System Operation
4.9.7 Sea-side Mode
Seaside mode will disable free cooling unless the conditions for emergency ventilation are met.
4.9.8 AFPD
The Air Filter Protection Device (AFPD) will automatically shut the damper when it detects a particulate
concentration that is higher than a preset concentration (adjustable between 0.15-0.35 mg/m
3
). When a
protection event is triggered, the damper will automatically shut. It will remain shut for a minimum of 1 hour
and display the AL*60 alarm unless the controller is manually reset.
After the hour, it will sample the particulate concentration at 1 minute (configurable) intervals and re-open the
damper when it is below the opening threshold.
4.9.9 Condenser Monitoring
The heat transfer across the condenser coil is monitored by the system and can be used to schedule
preventative maintenance when the efficiency is low. Condenser status can be monitored under “Cond. fan
dirty rate” in the “
Table 4-4” shown on Page 58.
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