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On the thread of ice con boards. My units are 100% MUA for an old folks home. The residents can't move to quickly and the air blowing in the bed rooms can vary 11°F DAT. Not good. Works for an auto...

8Snowman8,
I'll send you a copy if you provide an email address, I couldn't find one.

There's some mention of clipping a jumper on those IceCon boards to set operation to 0-10 or 4-20, maybe...

The ICE-Con software is strictly for setting up the burner, and it's a bit flakey to boot. You'd not really want to 'link' to it with any BAS software unless you re-write everything. Too much...

I've got a site with about 3 dozen pneumatic thermostats, VAV boxes and perimeter heating valves.
In trying to sell the customer a BAS system to manage the energy costs, I've come across Millennial...

You can download the PDF of Belimo parts and match up what you think you need. You could also call Beilmo, they are popular.
D.

This is where you need your control logic to say...

I want to cool the space, with SAT, so shut the wheel off!

Do you have logic controls there? I'm not familiar with the specific model of the...

The wheel responds to the VFD signal. So what is next?
D.

I've just recently verified static pressures with a Magnahelic guage at the BAS sensor location and at the duct pickup 100 feet away. 1/4" poly.
Same pressures, but... the pickup in the duct was...

Every manufacturer writes PID controls, but they don't cross over well.

I find a UNT will want to see a I value of 600 to 1000. Or none at all for a single compressor.

D.

I know what I want to do, in English it is..

RWT=Return water temperature
Output is in milliAmps, an AO on the DX9100

If RWT is less than 72°F
Then output 7 mA.
[enables the boilers, which...

I recall this same problem on an antique Andover system about 15 years ago. Don't know the words you are using but the electronic to pneumatic pulsed transducer needs the signal sent to it every few...

I suspect the heating unit is certified with the Zelio board. From what I've seen on my sites with them, they are deeply integrated into the burner/fan functions.
To change them out would require...

I've had several sites where the rooftop unit would crap out after blowing snow. Open the panel and find it full. Lots of sparks when the tranny starts to melt the stuff.

So what I do now is in...

Paul,

Send me an email on my posted address in the user info. I can give you the cable pinout and config info for hyperterm.

D.

Regarding "Suction cut-off" , do you mean defrost termination? Pressure rises to initiate defrost termination?
D.

Have a customer who wants 39F or less in the kitchen coolers. The stat cycles based on air temp. 34 to 38. The kitchen workers often fail to close the doors properly. The air temp is up and down like...

So 77 of you good folks looked at this message and thought
...
Fill in the bank...

I'm thinking fire brick comes in rectangles. so that dictates the shape of the grill some what. My commercial...

I just bought a very friggin expensive ceramic cooker after 40 years of gas grilles that I toss out after 6 years or so due to rot.
It's a Green Egg knock off, but looking at the Primo, Kamado and...

Hey guys,

I come across 4-20 mA control systems and sometimes have to spec parts and modifications. So...

Some devices generate a carrier DC voltage, about 10 to 30 volts, and some don't. I...

I bought a Panasonic Toughbook a few years ago because it had a real serial port on it. I use that port 95% of the time on BAS/configuration setups.

Other coworkers want to get laptops too but...

I think I tried 4 or 5 nine-pin cables Mini sub D type and finally found one to work. You'll need a gender bender too.
There's some software for it with minimal help, but once you get it going, it's...

If it's a gas heating unit with one or two stages, don't try it. You can't set the temp. rise.
If it's cooling only, you'll need a new discharge air control to talk with the cooling stages and sense...

Carrier seems to have several levels of hierarchy here in Toronto Canada. Calling the parts department gets me no where. I finally spent several minutes getting shuffled through their commercial...

If this all started suddenly, then someone may have fudged the software. You've good info to release manual over rides. You can multiple levels of overides in place, good luck.
When I used to wire...

I assume you're talking about a Liebert model LEE Temp receiver on the side of the condenser. It should have two sightglasses for assessing system charge. At 10 F you should see some refrigerant in...

I serviced my first Koolant Kooler chiller today. 7.5 tons. The fluid pump overheated so badly it melted the cooling fan prop on the pump motor.

Is this a common thing or a one-up situation?
...

Thanks a lot guys, I think the situation is on the mend.

I've upped the space temp to 2 degrees above the pool water temp at 83F. It's a seniors pool.
Changed the dehum setting to 55% (from 30!)...

Check that the fan is running, the filters are clean, the return air is returning and the supply air is going out.
Really sounds like a high limit problem due to lack of air flow.

D.

As much as I've in the HVAC&R trade for over 30 years, I came across my first pool de-hum device today.

Coil was frozen and dripping water. Looks like it's a 5 ton Dectron, has a reheat coil after...

I'll have to check out Carpenter...
I've used a Palm for 10 years in the trade but my spares are dying. It's a great tool and I have a backup of everything at home on the PC for when it crashes.
I...

I agree that a Nortec-like humidifier is the best way to go.
However I had one room with a wall-mounted model (OK so far) which had an internal fan which blew the humidity into the room. And then...

I've installed about 2 dozen of these Dual P66s on some old Liebert condensers. The highest pressure from either circuit will speed up the single phase fan motor. Be sure to read and understand page...

So I tried to backup the FX40 at a site and this error message came up.

FX40 backup failed, java.lang.ClassCastException

I've done it about 4 times in the past year without problems. I'm lost...

I have a site with a yellow message box coming up in the browser window when I connect to the FX40 regardless of which front end I use.

"Station running low on disk space."

I suspect the...

I've come across a small manufacturing plant with 3 Distech controls dated 2002.

1/ ECU88c, 2/ EC88b.

The needs are modest, and the system is working fine except for an incident this past...

It's sad to say that many manufacturers disagree on how a PID is calculated. The end results are pretty similar, but the terminology and calc methods vary a lot. Something you have to live with in...

I've had some Carrier MotoMasters ( a related product) fail from heat and low voltage. The aluminum slab on the back has to be ventilated. I'll sometimes drill a hole in the condenser box to allow...

Have a VAV site with multiple rooftop units. With a lot of trouble got Rover and couldn't make it work. Finally got into the system with Hyperterm, free on every PC.
Don't ask for more than what...

I think it's page six in the instructions that says the 24 volt supply to the P66 must be on the same 2 legs as the motor itself. Otherwise, it works poorly or not at all. Easy fix. Usually it...

A flow switch may not work if unit's off when flow is lost. Then there's just no flow of water.
The water reg. valve closes tight.

A differential pressure switch may be the way to go. The unit...

I've serviced the same 2 module, 100 ton Multistack since 1995. It's run non-stop, and then with a fair bit of cycling for the duration. Replaced a lot of contactors and 4 Bristol compressors. That...

I've got two small Lieberts in a server room. BU046WGBAEI 3702, N08A740222.

Sometimes the base building will shut off the water supply to them without warning and they trip off on high head. ...

Joey,

Thanks for the info, it'll help.

D.

Turns out if one pin on the phone jack is bad, you can't talk to the master panel but it's fine with the roof-top unit panels.

New cable fixed the problem and all comm has been established.
Does...

Some monitors can be tilted 90 degrees and still work fine. They a built-in hinge. Those models are used just for the kind of work you want to do. Landscape or portrait, you call it.


D'Laine

Like I said, towers cool chiller water. I have a few sites where I've cut the BAS out of the tower's VFD and placed Carrier's Chiller in control of the tower.
Maybe BAS's know what the chiller...

Yeah, years ago I had a batch of Carrier chillers which leaked from the compressor to the condenser, and from the compressor to the chiller barrel.

Ruthless use of clamps and vibe absorbers...

We seem to come across a lot of older DX9100, UNT, VAV and such controllers, working in the field, but just barely. The hardware is pretty solid, but the contractors are long gone with no or very...

I don't know why Carrier is the only one to use these plugs, but they do. Yeah, I've found many leaking.
Depending on your local refrigeration codes, I'd just seal the plug hole with a brass...

Basic British engineering. Micro chips, British alternators and such run on smoke. When the the smoke leaks out, they stop. Bummer.

Try Liebert in Ohio, USA , call 800.543.2778 for the Tech...