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zoning oil burner central heating

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  • 21-04-2008 8:25pm
    #1
    burdburd
    Registered Users Posts: 56 ✭✭


    i have a standard oil boiler - it has 3 zones upstairs rads, downstairs rads and hot water tank in the hot press. All 3 zones pumped via a single feed from the boiler and a single variable speed circulation pump. The 2 heating zones have motorised valves whereas the hotwater (hw) has no valve.

    I have installed a 2 gang light switch so that i can manually turn heating on upstairs and/or downstairs by switching the pwr to the motorised valves - that's working fine.

    now i want to add a valve to the hw zone so that after the showers in the morning i can turn off the heat to the hw tank. the Q here is if the two heating zones are turned off and i then turn-off the hw circuit - will my boiler blow up ?

    I work at home and have the heat on quiet a bit - the plan is to zone all 3 areas and then add a multi-zone controller such as http://www.multizone.ie/

    ideas, comments anyone ?


Comments

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    #2
    Sherifu
    Registered Users Posts: 17,727 ✭✭✭✭Sherifu


    Hi, welcome to boards.

    You'd probably get good replies in the Home Appliances or DIY forum.


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    #3
    Mr Magnolia
    Moderators, Recreation & Hobbies Moderators Posts: 10,435 Mod ✭✭✭✭Mr Magnolia


    One thing I'd be concerned about; has your 2-gang switch been rated for that load.

    This would be better suited to DIY, I'll request it be moved.


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    #4
    Ruu_Old
    Closed Accounts Posts: 36,634 ✭✭✭✭Ruu_Old


    Moved from Newbies & FAQ.


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    #5
    TKK
    Closed Accounts Posts: 566 ✭✭✭TKK


    You will need to check if your boiler has an inbuilt bypass valve. This allows for water circulation even if all the zone valves are shut. Ideally the zone valves should be doing the calling for heat from the boiler and wired so that when off the boiler is off.

    I was in a similar situation myself with the two heating zones controlled by room thermostats and the hw not zoned independantly.

    I installed a seperate timeswitch -> cylinder stat -> motorised valve in the hotpress to essentially move the hw onto it's own zone and upgraded the room thermostats to programmable stats enabling complete control of all three zones. All have override/boost functionality and holiday modes for when I'm away. My gas boiler has a bypass valve built in. In order to achieve this I had to run a new cable from the hotpress to the boiler as the original wiring didn't allow for independant zones to call for heat but rather only supplied power to the zones (to be on/off based on the room thermostat) only when the boiler was on through the use of it's timeswitch (now bypassed).


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    #6
    burdburd
    Registered Users Posts: 56 ✭✭burdburd


    thanks for that - i'll have a check for bypass route


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