1. Introduction
This manual provides instructions for the Acova IRS Hot Water Remote Control, model 894680. This remote control is specifically designed to operate the infrared (IRS) fan unit of hot water radiators. It is not compatible with electric towel dryers or electric radiators.
The Acova IRS Hot Water Remote Control 894680 is compatible with specific hot water radiator ranges such as Regate Twist Air, Roda Air, and CALA Air. Please note that the ACOVA brand is part of the ZEHNDER Group, and similar products may be marketed under the ZEHNDER or 'No Name' brands. This remote control may also be compatible with certain IR fan radiator models from these brands.
If you have any doubts regarding the compatibility of the 894680 reference with your specific installation, please contact the manufacturer ZEHNDER or your supplier for assistance before attempting installation or use.
2. Safety Information
To prevent any electrical hazards, always ensure the power supply to the radiator or heating system is disconnected before performing any installation, maintenance, or intervention. If you are uncertain about proper installation procedures, do not proceed. Seek advice from a qualified electrician or heating professional.
3. Setup
3.1. Battery Installation
The remote control requires two LR03 (AAA) batteries, which are supplied. To install the batteries:
- Locate the battery compartment cover on the back of the remote control.
- Slide or unclip the cover to open the compartment.
- Insert the two LR03 (AAA) batteries, ensuring the correct polarity (+ and -) as indicated inside the compartment.
- Replace the battery compartment cover securely.
3.2. Initial Pairing (if required)
Upon first use or after battery replacement, the remote control may need to be paired with your hot water radiator's IRS fan unit. Refer to your specific radiator's instruction manual for detailed pairing procedures, as this can vary by model. Generally, this involves activating a pairing mode on both the radiator and the remote control.

Front view of the Acova IRS Hot Water Remote Control, model 894680. It features a square LCD screen at the top, with control buttons below. From left to right, the buttons are: Power (on/off), Plus (+), Boost, Minus (-), P1, and P2. The 'ACOVA' brand name is visible at the bottom right.
4. Operating Instructions
The remote control features an LCD display showing the current time and temperature settings, along with several control buttons.
4.1. Basic Controls
- Power Button (⏻): Press to turn the radiator's fan unit on or off.
- Plus (+) Button: Increases the setpoint temperature or adjusts programming values.
- Minus (-) Button: Decreases the setpoint temperature or adjusts programming values.
- Boost Button: Activates a temporary boost function for rapid heating. The duration of the boost may be pre-set or programmable (typically 15 minutes to 2 hours).
- P1 / P2 Buttons: Used for accessing and setting programmed heating schedules.
4.2. Setting Temperature
To adjust the desired room temperature (setpoint):
- Ensure the remote control is active and communicating with the radiator.
- Use the Plus (+) or Minus (-) buttons to increase or decrease the setpoint temperature. The temperature can be set between 7°C and 28°C, in 0.5°C increments.
- The new setpoint will be displayed on the LCD screen and transmitted to the radiator.
4.3. Daily Programming
The remote control supports daily programming, allowing you to set specific heating schedules. The programming duration can range from 15 minutes to 2 hours.
- Press the P1 or P2 button to enter programming mode. The display may show a flashing time or temperature.
- Use the Plus (+) and Minus (-) buttons to adjust the desired time slots and temperature settings for your daily schedule.
- Follow the on-screen prompts or refer to the detailed programming section of your radiator's main manual for specific steps, as programming sequences can be complex.
- Confirm your settings to save the program.
Note: Some users have reported difficulty with programming due to small display characters and complex button combinations. Patience and careful attention to the display are recommended.
5. Maintenance
The Acova IRS Hot Water Remote Control requires minimal maintenance.
- Cleaning: Wipe the remote control with a soft, dry cloth. Do not use abrasive cleaners, solvents, or excessive moisture, as these can damage the device.
- Battery Replacement: Replace batteries when the low battery indicator appears on the display, or if the remote control's responsiveness decreases. Always use new LR03 (AAA) batteries.
- Storage: If storing the remote control for an extended period, remove the batteries to prevent leakage.
6. Troubleshooting
- Remote control not responding:
- Check if the batteries are correctly inserted and not depleted. Replace if necessary.
- Ensure there are no obstructions between the remote control and the radiator's IRS receiver.
- Verify that the remote control is within the effective range of the radiator's receiver.
- Radiator not responding to commands:
- Confirm that the remote control model 894680 is indeed compatible with your specific hot water radiator's IRS fan unit. This remote is not for electric radiators or older models without an infrared receiver.
- Ensure the radiator itself is powered on and functioning correctly.
- Attempt to re-pair the remote control with the radiator if the connection seems lost (refer to Section 3.2 and your radiator's manual).
- Difficulty reading the display or programming:
- The display characters are small. Ensure adequate lighting and adjust your viewing angle.
- Programming can be intricate. Take your time and follow the steps precisely. If available, consult the detailed programming section of your radiator's main instruction manual.
7. Specifications
- Brand: Acova (Zehnder Group)
- Model Number: 894680 (Old Acova code: U11560-S)
- Intended Use: Control of IRS fan units on hot water radiators
- Setpoint Temperature Range: 7°C to 28°C (0.5°C increments)
- Daily Programming: From 15 minutes to 2 hours
- Display: Time and Temperature
- Compatibility: Pilot wire - 6 orders (for radiator system)
- Power Supply: 2 x LR03 (AAA) batteries (supplied)
8. Warranty and Support
For warranty information, please refer to the documentation provided with your original purchase or contact your retailer. For technical support or inquiries regarding product compatibility, please contact the ZEHNDER Group or your product supplier.
Spare parts availability information is currently unavailable.





