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  1. #14
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,743
    what model thermostat, how is it mounted???

  2. #15
    Join Date
    Mar 2002
    Location
    fort walton beach fl.
    Posts
    790
    I was using the johnson controls a19abc-24c, but then i found the white rodgers 1687-9.I mount the t-stat where it is easy to get to. Then i stick the bulb right in the coil, about 5 to 6 inches from the top of the coil and about a foot away from the txv.I normally have to play with the cut-in and cut-out temps, but i start by setting the cut-in at 38 and the cut-out at 28.
    Mostly set this up with r-22 systems with a pump down cycle.

    [Edited by smurphy on 10-16-2005 at 09:31 AM]

  3. #16
    Join Date
    Dec 2004
    Location
    Yuba City, CA.
    Posts
    254
    Are they digital read out?
    I will enter His gates with thanksgiving in my heart.

  4. #17
    Join Date
    Mar 2002
    Location
    fort walton beach fl.
    Posts
    790
    Originally posted by lennoxman
    Are they digital read out?
    No, they are electromechanical thermostats.

  5. #18
    Join Date
    Aug 2005
    Posts
    831

    Re: tstat instead of timer

    That seems like a long and pretty wide bulb to fit into the coil, any issues with different coils? Might a tstat with capillary only work better? So you set the stat at 38 degrees with a ten degree differential? (subtractive?). What about people messing with stat ("Hey 38 isnt very cold lets bump it down a couple?") sounds like a good idea though, saves money and one less thing to go wrong.

    http://www.white-rodgers.com/pdfs/04...Cat_pg_135.pdf
    eventu rerum stolidi didicere magistro

  6. #19
    Join Date
    Mar 2002
    Location
    fort walton beach fl.
    Posts
    790

    Re: Re: tstat instead of timer

    Originally posted by cg2
    That seems like a long and pretty wide bulb to fit into the coil, any issues with different coils? Might a tstat with capillary only work better? So you set the stat at 38 degrees with a ten degree differential? (subtractive?). What about people messing with stat ("Hey 38 isnt very cold lets bump it down a couple?") sounds like a good idea though, saves money and one less thing to go wrong.

    http://www.white-rodgers.com/pdfs/04...Cat_pg_135.pdf
    Never had A problem istalling the bulbs on any evap coil in a walk=in.Who makes a heavy duty commercial t-stat with a capillary?Never really had a problem with people messing with the stats after i leave. I always tell them how i set the t-stat for coil temp and not box temp.If i do get called out and someone jacks it down, the first time MIGHT be free. The second time its a 75 dollar lesson.

  7. #20
    Join Date
    May 2012
    Posts
    25
    i just started doing work at this resturant and had a walk in freezer that was icing up i couldnt figure out why defrost work and pressures were fine long story short the manager would shut off the fans and leave the door open when they would load the freezer.

  8. #21
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,563
    Quote Originally Posted by Eadam1985 View Post
    i just started doing work at this resturant and had a walk in freezer that was icing up i couldnt figure out why defrost work and pressures were fine long story short the manager would shut off the fans and leave the door open when they would load the freezer.
    I'd wire in an interlock to shut down the condensing unit (or pump it down until it turns itself off) whenever the manager turns off the fans....
    [Avatar photo from a Florida training accident. Everyone walked away.]
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  9. #22
    Join Date
    May 2009
    Location
    The Pas, Manitoba Canada
    Posts
    212
    Had a walk-in freezer with a door switch that shut only the fans off. Disconnected it after numerous freeze up calls. Another one is store workers sneaking in there for their breaks on a hot day. The store is in a mall and A/C's are maintained by mall maintenance crew and I get lots of calls caused by high humidity/heat in the store. Store manager keeps calling anyhow. The last call was a walk-in meat cooler closing time panic running too warm. Got there and the evap fan switch was off.
    Last edited by K_Neil; 09-16-2012 at 11:51 PM. Reason: memory kicked in

  10. #23
    Join Date
    Sep 2011
    Location
    Fayetteville, NC
    Posts
    130
    Not to change the subject, but we recently got called back to a new customer. Freezer never getting below zero. Excessive water drops on top of walk in freezer. Head manager is a stickler for always closing doors and correcting employees when the door is left open for whatever reason. Walk in freezer, walk in cooler, close the damn door.

    I went out there and saw with my own peepers one of the main problems. Delivery truck had come in. Product left in kitchen. Employee has door wide open for about thirty minutes. I finish my work on the reach in cooler and go over to the freezer. It's not at temp and water drops on the ceiling. I grab the only manager I can see and point out to her that the door can't be left open for an extended time like that and this is the result. Showed her the drops on the ceiling and the coil that was excessively frosted up.


    I learned that employees that make minimum wage dont give a hoot about closing the door to the freezer. it's cold in there.

  11. #24
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,626
    Quote Originally Posted by vzenuh View Post
    Not to change the subject, but we recently got called back to a new customer. Freezer never getting below zero. Excessive water drops on top of walk in freezer. Head manager is a stickler for always closing doors and correcting employees when the door is left open for whatever reason. Walk in freezer, walk in cooler, close the damn door.

    I went out there and saw with my own peepers one of the main problems. Delivery truck had come in. Product left in kitchen. Employee has door wide open for about thirty minutes. I finish my work on the reach in cooler and go over to the freezer. It's not at temp and water drops on the ceiling. I grab the only manager I can see and point out to her that the door can't be left open for an extended time like that and this is the result. Showed her the drops on the ceiling and the coil that was excessively frosted up.


    I learned that employees that make minimum wage dont give a hoot about closing the door to the freezer. it's cold in there.
    The dead giveaway is the garbage bags or bungee cords attached to the shelving that sits behind the door when it's opened.
    Officially, Down for the count

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  12. #25
    Join Date
    Mar 2006
    Posts
    1,032
    pretty much every switch i see that kills the fans also kills the solenoid and puts the unit into pump down.
    You can't kiss death without it kissing you back. Death is a passionate kisser.


  13. #26
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,626
    Quote Originally Posted by marter View Post
    pretty much every switch i see that kills the fans also kills the solenoid and puts the unit into pump down.
    Saw an interesting one today. WIF has 3 disconnects and one toggle switch in the box. 2 evap coils 1 solenoid and tstat. 1 disconnect for fans only. 2 disconnects for heaters, 1 for each coil. Toggle switch kills power to solenoid and fans. Don't know why you would have an option to kill fans only or fans and sollenoid. Probably field engineered by a sparky.
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

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