Agree with this.
Depends on how it was programmed. Each VAV should function on its own, but it should be feeding information back to the System Controllers.
My site has programs looking at...
Type: Posts; User: Gdh33
Agree with this.
Depends on how it was programmed. Each VAV should function on its own, but it should be feeding information back to the System Controllers.
My site has programs looking at...
Hopefully you have this resolved, if not this is what I know. I work in a V3 environment now but have seen some V2 panels.
The airflow settings may only be in play if the VAV box (another point)...
Still haven't touched or looked at it since June. Will give you an update soon hopefully.
Yes. I don't have the data or anyone to say that it worked ok after install. No commisioning report that I see.
Manometer reads accurately across filters. Matches multiple magnehelic gauges. Cleaning it as a last ditch effort before telling my manager we need to yank it out. Also can only see upstream and...
Not sure, but I googled it. It is a thing, but i assume this was for humidification. Just repeating what was on the AHU drawings.
Definitely. I am reviewing all data sheets.
Was...
We use city water, steam injection after heating coil 2 feet upstream of cooling coil. They also have dehumidification sprayers, though unsure if ever used as the line to them is capped.
...
Forgot to mention, as coil face looked perfectly clean, that there is a decommissioned spray type humidifier(dehumidifier?) Just before the cooling coil as well as an in use steam type humidifier in...
Thanks Lddc. I was afraid we would have to pull the coil to repair or replace. Just wanted to see if anyone else has seen something similar. Yes it is a chilled water cooling coil. Used hot water...
6 rows. Then Mist eliminator directly after coil. Also no access door between fans and mist eliminator.
I tried using a borescope through the pressure sample port, but need to find a scope...
The AHU that I am working on has a 2" wc drop across the cooling coil (rated for 0.66") and it looks great and I cleaned it anyways with no improvement. Water was clear, no dirt. I can not see the...
Was wondering about the refer trailers as well. We have a few ULT (-80C) freezers at work. Cascade system with no evap fans. Special blend of refrigerants.
Maybe use ULT freezer skids in...
I would check in my navigation tree in Orcaview or Entelliweb and click on the device and see what it is capable of. Should say something like event enrollment, just to make sure the devices can...
Google "controller tool help johnson controls" . There is a 1500 page pdf on the meanings of these. I am not a Johnson controls guy, but the information should be in that document.
Thank you John for this. Thank you 2sac for the link. I was actually going through a box of used belimos today to see if they still worked and figured there has to be an easier way.
By awesome feature, I meant just that. It is a feature and not necessarily the best or only way to do it.
Bumping this for ideas and to give an update. HVAC guy will be here next week. Would like the collective wisdom of you guys, so that way I know if HVAC guy is on the right path. Thinking of...
So each boiler is independent.
So write 5 to config AV0 constantly.
Write 0 to coils AV1 when you want the boiler off, write 1 for on.
Write rate command for firing rate.
That should be it....
Used Delta Controls. Configuration shows up as AV37 for me??? Threw me off.
Av38 is coils and AV39 is rate command. Might be different and correct for you though.
Boilers swap lead every 24...
Our chillers where upgraded a few years ago, along with new Armstrong pumps with this awesome feature. The Engineer still used dp sensors across the chiller. Maybe old school, or maybe doesn't...
Almost all our pumps are Armstrong with attached VFD, maybe 20 of them. We only use this feature on a few. But the pumps are great and the control seems good.
Just finished setting my Lochnivar boilers to be control by BacNet today. I don't have DHW hooked up to these boilers, but I think I read that 1 boiler needs to be set up as your DHW boiler. So when...
You can do anything you want in controls :grin2:, but why would anyone do this? I would do it one way or the other. Dp is the simpler standard way to do it. With more information and computing...
Totally agree that price of controls is coming down. At the same time, energy costs are going up. Even the simplest systems have some sort of control. Our one out building has sensorless...
This
I meant if it was an existing install or hard to place multiple sensors. Someone could measure with gauges at possible locations to see the range. And use the info from the one senor accordingly. ...
Think you need to locate it where you need to know the dp. Can place multiple if it is a big or complex system. Or measure at a few locations and use the one installed to represent the whole...
The valves I have dealt with, you can reverse them like you stated. But some times you have to bend the tabs on the handle, which removes the stop and you will be able to over rotate the handle.
Could be 10k type 2 or 3.
Agree on the comms thing. Would love to see that article. Think we only take total cfm and an on status or motor feedback from hood controller through comms. Not any issues that we see, worst case...
Reply for Controls_3AE
"If you have lab spaces in your research facility, are they Delta controllers as well or are they a 3rd party like Phoenix or TSI?"
All the main controllers are Delta....
Our whole research facility, around 8 buildings is all Delta controllers and Delta Controls operating system. We started with Delta more then 10 years ago, and we have no issues and good service. I...
Need to see what the tower operation manual says or individual manuals (motor, gearbox, vfd, etc.) say. I gather all the manuals for my equipment preferably in pdf format. Store it somewhere on my...
Browsing through their help area. Looks like it may be in bindings. Under expression. Then should be able to put 0.0 as the format somewhere or state it somehow.
I looked and couldn't find what you are asking. But, do you know what type of graphic it is? Dg5, svg, gpc? All of our graphics on entelliweb, accessible from entelliviz, are svg. Assuming yours...
Interested in this. Wouldn't the benefit be the energy saving from the easier cooling and moisture removal by the cooling coil? I see the "free" reheat temperature rise after the coil and think...
Our whole facility is Delta Controls. I like the products. Most of the information and documentation is in the Entelliweb or Orcaview program. Just search in the Help section of these programs and...
Like others said, need more info. Ours are dual duct (hot air mixed with cold air). Few units have a hydronic heat coil after the vav to boost heating. Dampers and valves are operated by belimo...
My post just above should read as 60 Deg C set tank temps (140 F), no lower than 50 Deg C tank temp or testing required. Couldn't find edit function for past post.
Must be that super high end ice making/storage system for low load and off peak times that I have been reading about.
Just a follow up, some returns are now pulling air. Some are not (maybe not connected?). Big thank you to everyone. Obviously more work to be done. Did a temp rise across my heat exchanger...
Our facility requires HWTs that supply showers to be set at 160 deg F. And if the tank goes below 150 F we need to do a legionella test. Otherwise the showers farthest from the tanks are tested by a...
I don't know what it is like in the NYC area, but I have worked for Power Generation companies, Ethanol Production, Steel Production, and now a Research Facility as an Operatung Engineer. Up here...
Existing rooms were converted to our main meeting room in the 1980's. Approx 30' x 40' seats 180 people. It is an indoor ahu (Sheldons 4LP-2000) that consists of a supply fan and a heating coil and...
Instructions says abs. Think they changed code just after. Was installed between 2004 and 2006. But I am no pro.
Well I will box in the two returns I found. Check the other ones that can be accessed and then check flows again. See if return equals supply.
Ah your right. I found one other joist return that was compromised because of going to dropped ceiling. But seeing as this section was the only part still drywalled, I assumed it original. Guess it...
Was hot in bedrooms, especially with doors closed. Return grilles in all rooms. But not pulling any air. Blocked off all other return grilles in house, run the fan and still barely any flow. Lots...
Much appreciated guys.
For me, it is like a hobby and interesting. Like woodworking for some people vs buying it at IKEA. Or hotrods vs buying a McLaren. Willing to spend more time and money because it is what I like. ...