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Discuss Help please with doorbells in the Commercial Electrical Talk area at ElectrciansForums.co.uk.

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  1. Brian M
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    Brian M EF Member

    Location:
    Glasgow
    Business Name:
    -
    Hi,
    Ive just tried to fit the Honeywell Skybell trim door push to my existing mechanical chime and it seemed to go fine. The Skybell door push seems to work fine but my mechanical chime is constantly ringing, not sure why. Any suggestions? My chime has a 14v transformer and the door push says it requires anything between 8-30vac or 12vdc transformer. In the UK here. Picture of current chime attached.

    Thanks.
    Brian

    20170809_175312.jpg
     
  2. Pete999
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    Pete999 Trusted Advisor

    Location:
    Northampton
    Contacts sticking inside the door push button?
     
  3. Brian M
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    Brian M EF Member

    Location:
    Glasgow
    Business Name:
    -
    Not sure because the video function is not activating all the time. Its just the mechanical door chime that is making a noise without pressing the push. If you press the push the video starts to work.
     
  4. SparkyChick
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    SparkyChick Making a banana smoothy for my fave gorilla Electrician's Arms

    Location:
    South Wales
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    SparkyChick
    Hi Brian,

    In a normal setup, your chime, the transformer and the switch form a simple circuit where no power can flow until the switch is pressed. For active devices such as the Skybell, power must be flowing all the time (to power the integrated electronics).

    It sounds like this permanent flow is enough to energise the coil sufficiently for it to strike the chime.

    If you look at the very brief installation instructions, when operating without a chime, it's necessary to include a load resistor (I believe it's 10 ohms with a power rating of 10 watts). You could try adding a resistor in series (i.e. disconnect one of the switch wires at the transformer, connect the resistor to it and then the other end to the terminal strip). This may restrict the current flow enough to stop the chime working, whilst allowing the device to operate.

    Personally, I'd try the 10 ohms 10w resistor they recommend as a starting point and see how it goes.
     
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  5. Brian M
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    Brian M EF Member

    Location:
    Glasgow
    Business Name:
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    Sadly no sucess with the resistor. It slowed down a bit but was still ringing. Also the skybell didn't work. Any other suggestions?
     
  6. SparkyChick
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    SparkyChick Making a banana smoothy for my fave gorilla Electrician's Arms

    Location:
    South Wales
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    SparkyChick
    The chime you have... when you pressed your old bell push, did it ring continuously or just chime once?
     
  7. SparkyChick
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    SparkyChick Making a banana smoothy for my fave gorilla Electrician's Arms

    Location:
    South Wales
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    SparkyChick
    I've just looked up the Legrand part no "0 412 43". The documentation says you must take lamps out of the bell pushes (in the case of illuminated pushes) which suggests to me that it requires very little current flowing through the device to drive it.

    I suspect, given the transformer is mounted on a PCB that on the other side of that is a driver circuit that turns the coil on and off to generate the constant ringing which that bell should provide.

    If the current flowing through an illuminated bell push is enough to trigger it, it's unlikely you'll be able to use it with the SkyBell system as that's likely to require more current than a bell push lamp.

    In this instance, I'd say you're out of luck and you probably need to change the sounder part of the system.
     
  8. telectrix
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    telectrix Scouser and Proud of It Trusted Advisor

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    Telectrix
    disconnect them all. bailiffs/police/joby's witnesses/mormons/charity collectors/survey teams, all think you're out so they then go pester some other idiot.
     
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  9. Brian M
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    Brian M EF Member

    Location:
    Glasgow
    Business Name:
    -
    Is there any particular type or brand that you think I shoild get?
     
  10. Ian1981
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    Ian1981 Electrician's Arms

    Location:
    North east
    Deta are pretty good.
    Run your bell wire from the push to the transformer.
    A simple live and neutral 230 v connection to the transformer and your good to go
     
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  11. Brian M
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    Brian M EF Member

    Location:
    Glasgow
    Business Name:
    -
    Do you think the Byron 776 would do the job for the skybell trim?
     
  12. SparkyChick
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    SparkyChick Making a banana smoothy for my fave gorilla Electrician's Arms

    Location:
    South Wales
    Business Name:
    SparkyChick
    Unfortunately I don't have any experience of either so am unwilling to say yes it will definitely work, but I suspect it would be fine.
     
  13. Brian M
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    Brian M EF Member

    Location:
    Glasgow
    Business Name:
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    Thanks SparkyChick. Will give it a try
     
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