Question 12 of 21

12. Question

In the Normal Cooling Mode, which solenoid valve will be normally closed?

DSV (Discharge)
Correct Incorrect Correct answer

CSV (Liquid)
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Both
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Neither valve is closed
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Correct

Incorrect
Question 13 of 21

13. Question

If the space temperature and humidity level is higher than the thermostat and humidity setpoint, what mode will be active?

Normal Cooling Mode
Correct Incorrect Correct answer

Sub-Cooling Mode
Correct Incorrect Correct answer

Reheat Mode
Correct Incorrect Correct answer

Heating Mode
Correct Incorrect Correct answer

Correct

Incorrect
Question 14 of 21

14. Question

When “Y1” circuit energizes the CR1 relay on the Reheat control board, it opens and locks out the RDV (discharge) circuit solenoid?

True
Correct Incorrect Correct answer

False
Correct Incorrect Correct answer

Correct

Incorrect
Question 15 of 21

15. Question

If the smoke alarm safety N/C control circuit opens, all the accessory control boards will lose 24vac?

True
Correct Incorrect Correct answer

False
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Correct

Incorrect
Question 16 of 21

16. Question

The Sub-Cool Reheat coil is located _____________ the evaporator coil.

Before
Correct Incorrect Correct answer

Downstream
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Correct

Incorrect
Question 17 of 21

17. Question

When the system is in heating mode “W”, the system can still activate Reheat mode?

TRUE
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False
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Correct

Incorrect
Question 18 of 21

18. Question

When refrigerant charging a Humidimizer system, what mode should the system be in?

Normal Cooling Mode
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Sub-Cooling Mode
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Reheat Mode
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Correct

Incorrect
Question 19 of 21

19. Question

The outdoor economizer damper can open and provide free cooling when the system is in Reheat Mode?

True
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False
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Correct

Incorrect
Question 20 of 21

20. Question

Three way liquid solenoids are used in ___________ Humiditrol systems.

Type 1
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Type 2
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Type 3
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Are never used
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Incorrect
Question 21 of 21

21. Question

On an EcoBlue system with ECM blower motor, if the blower motor will not cycle on and there is 24vac at the “G” terminal, what else should be checked?

IFO 24vac circuit from the Ignition Control Board
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Line voltage to the blower motor
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10 vdc signal from the ECM motor to Main Control Board
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All of the above
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None of the above, just change the motor
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