System over heating the set point

the Best HVAC

• 18 de diciembre de 2023 06:05

New install of (2) ADUH12LUAS1 indoor slim duct units with (1) AOU24RLXFZ outdoor unit. I have the fan set on Auto and the system set to heat. It seems to keep running at about 50% capacity full time. The controller is UTY-RNRUZ5 with Function 42 & 48 set to 01. Any idea what is going on? I will call tech support in the morning and if I get an answer I will post the response here to hopefully help others. I have installed about a dozen of these systems and have never seen this before.

0

• 

  Blue Line Heating and Air

  • 5 de enero de 2024 18:26

  Any update? Looks like the 42 and 48 are correct. Would just verify that the RC Sensor is set to USED and the static pressure FUnction code 26 is set at something closer 09 if ducted and not the default 31.

  1
• 

  the Best HVAC

  • 5 de enero de 2024 18:39

  No, have not been able to get back there yet dure to the holidays.

  RC is set to used.

  Should I test the static first to see what it is and then set it to the correct setting. Or just set it to 9? I usually leave it set to the default and have never has an issue. Is there any documentation that you can direct me to as to how to set the static and how it effects the performance of the system or fan speed? Have have not found any.

  0
• 

  Blue Line Heating and Air

  • 5 de enero de 2024 22:10

  The default static is designed for that unit when it is installed without ducting. Basically just a single supply and return grill similar to the UTD-GXTB-W auto louver grill and that cheap ass MERV 1 washable filter that comes in the box. When you add supply and return plenums and ductwork, and a good quality pleated air filter the static pressure setting should be changed to the higher static pressures (setting 7, 8, or 9) typically. I almost alway set them to 9 when ducting. 

  0
• 

  the Best HVAC

  • 5 de enero de 2024 23:04

  Thank you for your help. I will get back there and check the static to make sure I correct the settings.

  Have a prosperous 2024 !

  0

Iniciar sesión para dejar un comentario.