1. Forum
  2. Usenet
  3. SCI.ELECTRONICS.BASICS

  • Thermostat

    From Olden@21:1/5 to All on Tue Feb 16 12:55:07 2021
    Best to ask here or ?

    My gas furnace is a Holly.
    It has an old mercury two wire thermostat.

    I want to change the thermostat so that I can set the same two
    temperature ranges, day / night, for every day.

    I do not understand thermostats.

    The local store does not know how to advise me.

    Thermostat suggestions please and maybe a little tutorial.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Sjouke Burry@21:1/5 to Olden on Wed Feb 17 00:41:20 2021
    On 16.02.21 21:55, Olden wrote:
    Best to ask here or ?

    My gas furnace is a Holly.
    It has an old mercury two wire thermostat.

    I want to change the thermostat so that I can set the same two
    temperature ranges, day / night, for every day.

    I do not understand thermostats.

    The local store does not know how to advise me.

    Thermostat suggestions please and maybe a little tutorial.

    It would be nice to know the open voltage and the switch current when
    closed.
    Around 24 volts any ordinary programmable thermostat unit might do.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From amdx@21:1/5 to Olden on Tue Feb 16 18:03:01 2021
    On 2/16/2021 2:55 PM, Olden wrote:
    Best to ask here or ?

    My gas furnace is a Holly.
    It has an old mercury two wire thermostat.

    I want to change the thermostat so that I can set the same two
    temperature ranges, day / night, for every day.

    I do not understand thermostats.

    The local store does not know how to advise me.

    Thermostat suggestions please and maybe a little tutorial.

    The easy way is to have two thermostat and a switch. Have one adjusted
    for day and the other for night and

    day/night switch to go between them. It gets more complicated if you
    have an air conditioner to deal with.


    --
    This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From danny burstein@21:1/5 to Sjouke Burry on Wed Feb 17 02:19:59 2021
    In <602c5820$0$27446$e4fe514c@textnews.kpn.nl> Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> writes:

    On 16.02.21 21:55, Olden wrote:
    Best to ask here or ?

    My gas furnace is a Holly.
    It has an old mercury two wire thermostat.

    I want to change the thermostat so that I can set the same two
    temperature ranges, day / night, for every day.

    I do not understand thermostats.

    The local store does not know how to advise me.

    There are (or at least were...) plenty of thermostats
    with multiple settings that followed the time of
    day and used a battery to operate the clock, hence
    could be hooked up to a basic two-wire control system
    and not worry about wiring for power.

    --
    _____________________________________________________
    Knowledge may be power, but communications is the key
    dannyb@panix.com
    [to foil spammers, my address has been double rot-13 encoded]

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Evgeniy@21:1/5 to Olden on Wed Feb 17 07:11:34 2021
    Hello, Olden!

    On Tue, 16 Feb 2021 12:55:07 -0800
    Olden <Olden@Olden.com> wrote:

    Best to ask here or ?

    My gas furnace is a Holly.
    It has an old mercury two wire thermostat.

    I want to change the thermostat so that I can set the same two
    temperature ranges, day / night, for every day.


    Just an idea: you can use two thermostats and mechanical 24 hour timer to switch them. Something like that: https://www.theben.de/en/syn-161-d-1610011 Timers can be different, with different outputs (output relay type/voltage/current, etc), this is just
    an example. If you do not need precision time keeping on power loss, it's preferable to use a timer without battery (no potential battery leaking out). I do not know your schematics and may be any safety limits, so it's just an idea.


    ------
    With Best Regards,
    Evgeniy

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Olden@21:1/5 to danny burstein on Thu Feb 18 16:18:51 2021
    I need to buy on-line.
    Any model numbers ?
    What terminology do I look for ?

    Please help.


    danny burstein wrote:
    In <602c5820$0$27446$e4fe514c@textnews.kpn.nl> Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> writes:

    On 16.02.21 21:55, Olden wrote:
    Best to ask here or ?

    My gas furnace is a Holly.
    It has an old mercury two wire thermostat.

    I want to change the thermostat so that I can set the same two
    temperature ranges, day / night, for every day.

    I do not understand thermostats.

    The local store does not know how to advise me.

    There are (or at least were...) plenty of thermostats
    with multiple settings that followed the time of
    day and used a battery to operate the clock, hence
    could be hooked up to a basic two-wire control system
    and not worry about wiring for power.


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From whit3rd@21:1/5 to Olden on Thu Feb 18 22:43:16 2021
    On Thursday, February 18, 2021 at 4:19:01 PM UTC-8, Olden wrote:
    I need to buy on-line.
    Any model numbers ?
    What terminology do I look for ?

    Almost any 'smart' thermostat can do a daily fallback, but this
    does mean it's a display-and-buttons-and-clock elaborate item.
    Honeywell is a big manufacturer, their web site should give you
    some ideas <https://honeywellstore.com/store/products/wi-fi-7-day-programmable-thermostat-honeywell-rth6580wf.htm>

    Look at a few, and maybe check out the manuals online.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dan Purgert@21:1/5 to Olden on Fri Feb 19 12:58:39 2021
    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA512

    Olden wrote:
    Best to ask here or ?

    My gas furnace is a Holly.
    It has an old mercury two wire thermostat.

    I want to change the thermostat so that I can set the same two
    temperature ranges, day / night, for every day.

    I do not understand thermostats.

    The local store does not know how to advise me.

    Thermostat suggestions please and maybe a little tutorial.

    The major thing you need to know is the control voltage - that SHOULD be stamped / molded into your existing thermostat. After that, it's a
    quick wire-for-wire swap -- check the existing, it's probably labeled as
    "W" / "R" (for "White" and "Red" wire, respectively). Connect those
    wires coming out of the wall to the same terminals of the new thermostat (ignore Y/B/etc, as those connections are for cooling / multi-stage
    heat / etc.).

    Then program the thing for whatever temperatures you want.



    -----BEGIN PGP SIGNATURE-----

    iQIzBAEBCgAdFiEE3asj+xn6fYUcweBnbWVw5UznKGAFAmAvtf8ACgkQbWVw5Uzn KGAJgQ/7BaRtLSHPb5OMbXtfRtoEzQEDtcOSnZiA3U1ZWg/HzX9XLnYqz5xVBCNC fe6h7WQCVISPkkMEgrrTgtUbiYOJ8HTdknIGNAtqVaJCGzjYuaohrhfpL5En5Ic5 j1r6oLhW+VOv3qTqiVIw8eVkJB8vHTq6iGSoJWvvp+/3s+8CwRoSrQOvJc12oQE0 GzGYEXagKcV552FlFurM+6jJZ+DRlf4IsXUyZu7icF6Jkva5KyQDuLLV8uLHVz+V VAF1F7zchOEAEn5zvWHvCHFSIAtYWFsQp+2oCKwGSt+JsrqZxSrCkCCgSc+aEWJv 2EJiN9Mxbi7FO4FHhGx2F9peRU5cnxzceugWPcCezcL6AAM3S3hj94NmQGYn6EAP bLBh2qaIcdk+uJk6o2zBamohUReXl/drXa69pjBuaZKvMRMunD8+S1XyLIqWqMZy Oc9Uc425ORnq270nqFHY00qZcHLr2QiqmwLPbwMFjzD0KxHPlSsF/QDO/dj+rBg9 r1waIqH9sy/urAuVmu2Ha5lNjQcGRk7ORDdaU/pIwrMMJya1K/ppMelqhR8+UmE2 T2h9hUOdh8tba9GTuDimZf+F7zCZeaaTTn0OWaMaDYmzATPglKVtGlwo7u6Mkn3d cUUdHSlfyb5nvmVb9jwgTp/y8STd7JgPZXCLQh5tbYxkMcDe1CY=
    =P/e0
    -----END PGP SIGNATURE-----

    --
    |_|O|_| Github: https://github.com/dpurgert
    |_|_|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860
    |O|O|O| Former PGP: 05CA 9A50 3F2E 1335 4DC5 4AEE 8E11 DDF3 1279 A281

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)