compressor start up and adjust the superheat on the expansion valves

Allied Refrigeration 440-823-5720 Cleveland, Ohio

jdpettinato@gmail.com
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25 thoughts on “Walk in cooler install part 2

  1. keith richards says:

    Whats up Jim, on this video  you didn;t mention anything about what method is use for defrost. I also would like to know what voltage operates evaporator fans. Thanks again for awesome videos.

  2. abolish federal reserve says:

    thank you for an other great video!!! question ? when you ajusted the txv and your target was "13" .what is this 13 ? and whe you started the video I check pressure target and i chose 58 psi = 22F so I would get 37F at the evaporator. it is rigth? thank you again for you time .

  3. Sivmeng Chhour says:

    thank you jim. again I don't have a temperature like the one you have. but have fieldpiece sman3 if i put a low side in the suction line and the two clip one to evap and one to txv will it work?

  4. Mike Malone says:

    Also , as the SH is established on the coils, it's like 40 on the compressor, and nearing 60 SLT. When summer comes, that won't provide enough cooling for the compressor.(R134a. Med temp )

  5. Mike Malone says:

    I just noticed something on my Alco Cut sheet. The pressure on the TXV outlet is higher than the outlet pressure of the coil. Therefore, the temperature on the TXV outlet, is warmer ( this is what I was seeing in the field), than the temperaure outlet of the coil because of its lower pressure. They only show a 10# pressure drop through the coil on a single pass coil. I m not sure what Alco's pressure drop is on a multi feed coil.

  6. TheRueuhy says:

    Thanks for posting this one. Last week I replaced an old heatcraft condenser (with a Bohn) and converted the cooler to R-404a from R-22. I also replaced the heads and cartridges in the expansion valves. I had 3 evaporators as well. The cooler was mostly set up for soda so pretty similar. Initially I thought I had a problem with the solenoid located in condenser instead of cooler. Unit would pump down initially but would take a long time. Found out I had electrical feedback to 240v solenoid and it wasn't seating completely. Pretty weird, huh? Originally I had #1 on defrost to first leg on contactor and N (neutral) to the third leg. I switched my neutral to the second leg for defrost clock on contactor and that corrected the problem. System pumped down quickly after that. Unfortunately I only have one meter to set my superheat so my adjustments took a little longer (especially with cooler still stocked). But this job was almost exactly like the one you did in this video. I just happened to come across it today. Thanks Jim for your professionalism and knowledge. I was gonna set my superheat a little lower but your video confirmed what I did set them to. Thanks again. I wish I had video'd the job but I don't really have the equipment. Maybe I should invest?

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