thermostat switch
Michael
AC outlet?
I have two applications in mind.
#1
I want to control temperature in small room using space heater.
#2
If one has an apartment heated by what (I think) is called gas log -
furnace-gas stove combination. The gas is electrically ignited (the
thing has AC plug). It has some sort of thermostat, there are no other
controls.
I want to set temperature accurately and be able to keep the place
cold at night and when nobody is home.
Can anybody see anything wrong with "inserting" thermostat-controlled
switch between the stove and AC outlet?
Has anybody seen such a gadget?
Thanks!
Rich Grise
Coffee timer?
Good Luck!
Rich
Spehro Pefhany
wrote:
Probably not, provided the thing is designed to be safe when powered
all the time (built in controls are not tampered with). But it's not
designed to have the power 'fail' so frequently, so it's not entirely
clear-cut that it's safe from my conservative way of thinking.
>Has anybody seen such a gadget?
>Thanks!
Nothing cheap that I can recall.
George Herold
I've seen them with outputs that could drive a relay. Would that work
for you?
George H.
PeterD
wrote:
>Does anybody make a gadget that combines programmable thermostat and
>AC outlet?
>I have two applications in mind.
>#1
>I want to control temperature in small room using space heater.
>
Yes, there are 'high voltage' programmable thermostats. Most are for
240 volts however, so a standard space heater probably won't work.
Consider an interface box with a relay, powersupply (transformer) and
a standard programmable thermostat. I've done that in the past with
A/C units.
>#2
>If one has an apartment heated by what (I think) is called gas log -
>furnace-gas stove combination. The gas is electrically ignited (the
>thing has AC plug). It has some sort of thermostat, there are no other
>controls.
>I want to set temperature accurately and be able to keep the place
>cold at night and when nobody is home.
>
>Can anybody see anything wrong with "inserting" thermostat-controlled
>switch between the stove and AC outlet?
How would this shut off the gas?
Michael
Building it is a pain (get a box, add AC-DC power supply...). I'd
rather buy than build...
>> How would this shut off the gas?
I would not think of messing with gas line ...
The stove has AC connection. I assume it opens/closes gas connection
and lights the gas up.
I would set the stove "thermostat" to warmer_than_I_need value and
control AC connection by "electronic" thermostat
Paul Hovnanian P.E.
>
> Does anybody make a gadget that combines programmable thermostat and
> AC outlet?
They make line voltage thermostats. Some are programmable. You could
wire one in series with an outlet.
Beware of those that power the t'stat timer processor by robbing a bit
of the load current. When you unplug the load, the timer loses its
settings. Or the backup battery runs down. And then the settings are
lost.
> I have two applications in mind.
> #1
> I want to control temperature in small room using space heater.
>
> #2
> If one has an apartment heated by what (I think) is called gas log -
> furnace-gas stove combination. The gas is electrically ignited (the
> thing has AC plug). It has some sort of thermostat, there are no other
> controls.
> I want to set temperature accurately and be able to keep the place
> cold at night and when nobody is home.
>
> Can anybody see anything wrong with "inserting" thermostat-controlled
> switch between the stove and AC outlet?
For an electric space heater, this would be fine.
For a gas heater, it will work but there could be some strange behavior.
Some gas appliances go through a safety start up cycle following the
supply power being restored. My furnace goes through a gas purge cycle,
which could be annoying if it happens every time the power comes on.
Check the operation of the unit under such conditions.
--
Paul Hovnanian mailto:Pa...@Hovnanian.com
------------------------------------------------------------------
Catapultam habeo. Nisi pecuniam omnem mihi dabis, ad caput tuum saxum
immane mittam. (Translation from Latin: "I have a catapult. Give me
all the money, or I will fling an enormous rock at your head.")
PeterD
wrote:
>Building it is a pain (get a box, add AC-DC power supply...). I'd
>rather buy than build...
When I did one, it was trivial, took about 15 minutes, relay, plug and
wire, and a simple transformer.
>
>>> How would this shut off the gas?
>I would not think of messing with gas line ...
>The stove has AC connection. I assume it opens/closes gas connection
>and lights the gas up.
>I would set the stove "thermostat" to warmer_than_I_need value and
>control AC connection by "electronic" thermostat
I guess I don't understand how your gas heater works. So pulling the
plug shuts it totally off? And what is the 'AC' connection?
Most gas heaters that I know of, once started, don't shut off when
they loose power.
Maybe post the name, and model numbers?