If it is new construction, then the plans would include the ESP the engineer designed the duct around. If it is a replacement unit and you did the P&M work over the years, you would know the ESP of the duct system from your previous service records when you measured it. Or if the old unit's fan was still operational, you could measure ESP before replacing the unit. However, if it is a replacement project and by the time you got involved in the project the old fan was no longer operational, then you would have to take an educated guess to start and then adjust as needed. It would be just like with a belt drive fan in that situation... you would need to set the pulleys for something (anything) and then adjust for more or less CFM as needed.
My company installed dozens of these and have a lot of problems, these units are designed to overcome 1inch of total external static and the majority of duct installations are not perfect. Total external static is always over 1 inch.
We have used well over a hundred of these and have had no such airflow issues. In fact, our field techs are reporting back to us that setting the system with the air balancers for proper CFM is easier than with past designs. In our market (Chicago), we have found the average ESP for 3-5 ton units is around 0.8 inches and seldom over 1.0, but every market is different in terms of the quality of the duct design and installation. In either case, please keep in mind that these units, like previous Carrier/Bryant RTUs, can be ordered with standard, medium, and high static options. You need to look at the CFM vs. static tables for each model in the product data book to make sure you order the correct model for your application. Take a look at carrier.hvacpartners.com/products/detail/48FC
Manual reset limit trips and opens control voltage,leaving customer with no heat. I noticed Carrier has a service bulletin about this issue because of all the complaints. They want auto reset limit as replacement, then control board starts blower few seconds sooner everytime it trips to stop problem.
We also experienced this issue on a few projects in early fall of the first heating season. Our local tech support advisors have addressed this with the installers and it now seems to be in the past.
Our customers have already installed nearly 300 of these in the Chicago area and we have not heard of any issues at any of the start-ups. Oops... we better find some wood to knock on because we just jinxed ourselves. :)
@@TECTubefilms I understand and agree with the belts, pulleys and etc. What is going to cause problems in my opinion is the people who will complain about "how can I know my expected static pressure" I can already hear it now. The technology its self is probably just fine knock on wood!
@@tylerbrewer3163 The discussion of ESP and CFM does not change with the switch from belt driven to vane axial. If in the past you were guessing at static and making assumptions about needed airflow, you could still do the same now. If you normally just used the "factory default" airflow, you could also continue doing it that way. Or... with vane axial or belt driven... you could calculate or measure the ESP and you could calculate the room loads to determine CFM. That 3rd choice is obviously the best way to engineer the system and set it up, but you do what you gotta do.
If have used several hundred of these locally in the Chicago area with very few high limit trip problems. There was an issue with the high limit switches in the early versions. Carrier issued a bulletin on how to address it in the field over a year ago and has since changed the type of switch and its wiring in production. What serial number range was the unit you were working on? What was the ESP?
I just install a 10 ton of these, it is my first experience with this ecoblue I really regret it.i set up the requirement cfm,it seems it was still to low cause that unit condensate so much ad drop a river inside of the building,I rise the fan speed a little bit now the board went bad, when go to the store to grab one they don't have it, they told me it will take 140 days to receive the board. That unit make me look very bad I understand something can happen but how come they put a product ou for us as contractor and for our customers with no parts available? when we here carrier we should feel that we are in good hand but it is reverse.now I think I will have to buy another brand to reinstall for the customer because it is so hot here in Florida they can't wait regarding this experience that piece of need to get off our face
We are not clear on most of the things you are saying/asking in this post. We can comment that parts availability is dependent on your local distributor and what they are stocking.
What dumb panels? Are you talking about the RTU cabinet itself? Believe it or not, you can order these units (and the older style ones) with hinged panels. Contractors usually decline that option, though. We need more construction departments and service departments to actually start talking to each other. LOL
How are we to know what the predicted static pressure is. I’m about to set two of these tomorrow.
If it is new construction, then the plans would include the ESP the engineer designed the duct around.
If it is a replacement unit and you did the P&M work over the years, you would know the ESP of the duct system from your previous service records when you measured it. Or if the old unit's fan was still operational, you could measure ESP before replacing the unit.
However, if it is a replacement project and by the time you got involved in the project the old fan was no longer operational, then you would have to take an educated guess to start and then adjust as needed. It would be just like with a belt drive fan in that situation... you would need to set the pulleys for something (anything) and then adjust for more or less CFM as needed.
My company installed dozens of these and have a lot of problems, these units are designed to overcome 1inch of total external static and the majority of duct installations are not perfect. Total external static is always over 1 inch.
We have used well over a hundred of these and have had no such airflow issues. In fact, our field techs are reporting back to us that setting the system with the air balancers for proper CFM is easier than with past designs. In our market (Chicago), we have found the average ESP for 3-5 ton units is around 0.8 inches and seldom over 1.0, but every market is different in terms of the quality of the duct design and installation. In either case, please keep in mind that these units, like previous Carrier/Bryant RTUs, can be ordered with standard, medium, and high static options. You need to look at the CFM vs. static tables for each model in the product data book to make sure you order the correct model for your application. Take a look at carrier.hvacpartners.com/products/detail/48FC
@@TECTubefilms Good information,thanks
Manual reset limit trips and opens control voltage,leaving customer with no heat. I noticed Carrier has a service bulletin about this issue because of all the complaints. They want auto reset limit as replacement, then control board starts blower few seconds sooner everytime it trips to stop problem.
We also experienced this issue on a few projects in early fall of the first heating season. Our local tech support advisors have addressed this with the installers and it now seems to be in the past.
This is going to cause problems...
Can you be more specific? It seems like there would be less problems such as no broken belts, no mis-aligned pulleys, etc.
Our customers have already installed nearly 300 of these in the Chicago area and we have not heard of any issues at any of the start-ups. Oops... we better find some wood to knock on because we just jinxed ourselves. :)
@@TECTubefilms I understand and agree with the belts, pulleys and etc. What is going to cause problems in my opinion is the people who will complain about "how can I know my expected static pressure" I can already hear it now. The technology its self is probably just fine knock on wood!
@@tylerbrewer3163 How do they set the airflow on belt driven units today without knowing the ESP and desired CFM?
@@tylerbrewer3163 The discussion of ESP and CFM does not change with the switch from belt driven to vane axial. If in the past you were guessing at static and making assumptions about needed airflow, you could still do the same now. If you normally just used the "factory default" airflow, you could also continue doing it that way. Or... with vane axial or belt driven... you could calculate or measure the ESP and you could calculate the room loads to determine CFM. That 3rd choice is obviously the best way to engineer the system and set it up, but you do what you gotta do.
The blower fan is too close to the heat exchanger which is causing it to overheat and shut down! Come on carrier, you fucked up; now own up to it!
If have used several hundred of these locally in the Chicago area with very few high limit trip problems. There was an issue with the high limit switches in the early versions. Carrier issued a bulletin on how to address it in the field over a year ago and has since changed the type of switch and its wiring in production. What serial number range was the unit you were working on? What was the ESP?
I just install a 10 ton of these, it is my first experience with this ecoblue I really regret it.i set up the requirement cfm,it seems it was still to low cause that unit condensate so much ad drop a river inside of the building,I rise the fan speed a little bit now the board went bad, when go to the store to grab one they don't have it, they told me it will take 140 days to receive the board.
That unit make me look very bad I understand something can happen but how come they put a product ou for us as contractor and for our customers with no parts available?
when we here carrier we should feel that we are in good hand but it is reverse.now I think I will have to buy another brand to reinstall for the customer because it is so hot here in Florida
they can't wait regarding this experience that piece of need to get off our face
We are not clear on most of the things you are saying/asking in this post. We can comment that parts availability is dependent on your local distributor and what they are stocking.
They never changed those dumb panels
What dumb panels? Are you talking about the RTU cabinet itself? Believe it or not, you can order these units (and the older style ones) with hinged panels. Contractors usually decline that option, though. We need more construction departments and service departments to actually start talking to each other. LOL
Check out this video which happens to have a unit with hinged access panels. ruclips.net/video/GxXvWUNXp3c/видео.html