Search:

We got it to work...just need patience. Got mislead by those who said "just plug your notebook and fire up the web browser (BUI, not GUI) to look at the data points" (the point of the visit was to...

A U.S. retro-commissioning (RCx) team put in a Loytec LINX-215 Automation Server that's supporting a LON network (AHU & HW boiler). I was asked to support the Japanese "DDC techs" per a HW valve...

Other possible option is to look into the "LonIPNetwork' driver - LonTalk packets are transmitted over the Ethernet Port. The 'gotcha' is that Neuron ID is virtual which requires that the network...

The attached PDF show what happens when you run different multiples "%parent." before the .name%_%parent
and to see where it appears in the Config/Drivers tree. Attachment includes Bformat example...

The contract was awarded. The company president put out a bid - he's been doing it for over 30 years. Sometimes you win sometime you 'bite the bar'. After "17yrs" of doing DDC controls, pay...

oops..that's ASC - Application Specific Controller.

A recent batch of NWGs were sent out to those who requested it & who have posted an email address in their profile.
The latest v2.7 release has some N4 updates. A good learning game-play is to get...

Possible overseas REM (Resource Efficiency Mgr) opening up in Germany. Work at various US Army base. Need CEM certificate + HVAC/controls background is a plus. Pay is lower 6 digit + housing...

Got the HVAC mech. guys to check the strainers (they were told to check them) - after they cleaned them the pressure drop across the evap. barrel went up and the flow is back at design. Still...

The 'numbers' were changed to protect the 'innocent'. But good call.

See attached. The BAS network was not a segment of the FAA network. There could of been an VPN in force - that was
out of my 'swim lane' (doing the field P2P & s/w checkout & Cradlepoint f/w...

Another interesting option is to use a JACE and a cellular broadband router (ie, CradlePoint).

Use Nigara's BACnet 'Export Table' to share data between a BAS host and the JACE. BACnet mapping is...

Took some air-side measurement to estimate the water flow.

1) Hobo temp/Humidity loggers to determine the delta enthalpy (h) across the cooling coil.
2) VelociCalc probe to determine the supply...

Do you have a background with MEP systems? (Mechanical, Electrical Plumbing). That's essential when working with HVAC systems.
Test question: if a feedback signal is non-linear will the PID loop...

Cool! - I'm off to my plumbing store. Now I can pressure spot trend that 2nd chiller. Thanks for that PHM.
And I'll look into the strainer, etc.

Back to the ~15F temp drop across the evap....

Doing an efficiency check out on a 106Ton Carrier 30RBA110 - 10 years old.
Put in data loggers on the electrical feed and pressure sensors on the main supply & return ports (measure the evap....

If you would post your email address I'd be happy to send you my Niagara Workbench Guide (174 pgs).

The NWG is based on the Tridium courses I've taken, the Tridium User Guides (read those suckers)...

I currently work in an environment that's largely JCI territory. But, due to 'fair' gov't bidding practices other DDC manufactures are selected for building climate control. Those non-JCI DDCs are...

Basically comes down to drivers. A Niagara Station uses a network driver to fetch real-time data which are modeled with proxy points. So you've got "Field Bus" Drivers (Lonworks, BACnet, Modbus),...

When I attended the VykonPro course back in 2016 (Richmond corp. training facility), the President dropped by
for a little Q&A. I asked the same question - "What's the future?" One reply was to...

The Honeywell Grey Book suggestion by kontrophreak is spot on - find it, read it, park it in your 'controls library'.
Attached are some learning 'goodies' that U might find helpful. The block...

I might be jumping the 'gun' a bit - but these days the 'days' are moving fast and getting faster. As Admiral Hyman Rickover once said, "You must learn from the mistakes of others. You will never...

Kanes -

The best training is to read the HVAC mech & controls books and do the actual work. Sorry, but reading is one your own time. Get you hands on the Honeywell "Grey Book"- can't go wrong...

If you would post your email address in your profile I'd be happy to send you my "Niagara Workbench Guide" -
based on Tridium courses, work experiences & reading all those Tridium Guides. Very...

Another way to go is to use a Chiller assessment tool. Contact your local JCI rep. and request them to send the Yorkworks CE software (requires registration). Yorkworks CE is a suite of software....

In teaching AX Composites, I used a Lead-Lag pump example. See attached PDF.

Ambition -

I'm an ex Honeywell DDC tech. Got all the bruised 'knuckles' learning CARE + Tridium. If you'd post your email address in your profile I'd be happy to send you my 'ninga' tools - like...

This is a topic, IMHO, that sometimes be very important in regards to PM. Many moons ago, back in my Staefa days (DOS days), I was a PM on a Middle East project. Along with running (2) big jobs,...

Just curious about implementing the "Trim & Response" strategy (where you trim the static prs. setpt when all the boxes are satisfied and increase the setpoint by a xx value when one or more boxes...

Ok, I'll bite...In the "Niagara AX Kit Control Guide" you'll see a discussion on "best practice" philosophies about point & control strategy locations. See attached PDF for visual.

Philosophy A. ...

Newton's Law of Cooling says that the rate of thermal energy is proportional to the temp difference - that's seems right - like what we'd expect.

With that Energy equation (not rate), it's got the...

Another way to look at it is to start with Newton's Law of Cooling. For a flat surface:
Btu/hr = U x A x (delta T), where U = heat transfer coefficient (btu/ft2-hr-F) and A is the area (ft2)
...

Maybe there's some 'thread creep' going on (maybe just on the router talk) , but last year I got the slight 'creeps' in dealing with a system that compromised the following:
1) Plexus Altitude...

My colleagues and I have had a several discussions with the IT staff (military, "G6 folks") on the topic of "Control Manuf. Comparison". The IT staff is slowly warming up to the fact that they need...

orion -

It that your personal 'ninja lab' or the office testing lab? Yes, very cool setup. For years I've wanted to build a mini-lab for my Tridium AX improvement - see, I'm dating myself, now...

You could try contacting Alper Uzmezler - the graphic wiz.
www.bssg.com

S

Sounds good. But back to that comment about 'fouled' tubes. How much fouling does it take to really 'wreck' a dP drop across the barrel (ie, >5%). Now I've seen an AHU coiled fouled to about 50%...

I've only done a few shut off head tests, or I should say, been around when they were being done. Maybe a bit of 'black art', but hands-on experience is very important. At a pharmaceutical plant...

Determining flow from the pressure drop on the pump assumes that the impeller is correct or there's little wear.
When doing chiller system performance analysis the president of the energy company I...

Years ago I used Photoshop to created a conceptual look of how a Smartphone app would be used to view HVAC data.
Based on the 'page slide' on my iPod to locate albums and music - 'Albums' are...

10:1 turn down for an FPO? That's pretty good - maybe there's a brand out there. I'm heard that FPOs typically have a turn down between 3:1 to 5:1. A mag flow meter has a great turn down, but...

Jan 9th: 1919

Sep 1st: 9119

Sep 19th: 91919 (hey, that's my B-Day! - that won't happen 4 while)

Happy Gnu Year to all

Yes - the (2) B&G ECM pumps has the same Instance #'s - kind of weird. This is the 'tech-world' issues that energy-management and 'save the planet' wonks don't seem to acknowledge when that tout new...

Anyone familiar with ECM pumps? ECM = Electronically Communtated Motor.

On a small boiler upgrade job a B&G ECM pump was installed for the HW circulator pump (1hp).

Kind of "Star-Trek" looking...

Good reply - that's exactly what I had to do on a recent new 40T chiller install. There was a big 'bugaboo'
regarding getting good flow values between the DDC tech (on a MetaSys/JCI system) and the...

Whether or not analytics is used for improve climate control or energy-savings, it seems that good, well-designed alarms would be a more cost effective alternative to analytics. I actually search...

A bit of a late reply - did you see the "BTU Station" tread (2 below your thread)?

What did you end up doing to determine the Tons?

To get down to 'brass tacks', here's a simple but powerful example of how simple DDC controls can effect energy savings (not the front-end "BAS controls" - the working control algorithm is down in...

The situation with the 'Portable JACE Logger' is that the client does not have Workbench and does not want it and does not have staff that knows it. The client wants a simple as possible tech...