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Looking for Differential Thermostat Art Todesco 01-01-2007
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Posted by Art Todesco on January 2, 2007, 3:54 pm


dpb wrote:
> Art Todesco wrote:
>> dpb wrote:
> ...
> ...
>>> Do you have any specification from the organ maker/installer/tuner on
>>> the differential required
>>> to be maintained? Has the installation been modified -- if so, would
>>> seem it would have been their job to make sure of ambient conditions
>>> (just a question so maybe you can throw the onus onto somebody else :)
>> I am the installer/builder/organist. I
>> have monitored this for the 20 years
>> since installing
>> the instrument. It is worse now because
>> of new setback thermostats in the
>> church. This was something I have
>> always wanted to do, but never had the
>> ambition. Now, it is more important
>> because of the greater temperature
>> differences.
>
> I guess the onus _did_ get shifted to the organ contractor... :)
>
> Don't suppose there's any convenient way to get a side duct run from
> off the sanctuary HVAC system?
>
> Still would seem likely that imply an on/off control and a timer for
> the routine service schedule would be adequate.
>
Well, that is another possible idea.
One of the HVAC systems is right next
to the organ chamber. I could put a
return duct in the chamber. This would
tend to suck church air through the open
shutters, thus equalizing temps. I
am currently waiting for the HVAC guy to
come back from vacation, to
discuss this with him.

Radiant Heat 468x60
Posted by on January 1, 2007, 10:56 am



Art Todesco wrote:
> I will be setting up a small fan to
> equalize temperature in 2 different
> places. This is actually in a church to
> keep the temperature of the organ
> chamber, close to the temperature of the
> church itself. The reason is to keep
> organ pipes in the 2 locations, in tune
> with each other. I have googled this,
> however, I only come up with a few fancy
> electronic units. They would probably
> work ok. But, I was wondering if anyone
> knows of a simple unit that is capable
> of switching 110 to the fan. The fan
> will be a small, 300 CFM or so unit,
> using just a few amps.
> Thanks.

Why do you think you need to control the fan? If you are blowing
'church temperature' air into the chamber, then you will equalize the
temperature. Why would you need to turn the fan off?

More detail please.

-tg


Posted by Bennett Price on January 1, 2007, 11:13 am




tgdenning@earthlink.net wrote:
> Art Todesco wrote:
>> I will be setting up a small fan to
>> equalize temperature in 2 different
>> places. This is actually in a church to
>> keep the temperature of the organ
>> chamber, close to the temperature of the
>> church itself. The reason is to keep
>> organ pipes in the 2 locations, in tune
>> with each other. I have googled this,
>> however, I only come up with a few fancy
>> electronic units. They would probably
>> work ok. But, I was wondering if anyone
>> knows of a simple unit that is capable
>> of switching 110 to the fan. The fan
>> will be a small, 300 CFM or so unit,
>> using just a few amps.
>> Thanks.
>
> Why do you think you need to control the fan? If you are blowing
> 'church temperature' air into the chamber, then you will equalize the
> temperature. Why would you need to turn the fan off?
>
> More detail please.
>
> -tg
>
Any why a differential thermostat?; why not two plain old stats set for
the same temperature, one in each pipe box.

Posted by mm on January 1, 2007, 11:12 am


wrote:

>I will be setting up a small fan to
>equalize temperature in 2 different
>places. This is actually in a church to
>keep the temperature of the organ
>chamber, close to the temperature of the
>church itself. The reason is to keep
>organ pipes in the 2 locations, in tune
>with each other. I have googled this,
>however, I only come up with a few fancy
>electronic units. They would probably
>work ok. But, I was wondering if anyone
>knows of a simple unit that is capable
>of switching 110 to the fan. The fan
>will be a small, 300 CFM or so unit,
>using just a few amps.
>Thanks.

While you're working on this, why not install the fan and whatever
means you plan to use to direct the air and keep everything quiet.
So your project will be proceeding. Any switch that can control
anything electrical can control 110 volts by means of a relay.

Maybe when you are done, you'll be able to just use a simple
thermostat in the organ room, and won't mind if the fan runs a bit
more than you would have it otherwise. After all, if it runs more
now, and when it turns off 5 minutes later than planned, it will start
again later than it would have. So you'll break even.

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