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.
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RG10 wireless remote.
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Braze to flair adapters.
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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.
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All sizes will require a 3/8-inch liquid line.
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Both refrigerant lines must be insulated.
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A liquid line dryer is NOT required.
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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.
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This unit has a T1 room temperature sensor located near the coil inlet.
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The cooling EXV is located on the indoor evaporator coil.
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All the above.
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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.
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The reversing valve energizes with 24 Vac in cool mode and defrost.
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Two-wire RS-485 communication wiring is required for operation.
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All the above.
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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.
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Wired remote to fan coil, with thermostat to heat pump.
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Wired remote to fan coil, with RS-485 communication to heat pump.
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Thermostat wired to fan coil, with thermostat wired to heat pump.
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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.
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During a defrost cycle the furnace will operate in “low stage” only.
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A dual fuel thermostat must be used.
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All the above.
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Question 7 of 10

7. Question

Which one of these signals will not operate the 38MURA in heat pump mode?

24 Vac to Y1.
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24 Vac to Y1 and B.
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24 Vac to Y2 and B.
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24 Vac to W.
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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)
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FV4C Fan Coil (Variable speed blower)
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59SP6/926SA Gas Furnace (2-speed blower)
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All the above.
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Question 9 of 10

9. Question

Which of these Crossover Applications cannot provide heat during defrost?

FZ4ANP Fan Coil.
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FV4C Fan Coil.
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59SP6/926SA Gas Furnace.
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Emergency Heat on TSTAT to W/W1 on furnace.
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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.
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A call for Y1 can achieve maximum compressor frequency.
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Defrost cycle will energize ‘D’ terminal with 24 Vac, (scenario 3, full 24 Vac operation only).
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All the above.
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