Room temperature controller for two and four-pipe fan-coils, manual or automatic three-stage fan speed control with remote RS485 Modbus communication.

Properties:

• supply voltage 230 VAC, outputs ON / OFF or 3-point
• output for 3-stage or 1-stage fan
• two multifunction inputs for input card reader, separate temperature sensor, etc.
• operating modes: comfort, attenuation and protection mode
• automatic or manual heating / cooling switching
• adjustable configuration and control parameters
• control by buttons on the thermostat or remotely via RS485 Modbus communication
• limitation of the maximum or minimum adjustable setpoint temperature
• mounting in a rectangular wiring box with a screw pitch of 60.3 mm
• backlit LCD display

The controllers are suitable for systems:

• heating or cooling
• automatic heating / cooling switching
• manual heating / cooling switching
• heating and cooling (eg 4-pipe system)

Advantages:

• room temperature control via built-in or separate temperature sensor or return air temperature sensor
• automatic or manual switching between heating and cooling
• application selection using DIP switches
• selection of operating mode using the button on the controller
• automatic or manual speed control of 1- or 3-stage fan
• display of the current room or setpoint temperature in ° C, ° F or both
• limitation of the maximum or minimum adjustable setpoint temperature
• lock controls
• improved fan control function, eg fan start-up, adjustable fan blocking depending on heating / cooling mode.
• purge function in conjunction with 2-way valves in 2-pipe systems with automatic heating / cooling switching
• reminder to clean the filter
• temperature limitation for underfloor heating
• return to factory settings of configuration and control parameters
• RS485 Modbus remote communication
• two multifunction inputs, freely adjustable for:

1. operating mode switch (eg input card reader)
2. sensor for automatic heating / cooling switching
3. separate room temperature sensor or return air temperature sensor
4. dew point sensor
5. permission to run electric heating (tariff change)
6. fault input
7. monitoring input - temperature sensor or switch status