Open Therm Controller?

Discussion in 'Plumbing and Central Heating' started by Joe4542, 18 Mar 2008.

  1. Joe4542

    Joe4542

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    Evening all,
    Hoping someone may have some experience and be able to recommend a multiple boiler controller using the 'open therm' protocols?
    Basically we've got two Keston C55's, and going to be running them cascade style, were planning to use one of their mulit-rig controllers, but after the boss bought the two boilers from the merchants... Keston now say they cannot sell us the controller on its own - only with one of their pre-assembled rigs, which also has another two boilers! Seems silly but they refuse.

    Tried buying the controller eslewhere since its apparently a Honeywell AX500 - but seems it was made specially for keston.

    So now we're on the hunt, as it were, and have seen a few controllers - but hoping you may know of one in particular which seemed OK?

    Thanks for any Help.
    Joe ;)
     
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  3. Doctor Drivel

    Doctor Drivel

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    Have you looked at the Honeywell Cronotherm OpenTherm, or is it the same unit? You will find Honeywell don't make anything especially for anyone, well not small outfit like Keston.

    Keston being choosy? They have a cheek! They are no Vaillant in size at all. They have a poor reputation to turn around too.
     
  4. Joe4542

    Joe4542

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    Hi, Had briefly looked at it the other day, but did mean to go back an have a thorough read of it, will need to do that now - I'm sure it would be one of the easier ones to get.

    I did wonder if this unit was what keston used, but Plumb center were able to track down the specific one keston have, only after searching for keston AX500 as opposed to Honeywell AX500. It was Keston who said it was a honeywell unit - and it seems they may have actually been telling truth...

    Needless to say I was a bit surprised when the guy at Keston started getting funny, but oh well.

    Thanks
    Joe
     
  5. DIYnot Local

    DIYnot Local

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