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They are correct the code for each piece of equipment is different, some of the VAV boxes have about 30-40 places. You should be able to download the product data sheet from the Carrier website for...

Given the ability to change the range adjustment at the stat itself, you'll probably have to write a BEST program to read the input and adjust accordingly. Alternately, the T-58 is a communicating...

Assuming you've already checked the other usual suspects (loose plugs, wires, etc), I would check for voltage between points 9 and 10 on the main low voltage block with the switch in the remote...

The electrical, water, and everything else is bad enough. I think that's a brave man in that video just looking at the structural supports under there. That looks like a collapse waiting to happen to...

SOME mental issues?? If you ask me they ALL have mental issues. How many times should I have to tell the same customer, "YES! DAMMIT! You do have to change the filters every month."? That and I may...

Really love these ones. Had a call today because their BACNet router had been offline for two weeks. Router is located in their server room. Walk in to server room, spend 20 seconds checking the...

Nope, sorry, they're all completely worthless, so feel free to mail any and all you come across straight to me. :angel:

Actually, as they are no longer made, and can be turned into the MBB for any...

Assuming you can get the XP mode installed and working (the download is about 3 GB if I remember right), you will need to have the USB key for your ComfortView, I have yet to get the parallel port...

I'm confused. It honestly looks like it would be more work to install that than it would be to just reroute the PVC water line in the first place. My former coworker was right, every time we make...

Oh boy, my personal favorite, "Did I do that?" moment was setting off a smoke detector while trying to put a cover on it so we could weld in the mechanical room. :whistle:

Ain't buyin' that halo for a minute. :grin2: I have 3 HVAC techs I've hired over the last year and each one is a bigger smarta** than the last. I'm trying to figure out if its part of the training,...

First, and I know this is a common complaint, but all would-be Mechanical Engineers should be made to spend at least two years in the field before they are allowed to hold that ever so dangerous...

Nope, the field assistant schedules are per controller and do not follow any tree structure. The i-Vu assumes you are going to create schedules by zone, unit, floor, etc. and can download one...

Distech looks interesting. The hard part is going to be convincing the spec guys to let me use them. Somehow, they are all convinced that ALC is the beginning, middle and end of everything there is...

I am currently a Carrier i-Vu dealer, but, due to a certain mechanical contractor in our area who shall remain nameless, a lot of the local engineering firms are unwilling to include Carrier in the...

A couple of different answers.
1) The VAV and VVT controllers aren't fully programmable because of the Linkage microblocks where each controller can talk to its neighbors and the master and, even...

LCW_STPT is a setpoint type point and translations sometimes go haywire on those. About 90% of Carrier chillers, we would normally write to CTRL_PNT which is the active water temperature control...

Unfortunately, the tech tools can't be downloaded, even by Carrier reps. It, and the USB converter, are part of the Tech Tools kit, part number USB-TKIT that you can purchase from your local Carrier...

You can download the most recent version of the software from hvacpartners.com or talk to your local Carrier office, they should be able to get you a copy.

Doesn't seem that strange to me, we get a lot of jobs where the engineer specs trap outside, then through curb and down into bathroom sink drain line. Just started one yesterday actually.

Ohhhhh no, they're not, they come in chill water, hot water, steam, DX, outside air, no outside air, face and bypass, on/off, modulating, variable speed, three speed, single speed, all of the above...

Apparently Carrier and Trane get their UVs from the same company. That being said, I want to know how I am supposed to sleep tonight after seeing that? I have had nightmares for years over those damn...

Check the unit type configuration. It sounds like its set for VAV operation. In that mode, the unit only performs morning warm-up and will not fire the heater again until it either goes unoccupied...

It depends on your access level. If you are not an administrator or installer, you will not be able to. If you are, try right-clicking on the unit, it should give you the option to rediscover tables....

You can sometimes find the boards for sale on ebay. After that, you'll have to find a contractor who has the tools to reprogram it, unless you're lucky enough to find one with the right program.

To this I would add, make sure its an engineer that knows kitchens. I have had several customers whose kitchen systems weren't engineered correctly and its been a complete disaster. The best ones I...

I agree that a dual-head mini-split is the best option. If he's talking about dissimilar air codes, he's probably also going to want you to block off any path to the returns for the central system...

If it doesn't leak and/or explode, who needs new? :whistle: Besides, don't they work better once they've been banged around a bit?

Go on, admit it, this is one of those weird "optical illusion" photos. :grin2: Makes me dizzy just looking at it.

Nope, the run hours can only be set at the original power on of a new or reprogrammed main board using Service Tool or ComfortView. Once the chiller has started the hours are locked and can no longer...

The only way to reset compressor run hours is to blank and reload the main board. Immediately after load and before first startup is the only time that the run hours an be written to. It will need to...

Apparently 410a doesn't damage ozone, but has a high GWP - Global Warming Potential so now they're talking that both it and R134a gotta go.

I don't have any personal experience with the VRF systems, quoted a few, but didn't get the job. That being said, every job and every climate in every area of the country has design issues that...

I think he's asking about heating setpoints, not cooling setpoints. As in, they don't want the heat to run above 55 or so. For most of those types of units, all that is built into the firmware so the...

When you say control voltage, are you checking for all options? Some of these controls use 5 vDC not 24 vAC. Get that status number I asked about earlier and it might tell us something.

I just bought a double-wide and paid extra for the upflow unit and overhead ductwork. Then, just to confuse things I told them to keep their condenser, bought my own 4+2 hydronic coil and hooked it...

All you people with your "beer can cold" sayings. I wanna know where you're buying yours. Around here, I'm lucky to get a single out of the local Shop-n-rob refrigerator at 60, let alone any colder....

The status is a number assigned to the current state of the chiller, look in the manual linked in an earlier post, gives a complete breakdown of each possible status number and what it means. It also...

If they are all simultaneous, they are probably blinking at the correct rate. Are you getting any alarms on the marquee display? If not, what is the chiller's status number?

Does anyone know where I can get the refrigerant labels for R422d? None of my local suppliers have the stickers, Honeywell says to get them from my reseller, and I can find every other type of...

Was the card factory installed in the RTU? Shutdown can be for multiple reasons, check the status of all the inputs such as smoke/fire, compressor safety, no space sensor detected, etc. Each of those...

What's the marquee showing? If all the boards are talking, all the red lights should be blinking at the same time. If not, there is a problem somewhere in the LEN. At that point, you'll probably...

Everything needs to be the same baud rate, but, as long as you don't make any mistakes, you can change the addresses, configuration, and baud rates of everything from one spot. CCN is notorious for...

I usually tell them, If you can see through it, how is it supposed to keep crud off your coils? I'm talking about those cheap blue ones you can stick your finger through without damaging.

That most likely is your problem. Depending on version it may be slightly different spots, but go disable the outdoor temperature lockout, it usually defaults to 50. That and check the other units to...

Short answer, yes you can combine them. Long answer is, it depends on what the devices are, what they're controlling, and how big the rest of your network is. The VAV/3V controllers tend to be chatty...

My first suggestion would be to get the service manual for the unit from the Carrier website, most of them are available there. The ComfortLink controls can vary a lot from model to model in their...

As a company owner, as long as someone tells me upfront about the issues, I'm willing to at least hear them out. We do a lot of work for various government institutions and they all run their own...

Quick answer, the Open controllers are primarily expecting a RS or ZS room sensor. The occupancy block is a BACnet block that holds the schedule and doesn't react to the shorting of the temp sensor...

I'm trying to figure out which of my local competitors is going around telling customers that the cheap, see-through filters from the dollar store are the best to install as they don't restrict air...