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Heat sensor to control pump

  • 29-10-2007 8:00pm
    #1
    neveragain
    Closed Accounts Posts: 5 ✭


    Hi all,

    Can anyone give me their advice. I have recently got a new boiler and a new hot water cylinder. I have a heat sensor at the cylinder and I have a pump at the boiler. I would like to be able to control and adjust the tempature at which the pump will start and stop. What will I need in between the pump and the sensor ?

    If anyone can help.


Comments

  • #2
    smashey
    Registered Users, Registered Users 2 Posts: 21,676 ✭✭✭✭smashey


    Moved to DIY.


  • #3
    ircoha
    Closed Accounts Posts: 2,290 ✭✭✭ircoha


    neveragain wrote: »
    Hi all,

    Can anyone give me their advice. I have recently got a new boiler and a new hot water cylinder. I have a heat sensor at the cylinder and I have a pump at the boiler. I would like to be able to control and adjust the tempature at which the pump will start and stop. What will I need in between the pump and the sensor ?

    If anyone can help.
    what else do u have, do u have rads, or is it just u, the boiler and the cylinder?.

    If its a one pump system, IMO, controlling the pump is not the safest solution


  • #4
    neveragain
    Closed Accounts Posts: 5 ✭neveragain


    Just boiler and cylinder


  • #5
    towbar
    Registered Users, Registered Users 2 Posts: 448 ✭✭towbar


    When you say control the pump - presume you mean turn on boiler and pump when temp is low and turn off boiler and pump when temp is high?

    Is the heat sensor in the tank measuring the domestic hot water or is it on the hot water pipe from the boiler?

    I would have thought if the heat sensor has arelay you just use it as a switch to control the boiler?


  • #6
    neveragain
    Closed Accounts Posts: 5 ✭neveragain


    Yes, the sensor is measuring the temperature of the water in the tank. It is probed into the tank and not on a pipe.
    I would like the boiler and pump to come on when the temp of the water in the tank lowers and to go off when the water in the tank heats.
    There is no relay on the sensor.
    All I have is the sensor with attached wires.
    :confused:


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  • #7
    Avns1s
    Registered Users, Registered Users 2 Posts: 3,423 ✭✭✭Avns1s


    The sensor (thermostat) on your tank needs to be wired into the live feed between your timer/on-off switch and your boiler + pump.

    You might be best getting an electrician.


  • #8
    neveragain
    Closed Accounts Posts: 5 ✭neveragain


    Is there an on/off switch with an adjustable thermastactic dial available to control the temp at which the switch makes and breaks ?


  • #9
    10-10-20
    Registered Users, Registered Users 2 Posts: 8,069 ✭✭✭10-10-20


    Yes...
    http://www.ephcontrols.com/catalog/index.php?main_page=product_info&cPath=5_8&products_id=11


  • #10
    towbar
    Registered Users, Registered Users 2 Posts: 448 ✭✭towbar


    yes this will work - sorry i shouldn't have used the word relay but basically there is a set of switched terminals inside that stat that open and close according to the temperature. Use these terminals to switch the live feed to your boiler and pump. Note boiler will also have its own local temp stat that must be in place.


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