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thermostat that reduces on/off switching frequency?

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thermostat that reduces on/off switching frequency? peter 12-26-2007
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Posted by JoeSpareBedroom on December 26, 2007, 11:24 pm
>I have a thermostat/furnace combination that results in a hyper system --
>sometimes the furnace turns on for a minute or less, turns off for a minute
>or less, etc. This gets annoying.
>
> I would like to reduce the frequency of switching on and off. In other
> words, if it turns on, stay on longer. When it turns off, stay off longer.
> This may results in more temperature fluctuation, which is ok.
>
> So, is there a thermostat that allows me to control either: minimum on/off
> duration or the on-temperature and off-temperature independently?
>
> My temporary hack is to cover the thermostat with a box. This delays the
> temperature change at the thermostat and lengthens the on/off cycle
> duration. But I'd rather not have a box on the thermostat.
>
> The current thermostat is a honeywell low voltage system, bought some 10
> years ago.
>


Has it always behaved this way during the 10 years you've owned it, or is
this a new symptom?



Electric Radiant Heat 468x60
Posted by Joseph Meehan on December 27, 2007, 9:06 am
Do you still have the instructions. If so it should tell you how to
adjust it. It may be called an anticipator. Of course also check for
those open holes and possible malfunction or a bad location, like just above
a vent.

> I have a thermostat/furnace combination that results in a hyper system --
> sometimes the furnace turns on for a minute or less, turns off for a
> minute or less, etc. This gets annoying.
>
> I would like to reduce the frequency of switching on and off. In other
> words, if it turns on, stay on longer. When it turns off, stay off longer.
> This may results in more temperature fluctuation, which is ok.
>
> So, is there a thermostat that allows me to control either: minimum on/off
> duration or the on-temperature and off-temperature independently?
>
> My temporary hack is to cover the thermostat with a box. This delays the
> temperature change at the thermostat and lengthens the on/off cycle
> duration. But I'd rather not have a box on the thermostat.
>
> The current thermostat is a honeywell low voltage system, bought some 10
> years ago.
>


--
Joseph Meehan

Dia 's Muire duit




Posted by harlen on December 27, 2007, 10:40 am

> Do you still have the instructions. If so it should tell you how to
> adjust it. It may be called an anticipator. Of course also check for
> those open holes and possible malfunction or a bad location, like just
> above a vent.
>

Hello,

Can you name a manufacture and model number of a thermostat that has this
feature? My application is for a gas 2-stage furnace. I either want to
control the temperature limits or length of time between furnace cycling
on/off.

Thanks -

>> I have a thermostat/furnace combination that results in a hyper system --
>> sometimes the furnace turns on for a minute or less, turns off for a
>> minute or less, etc. This gets annoying.
>>
>> I would like to reduce the frequency of switching on and off. In other
>> words, if it turns on, stay on longer. When it turns off, stay off
>> longer. This may results in more temperature fluctuation, which is ok.
>>
>> So, is there a thermostat that allows me to control either: minimum
>> on/off duration or the on-temperature and off-temperature independently?
>>
>> My temporary hack is to cover the thermostat with a box. This delays the
>> temperature change at the thermostat and lengthens the on/off cycle
>> duration. But I'd rather not have a box on the thermostat.
>>
>> The current thermostat is a honeywell low voltage system, bought some 10
>> years ago.
>>
>
>
> --
> Joseph Meehan
>
> Dia 's Muire duit
>
>
>



Posted by JoeSpareBedroom on December 27, 2007, 10:46 am
>
>> Do you still have the instructions. If so it should tell you how to
>> adjust it. It may be called an anticipator. Of course also check for
>> those open holes and possible malfunction or a bad location, like just
>> above a vent.
>>
>
> Hello,
>
> Can you name a manufacture and model number of a thermostat that has this
> feature? My application is for a gas 2-stage furnace. I either want to
> control the temperature limits or length of time between furnace cycling
> on/off.
>
> Thanks -


Got a heating contractor you use sometimes? They may have the information
you seek.



Posted by Joseph Meehan on December 27, 2007, 1:48 pm
>
>> Do you still have the instructions. If so it should tell you how to
>> adjust it. It may be called an anticipator. Of course also check for
>> those open holes and possible malfunction or a bad location, like just
>> above a vent.
>>
>
> Hello,
>
> Can you name a manufacture and model number of a thermostat that has this
> feature? My application is for a gas 2-stage furnace. I either want to
> control the temperature limits or length of time between furnace cycling
> on/off.
>
> Thanks -
>

I believe most manufacturers consider it an adjustment, not a feature,
so the only place you will find it is in the owner's manual.

If you check the owner's manual for your current stat, you might find it
is there. I have no experience with two stage units so my comments may not
apply.


--
Joseph Meehan

Dia 's Muire duit




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