Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Gas Central Heating-Frost switch

  • 01-12-2010 12:04pm
    #1
    queenm
    Closed Accounts Posts: 102 ✭✭


    Ok, I know I should know but I don't, no-one explained it and I never asked but....

    my gas central heating has a frost thermostat setting which as I understand it fires if the temperature drops below 8 degrees. I turned the switch to it but it never came on even when the temperatures dropped. Then it occured to me that while I had the frost switch on, I had the heating switch at off so I flicked it to on and the heating didn't come on immediately like it would usually. So I assumed I had done the right thing - I mean it makes sense, if the system is turned off, it can't fire at all right?

    Can someone confirm I've done the right thing? I had to decamp to my parents the last two nights because I simply couldn't get to my house and I am suddenly deathly afraid I have done the wrong thing and my heating will have been on for two days straight!!


Comments

  • #2
    Red Alert
    Hosted Moderators Posts: 7,486 ✭✭✭Red Alert


    Frost stat would normally be wired so that it bypasses time controls, assuming that the main isolator to the system is on.


  • #3
    JohnnieK
    Registered Users, Registered Users 2 Posts: 2,526 ✭✭✭JohnnieK


    What boiler is it? sounds strange that it has a switch that the user operates. also the frost stat monitors the temperature of the water inside the boiler and if it's inside it would not have dropped that low.


  • #4
    ntpm
    Closed Accounts Posts: 302 ✭✭ntpm


    JohnnieK wrote: »
    What boiler is it? sounds strange that it has a switch that the user operates. also the frost stat monitors the temperature of the water inside the boiler and if it's inside it would not have dropped that low.
    Red Alert wrote: »
    Frost stat would normally be wired so that it bypasses time controls, assuming that the main isolator to the system is on.


    Both post +1.

    Many boilers (Gas and Oil) are equiped with frost protection that should fire up the burner and pump if the internal water temperature drops below 5C or so. The main selector switch normally has to be on (or switched to CH or hotwater) or in standby mode.
    The main indicator light (normally green) must be on all the time, irrespective if any external timeclocks/ stats are in the off mode.

    The only issue you may have is the boiler must have a perminent live feed and unfortunatly many boilesr are wired incorrectly.( Note: perminent live also needed for pump overrun).
    So the frost stat may not actually work when needed.:(

    Bdest option is to have the timeclock comming on and off for short periods during the night and early morning and keep any room stats set to slightly lower temp (ie. 10-15C), so if the house doesn't get too warm.


Advertisement