Setpoints and related data
- A2L Leak Detector Alarm (A2LLeakAlarm)
- A2L Leak Detector Alarm-Lockout (A2LLeakAlarm-LO)
Inputs
The input for the A2L Sensor is the RDS (Refrigerant Detection System) binary input.
Outputs
- Supply Fan goes to a fixed speed of 50%
- All heating and cooling outputs are turned off
Operation
When the RDS Sensor binary input (BI) reads 0VAC, it is considered an alarm condition. When the BI reads 24VAC, it is considered the normal condition.
When an alarm is detected, the unit shuts down any cooling and heating outputs. The supply fan also turns on at 50%, if it was not already on. Heating and cooling remains off and the supply fan remains on as long as the RDS sensor is in the alarm condition, plus an additional 5 minutes after the sensor returns to the normal condition. If the alarm happens three times within two hours, the unit performs a lockout and requires a reset (ResetLO) to go back to normal operation.