Wire each I/O point using shielded twisted pair (Belden 8760 or equivalent). Terminate shields at the chassis ground bar only—do not connect to PLC common.

To prevent catastrophic chemical spills caused by sensor failures or sheared sample lines, configure the . Set a maximum allowable continuous runtime for each chemical feed relay (e.g., 60 minutes). If a pump runs continuously for this duration without hitting the setpoint, the BECSys5 will trip an alarm, cut power to the respective relay, and require a manual reset. 7. Troubleshooting Common Error Codes and Faults Symptom / Error Code Potential Root Cause Corrective Action "Low Flow" / No Flow Alarm

Performance optimization and energy strategies

Inspect sensors for scaling or debris. Clean with a soft brush and mild detergent if necessary.

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The BECSys5 is a modular building energy control system designed for HVAC, lighting, and auxiliary load management. This manual covers hardware installation, network configuration, controller addressing, and core technical parameters for system integrators and certified technicians.

For on/off or pulse relays, set the cycle time window (typically 10 to 60 seconds). A 30-second cycle time at a 50% demand means the relay will stay closed for 15 seconds and open for 15 seconds. Safety Overfeed Timers