16 - CONTROL CABINET CONTROLLED BY THE CHILLER OPTION (AUX1)
Purpose
■ Protects and controls the motors. The electronic board enables communication with certain chillers that have the board embedded,
allowing the temperature or pressure to be used for control.
Power supply
■ See connection sheet or wiring diagram supplied with the cabinet.
Limits of use
■ Ambient air:
- Storage temperature: -40/+60°C
- Operating temperature: -25/+55°C
Components
■ Packing boxes are provided for the installer on the base of the cabinet.
■ A lockable isolator switch is used as an emergency stop.
■ Protection against short circuit provided by 1 or 2 three-pole circuit breakers (ICC = 10 KA)
■ Protection against overload: thermal cut-out wiring on electronic board.
■ 1 230 V switch per stage, except variable speed fans (EC) which do not have a switch.
■ 1 Electronic board.
■ Temperature sensor (drycooler): mounted on the outlet piping (control sensor).
Electrical connection
■ Before connecting, make sure that the machine's disconnect switch is open.
■ The cabinet is connected to the motors and mounted on the front of the unit, on the inlet manifold side.
■ For electrical connection, refer to the connection sheet or wiring diagram supplied with the cabinet.
■ The cables to use for the power connection must be made from copper. If cables made from other materials, such as aluminium,
are used, bimetallic terminals and connectors or intermediate terminals must be used.
■ The electrical connections are to be made as follows:
- Connection of the protective conductor to the earth terminal.
- Connection of the power circuit to the disconnect switch after checking that the power supply cable is disconnected.
■ Outdoor temperature sensor: 25 m cable
- The machine should be positioned so as to enable the outdoor sensor to be installed on the building's closest northern side. If
necessary, the sensor must be positioned on the northern side of the unit, away from moving air (fan, etc.). If none of these
conditions can be met, the customer must install a weather mast. (Not supplied)
- The sensor cable must be protected against external harmful elements.
- Do not expose the outdoor sensor to direct sunlight.
Electronic board functions.
■ Refer to the chiller manual.
Options
■ 400/230 V transformer for the control circuit, for 400 V 3-phase supplies without neutral.
■ Water loop temperature sensor (drycooler) to be installed with freecooling upstream of the valve: 25 m cable G 1/2" sensor pocket.
Ventilation
■ Louvres with lters are tted on the sides of the cabinet. As an option, a fan may be added for use from 45 to 55°C.
Heating
■ As an option, a heater connected to a temperature sensor may be added for use from -20 to -40°C.
Humidity
■ As an option, a heater connected to a humidity sensor may be added for use above 60 % humidity.
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