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So... I have been working for large, professional Controls and Integration Contractors for 14 years and even worked for an ALC dealer for a little over a year.

If I was in your position the MOST I...

I am just wondering if VPN is the exact acronym and architecture you are describing or are you more talking about a VLAN?

I have setup both using BACnet systems. VPNs are usually setup when you...

+1 for the arm bandage and the No Spell = No Trust. LOL

Funny how I decide to come back to HVAC-Talk to contribute a little bit and the first post that gets my attention is about computer modems which are so 1980s LOL

klrogers is right that AT commands...

Jay, do you have a link or can you attach a PDF of any technical manuals for that LUA programming. I am pretty good with code and have not seen that form of programming yet. Maybe even a lil...

mc g-man,

I have gotten many of these same questions asked of me... I always cringe when I hear the person use the word 'residential' in the conversation. Personally, the only 'controls' worth...

Heh... I know how to juggle, but I'm not gonna go out and find me some sharp objects or 'Lighting' to go throwin around. LOL

Facilities Management is a difficult career choice which multitasking and juggling multiple responsibilities on a daily basis is required.

Just like many other jobs ofcourse, but this video is...

Do not go forward with doing that right away... There are some other things you need to check.

If the 'other guy' has 24VAC coming from another 24VAC xfmer that is not tied, (meaning commons tied...

I am pretty sure you have some variant of BTUs per hour calculation. Here is what THAT calculation is...


BTU/HR = GPM x ΔT x 500 x SG x SH


BTU/HR ...

Sorry forgot to include a quick PDF shot of the answer... LOL

I know you guys don't need one, but it is a preview of the Excel file I will put up for download on my blog.

:bump:
Sorry guys, I totally forgot about this thread and have been meaning to post the true mathmatical formula from a spreadsheet I saved long time ago.

The name of this type of calculation...

jrick, the cooling valve is going to be told to do something... based on the image you posted and what you described on how the room it serves is used...

The chilled water valve will do one of two...

Jrick,

Answer me these questionsand I can probably diagnose your problem...

1. If you put the chw vlv in automatic... will the cooling coil temp stay at a reasonable temp like 50-55?

Yes?...

The fact he has the chw valve overriden isn't an issue, but when the air changes temperature from after the heating coil through the fan and drops 8 or 9 degrees kinda is.

There are so many HVAC...

I think Froz'nin is on the right track... but I see a TON of issues.

1. Looking at your graphics tells me that your HW valve is leaking by or your valve is not truly at 0% like it is being...

It's a mathematical formula for calculating a slope and the intersecting point. search for formulas regarding slope and intersections.

The following was filled in on the Q&A tab of the Kele page...



So it is a free download, but from where... no telling. I work for a Delta Controls Partner so we just use ORCAView and...

You mentioned something about both buildings being on the same IP network... but then there was a ? mark, so not sure what part was a question and which was a statement.

If the JACE and the other...

You just need to click on the Related Documents link...

Catalog Page
Operators Guide
Installation Guide

As a few have mentioned... The things you are looking for I think will be near impossible to find in ONE piece of equipment.

Also as Orion242 just said... Sounds like a universal nightmare or what...

Just curious, but are you saying that the percentage of the damper open is linear to the amount of CFMs coming out?

If so that isn't correct... there are many factors involved such as the static...

Those of you who have ordered these demo kits or received individual controllers... Can you PM me the price that you guys are paying for this stuff.

I have talked with one of the guys from their...

Hmmm... I guess just to make sure we are on the same page I can post up what is publicly available... SAMMC now the largest military medical facility - San Antonio Express-News


As you might...

Sac_wiz,

Depending on your ability to be able to 'play' with the air handler... Here are some things you can do to narrow down the 'why' it is fluctuating:


Place all VAV dampers (except the...