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Old 03-29-2018, 07:41 PM
Drew Hine Drew Hine is offline
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Timer Switch for main shop blower

Hello, I am wondering if anyone has any information about installing a timer for my main shop blower? I am running a hub furnace with a variable speed blower which controls itself. I have two glory holes hooked up to a large Spencer blower, 15amp 220 volts.

When I am done blowing for the day I try to keep my main glory hole blower running for at least an hour and a half. After that I shut down the blower to save on energy costs. As time is becoming more valuable, I would rather just leave the shop and go home and finish up other jobs. Is there a way to wire a timer onto my motor starter to turn off the blower after I leave??
any help would be much appreciated!
Thanks
Drew Hine
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Old 03-29-2018, 07:50 PM
Dan Vanantwerp Dan Vanantwerp is offline
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If you can wire the proper prong configuration this looks just about perfect:

https://www.amazon.com/dp/B002YPNGZU...a-316081600057
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Old 03-29-2018, 11:50 PM
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Sky Campbell Sky Campbell is offline
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Another option is a hot water heater timer.
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Old 03-30-2018, 07:19 AM
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Pete VanderLaan Pete VanderLaan is offline
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Are you doing that to heat the building?
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Old 03-30-2018, 08:03 AM
Eben Horton Eben Horton is online now
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Quote:
Originally Posted by Pete VanderLaan View Post
Are you doing that to heat the building?
I leave my glory hole air on 24-7. My logic is that my ribbon burner will turn into a flue if I turn off the air when I shut the hole down at the end of the day.
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Old 03-30-2018, 09:22 AM
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Do you have any evidence supporting that theory? I have my doubts. In winter I do leave the door open to allow radiant heat into the room. In summer, I don't. I certainly think that crashing the gloryhole temperature would be hard on the gloryhole as well as the burner.
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Old 03-30-2018, 12:02 PM
Eben Horton Eben Horton is online now
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My burner is 20 years old and is like brand new. As far as proof, I suppose I could shut off the air and feel how hot the airline gets.
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Old 03-30-2018, 01:00 PM
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I think it's worth trying. One of the things that I've exposed myself to over the decades is noise. Now, I live in this funny little world where I can't hear anything subtle at all. I didn't know our waterfall makes noise. I use two 6K hearing aids and love them as a connection to life. I have microphones hooked to the TV that amplify the sound directly into my ears. It's all from Glass noise and fire engine noise. I don't like to talk on the phone since it's such an effort.

Blowers are noisy.
Any noise you can reduce in the studio is worth reducing. Protect your ears. Really.
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Old 03-30-2018, 06:48 PM
Josh Bernbaum Josh Bernbaum is offline
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I hope that's not one of those big Eclipse 240v ones Eben.

This is what I have on mine Drew (under wall-mount timer switches). I like to
run the air for an hour after finish using the hole just to cool down my recuperator parts:

https://www.mcmaster.com/#timer-switches/=1c78mfw
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Old 03-30-2018, 07:35 PM
Eben Horton Eben Horton is online now
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Hey josh,
Yes it is, but i am going to set up a variable speed blower at the new studio.
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Old 03-31-2018, 09:25 AM
Patrick Casanova Patrick Casanova is offline
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Like Eben, I've had the Tom Ash ribbon burner in my GH for 24 years and it looks like new. I believe it was Tom who told me to never shut the air off until the GH was cold to keep the burner face from getting hot. I always leave air blowing through it. I fire with natural gas and I have a variable speed control on the pressure blower running my combustion air manifold. At the end of blowing I turn the blower speed down to the level necessary to maintain the desired pressure for my furnace idle, reducing the GH from 6" of pressure to 1.5". For me the variable speed cut my electricity bill noticeably from day one.
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Old 03-31-2018, 11:50 AM
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well, that makes a good deal of sense. I'm not sure of what to think about the recuperator explanation though. Charlie Correll makes those burners now, I'll ask him his take on it.
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Old 03-31-2018, 12:29 PM
Eben Horton Eben Horton is online now
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I also do this to keep the pipes happy. Heating and cooling makes condensation no? Rust is a huge issue where I am being 1 mile from the ocean.
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Old 03-31-2018, 02:56 PM
Josh Bernbaum Josh Bernbaum is offline
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Quote:
Originally Posted by Pete VanderLaan View Post
well, that makes a good deal of sense. I'm not sure of what to think about the recuperator explanation though. Charlie Correll makes those burners now, I'll ask him his take on it.
For cooling the stainless part so it doesn't wear prematurely from residual heat coming off the hot castings below it and still hot gasses coming up out of the recently turned off GH. I think the thinking is that there is ample air coming in while the thing is hot, enough to prevent the stainless from overheating and then the extra cold air coming in after shutting the gas off helps it to stay cooler.
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Last edited by Josh Bernbaum; 03-31-2018 at 05:09 PM.
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Old 03-31-2018, 03:43 PM
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I can see a short time. I can't see continuous running. My electricity is really expensive here now. It's why I dumped the moly. I do miss the safety of it but gas makes such nicer color. Our copper ruby is back to being the best again. Rust is a major pain here as well. I left my steel out in the weather in Santa Fe.
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Old 03-31-2018, 06:25 PM
Eben Horton Eben Horton is online now
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I have the old school 240 amp blower that power supply my furnace and glory hole so it doesn’t cost me a dime extra to leave the air valve open all night long. I do however plan to convert the furnace to a variable speed blower. When that happens I will probably retire the eclipse beast or use it for cooling air above my bench and glory holes.
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