I have a 2 stage Amana 18SEER Heat Pump with a nominal rating of 3T. When in heating mode the communicating thermostat claims the unit is moving 825 CFM on low heat (24,000 BTU).
Is this a actual 825CFM as measured by the AHU or is it an assumed value based on a typical pressure and fan speed?
The thermostat has a trim adjustment to add/subtact up to 10% of the airflow so the AHU could, in theory, provide between 740 and 900 CFM.
What is the need for this trim adjustment? When would a tech need to make an adjustment in airflow? A assume it could be used to adjust register discharge tempeartures?
How would the efficiency of the heating performance be affected if the air flow was reduced or increased?
Sorry for all the questions, just trying to understand my new system.