NIST APAR25 – Persistent supply air temperature error exists (All Occupied Modes)
Applicable Systems
NISTAPAR: APAR25
Primary: AHU, RTU, MUA, ERV
Objective/Method/Outcome
Objective: Indicates that the SAT is not within the desired set point (Valid for All Occupied Modes). If APAR 3, 13, or 19 are active, this rule will be suppressed.
Method: Check if the SAT is not within ±1.5 degrees of set point for more than 4 occupied hours per week.
Outcome: An insight is generated when the SAT is not within ±1.5 degrees of set point for more than 4 occupied hours per week.
Logic
If (abs(SAT - SAT SP) > Temperature Threshold)
NIST APAR25 – Persistent supply air temperature error exists (All Occupied Modes)
Inputs
SAT {sensor, discharge, air, temp} (Real Trend Log)
