Search:

I think we need to start a thread about capacitor failure. I used to see problems with contactors, burned wires, bad thermostats, dirty coils etc. Now days I don't check anything else unit I have...

That is in a table at the back of the NEC. No joke.

Pretty sure it is out of warranty. I just found the receipt - April 2015. Look out 550 - here I come.

I got my Testo 550 about 3 years ago. Loved it when I got it. Then the liquid valve started leaking all over my hand. I ordered the repair kit. By the time the repair kit arrived - they valve was not...

I could have paid more attention to what the symptoms were telling me. I saw what I thought was a dirty coil (SH & SC wrong). And I could have jumped on fixing the refrigerant leak when it first...

817035

So this AC is on one of my rent properties. I installed this coil about 15 years ago. I can't blame any one else. This one is 100% on me. The past year or two it has developed a leak - R22...

I was working at a defense contractor building until late one night. Apparently I left my lights on when I arrived in the day time. By now the battery was dead. I walked back into the front desk and...

My experience is somewhere in the 40 to 60% airflow range. I would round both of those to 50%. But most TAB is roughly +/- 10%.

I do a LOT of CX. That is why my handle is CXagent.

Do I know as much at the TAB, GC or Controls guys? On each job I probably do not know as much as the ones who installed and lived with making it...

CX = Commissioning.

Some good points here. I especially agree with Wayne - your integrity is everything. Defend it like your life depended on it. Ok - so only your livelihood depends on it.
...

That picture from napolean-dynomite looks a lot like this one.

812514

Yes - those are the return ducts that "should" be connected to the that filter grill.

Carrier knockouts - don't.

That is my experience with Carrier knockouts. I now carry a hole saw to solve this problem. And I make sure to create all the holes I need for the entire installation...

What an idiot!!! I would NEVER do things like that.

Oh wait - I have. And too many times to remember all of them. Actually, I have to go back today to finish what I didn't finish at 8:00 PM on...

Everybody is entitled to their own opinion.

I never installed surge suppressors when the controls were all relays/contactors. Even if I had to replace all the controls it was cheaper than a surge...

First the right answer - do a load calculation and air flow balancing. That will take a REALLY good tech or a good engineer. Both are in short supply.

Now for a usable answer - balance the air...

Dad - Help!!!

I changed my email address and seem to be locked out of the Pro Forum. Can you fix me up again? I need to post a question and wanted to put in the Pro Commercial area.

beenthere - Windings to ground showed open on all three wires.

PCP - I plan to repair the module and reinstall it. It will be a little over a month before I can get to it.

Here is a quick update.
1) Wife called griping about heat not working.
2) Drop everything to get parts. I'm still thinking it is just the module but the resistance readings both me.
3) At the...

Short the meter leads together and I get 0.1 ohms steady.

Blower wheel and motor mounts are good.

Core_d The motor and magnets generating a voltage was what I thought was happening.

Beenthere has your answer.

In my experience if a system will hold a 200+psi pressure test but shows a leak under vacuum you have one of two problems. 1) moisture left in the system to remove...

I would guess that the connecting rod failed first. The piston and everything else was damaged after the rod broke.

As far as liquid causing the rod to break - maybe. I have seen a lot of...

I need some opinions here. MY furnace blower quit tonight. Carrier model 58CVA110 Shows a blower fault. Sure enough the blower rocks but never turns. I pulled the blower out expecting it to be a...

We used to do that. But someone knocked a 'dummy t/stat' off the wall once and found there were no wires connected to it. So we started hooking wires to them and run the wires to above the ceiling....

This sounds like an intermittent open on the limit circuit. I would suggest jumpering around the limit circuit but it sounds like you already have. So I would look VERY closely at the connector...

So which brand do you buy - Chevy or Ford? At least those are built and testing in a factory before they are sent to the customer. A split system is assembled and run for the first time at your...

This used to be what most techs thought. But since the residential code started requiring duct leak test in 2009 - you need a way to test or you have to hire a 3rd party to do the tests. Most...

I haven't been back on here in a while and I just say the responses since my last post. We think we have this one solved. I won't go thru all we did, but it was a mess. As said above the RTU was...

Thanks for the info.

I just downloaded some data logs on three of the RTUs. The OA damper never closes. The blowers never turn off. On two of the units one compressor is running continuously...

I have seen things like this. Usually it is due to a failed duct leak test. The installer is sure his ducts aren't leaking so he seals everything else up to "prove" his ducts weren't the leak. ...

Model YHD150F3RLB0E0F Serial 143011092D And there are 4 more RTU of different sizes.

It is a newer RTRM board with the CTI built in. It has a conventional 2-stage programmable thermostat hooked...

You must be as old or older than I am.

I found the Reliatel Control book. Page 46 and 47 seem to confirm what I was seeing / thinking about the conventional t/stat control.

I need some help understanding what the Trane Voyager controls do when a conventional thermostat is used to control the unit.

I have looked up the Trane "black book" and read thru it. My...

Thanks for the link @jayguy. That is just what I was looking for.

I just saw this because I'm looking for something similar but 20 tons. For humid areas like Austin make absolutely sure you use enthalpy control. Dry bulb control will make the space extremely...

I saw the 550 advertised for what I thought was a great price and ordered it. I looked on line and there was a 4 valve manifold but it didn't offer some of the features I wanted (like blue tooth...

I used to replace the gaskets when they leaked or looked like they might leak. Then I was working on a roof when it rained on me while I was charging a unit (about 1978 or so). I saw all kinds of...

You didn't post enough info to say for certain but I bet the root problem still exists. If I were to take a wild guess I would say that the super heat on that system was about zero and you were...

Thanks Rundawg! Yes that exactly what I had found and was coming back to post. I had not found that Sustainable Coils might be able to help me. I had resigned myself to starting early one morning...

I usually agree with PHM - but not this time. A piston compressor will rarely equalize thru the compressor because the reed valves prevent reverse flow. If the system can't equalize thru the...

I have replaced 1 X13 motor this year (only one I have installed in the past several years) and 2 ECM motors. Two of the three replacements were right after a thunderstorm so I suspect electrical...

I found a leaking coil on a Rheem system (furnace & condenser). The nameplate was barely readable but clearly was not a Rheem coil. Can someone identify the manufacturer?

Coil model number...

Posted resolution in Pro Forum.

DCs601C71 Manuals at http://www.daikinac.com/content/commercial/accessories-and-controllers/intelligent-touch-controller-dcs601c71/ There is no 'other' front end.

I have been digging thru those...

I read about those in the old Doolin Troubleshooting Bible (mine was about a 1970's version). I had never actually seen one though. I recently (2005) ran across a could of them on a museum. They...

I thought most of the very old refrigeration rack systems were a kind of VRF system. Those that ran a compressor to charge a liquid receiver and then cycled off the compressor. Then the...

I checked the Advanced menu but wasn't able to change it there. You may have hit on the problem. Is there something I need to do to make the factory default inactive?

I have what should be a simple problem that I can't find an answer. On a Daikin iTouch system I need to raise the heating set point to 70. Currently it is limited to 68 by the controller. I can't...

Do you have similar pictures on flex duct systems?