Daikin announces the release of its new Smart Control System (SCS), a control solution suitable for managing hydronic plants, including chillers, heat pumps, air handling units, and fan coils. Available in January 2025, SCS allows the optimisation of the working conditions of a whole HVAC system, focusing on comfort applications—light commercial, offices, small and medium hotels.
Overview of the system
SCS is the latest development of Daikin control solutions dedicated to the management of hydronic HVAC plants, facilitating design, installation and operation. Using SCS, a complete Daikin solution can be designed and supplied, including chillers, heat pumps, air handling units (AHUs) and fan coils. SCS is available as an external panel, to be connected to the units in the system via Modbus protocol.
The above scheme describes a simplified architecture where SCS manages Daikin Products (heat pumps, AHUs, fan coils) through Modbus/RS485 communication. SCS is controlling and optimising the entire system, including:
- The common water outlet temperature sensor wired to the first chiller / heat pump
- The pumps mounted on chillers
- Eventual manifolded pumps
Control system configurations
Smart Control System is offered in three main configurations, allowing for scalability in hardware,
license and price. Each version can manage up to 4 chillers or heat pumps with a total cooling capacity of up to 500 kW and additional equipment as follows:
- Light (up 500 data points): up to 20 fan coil zones or 10 AHUs
- Medium (up to 1250 data points): up to 70 fan coil’s zones, or 10 AHUs + 50 fan coils’ zones
- Full (up 2500 datapoints): up to 120 fan coil’s zones, or 10 AHUs + 100 fan coils’ zones
A fan coil zone can consist of up to 30 fan coils, managed via a dedicated controller, also developed and supplied by Daikin.
Product coverage
SCS is available to manage plants with the following equipment, offering flexibility to cover many applications and installations.
Chillers & heat pumps
- EWAT-CZ air-cooled chillers and EWYT-CZ air-to-water heat pumps, with Daikin inverter scroll compressor and R-32 refrigerant, available from 16 to 90 kW capacity in standard design conditions.
Air handling units for decentralised ventilation systems:
- Compact T available in 5 sizes and covering from 200 to 4200 m3/h air flow rate
- Compact L, ideal for floor ceiling applications, available in 6 sizes from 02 to 07 and from 150 to 4000 m3/h air flow rate
Fan coil units
- Cassette: FWH-A, FWI-A, FWC-D, FWF-D
- Ducted: FWP-C, FWB-C, FWD-A, FWN-A, FWE-F, FWE-D
- Floor-standing: FWZ-A, FWV-D
- Flexi: FWR-A, FWL-D, FWS-A, FWM-D
8 reasons to choose Daikin Smart Control System
HVAC plant design requires considering plant performance over its whole lifetime to keep CO2 emissions and running costs as low as possible. Daikin SCS makes this possible as it ensures optimal control of units in the system in every condition for many different plant configurations and with minimum design and installation effort. The reasons below explain the product-related advantages, leading to consistent benefits for designers, consultants, and end customers.
Reason #1: Developed by Daikin, SCS represents the best configuration for optimising performances, using information from units’ sensors and controllers.
Reason #2: Available in 3 configurations (Light—Medium—Full), it can easily adapt to many different projects and installations, opening new opportunities to optimise running costs in small—to medium-sized HVAC plants.
Reason #3: With SCS, Daikin is providing a turnkey solution, facilitating the work of plant designers and consultants.
Reason #4: SCS ensures optimal plant operation through its advanced optimisation logic. In every condition, SCS determines the best working configuration for the units, prioritising comfort and monitoring system efficiency and running costs. Indeed, the Smart Defrosting feature ensures that heating is provided in every case. Advanced Staging algorithms, chilled / heated water temperature optimisation and Pumping optimisation logic ensure all working conditions are controlled and set in the most appropriate configurations.
Reason #5: Plug & play installation. SCS requires only the external panel and a few additional sensors. Every unit is then connected via Modbus in series to ensure connection to SCS. It is a simple system, leveraging mainly sensors mounted on board the units in the system.
Reason #6: Smart system architecture makes SCS highly competitive vs third-party control systems that would need many extra sensors
Reason #7: Optimised lifetime reliability. SCS improves the reliability of the entire system by optimising the working conditions of the units in the system, which leads to an extended life of the entire HVAC system. It also reduces maintenance costs related to manpower and spare parts, even compared to third-party control systems, as fewer sensors are used to control the system.
Reason #8: Fast implementation. The Daikin technician can easily install it during commissioning, avoiding extra costs for configuring third-party specialised systems.
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