Parking Deck Ventilation Fan Control?

[MPdesign]

I was looking at a large ventilation fan in a sidewall of a parking deck.

Does anyone know what this controller is?

The dial goes from 35 to 215.

Thank you!

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[Bryan]

It look like a line voltage temperature control thermostat.

[MPdesign]

That was my first thought but the dial goes to 215. I guess that could be because it is an "industrial control". That is a little crazy high. Is anyone sure that this is a thermostat?

I am also wondering if it could possibly be a Carbon Monoxide sensor. Alternatively if you are not sure what it is - BUT if you know it is NOT a CO sensor, please post. This should have a CO sensor but this is all that I see on it.

Built in the 80's.

Thanks

[Bill Kibbel]

It's a Honeywell aquastat with manual reset. There's an immersion sensor bulb behind it. It's usually installed to limit or regulate the temperature of boilers, but I've also seen them used in ducts in very large forced-air heating systems.

[MPdesign]

Thank you.

I thought it was - but I do not like to guess.

On another note, I am finding that carbon monoxide sensors are in the range of $1,000. This is certainly not a $1,000 device.

[hausdok]

Thank you.

I thought it was - but I do not like to guess.

On another note, I am finding that carbon monoxide sensors are in the range of $1,000. This is certainly not a $1,000 device.

Crimeny!

I didn't know Tiffany's sells CO Detectors!

ONE TEAM - ONE FIGHT!!!

Mike

[Rocon]

The below grade parking structures that I have put in all required Carbon Monoxide detectors that would start the fans and cycle them until the CO dropped to safe levels. I am only familliar with several sensors for the last 10 years or so, and this is not like the ones I have seen. Also the systems we use have an electronic control unit that ten or twenty sensors tie into, several of the structures are also zone controlled.

Did the fans cycle while you were there? You could test it (after yo verify what it is) by parking a running car next to the sensor for a while. The system I have usualy react withing 1 minute.

[MPdesign]

What did that system cost (in ballpark terms). I'm guessing about $5-8k per 150 -200 cars. Is that close?

[Rocon]

What did that system cost (in ballpark terms). I'm guessing about $5-8k per 150 -200 cars. Is that close?

The controls were probably 20K installed (the electronic controler was over 4K), not including the fans and plenums throught the PT structural deck along with the sound isolation venting through the roof on one of the buildings built over the parking structure. The parking structure has 320 parking stalls on one floor below grade into the water table.

[Jim Katen]

What did that system cost (in ballpark terms). I'm guessing about $5-8k per 150 -200 cars. Is that close?

This system was just under $80,000.

- Jim Katen, Oregon

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[MPdesign]

I see people say that this can be added, where not already in place, as an energy saving measure.

That is just misinformation...

Thank you all for being so helpful.