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Application Examples using Modbus HLS Room Controllers
The diagrams below illustrate a number of typical applications using HLS room controller. The controllers have built-in display, touch sensitive buttons, compact design, built-in and/or external sensors, support for most typical actuator types and Modbus networking capability.
- Attractive and Clear LCD Display
- Touch sensitive Buttons for Settings
- 0..10Vdc, Thermic On/Off or 24Vac Raise/Lower Actuator Support (depending on application)
- Simple Configuration through on-board Display
- Modbus RS-485 Networking Capability with Well Defined Specification – use with any BMS
TYPICAL APPLICATIONS INCLUDE
- 4-Pipe FCU Control with Fan Speed
- 2-Pipe FCU Control with Heating / Cooling
- Air-Side Control for Mid-Position Actuators
- Heating Radiator Control
- Underfloor Heating / Cooling Control
- CO2 Damper / Louvre Control with Local Heating Coil for Classrooms
- Pressure Dependent VAV Control with CO2 Boost
- CO2 Boost for FCU Applications
APPLICATION EXAMPLES
4-Pipe Fan Coil Unit and Fan Speed Control
HLS34 controller provides 4-pipe fan coilunit control with or without fan speed control. The controller can modulate 3-point, thermic and 0..10Vdc actuators.
- Heating and Cooling Valve
- 3-Speed Fan Control
- Simple Configuration via LCD
- Wide range of adjustments
- Built-in Display
- Internal/External Sensor
- Modbus Communications
- 3 and 4 Button Versions Available
2-Pipe Fan Coil Unit and Fan Speed Control
HLS34 controller can be used to control temperature in room spaces where natural or forced fresh air is used for cooling effect. Local heating coil / electric heater is used heating the air to required level. Furthermore the CO2 measurement is used to control the CO2 level by increasing the amount of fresh air. This provides comfort control is environments such as classrooms.
- Fresh air damper or louvre control
- Damper louvre control based on cooling demand or high CO2 content
- Advanced functionality in a compact controller
- Fan speed option using FCRY-3 module
Underfloor Heating and Cooling
HLS35 controller can be used for advanced underfloor heating and cooling applications. Modbus networking allows additional energy efficiency to be implemented shifting the occupancy setpoints depending on the environmental conditions.
- Single Heating / Cooling Valve
- Central system setpoints
- Min. temperature limiting sensor to avoid condensation
- Setpoint adjustment with single decimal point accuracy
- Ideal for all underfloor systems
- Accurate Modulating Control
Air Side Fan Coil Unit Control
In this application HLS35 controller is used to modulate mixing damper to divert the air flow through a heating or a cooling coil. The Modbus networking provides capability to network all controllers to a BMS system. The Modbus protocol support is comprehensive and easy to configure as a paret of the system.
- Damper in mid-position when the system is in setpoint
- All features as with the HLS34 controller
- Simple setup of the controller
| MODEL | DESCRIPTION | COMMUNICATION |
|---|---|---|
| HLS34 | Intelligent Room Controller for Heating and Cooling Applications and for Fan Coil Units, 4 Buttons (Increase/Decrease/Extension/Fan) | Modbus RTU |
| HLS34-S1 | Intelligent Room Controller for Heating and Cooling Applications and for Fan Coil Units, 3 Buttons (Increase/Decrease/Extension) | Modbus RTU |
HLS NETWORKING DIAGRAM
