MURA and MUAA Hybrid Crossover Knowledge Check 2024

MURA and MUAA Hybrid Crossover Knowledge Check 2024

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Question 1 of 10

1. Question
Which of these accessories does NOT come standard with the 40MUAA fan coil?
- KSACN1001AAA wired remote.
- RG10 wireless remote.
- Braze to flair adapters.
- All these accessories come standard with the 40MUAA fan coil.
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Question 2 of 10

2. Question
Which statement is true when matching the 38MURA with the 40MUAA?
- The 38MURA comes factory charged for 15 feet.
- All sizes will require a 3/8-inch liquid line.
- Both refrigerant lines must be insulated.
- A liquid line dryer is NOT required.
Correct

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Question 3 of 10

3. Question
Select the best answer concerning the 40MUAA fan coil.
- This unit has three coil temperature sensors.
- This unit has a T1 room temperature sensor located near the coil inlet.
- The cooling EXV is located on the indoor evaporator coil.
- All the above.
Correct

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Question 4 of 10

4. Question
Select the best answer concerning the 38MURA heat pump.
- This unit has a push button and two-digit display for checking run status and sensors.
- The reversing valve energizes with 24 Vac in cool mode and defrost.
- Two-wire RS-485 communication wiring is required for operation.
- All the above.
Correct

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Question 5 of 10

5. Question
Which is not a possible scenario for the 38MURA/40MUAA?
- Thermostat wired to fan coil, with RS-485 communication to heat pump.
- Wired remote to fan coil, with thermostat to heat pump.
- Wired remote to fan coil, with RS-485 communication to heat pump.
- Thermostat wired to fan coil, with thermostat wired to heat pump.
Correct

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Question 6 of 10

6. Question
Select the best answer for the crossover application using gas furnace and evaporator coil.
- Metering device must be removed from the indoor coil.
- During a defrost cycle the furnace will operate in “low stage” only.
- A dual fuel thermostat must be used.
- All the above.
Correct

Incorrect
Question 7 of 10

7. Question
Which one of these signals will not operate the 38MURA in heat pump mode?
- 24 Vac to Y1.
- 24 Vac to Y1 and B.
- 24 Vac to Y2 and B.
- 24 Vac to W.
Correct

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Question 8 of 10

8. Question
On which of these Crossover Applications should the 38MURA only operate with an indoor high-speed blower?
- FZ4ANP Fan Coil (2-stage blower)
- FV4C Fan Coil (Variable speed blower)
- 59SP6/926SA Gas Furnace (2-speed blower)
- All the above.
Correct

Incorrect
Question 9 of 10

9. Question
Which of these Crossover Applications cannot provide heat during defrost?
- FZ4ANP Fan Coil.
- FV4C Fan Coil.
- 59SP6/926SA Gas Furnace.
- Emergency Heat on TSTAT to W/W1 on furnace.
Correct

Incorrect
Question 10 of 10

10. Question
Select the best answer concerning the 38MURA heat pump.
- This unit contains a pressure transducer and suction temperature thermistor.
- A call for Y1 can achieve maximum compressor frequency.
- Defrost cycle will energize ‘D’ terminal with 24 Vac, (scenario 3, full 24 Vac operation only).
- All the above.
Correct

Incorrect

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