How's your air flow whats your total system static at? Do you have the correct orifice? Can Air flow be bouncing and blowing condensate off the coil? I did not use nitrogen during welding, but did do a full nitro flush and vacuumed to 400 microns. It's an old farm house that still supplies from the inside and returns from the outside. Are we talking down the middle of the furnace or up front where the gas valve is? If the coil is good then not likely. Is the bulb properly secured to the suction line? I have not heard of any widespread reliability or manufacturing line issues related to the Trane all-aluminum coils. All Lennox product is set up with a systematic coding system for both model numbers and serial numbers.
These were the various reasons given to us: 1. If contractor quoted you a Trane, he should have informed you of the change before money changed hands or installation begins. I am thinking at this point faulty metering device, but would like to convince them on considering a matching keeprite evap coil. I've charged the unit to 10'F subcooling as stated on the condenser rating plate, but my suction side was showing low pressures and temps. Note: When the coding system was originated for condensing units, the numerals after the da sh represented the maximum Btuh cooling capacity. On residential gas and oil furnaces this identification plate is located on the inside of cabinet near the vestibule panel.
What furnace do you have attached to this? I went out tonight on a service call. I assume this is in a closet or up flow. Another thing I noticed is that the Acoil is installed maybe a couple inches from the top of the plenum. Each unit manufactured is a duplication of a particular model. Unit model number including any dash numbers and serial number must always be used when referring a problem to Lennox in regard to repair parts, literature, wiring diagrams, etc. The warranty only offers me some consolation because I know that even if the parts are covered the labor may be costly to repair the coil.
All aluminum Trane coils are working out great. I lowered the fan speed one speed. If your comment is not related, it will be deleted. Multiple hvac contractors have told us our plenum was too short with our previous coil and the trane coil would be even taller than the one that was there before. Best reason to use them is 4. It certainly should be a habit that needs to be dropped weather it was the cause of failure only one way to find out. Its not on the outside,its on the inside.
I upped the subcooling to 15 just to see how the system would react. Now some coils that have been chemically cleaned alot can lose their 'slickness' and water can drop off before it rolls into the pan. Unfortunately it's a holiday today or I would do it now. I'm still furious at the installer that I was deceived and plan to make that known. I would prefer the Trane coil. And this turned out to be the final decider for us.
When Trane switched to aluminum for their evaporator coils, they encountered a lot of quality control problems that have yet to be resolved. Which of the above claims, if any, are true? Trane, Goodman, Carrier, Rheem, etc. You can find the rules for posting and qualifications. Trane coils are a few inches larger. You may have something plugging the strainer.
Damaged fins on the coil can also cause problems. You may ask a question by starting a new thread. Both come with identical warranties 1 year labor, 10 years parts. As for static pressure , I don't have any diagnostic tools to test that unfortunately. The sequence of letters and digits in the Lennox model number reflects specific information about the unit. I am concerned about my lapse of judgement on the nitrogen during brazing.
The Trane coils are not currently available due to manufacturing line issues related to 1 above. Did you wrap wet rags around the liquid line when your brazed? Anybody have any ideas or suggestions? Use of proper unit identification numbers and serial numbers will greatly help in expediting any material required for these products. Trane tests their coils in the lab. Insulation is bonded better to panel. I would be looking for lose insulation or bad pan. The contractor's bid clearly stated that the evaporator coil was also manufactured by Trane. If water is dropping down on the furnace from the inside then most likely a pan problem if the coil is someone knew.
I have a Keeprite furnace attached to it. Edit 1 - Thanks for all the help guys. The industry has moved away from copper coils to the aluminum. I would highly recommend picking up a manometer so you can test the entire system as a whole when diagnosing issues, even if you went inexpensive and bought a single pressure manometer you could do differential in your head and still be able to check gas pressure as well when you run into gas valve problems. It should start sweating after the piston or metering device. All this and much more is available to you absolutely free when you ; for an account, so today! If the water is sweating on the outer cover and going down the side of the furnace then its an insulation problem.