REGIN RCFD-230C Room Thermostat
Instruction Manual
Introduction
This document provides instructions for the REGIN RCFD-230C room thermostat, designed for regulating heating and/or cooling in rooms via on/off outputs for 2- or 4-pipe installations. It features a three-speed fan control and a large LCD touch screen for status display and parameter access.
? Note! More information about the product can be found in the full manual, available for download from www.regincontrols.com.
Safety Precautions
⚠️ Caution! Read and understand this instruction before using the product.
⚠️ Caution! Ensure that the installation complies with local safety regulations.
❗ Warning! Before installation or maintenance, the power supply must first be disconnected to prevent potentially lethal electric shocks! Installation or maintenance of this unit should only be carried out by qualified personnel. The manufacturer is not responsible for any eventual damage or injury caused by inadequate skills during installation, or through removal of or deactivation of any security devices.
Function
The room thermostat regulates heating and/or cooling in a room using on/off outputs suitable for 2- or 4-pipe systems. It includes a function for three-speed fan control. The large LCD touch screen displays the current status and allows access to all parameters, including setpoint, hysteresis, and fan speed. The unit has a built-in temperature sensor for room temperature control. The change-over function can be managed by an external PT1000 sensor or a digital input connected to a potential-free contact. Features like mould protection and automatic valve exercise ensure proper functionality and a problem-free installation over time.
Technical Data
| Parameter | Value |
|---|---|
| Supply voltage | 230 V ~ (207…253 V ~ 50/60 Hz) |
| Power consumption | < 2 VA |
| Protection class | IP30 |
| Ambient humidity | 10…90 %RH (non-condensing) |
| Ambient temperature | 0…50 °C |
| Measuring range, temperature | 0…50 °C |
| Sensor element, temperature | NTC |
| Accuracy, temperature | ±0.5 K |
| Display | Built-in |
| Display type | LED-backlit LCD |
| Output signal, temperature | NTC |
| Setpoint adjustment | 5…35 °C |
| Mounting | Room (flush-mounted with screw distance cc 60 mm) |
| Installation | Fan-coils, 2- or 4-pipe |
| Digital inputs (DI) | 1 x Closing potential-free contact |
| Digital outputs (DO) | 3 x Relay outputs for 3-step fan control, 230 V AC, Max. 5 A 2 x Relay outputs for On/Off valve actuators, 230 V AC, Max. 5 A |
| Analogue inputs (AI) | 1 x PT1000 |
| Change-over function | Automatic |
| Communication port | 1 |
| Internal serial port, type | RS485 |
| Internal serial port, built-in protocol | Modbus (RTU) |
| Internal serial port, communication speed | 9600 bps (4800…38400 bps) |
| Internal serial port, parity | Even (Even, Odd, None) |
| Internal serial port, stop bit | 1 (1 or 2) |
| Cable connection | Screw terminals max. 1.5 mm² (AWG 16) |
| Dimensions, external (WxHxD) | 95 x 95 x 50.5 mm |
Installation
Follow these steps for installation:
- Separate the back plate from the display part using a small screwdriver. Insert the screwdriver into the grooves at the bottom of the unit.
- Connect the wires to the terminals.
- Place the back plate over the electrical wallbox and fasten it on the wall using the mounting holes.
- Clip the display back onto the back plate.
Wiring
The following terminals are available for wiring:
| Terminal | Description |
|---|---|
| L | Supply voltage |
| N | Supply voltage |
| FAN1 | 230 V AC Relay 1 |
| FAN2 | 230 V AC Relay 2 |
| FAN3 | 230 V AC Relay 3 |
| Heat | 230 V AC Relay 4 |
| Cool | 230 V AC Relay 5 |
| GND | GND (for DI) |
| DI | Digital input for presence detection, hotel key card etc. |
| Temp | Analogue input for external PT1000 sensor, change-over |
| GND | Agnd for terminal Temp |
| N | Serial communication port, Com N |
| A | Serial communication port, Com A |
| B | Serial communication port, Com B |
Wiring Diagram Descriptions:
4-Pipe System Wiring (Figure 1): Illustrates connections for a 4-pipe HVAC system. Terminals L and N are for supply voltage. FAN1, FAN2, and FAN3 are relay outputs for 3-speed fan control (230V AC, Max. 5A each). HEAT and COOL terminals are relay outputs for valve actuators (230V AC, Max. 5A). GND is for the digital input. DI is a digital input terminal for functions like presence detection or hotel key cards. TEMP is an analogue input for an external PT1000 sensor or change-over signal, with its corresponding ground terminal AGND. Serial communication ports N, A, and B are provided for Modbus communication.
2-Pipe System Wiring (Figure 2): Similar to the 4-pipe diagram, this illustrates connections relevant for 2-pipe systems, utilizing the same terminal designations for fan control, heating/cooling outputs, digital/analogue inputs, and serial communication.
Settings
Thermostat settings can be controlled in several ways:
- Display Buttons: User settings such as temperature setpoint adjustment and fan speed.
- Parameter List: Quick configurations for installers. Access by pressing the Arrow up ⬆️ and Arrow down ⬇️ buttons simultaneously for five seconds.
- Modbus Variables: Advanced thermostat control via Modbus communication.
Table 1: Buttons available on the display
| Symbol | Description |
|---|---|
⟳ | Changeover button to switch between heating and cooling via the display. |
⬆️ | Arrow up / Increase button |
? | On/Off button |
⬇️ | Arrow down / Decrease button |
? | Fan button to regulate the fan speed via the display. |
Note! All parameters and variables are listed in the full manual.
Handling and Operation
The display behavior varies depending on the thermostat's mode and state:
Thermostat States:
- Off: Energy saving state where the thermostat neither heats nor cools. No background light is on; only the On/Off button is visible.
- Standby: Energy saving state with reduced heating or cooling.
- Occupied: Comfort state when a person is present in the room, allowing for optimal heating and cooling.
Display Modes (when in Standby or Occupied state):
- Idle mode: The thermostat has been inactive for a set time span. All buttons and segments, except the two arrows, are dimmed.
- Active mode: The thermostat is active, but no changes are being made. The display shows either the calculated setpoint or the current room temperature.
- Setpoint mode: Activated by pressing one of the arrow buttons ⬆️ / ⬇️ while in Active mode. The display shows either the calculated setpoint or the user-defined setpoint adjustment.
Contact Information
For sales and inquiries:
DEOS AG
Birkenallee 76
48432 Rheine, Germany
Tel: +49 5971 91133-0
Fax: +49 5971 91133-2999
www.deos-ag.com
info@deos-ag.com
AB Regin
Box 116
428 22 Kållered, Sweden
Tel: +46 31 720 02 00
Fax: +46 31 720 02 50
www.regincontrols.com
info@regincontrols.com
This product carries the CE-mark.
Professionelle Gebäudeautomation von DEOS AG
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