The SALUS 091Pro-RF thermostat (TX) and the RX receiver are paired at the factory. This means no setup is needed when you first start the system.But sometimes, you need to re-pair the devices – for example, after a reset, device replacement, or RF signal problems.

This article explains how to do this safely and correctly.

When should you re-pair the devices?

• After a Factory Reset of the thermostat
• After replacing the TX thermostat or RX receiver
• If the thermostat doesn’t control the receiver, even with correct settings
• If the red LED on RX blinks (no RF connection)

What is pairing?

Pairing connects the RF signal between the thermostat and the receiver.

• After pairing, the thermostat will send signals only to its own receiver
• The receiver ignores other devices – this makes the system safe

How to Re-pair – Step by Step

Step 1 – Set RX to Pairing Mode

1. Make sure the receiver is ON (switches: ON + AUTO)
2. Press and hold the PAIR button (on the side of RX) for about 3 seconds
   
3. The green LED will blink – RX is ready to pair
   
4. Pairing mode lasts 10 minutes – if time runs out, repeat this step
   

Step 2 – Enable Pairing on the Thermostat (TX)

1. On the thermostat, press and hold OK for 5 seconds to enter the service menu
2. Use ▲ / ▼ to scroll to PAIRING
   
3. Choose “YES” and press OK to confirm
   
4. The thermostat sends the pairing signal to RX
   
   

Step 3 – Check the Result

If pairing is successful:

• The green LED on RX stops blinking and stays ON (solid)
• The thermostat returns to the main screen

If not – repeat the process

How to Test the Connection

1. Set the thermostat to Manual Mode
2. Increase the temperature (e.g. to 25°C)
   
1. You should hear a “click” and the green LED lights up on RX
3. Lower the temperature
   
1. The relay should turn OFF