OSHA has federal and state agencies. The Laws differ but they generally follow the same regulations.
I never said they couldn't stop at my house.
I conduct OSHA 10 and 30 hours classes I think I...
Type: Posts; User: 51fitter
OSHA has federal and state agencies. The Laws differ but they generally follow the same regulations.
I never said they couldn't stop at my house.
I conduct OSHA 10 and 30 hours classes I think I...
Good question. I don't know the answer. He was a federal officer. He said if he was state OSHA he could have issued citations. He ended up handing out pamphlets to the three guys and it ended up...
Florida...ahhhh the sticky state. Good point!
Humidity would be high but if the latent heat load were bad wouldn't the return water temperature be higher also?
If it is returning with only a 4...
This regulation applies to everyone. It doesn't matter what the building and what the employee is doing. If he is on a live circuit he needs gloves.
If you tell your boss you need gloves he has to...
Why are you running the water so cold in a building full of old people? I have had buildings running fine at 48-50 degree water. That is your return temperature.
Running temps that low for comfort...
You aren't going to go back and forth with the use. I have a cooler / freezer at my school. It has two different units in it for the cooling.
There are many factors you need to consider when going...
Thank you for the links. I have the newer PowerPoint but the older one has great pictures and really shows what can happen when things go bad.
An example I can give is a three phase panel with a...
You might look at the CEE Tier 2 rebate requirements which apply to larger units. If they apply in your area. The higher EER unit may get money back.
There is no such thing as grandfathering where OSHA is involved.
"IF" OSHA comes into a historic building for example, and there is work being done it must be brought up to their safety standards....
That does seem high. The roofpak 140s have about 30 pounds per circuit not counting the condenser. add about 6 more pounds for that.
Why are you changing the oil in any unit once a year? High or low pressure?
What manufacturer recomends this? I work on Trane Carrier and Yorks and they don't.
Can you give me the link for this...
Sorry I get very uptite when fat serverroom chicks set the temps down below 70 degrees. When the surrounding building is set above this temp the units have to run harder.
68 to 72 degrees and 3 to...
APC suggests "Design conditions should be 72-75°F (22-24°C) and 35-50%
relative humidity (R.H.)."
2008 ASHRAE Environmental Guidelines for Datacom Equipment
18°C (64.4°F) to 27°C (80.6°F)
...
Do you mean SEER rating? How are they offering something under a 13 seer to you? That has been the min for over a year now.
That is a big dif in ratings. If they were close I would say Trane all the...
Why liebert? APC makes real nice units. They are the kings of hot cold isles. Using comfort cooling for a server room is a mistake. You must maintain humidity also. There are plenty of brands you can...
I knew this topic will be fun :grin2:
Nice NFPA rule being enforced and fines are being handed out to HVAC techs not wearing 500v rated gloves while testing a lives circuit over 50 volts.
That means taking meter readings on motors,...
Thank you very much ebierley,
I knew if I waited someone would actually read my ENTIRE post and give me an educated answer! I did not want a "read the instructions" answer. My question was "why"...
Perhaps you misunderstood me. I'm the instructor not the student. It is the instructions I am questioning as to why there is a rather large change.
Ok so I'm not going crazy. I found that I had to go to 3" vent pipe because of my elbows and the run to the attic area. Had this been the 95% furnace I have at the school I could have run 2" pipe...
Anyone who does not use the instructions is a fool.
I'm installing a Goodman 95% non emc 2stage furnace with a propane conversion.
I have noticed a substantial size change in the vent piping requirements from the furnaces I have installed at my...
If you set call for cooling low enough I would think both stages would go on.
Does it have any manual safeties hiding? You checked the pressure and it is gassed up? If you have no power at the...
Why are you doing so much to this unit?
If your pressures were 325 and 45 then do some work. But don't go reclaim crazy on the poor little guy.
What is your outside temp? Did you clean the...
They really aren't that important but the RTA is a Helical Rotary Chiller. The A means Air cooled condenser.
RTH is water cooled.
CVH is a centravac.
This like has a Trane list I just found...
check your airflow. A loose belt or clogged filters could drop the air going over the coil in turn the air temp will drop. This might have put you over the edge to sweating even though it's...
Check your safeties. Something is open holding it out. It's old I would see if it has gas first. Maybe it's flat. Low pressure, oil, high pressure.
Is the unit level? You might want to check that real fast also if you get back on that call. I have had units a little out of level causing them to hold more water in their trays in turn causing the...
I see a lot of tal about the drain as well as the coil temp. The drain should also be three years old. So why should it need repiping now?
Here is something to look at.
Is this a slant coil?
...
It sounds like the place has a humidity problem and this unit is doing all it can. If you see no leaks from the pan and are sure it's level and the drain is ok I would find out what the humidity is....
Does your unit have a nameplate? Most of that info is on that. What about the compressor plate? A supplyhouse might be able to give you info off of those numbers.
Need more info. Is this chilled water or dx? What is the discharge air temp? Sounds like it is set very low. Is there outside dampers? Are they wide open? Is water being pulled off the coil into the...
These are great answers from people that know their job well but I look at it this way, what the fastest educated fix I can make and do it.
You can do charts and look at drawings and everything...
ahhhh.. Waking the old girl up from her slumber. Is it a 123 maching? Or are you doing a 11-123 conversion also? Hope so, wait til they see the bill when you had to top off the charge with 400...
Nudge away at that thinking teach :) Just don't want to upset the diy site police. lol
You HAVE to know how much cfm you are pushing through those 13 seer AHUs. You are guessing without that information.
Tell them to use a clothes line. After they see your repair bill for cleaning the condenser the clothesline idea will look a lot better. If you have some sort of good barricade between the vent and...
Do it your-self help on a teardown? I thought step by step was a no-no here?
I was just wondering why you were replacing the part? Are you having oil pressure issues? Or did you get bad readings...
This is a chiller not a tire. There is no can of fix-a-flat made for large air-conditioning.
:eek:
It's a carrier, grab an A-48 and make it work :P
I'm taking three lines of my post in responce to your information. See if it sounds right to you and good luck.
If I had something that worked fine for 2 years and this year it doesn't and the tech says it is running fine then I would need a second oppnion. If the unit is just a little off on a charge then it...
I agree mad. I forgot all about the paint. Flat black on the pipe works great!
My gun looses a few degrees over 10 feet away.
It sure saves a lot of time in office buildings when you don't have to...
Who said I was ripping off insulation?
And no wondering, they were undercharged from the factory.
You must use some supper dooper electric tape if one piece insulates a refrigeration line. I use...
No Jon. Put a piece of black electrical tape around the pipe. The laser will read off of the tape surface better then the pipe. If you can scuff up the tape surface a little to kill the shine that...
Yes they are horrible on copper and brass. Wet, shiny surfaces are bad. If you want to be within a degree you have to be very close. The temp sample area expands with distance. So if you are after a...
Not to get off the topic but. Everyone here does know you can't use them on copper? yes? You won't get the same temp twice off of a bare copper line surface. I find mine at least to be very good.
Sounds interesting air. I'm going to have to get that other tool in the pic to reshape the line. I have the pinchoffs already. Never saw the need for it but there could allways be a spot for it. :)
I see. Well thanks for the info arpa. I was not aware that the pros can go inviso in here :)
There are $50 laser temperature guns and there are $400 ones. Ya get what you pay for on those...
Jon, LOL!!
I knew there had to be some bennies to being a pro! Just didn't know what they were :p