something new, to me anyway

kmjt1021

kmjt1021

Member
A Gaylord hood about year old, when the fan is shut off the damper is closed mechanically, this makes the main part of the hood inaccessible. We had to leave the power on to the fans and shut them off at the roof to keep the damper open. Once we got past that problem I found the hood reasonably accessible for cleaning compared to older model self cleaning hoods. This problem was more of an inconvenience than anything, however I don't think OSHA would think much of working with fans with the power still running to them.
Has anyone seen these hoods, and know how to open the damper after it closes?
 
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Hey Bryan, no answer on this one. But, in your post aboutyour new customer with the wood floor...if the flue was straight, why not drop your pressure hose down the flue to do the down stairs part after you finished the fans? We have several locations where my guys do this.

Karen
(not the person who actually goes out and gets dirty)
 
answer to karen question in her reply

It was a long narrow building and because we did the job in the afternoon I had to park at the opposite end from the kitchen so I did not interfere with the other businesses in the building. Running the hose through the duct would have required about 20ft more water hose than I had on the truck. A side effect of not seeing it before we went.
 
All the dampers I have seen are held open with a fusible link. Look to see if the link may have fallen out. If the there is no provison for a link, how about vise grips on the lower edge of the damper to keep it open while you are working? The links I have seen are ML, temp; about 165 to 280 degrees.

Douglas Hicks
General Fire Equipment Co of Eastern Oregon, Inc
 
Douglas, what is a ml if you dont mind....

Matt
 
The damper closed automatically when the fan is turn off, I can't even see what mechanism is closing it. The only way I could open it was turn the fan on again. It didn't snap shut like the one you are taking about, it closed slowly and would not budge until the fan was turn on. I think this is a question for the manufacture.
 
http://www.gaylordusa.com/cg3-overview.html

Here is a link to that hood, check out number 14, there is the problem. I will call next week and see what they say and let you know. Besides my current problem this is the most accessible self cleaning hood I have seen, but why do they build in the void above the inspection door, when you look into the door that void is sort of back over your head, and there is no room to get any meaningful cleaning done, you can only spray and hope it gets cleaned, you can't even see in there. I seems to me that it could simply go straight up from the inspection door, but I'm not an engineer. They at least should build in an access panel.
 
I talked to a local Gaylord rep and finally to Russ at Gaylord industries and each said they don't know Russ told me that he would check to see what other people are doing.
It sounds to me like they forgot about us in the design stages of this system. I'll keep you informed
 
Fusible links have a model designation. I.E. ML are rated for 10 to 40 # of pull, K are rated for 3 to 50 # , B are rated 3 to 20 # and A links are rated for 3 to 45 # of pull, D are rated for 1 to 8 # , a are rated 1 to 30 # and quartzoid links are rated to 250 #. I do not know the rating for the new Job links. All links are the same functional length except for the A links, which are shorter than the rest. Links are also rated for the operating temp which will vary from 135 to 500 degrees.

From the limited information on the web site, the damper probably does not have a link. Is the damper closed/held open by a motor?

Douglas Hicks
General Fire Equipment Co of Eastern Oregon, Inc
 
Yes Douglas that is apparently the case. It simply closes when the power is shut off, the operator has no choice in the matter.
 
Ok it has been almost two weeks and I finally got an answer.

They said and I quote "wedge a piece of wood in it".
The control motor for the damper has a limit switch so if it has any resistance it just shuts down. Sounds like they just never thought about it in the design stages.
 
Ya just gotta love this business!

High tech solutions don't always cure the problems!
 
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