General Information - Carrier CCU Controller Bedienungsanleitung

1 - GENERAL INFORMATION

The CCU CONTROLLER is fitted as standard to Close Control Unit systems. Setting and display console equipped with a
160-character LCD screen. The CCU CONTROLLER is equipped with a microprocessor and an expansion board to provide
the following functions:
● Filtration
Checking the pressure drop in the filters, by monitoring the air flow and fouling level.
● Control function (Cooling Mode)
- Chilled water model:
Gradual opening of the three-way valve following an increase in temperature.
● Control function (Heating Mode)
- Hot water coil model:
Gradual opening of the three-way valve following a decrease in temperature.
- Electric heater model:
Triggering of one or two stages following a decrease in temperature.
● Control function (Dehumidification Mode)
- Opening of a chilled water valve or triggering of refrigerating stages, following an increase in humidity.
- Triggering of heating mode if there is a drift in temperature.
- As an option, decrease in the air flow to increase the latent part of the cooling capacity.
● Control function (Humidification Mode)
- Triggering of humidification following a decrease in humidity.
● Fan control
- Management of operation and faults for a 1-speed fan or variable speed control fan.
- Fan on/off via an outer contact, internal timer.
- Variable speed control via temperature regulation or dehumidification.
- Time-limited fan delay for an electric heater.
- Interlock the controls and controllers to operation of the fan.
- Shift in start-up, if there are several units at the same site.
- Soft start of the ventilation if there is a variable air volume.
● Safety and alarms
- Overheating thermostat (Manual reset) on the electric heater.
- Pressure sensor for checking the air flow and filter fouling (Thresholds interlocked to the variation in the air flow).
- Configurable alarm threshold for high and low temperature.
- Configurable alarm threshold for high and low humidity.
- Low supply air temperature limitation sensor (limitation of the cooling capacity).
- Water leak sensor.
● Configurable potential-free (dry) contacts made available for:
- Critical fault summary: air flow, fan, compressors, clogged filter, temperature sensor.
- Non-critical fault summary: filter fouled, electric heater, humidifier, water leak, target temperatures exceeded, target relative
humidity exceeded.
● Memorisation
- Storage of the last 20 faults with the date and time of each fault, plus the readings of all the analogue input values at the time of
the fault.
- Parameter setting storage in the event of a power failure.
● Remote control
- Option of remote control.
● Metering
- Option to display metering for:
- The number of operating hours for the fans, compressors, electric heater stages, the humidifier, the fault summaries sent with
individual reset of each meter.
- The number of the compressor start-ups.
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