Möhlenhoff Alpha Direct LCD Comfort 230V Room Thermostat User Manual

1. Introduction

The Möhlenhoff Alpha Direct LCD Comfort 230V is a high-quality room thermostat designed to accurately detect and regulate the desired room temperature, ensuring optimal comfort. This device facilitates simple and efficient control of individual rooms, particularly when connected directly to compatible servo motors.

2. Key Features

• Superior room temperature detection and regulation capabilities.
• Direct connection to servo motors for precise individual room control.
• Seamless integration with the Alpha Basis direct connection unit for a comprehensive system solution.
• Comfortable rotary knob for intuitive temperature setting with a clear display.
• Simple and intuitive installation, operation, and overall system maintenance.
• Excellent value for money.
• Slim design and compact dimensions (86 x 86 x 31 mm).
• Large, clear LCD display with backlight for enhanced visibility, even in low-light conditions.
• Includes dedicated heating and cooling comfort programs.
• Supports standalone operation or integration within a larger system.
• Setpoint calibration functionality.
• Modern, high-quality design aesthetic.
• High functional safety.
• Temperature setback input for energy-saving temperature reduction.
• Integrated valve function and frost protection.
• Compatible with both NC (Normally Closed) and NO (Normally Open) operation modes.

3. Setup and Installation

3.1 Safety Instructions

WARNING: Always disconnect the main power supply before attempting any installation or wiring. Installation should only be performed by a qualified electrician in accordance with local electrical codes and regulations.

3.2 Mounting

The thermostat is designed for surface wall mounting. Choose a suitable location away from direct sunlight, drafts, or heat sources that could affect temperature readings.

Figure 1: Front view of the Möhlenhoff Alpha Direct LCD Comfort 230V Room Thermostat. This image shows the rectangular LCD screen at the top, a circular rotary knob below it, and the Möhlenhoff logo in the bottom right corner, all on a white casing.

3.3 Wiring

Connect the thermostat according to the wiring diagram provided with your product packaging. Key connection specifications are:

• Operating Voltage: 230 V ± 10% 50 Hz
• Connection Cable: NYM-O 5 x 1.5 mm²
• Connection Terminals: 8 screw terminals, suitable for 0.22 - 1.5 mm² wires
• Switching Capacity: 1 A ohmic load, 200 VA inductive
• Maximum Actuators: Up to 5 actuators (max. 3 W per actuator)
• Actuator Connection Type: NC (Normally Closed) / NO (Normally Open)

Figure 2: Side view of the Möhlenhoff Alpha Direct LCD Comfort 230V Room Thermostat. This image shows the depth of the white casing and the rotary knob protruding from the front, providing a perspective of its compact dimensions.

4. Operating Instructions

4.1 Power On

Once properly installed and powered, the LCD display will illuminate, indicating the thermostat is operational.

4.2 Temperature Setting

To adjust the desired room temperature, rotate the comfortable rotary knob. The selected setpoint temperature will be clearly displayed on the LCD screen.

4.3 Heating/Cooling Mode

The thermostat supports both heating and cooling modes. The active mode is typically configured during system setup or can be selected via advanced settings, if available. Refer to your complete system manual for specific mode selection procedures.

4.4 Comfort Programs

Utilize the pre-programmed comfort settings for heating and cooling to optimize energy usage and maintain desired temperatures throughout the day. Detailed instructions for programming and customizing these settings can be found in the comprehensive system manual.

4.5 Temperature Setback

If configured, an external signal can activate the temperature setback function, which temporarily lowers the room temperature to save energy during unoccupied periods.

4.6 Frost Protection

The thermostat includes an automatic frost protection function. If the ambient temperature drops below 5°C, the heating system will activate automatically to prevent freezing.

5. Maintenance

5.1 Cleaning

To clean the thermostat, gently wipe the display and casing with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the device.

5.2 Service

The Möhlenhoff Alpha Direct LCD Comfort 230V thermostat contains no user-serviceable parts. Do not attempt to open, disassemble, or repair the device yourself. Any unauthorized tampering will void the warranty and may pose a safety risk.

6. Troubleshooting

If you encounter issues with your thermostat, please refer to the following common problems and solutions:

• Display is blank:
  Check the main power supply (230V) to the thermostat. Ensure all electrical connections are secure and correctly wired.
• Temperature not regulating as expected:
  Verify that the desired setpoint temperature is correctly entered. Confirm that your heating/cooling system is operational and that all connected actuators are functioning properly.
• Inaccurate temperature reading:
  The thermostat features a setpoint calibration function. If you suspect an inaccurate reading, refer to the advanced settings section of your system manual for instructions on how to perform calibration.
• Frost protection not activating:
  Ensure the ambient temperature has dropped below 5°C. Confirm that the thermostat is powered and correctly configured for frost protection.

If these steps do not resolve the issue, please contact customer support or a qualified technician.

7. Technical Specifications

8. Warranty and Support

8.1 Warranty Information

Information regarding the warranty terms and conditions for your Möhlenhoff Alpha Direct LCD Comfort 230V thermostat is typically provided with your purchase documentation. Please refer to your sales receipt, warranty card, or contact your retailer for specific details regarding coverage and duration.

8.2 Customer Support

For technical assistance, product inquiries, or further support, please contact Möhlenhoff customer service or your authorized dealer. Contact details can usually be found on the manufacturer's official website or in your product packaging.