Nagas ABE Series, Installation, Operation And Maintenance Manual

Page: 16 / 45

16 of 45
Installation, operation, and maintenance manual-ABE Rev 1_2023
7. SEQUENCE CONTROL
7.1. LOCAL CONTROL MODE
Strat sequence:

Starting the unit via HMI screen or remote display.

The fresh air and exhaust dampers open at their maximum position.

Following the proof of opening of the fresh air and exhaust dampers, the supply and exhaust fan start at
the speed chosen in the HMI (CFM speed setpoint).
 The recuperator starts by following the temperature control sequence.
Display on the control screen:

Starting the unit.

Supply temperature setpoint (°F/°C).

Setpoint of the flow rate of each fan (CFM).

Temperature readings of each sensor in the unit.
- Outside sensor.
- Supply sensor.
- Return air sensor.
- Exhaust sensor.

Notification of alarms.

Fan airflow reading (CFM).
7.2. REMOTE CONTROL MODE
Start sequence:
 Starting the unit via dry contact (by others).
 Once the dry contact is closed, the fresh air and exhaust dampers opens at their maximum position.

Following the proof of opening of the fresh air and exhaust dampers, the fans start and modulate
according to the input signal 0-10 volt (by others).

The recuperator starts by following the temperature control sequence.

Alarms are sent as a dry contact.
Display on the remote interface:

Reading of the supply temperature setpoint (°F/°C).

Temperature readings of each sensor in the unit.
- Outside sensor.
- Supply sensor.
- Return air sensor.
- Exhaust sensor.

Fan airflow reading (CFM).