User Manual Q&AAnswer
Feb 20, 2025 - 08:22 PM
To test the functionality of the nVent NHZ43 Spectracool Hazardous Location Air Conditioner before mounting it to the enclosure, follow these steps:
1. Ensure that the air conditioner has been in an upright position for a minimum of five (5) minutes before testing.
2. Refer to the nameplate on the air conditioner to determine the proper electrical current requirements.
3. Wire the unit to a properly grounded power supply using copper conductors only. Make sure to restrain the power supply wiring after field installation to prevent contact with the internal fan.
4. Check that the minimum circuit ampacity is at least 125% of the amperage shown on the unit nameplate.
5. Do not connect any other equipment to the same circuit to prevent overloading.
6. After applying power, the evaporator blower (enclosure air) should start running immediately. Operate the air conditioner with the compressor running for five (5) to ten (10) minutes.
7. Set the cooling thermostat or controller setpoint below the ambient temperature to operate the compressor.
8. Within a few minutes after the condenser impellers start, the condenser air temperatures should be warmer than normal room temperatures.
9. Refer to the Sequence of Operation in the instruction manual for specific details on how the unit operates when powered up.
By following these steps, you can test the functionality of the air conditioner before mounting it to the enclosure.
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