How to wire controls to a walk in cooler

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28 thoughts on “Basic walk in box control wiring

  1. owentp says:

    Awesome explanation,Dave. May have 1 or 2 other questions after you answer this. We have a new heatcraft model where the thermostat is built in. Do you have any pearls of how to wire that? Thx.

  2. Ivansgarage says:

    what if you didn't have a T-stat or solenoid valve on the evaporator, less problems, couldn't you control box temp with the LP control on the condensing unit? last time I checked, pressure is temp… did this stuff for thirty years…

  3. Abdorakeeb Naji says:

    Very good vedio…if you get a chance please will you make another vedio for head pressure troubleshooting on top units and how to fix that issue. I seen this problem a lot compressor turned on for a seconds then shuts off over and over…thank you

  4. Floyd Davis says:

    Great video, I just had one question, for the solenoid valve. I re watched the video many times. So you land L1 for the solenoid valve on N.O ??? I thought it would go on N.C since the solenoid valve opens when energized and is in the N.C position when when it’s not energized by the Tstat… can you you explain that. Thanks in advance

  5. BluegrassDNA says:

    Thanks for the basics. Also I can add set the low pressure cut out above vacuum on those scroll compressors if they pump down to a vacuum it kills them quick, right? Use your gouges to set the lpco switches.

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