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  1. #1
    Join Date
    May 2003
    Location
    Dixie
    Posts
    1,344

    Duke steam table

    Model #E305M...never worked on a steam table...I do the refrigeration and a/c at this resturant...anyway one control is either on hi or on off, no adjustment in between...is this called an infinity control and not a temperature control?..and how does this infinity control work...they were too busy to remove the front cover so I will have to return with the right control if I can locate one..thanks guys
    It is time for all good men to come to the aid of their country, for we are in deep crap.

  2. #2
    Join Date
    Dec 2005
    Location
    Memphis, TN.
    Posts
    823
    Page 1833 of the Johnstone supply catalog #197L you have to know if it's 110 or 220.

    110 part # is F16-713
    220 part # is F16-514

    These are the two popular controls but this will get you in the right area of the catatlog anyhow.


    CW.
    "I don't care what you could get it off the net for, they wont warranty it and neither will I"!

    And if you don't like my "flat rate up front pricing" try and negotiate the price on that big mac you just bought pricing is exactly the same method!

  3. #3
    Join Date
    May 2003
    Location
    Dixie
    Posts
    1,344
    Hey, thanks CW...
    It is time for all good men to come to the aid of their country, for we are in deep crap.

  4. #4
    Join Date
    May 2004
    Posts
    11,968
    Take it apart, it's pretty cool

    An infinite control works off of a internal bi-metal heater. The knob will show
    Hi, Off, Low with numbers in between Hi and Low. It is rated to 15 amps but they rarely go bad internally. They burn up from bad wire terminal connections.

    As the knob is turned from Off to Low the bi-metal heats up until it bends which breaks the internal power contacts. As it cools the bi-metal returns to it's original shape which closes the contacts. The higher the number the further the bi-metal has to move to break the contacts. In Hi it will not break the contacts.

    Be sure to use only hi temp spade terminals and hi temp wire. On the back you will find L1, P, L2 on the top and H1 and H2 on the bottom.

    Power to L1, Pilot light to P and power or neutral to L2.

    One side of the element to H1 and the other to H2.

    Be careful working with OEM Hatco as H1 and L2 are reversed.
    Last edited by Dad; 03-02-2007 at 08:29 PM. Reason: spelling

  5. #5
    Join Date
    Nov 2003
    Location
    Wisconsin
    Posts
    458
    I carry them in the truck for toasters and such, but always wondered why they call them infinity switches or controls. Any ideas?

  6. #6
    Join Date
    May 2003
    Location
    Dixie
    Posts
    1,344
    Thanks Lusker...picked one up fri...got to work around the kitchen staff and pull the front cover, looks simple enough....appreciate the info
    It is time for all good men to come to the aid of their country, for we are in deep crap.

  7. #7
    Join Date
    Dec 2005
    Location
    South Bend, In.
    Posts
    529
    Quote Originally Posted by frigetater View Post
    Model #E305M...never worked on a steam table...I do the refrigeration and a/c at this resturant...anyway one control is either on hi or on off, no adjustment in between...is this called an infinity control and not a temperature control?..and how does this infinity control work...they were too busy to remove the front cover so I will have to return with the right control if I can locate one..thanks guys
    Tater try this site they have info on how commerical cooking equipment parts work,
    http://www.icca.invensys.com/uniline/index.htm.
    It's robert shaws site if you can get one of their product books it'll help woking on thses units.
    So you didn't ask, what you though was a stupid question. Now how, are you going to tell the boss about your stupid screw up?

  8. #8
    Join Date
    May 2003
    Location
    Dixie
    Posts
    1,344
    thanks ND.....good info there
    It is time for all good men to come to the aid of their country, for we are in deep crap.

  9. #9
    Join Date
    Mar 2007
    Location
    Regina SK Canada
    Posts
    20
    Hi I found that the duke cap tube style t-stat's are to expensive to replace. I recommend the infinite heat switch from robertshaw. part# 6500-25 (120 volt) or 6500-208 (208/240 volt) very eazy to install.They work on voltage resisitance. You will also need a control knob for the new control as well.

  10. #10
    Join Date
    May 2004
    Posts
    11,968

  11. #11
    Join Date
    May 2003
    Location
    Dixie
    Posts
    1,344
    Quote Originally Posted by Sparkplug101 View Post
    Hi I found that the duke cap tube style t-stat's are to expensive to replace. I recommend the infinite heat switch from robertshaw. part# 6500-25 (120 volt) or 6500-208 (208/240 volt) very eazy to install.They work on voltage resisitance. You will also need a control knob for the new control as well.

    yes, it had the infinite switch....first one for me to replace...nothing to it...kinda like an electric oven switch...the word "infinite" threw me off
    It is time for all good men to come to the aid of their country, for we are in deep crap.

  12. #12
    Join Date
    Sep 2006
    Posts
    56
    Be careful, if you have more than one control, and they are wired to a single pilot light, you can blow all the controls if you reverse L1 and L2 from one contol to another. Been there done that!

  13. #13
    Join Date
    Apr 2004
    Location
    Charlotte, NC
    Posts
    648
    Infinite because they can be set anywhere between low and infinity. Make sure the switch is turned upright for the vent, and the robertshaw version is a cheapo, they often burn up internally, usually by the casing overheating and falling apart.
    "Fighting Ignorance since 1973 (It’s taking longer than we thought)." The Straight Dope.

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