40 ton air handler

[hiltontech]

We have contractors coming in tomorrow morning at 5am (yes I have to be their with them that early in the morning)to begin preparation to install a 40 ton a/h in the kitchen/cafe area of our hotel, we're scraping everything and building from the ground up, the first thing to come down is the walls surrounding the a/h that we currently have and begin to setup the beast, reason I'm excited is that i never been involved in such a project as large as this one being I deal mostly with central units, you know I installed them, repaired them slept on them, you get the idea, my engineer asked me to be hands on with the contractor to try to kinda of get an understanding to what it takes to bring one of these huge a/h to life and I'm pumped up for my job task for this coming week, the contractor who will be installing the unit knows I love learning all about the larger a/h so he's all for it, he knows I will soon begin going to school for commercial refrigeration in a few months, in fact this contractor has helped answer a lot of questions for me in ref. to
commercial refrigeration.
We did everything we could to help the kitchen workers, these ppl have been working in heat at about 80 degrees, but the 1981 a'h is just to far gone so we got the ok from corp. to install a new one..
Anyone here work on the larger a\h? and if so do you like working on them?

HiltonTech

[Jay11J]

Sounds like you are going to have fun on this! Take some pictures of this.. be fun to see this, and you'll have something to look back at.

I kinda had the same experince.. The company I used to work for, we got a bid on a hospital project, and We had the sheet metal guys do all the work on this hospital addation.. Then one day the boss asked me to go out and check the install of these air handlers.. Right off hand, I don't recall how big they were, but there was 3 large ones. Was kinda fun to see how these system really work in a hospital. One unit that was already in the build was HUGE.. You could walk in this room where all the air filters were.

Most unit had 3 stages of filter..

-Cheap fiberglass "Pre-filter" just after the outdoor air mixing box, then pleted filters before the blower.

The after the air been temper, HEPA filters box for each zone.. There was avg 8 zone out of the air handler. in the OR, another HEPA filter.

After I checked the install, I wanted to go back.. Boss had me go back and install the humidfier. Was fun doing the steam fittings.

[hiltontech]

We have a 100 ton on the roof, it stands about 8 feet tall by 10 x 8 huge a\h, this one was installed before I began wroking for this hotel, there are 15 floors, they raised it all the way up and then dropped it on the roof, it was sent up in peices being it was going into a large room and was put together inside the room.
As I said it will be an interesting week which starts tomorrow morning at 5am.


HiltonTech

[Ed Imeduc]

Have put lots of big ones in over the years . I cant see why they are going to AC for the kitchen that way ,never have . Have always use make up air units for the large and small kitchens. Where they take all outside air winter with gas or summer as evaporative coolers. Its all interlocked so like if the tstat calls for heat and the inshot burner come on all of the exhaust fans turn on at the same time with it. Anytime it calls for cool it takes the outside air and if need be the water turns on for the evaporative part of it. Any and all that have worked in kitchen set up like this like it. Its that aspiration rate of the air over the skin and you feel cool with this set up. Also you dont have to pay for AC this way . Just think for every 400cfm of exhaust fan you have it takes out 1 ton of AC on you that you paid for. Now the Restaurant part that you do need the AC for sure. But you want the kitchen exhaust to be light about 200 to 300 cfm. Thats so just a very small amount of the kitchen "SMELLS" gets over into the restaurant.

My .02 cents

ED :thinker:

[hiltontech]

Very interesting Ed, will ask a few questions tomorrow, I will try to find out exactly what will be installed, all that I was told was that it was a 40 ton a\h with out heat, cool only that was ordered and should be there by 2pm tomorrow afternoon, I know very little of these larger a\h, I plan on learning about them with this one.
Thanks for your input, brings up a few questions that may have to be brought up tomorrow, not that they will listen to me but I bet they will answer a few questions for me.

HiltonTech