AFTR231PL - Underfloor heating JUNG - Free user manual and instructions
Find the device manual for free AFTR231PL JUNG in PDF.
Pick your language and provide your email: we'll send you a specifically translated version.
| Product Type | Underfloor Heating Thermostat |
| Brand | JUNG |
| Model | AFTR231PL |
| Dimensions (H x W x D) | 86 mm x 86 mm x 40 mm |
| Weight | Approx. 150 g |
| Power Supply | 230 V AC, 50/60 Hz |
| Max Load | 16 A (resistive), 4 A (inductive) |
| Display | LCD with backlight |
| Temperature Range | 5 °C to 40 °C |
| Temperature Control | Proportional-Integral (PI) control |
| Protection Class | IP21 |
| Mounting | Wall-mounted (flush or surface) |
| Compatible Floor Probes | NTC 10kΩ at 25°C |
| Programming | Daily/weekly schedule, 6 time periods per day |
| Manual Override | Yes (temporary hold) |
| Frost Protection | Yes (activates below 5°C) |
| Child Lock | Yes (keypad lock) |
| Maintenance | Clean with a dry cloth; do not use solvents |
| Security | SELV, overheat protection |
| Spare Parts / Repairability | Replacement probes available; contact JUNG service |
| General Information | Designed for electric underfloor heating systems |
Frequently Asked Questions - AFTR231PL JUNG
What is the proper way to install the AFTR231PL thermostat?
Ensure the power supply is turned off. Mount the thermostat at a height of about 1.5 m from the floor, away from direct sunlight and drafts. Connect the floor probe and load according to the wiring diagram in the manual. After installation, restore power and configure the settings.
How do I program the weekly schedule on the JUNG AFTR231PL?
Press the menu button until 'Prog' appears. Use the up/down buttons to select the day, then set the time and temperature for each period (up to 6 per day). Confirm each step with OK. Save the schedule and exit.
Why is my floor heating not turning on?
Check if the thermostat has power (display lit). Verify that the set temperature is higher than the current room temperature. Ensure the schedule is active and not in 'Off' or 'Frost' mode. If still not working, test the floor probe resistance.
Can I use the AFTR231PL with a water-based underfloor heating system?
No, this thermostat is designed specifically for electric underfloor heating systems. For water-based systems, you need a different type of thermostat.
How do I reset the thermostat to factory defaults?
Press and hold the 'Menu' and 'Down' buttons simultaneously for 5 seconds. The display will show 'rES'. Confirm with 'OK' to reset all settings to factory defaults.
What type of floor sensor does the AFTR231PL require?
It requires an NTC 10kΩ sensor at 25°C. Use only the compatible JUNG floor probe or a certified equivalent.
How can I enable the child lock?
Press and hold the 'Up' and 'Down' buttons simultaneously for 3 seconds. A key icon appears on the display, indicating the keypad is locked. Repeat to unlock.
What is the maximum load the thermostat can handle?
The maximum resistive load is 16 A (about 3680 W at 230 V). For inductive loads, the max is 4 A.
How do I calibrate the temperature reading?
Enter the menu, navigate to 'CAL', and adjust the offset in steps of 0.5°C (from -5°C to +5°C). Confirm with OK.
What should I do if the display shows an error code?
Refer to the manual for error code meanings. Common codes: E1 (sensor short circuit), E2 (sensor open circuit). Check the probe connections and replace the sensor if needed. If the problem persists, contact JUNG support.
User questions about AFTR231PL JUNG
0 question about this device. Answer the ones you know or ask your own.
Ask a new question about this device
No questions yet. Be the first to ask one.
Download the instructions for your Underfloor heating in PDF format for free! Find your manual AFTR231PL - JUNG and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. AFTR231PL by JUNG.