Air-Cooled Liquid chillers & Reversible Air to Water Heat Pumps
Pro-Dialog+ combines intelligence with operating simplicity. The control constantly monitors all machine parameters and precisely manages the operation of compressors, expansion devices, fans and of the water heat exchanger water pump for optimum energy efficiency. Pro-Dialog+ interface
Remote operating mode with volt-free contacts
A simple two-wire communication bus between the RS485 port of the unit offers multiple remote control, monitoring and diagnostic possibilities. - Start/stop: Opening of this contact will shut down the unit - Dual set point: Closing of this contact activates a second set point (example: Unoccupied mode) - Alert indication: This volt-free contact indicates the presence of a minor fault - Alarm indication: This volt-free contact indicates the presence of a major fault that has led to the shut-down of the unit - User safety: This contact can be used for any customer safety loop, closing of the contact generates a specific alarm - Out of service: This signal indicates that the unit is completely out of service - Unit capacity: This analogue output (0-10 V) gives an immediate indication of the unit capacity - Compressor operation: This contact signals that the compressor is in operation
Energy management • Seven-day internal time schedule clock: Permits unit on/ off control and operation at a second set point • Set point reset based on the outside air temperature or the return water temperature or on the water heat exchanger delta T • Master/slave control of two units operating in parallel with operating time equalisation and automatic change-over in case of a unit fault. • Change-over based on the outside air temperature - Integrated features • Night mode: Capacity and fan speed limitation for reduced noise level - Ease-of-use • The new backlighted LCD interface includes a manual control potentiometer to ensure legibility under any lighting conditions. • The information is displayed clearly in English, French, German, Italian and Spanish (for other languages please consult CIAT) • The Pro-Dialog+ navigation uses intuitive tree-structure menus, similar to the Internet navigators. They are userfriendly and permit quick access to the principal operating parameters: number of compressors operating, suction/discharge pressure, compressor operating hours, set point, air temperature, entering/leaving water temperature.
This interface allows access to the same menus as the unit interface and can be installed up to 300 m away. It includes a box that can be mounted inside the building. The power supply is provided via a 220 V/24V transformer supplied.
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A