I change an evap fan motor
Allied Refrigeration 440-823-5720
west side of Cleveland, ohio

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44 thoughts on “Refrigeration evaporator fan motor change on a walk in cooler

  1. Steve Wood says:

    The Klein pliers look nice Jim. If that spring tension holds up they should last a long time. I think I'll try a pair.Klein I believe still makes tools here in the U.S. First Chicago, now I think they are in Texas. I think I want to try those "in line" stake on terminals. Great video!

  2. Dwight Bennett says:

    We think alike on those screwdrivers, those are so much lighter weight that the rubber cushion grip models.
    What came to mind about the new motor is that it really has a higher power factor with the run cap., not just a lower amp draw.

  3. Armando Torres says:

    Hi Jim!! Really appreciate the videos!!! Question, we replaced an evap fan motor in our walk in freezer and the motor spins considerably slower than the original… It seems like its being sucked in from the draft of the other fan motor.. The only thing I can think of is that it's the wrong wattage(replaced with a 9W motor, only thing we had in stock)… The original has no data as far as wattage.. Is there a standard wattage that these fan motors should be??? I want to buy some to have in stock and replace the motor in question… Any information would be greatly appreciated!!! Thanks and keep up the good work with the vids!!!

  4. Robert Gomez says:

    jim i been working on residential ac for 18 yrs just started to troubleshoot refrigeration and wanted to a ask if you got any videos of a walking cooler with a leaking liquid line solenoid

  5. Derek Obidowski says:

    its a PSC or Permanent Split Capacitor motor as the old motor that draws more than two amps its a no brainer its a Shaded Pole type motor as some of these motors have the Bohn and Larkin plugs as others they have multiple wires to wire it to either 115 or 208-230 volts as i put one of these type of motors in my Vornado 723 full size air circulator and lucklly the run capacitor clears the inlet air accellerator but i had to drill out the short studs and put in longer 8.32 screws so it worked for this Vornado application and wired it to a Variable speed Triac control and it works the motor i used is a US Motors 9662. As i highly recommend PSC motors in commercial refrigeration and if you have Vornado or an older box fan u want to go with an energy efficient motor. as some of these motors willeither have sleeve or sealed ball bearings it depends on what motor you buy.

  6. Paul Tavish says:

    Jim, I've been doing commercial refer now about 3-4 yrs. Started with commercial refer and then did market for a couple years and know I'm back to commercial. You mentioned the TD was too low and you adjusted it, how? Did you adjusted your valve and increase the super heat a bit?

  7. cathman7 says:

    Have you tried any of the replacement ECM motors for this type / size / application? I have tried a few that have bearings lubed for low temp applications. They usually are multi-voltage, and usually you would only have to select the correct rotation. I believe the mounting holes were even the same.
    The ECM style uses even less wattage than the PSC type, which you were commenting about how much less wattage that type uses. Since refrigeration evap. fans run continously, the energy savings add up quickly, and hence pay-back in a reasonable amount of time. Since you stated the evaps were used, it may be a selling and saving point for the owner, to suggest you change out all the motors to the energy saving type. Some utility companies will even give the customer a "rebate" for making those changes to energy saving motors, decreasing the payback time even sooner!

  8. kreator75 says:

    Nice video Jim. Question for you (or anyone who can help) .. I have a friend who owns a deli and my commercial refrigeration experience is limited, but he was told by the last technician that one of the fans was supposed to blow backwards through the evap coil? Does this sound right or should they all blow the same direction? It's an old Larkin. Thanks

  9. Terrible1 says:

    its kind of hard to install those fans backwards. the set screw is in the front of the blade the way it should be pushing the air out. Don't know why someone would go through the trouble of going behind the fan blade to tighten down the set screw but there's all kinds of dummies out there.

  10. walburg11 says:

    Most Heatcraft condenser units have the defrost timer included behind the electrical service cover. Defrost timers inside the cooler tend to corrode and cause erotic problems. In the restaurant industry there is also a lot of acid in their coolers from Vegetables. Including citric acid (found in tomatoes, cayenne peppers and even lettuce), oxalic acid and benzoic acid. Pinhole coil failure will also occur with this. I realize this is just a beverage cooler and the customer doesn't want soggy cardboard boxes as the bottom falls out when you lift them. On another note, I'm still not 100% on adjusting the TXV without knowing superheat and subcooling, but an experienced tech will be close just by the feel of the refrigerant lines. This is an excellent video and Jim does a great job explaining this repair, the oil trap not needed, and the condenser unit installed backwards. Exposed cooling fins are also subject to hail storms or just daily vendor delivery's bumping into it and laying the fins down restricting air flow.

  11. Sven sorensen says:

    Sorry Jim, but the piping with the P' Trap was correct. If you run the suction pipe from the evaporator directly down to the compressor you will destroy the compressor very quickly. When the compressor stops running, all the refrigerant will drain out of the evaporator and all end up in the compressor below. Liquid refrigerant being lighter than oil will stay at the bottom of the compressor. Next time the compressor starts it will have refrigerant going through the bearings instead of oil, eventually the compressor will seize. Always have the suction pipe run out of the room at up at least mid point of the evaporator to avoid this liquid migration.

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