User Manual for Danfoss CF-RU Repeater Unit

Quick guide from the manual

The Danfoss CF-RU Repeater Unit is designed to extend the transmission range of your heating system. It is used when system components cannot reach the Controller or when the link test is unsatisfactory. Up to three repeaters can be installed in a chain to extend the range.

Functional Overview

The device features a red LED indicator behind the front cover and a push button for installation and testing.

• Permanent light: ON
• No light: OFF
• Slow flashing: Flashes
• Fast flashing: Flickers

Installation

Before permanent mounting, temporarily connect the repeater to a 230V outlet near the Controller to perform the installation.

Installation in the CF2 system

1. Activate Install mode on the Master Controller using the menu selection button. The Install LED will flash. Press OK to activate.
2. Release the front cover of the repeater.
3. Press the push button on the repeater. The LED will flicker during communication.
4. If installation is satisfactory, the LED goes OFF. If not, it flashes 5 times.

Installation in the Danfoss Link system

1. Install the repeater on the Danfoss Link CC by adding it as a service device (refer to the Danfoss Link CC manual).
2. Release the front cover of the repeater.
3. Press the push button. The LED will flicker during communication.
4. If installation is satisfactory, the LED goes OFF. If not, it flashes 5 times.

Placing and Mounting

Once assigned, disconnect the repeater from the temporary power supply.

• Place the repeater between the Controller and the Room Thermostat.
• Connect it to a 230V power supply.
• Verify transmission by performing a link test from the repeater.
• Mount the back plate to the wall using the provided screws and wall plugs.
• Slide the repeater onto the back plate and secure it if desired by turning the lock 90 degrees with a 2mm hex key.

Transmission Test

To initiate a test from the repeater:

1. Press the push button. The LED goes ON.
2. If the test is satisfactory, the LED goes OFF.
3. If the test is unsatisfactory, the LED flashes 5 times.

Factory Reset

1. Disconnect the repeater from the power supply.
2. Release the front cover.
3. Press and hold the push button.
4. While holding the button, plug the power supply back in.
5. Release the button when the LED goes ON and then OFF.

Specifications

• Transmission frequency: 868.42MHz
• Transmission range: Up to 30m in buildings
• Max repeaters in a chain: 3
• Supply voltage: 230V AC / 4.5V
• Ambient temperature: 0-50°C
• IP class: 21

Troubleshooting

If the LED flashes 5 times, the installation or link test is unsatisfactory. Try relocating the repeater or adding additional repeaters between the Controller and the Room Thermostat.