MClimate Fan Coil Thermostat LoRaWAN®

Overview

RG21 - Spécialiste IoT & M2M

14 rue Edouard Petit, 42000 St-Etienne

Tel: +33 477 92 03 56

Email: contact@rg2i.com

www.rg2i.com

The MClimate Fan Coil Thermostat (FCT) is a LoRaWAN Thermostat for 2- and 4-pipe Fan Coil Units, accommodating 1-3 speed or ECM fans. It is ideal for building retrofitting, enabling room-by-room monitoring and control, enhancing energy efficiency, and significantly reducing heating/cooling expenses. Its 4.2” e-ink fast refresh display allows users to change the target temperature and view current indoor conditions. The fully open and transparent communication protocol allows seamless integration into different systems, including the MClimate Enterprise platform.

The MClimate FCT is a Class C LoRaWAN device, available for EU868, US915, AS923, and AU915 regions. This ensures real-time communication between the FCT and the LoRaWAN network, allowing commands to be sent to the FCT and for it to respond as soon as possible.

MClimate's aim is to help decarbonize buildings. The Fan Coil Thermostat unlocks great retrofitting opportunities, providing quick access to control and monitoring on a room-by-room basis within a building.

MClimate FCT can be integrated into existing BMS and BAS systems. Visit MClimate's website for more information.

FCU Configurations Supported:

Additional Inputs/Outputs:

• Room occupancy/Key card input (opened/closed circuit)
• Auto-changeover external temperature sensor (10k NTC, max 3m length)
• Dew point sensor (opened/closed circuit)
• Filter alarm (opened/closed circuit)

Key Functions:

• Maintenance of room temperature via built-in or external sensor.
• Automatic or manual changeover between heating and cooling mode.
• Selection of operating mode via the thermostat's button.
• 1-speed, 3-speed or DC 0...10 V fan control (automatic or manual).
• Display of current room temperature or setpoint in °C.
• Minimum and maximum setpoint limitation.
• Buttons lock.
• 1 digital input, freely selectable for: Occupancy mode contact (keycard), automatic heating/cooling changeover 10k NTC, dew-point sensor, fault input.
• Advanced fan control function (e.g., fan kick, selectable fan operation).
• Installer's menu for setting wiring configuration and further settings.

Technical Specifications

Designed and manufactured by MClimate™ in the EU.

SKU: MC-LW-FCT-01

Dimensions: 105 x 115 x 23mm

Weight: 220gr

Materials: ABS, PC, Stainless steel

Radio frequency range: 863÷870MHz / 902-928MHz

Radio technology: LoRaWAN Class C, EU868, US915, AS923 and AU915

Power supply: 110-240VAC, 50/60Hz, 5mA

Outputs:

• Output (1-4): 5(2)A
• Output 5NA, 5NC: 5A

Note: No internal fuse. External preliminary protection with max. current 10A circuit breaker required in all cases.

Fan Control:

• (1-3 speed fans): Q1, Q2, Q3 - 220VAC, Rating min, max, resistive (inductive): 5(2)A
• (ECM fans): IO1 and IO2, control signal between 0VDC and 10VDC

Note: Fans must NOT be connected in parallel! Connect one fan directly; for additional fans, use one relay for each speed.

Control Outputs:

• V1: V1-V4: 230V AC; 5A resistive load, 2A (cos φ > 0.4)
• V2: 230V AC, resistive load only, max 5A (3A fast microfuse, cannot be exchanged)

Multifunctional analogue/digital input/output IO1 and IO2:

Operation: Selectable through downlink. Options include auto change-over NTC, ECM FAN, filter alarm contact, dew point sensor contact, occupancy (keycard) contact.

Change-Over temperature sensor:

• Type: 10k NTC (10k at 25 degrees C)
• Temperature range: 0 to 125 degrees C
• Maximum cable length: 50m at 1.5mm² (AWG 16).

Connection terminals:

Solid wire or prepared stranded wire, 0.25mm² - 1.5mm² (AWG 24 to AWG 16).

Operating Conditions:

• Operating temperature: 0°C to +50°C
• Operating humidity: 0-80% RH (non-condensing)

Storage & Transport Conditions:

• Temperature: -25...65 °C
• Humidity: <95% r.h.

IP rating: IP31 (EN60529)

Mounting options: Screws and dowels on a wall, screws on an electrical box; Anti-theft bracket with secure screw (T5 Torx).

Legal Notices & Safety Instructions

Legal Notices:

All information, including features, functionality, and product specifications, is subject to change without notice. MClimate reserves the right to review or update its products, software, or documentation without prior notification. MClimate and the MClimate logo are trademarks of MClimate Jsc. Other brands and product names are trademarks of their respective owners.

EU Declaration of Conformity:

This device complies with the essential requirements and other applicable provisions of the EU directives: 2014/53/EC, EN IEC 60730-2-9, EN IEC 62368-1, EN 55032, EN 55035.

CE

Safety Instructions:

Environmental conditions for device operation:

• Indoor use only.
• For altitude up to 2000m.
• Ambient temperature: 0°C to +50°C.
• Maximum relative humidity: 80% up to 31°C, decreasing linearly to 25% at 50°C.
• Environment with degree of contamination 2 (PD2).

Based on EU Regulation 813/2013 (Eco design directive) and 811/2013 (Labeling directive) concerning space heaters, combination heaters, the following classes apply:

• Application with On/Off operation of a heater Class I value 1.0% PWM (TPI) room thermostat, for use with Class IV value 2.0% On/Off output heaters RDG110.
• Application with On/Off operation of a heater Class I value 1.0% RDG100../RDG110.

Installation Guide

Tools Required:

• T5 torx screwdriver ?
• Small flat screwdriver ?

Commissioning:

Before installing, commission the device on your LNS. Upon powering, it initiates a LoRaWAN join-procedure using SF12. Enable ADR in your LNS and/or mark the device as static for better communication interval.

Device Registration:

1. Open your LoRaWAN® Network provider access panel and add the device using the supplied Serial Number, DevEUI, AppEUI (JoinEUI), and AppKey.

2. Continue the installation with your LoRaWAN® Network provider's instructions.

You can obtain DevEUI, AppEUI (JoinEUI), and AppKey information from the LoRaWAN® credentials .csv file provided with the fulfillment confirmation.

⚡ Danger of electrocution!

Removing the device from the mounting bracket exposes parts carrying mains voltage. Only a qualified electrician or manufacturer's service personnel should open the unit. Before working on electrical connections, disconnect the unit from the mains power supply. Do not leave the opened unit unattended. Do not insert objects into the housing's slits. Disconnect any damaged devices from the mains power supply.

⚡ Danger - Electrical voltage!

Contact with live components, ungrounded thermostats, or uninsulated cables can cause electric shock, property damage, serious injury, or death.

• Disconnect the device from the power supply before making electrical connections.
• Insulate and secure all unused cables and wires before applying voltage.

Installation Conditions:

• Connection may only be performed when the system is disconnected from the electrical supply.
• The unit must be protected against contact.
• An external primary isolating facility must be present.
• The device must not be installed in vibrating systems (e.g., transport) as vibrations can cause micro-interruptions in relays.
• Plant devices are connected via screw terminals with appropriate 0.25N torques.

Wiring:

Rigid wiring: 0.05cm² - 1.31cm²

Torque: M = 0.25 Nm

Mounting

Placement:

The room thermostat must be mounted in a clean, dry indoor place and must not be exposed to drip or splash water.

Warnings:

• ⚠️ Warning! Do not mount the device on a metallic surface.
• Use only valve actuators rated for AC 230 V.
• Comply with local regulations to wire, protect, and earth the thermostat.
• ⚠️ Disconnect power supply before removing the thermostat from the mounting plate!
• ⚠️ Warning! No internal line protection for supply lines to external consumers (Q1, Q2, Q3, V1, V2). It is recommended to use a 6A circuit breaker for each. Risk of fire and injury due to short-circuits!

Mounting Guidelines:

• Do not mount on a wall in niches or bookshelves, behind curtains, above or near heat sources, or exposed to direct solar radiation. Mount about 1.5 m (5 feet) above the floor.
• Adapt line diameters as per local regulations to the rated value of the installed overcurrent protection device.
• Inputs IO1 and IO2 carry mains potential. If sensor cables are extended, they must be suited for mains voltage.
• The AC 230 V mains line must have a circuit breaker with a rated current of no more than 10 A.
• Properly size cables to the thermostat, fan, and valve actuators for AC 230 V mains voltage.

Mounting Steps:

1. Turn off the power supply to the existing thermostat and remove it WITHOUT disconnecting the cables.
2. Find out what is the correct wiring diagram. Further in this document, you'll find diagrams for different Fan Coil Units. Correctly identifying the wiring diagram is paramount for the correct working of the Fan Coil Thermostat.
3. Remove the power module from the Fan Coil Thermostat by lifting it. A flat screwdriver ? can be used.
4. Connect the wires according to the chosen Wiring Diagram. Ensure no stranded wires or exposed wire metal are left in the terminals.
5. Re-insert the power module into the FCT and restore power using the breaker.
6. Enter the Installer's menu: turn the device off (hold the M button for 3 seconds), then hold the reset button (on the back) and the fan speed button for 5 seconds.

Check the connections every 6 months and tighten them again if needed! ⚙️

8. Mount the mounting bracket on the wall using the enclosed screws and dowels if needed.
9. Once you enter the Installer's menu, select the correct wiring diagram for your application.
10. Validate that the Fan Coil Unit is reacting to adjusting the modes, fan speed, and target temperature through the FCT.
11. ⚠️ Do not use non-flat head screws for the mounting bracket. ✔️ ❌
12. Slide the FCT onto the mounting bracket and tighten the security screw on the bottom.

User Interface Guide

Physical buttons:

The device has 4 visible physical buttons.

User interface elements:

The device has a simple and intuitive user interface.

Operating Instructions

Turning the thermostat ON/OFF:

The button on the far left serves two functions: turning the device on/off and switching between modes. If the thermostat is off (screen blank), a short press of the ON/OFF/MODE button turns it on, displaying measured temperature, humidity, fan speed, and target temperature for the selected mode (heating or cooling).

To turn the thermostat OFF, hold the ON/OFF/MODE button for 3 seconds.

Temperature adjustment:

Use the up and down buttons (⬆️, ⬇️) to adjust the target temperature. The target temperature cannot be adjusted in Ventilation mode. The step of increase/decrease can be further configured via a downlink.

Mode selection:

By default, the device supports 3 operating modes: heating/cooling/ventilation. Some modes may be disabled depending on the Fan Coil Unit's wiring diagram. For example, a 2-pipe fan coil unit can only heat or cool, not both year-round. In such cases, short-pressing the ON/OFF/MODE button switches between heating/ventilation or cooling/ventilation, based on the allowed operational modes. If a 10k NTC is connected to IO1 and IO2, the FCT independently determines allowed modes based on whether the system circulates hot or cold water.

Fan Speed:

To change the fan speed, press the FAN button. You can cycle through the allowed fan speeds based on your wiring diagram (e.g., ECM fans have 6 speeds). Fan speed selection can be limited via a downlink, for instance, to allow only the first and second speeds.

Connectivity and Smart Building Features

Explanation of LoRaWAN Class C connectivity:

LoRaWAN Class C enables devices to constantly listen for commands from gateways. The device sends information only at the keepalive interval or upon changes in target temperature/mode/fan speed. Unlike Class A devices, the FCT can receive commands from the Application/Network server in real-time.

Integration with MClimate Enterprise:

The device is compatible with MClimate Enterprise, our Building Management Software, which provides monitoring and control capabilities for MClimate devices. Refer to our website for instructions on adding your MClimate FCT to Enterprise.

Integration with Building Management Systems (BMS) and Building Automation Systems (BAS):

To integrate the MClimate FCT into an existing BMS/BAS system, use a special gateway that translates the LoRaWAN signal and exposes device points as Modbus or BACnet objects. Visit our website for up-to-date information on available LoRaWAN <> BMS gateways.

Wiring Diagrams

Heating and cooling with 3-speed fan:

• 00: 2-pipe ON/OFF (220VAC); 1-3 speeds fan.
• 01: 2-pipe ON/OFF 3-wire valve (220VAC); 1-3 speeds fan.
• 02: 4-pipe ON/OFF (220VAC); 1-3 speeds fan.

Heating and cooling with ECM Fan:

• 03: 4-pipe ON/OFF (220VAC); ECM FAN.
• 04: 2-pipe ON/OFF (220VAC); ECM FAN.
• 05: 2-pipe 3-wire ON/OFF (220VAC); ECM FAN.

All diagrams show terminal connections (IO1, IO2, NC, C, NO, N, V1, Q1, Q2, Q3, L) and indicate multipurpose input/output functions (occupancy, auto change-over, etc.).