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Gas Fired Central Heating / Immersion Question

  • 27-08-2019 9:42pm
    #1
    VonLuck
    Registered Users, Registered Users 2 Posts: 2,361 ✭✭✭


    Should be a straight forward question. I was viewing an apartment to buy which has gas fired central heating. There is a standard heating control (Siemens RWB29 if that makes a difference) and living room wall mounted thermostat control. The heating control has a hot water and central heating option, so can turn on each separately.

    However, there are two switches on a single panel in the hall, one switch saying either "Off" or "On" and the other "Sink" or "Bath". It also has a big red light on it. I do not have this in my current home and am not sure what it's for.

    I did some Googling and it says it's a dual immersion switch. This confuses me as why would you need this if you have gas to heat your water at the press of a button? And why is there a Sink or Bath option? Are these on separate loops?

    Also, a separate question but if I turn on the central heating option on the heating control device, will this also heat water or would I have to turn on both at the same time? My current home only has a single button which heats both at the same time and so it's all I'm used to, so excuse my lack of plumbing knowledge!


Comments

  • #2
    K.Flyer
    Registered Users, Registered Users 2 Posts: 8,565 ✭✭✭K.Flyer


    The immersion for most people with a gas boiler is just a back up in case there is an issue with the boiler.
    The separate hot / water controls on the time clock allows for individual use of the system as you need it. They can be used and programmed separately or together, depending on your requirements.


  • #3
    VonLuck
    Registered Users, Registered Users 2 Posts: 2,361 ✭✭✭VonLuck


    K.Flyer wrote: »
    The immersion for most people with a gas boiler is just a back up in case there is an issue with the boiler.
    The separate hot / water controls on the time clock allows for individual use of the system as you need it. They can be used and programmed separately or together, depending on your requirements.

    So I should have no reason to use it if the gas boiler is full working?

    And is the bath and sink on a separate loop, or why is there a switch for this?


  • #4
    John.G
    Registered Users, Registered Users 2 Posts: 3,623 ✭✭✭John.G


    VonLuck wrote: »
    So I should have no reason to use it if the gas boiler is full working?

    And is the bath and sink on a separate loop, or why is there a switch for this?


    If you have a electric shower and use it and only one or two people in the house then its probably debatable cost wise to switch in the sink immersion for 1/2 hour each morning (for hand washing etc) vs heating up the whole cylinder with gas and subsequent whole cylinder losses, I have oil firing and used the electric shower/immersion in the summer for years until I installed a modest solar system which gives me bags of hot water for ~ 6/7 months with occasionally switching in the sink immersion on prolonged cloudy days.


    Re the sink/bath, the main switch (with neon light) is a isolating switch and supplies power to a common terminal for both the sink and bath but only one is selectable, if none is required, simply switch off the main switch.


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