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Connecting a timer to a heatpump

  • 06-01-2010 1:08pm
    #1
    dryan
    Registered Users, Registered Users 2 Posts: 505 ✭✭✭


    I have a heatpump that is running alot in this weather.
    At night time its running on night saver electricity.

    Day time rate is expensive so i would like to shut the pump down for a while during the day..

    I was thinking of installing a timer on the power line coming into the heatpump to reduce the day time running time/costs.....

    Cut the power off from about 7:00 till 13:30 - and then again from about 17:00 till 22:00.

    My question is, if the pump is running and the power is cut off by the timer, will this have an effect on the pump mechanism of shutting down properly?

    Just said id throw a question up here before ringing the supplier/installer.


Comments

  • #2
    holdfast
    Registered Users, Registered Users 2 Posts: 1,152 ✭✭✭holdfast


    Do you have stats/and or a prgrammer. These will allow to control the heap pump better so if you dont get them put in and talking to the HP. Surprised that this is not done in the first place. If they are in you may need to increase your insulation and improve your air tightness to reduce the heat loss and thus the HP operation. Your HP show come on at night and the house should have the ability to retain the heat. If some cases and best practice a HP should be sized to meet the 90% heating demand over a heating period and you could top up the rest with a stove. I use the datatherm programmer and find it top notch.


  • #3
    al2009
    Registered Users, Registered Users 2 Posts: 177 ✭✭al2009


    Do not cut the mains through a timer, the compressor should have a crackcase heater(keeps the oil warm and stops refrigerant condensing in the oil), does the system not have a timer with the thermostat?

    If not you could contact a fridge man or electricican there is usually a remote start/stop terminal that a timer can be hooked up to. If you have a copy of the units wiring diagram pm me with it.

    al


  • #4
    dryan
    Registered Users, Registered Users 2 Posts: 505 ✭✭✭dryan


    Thanks for the replies.

    Each room is running on its own stat.

    I have seen the pump run for hours even when the rooms are not even demanding any heat.

    My understanding of the system is that when the water is hot, and the rooms are not demanding any heat, the pump should shut down - that doesnt seem to be happening too often in my case during this cold spell.


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