UT238E - Thermostat JUNG - Free user manual and instructions
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| Product Type | Thermostat |
| Brand | JUNG |
| Model | UT238E |
| Application | Room temperature control for heating systems |
| Display | LCD screen |
| Power Supply | 2x AAA batteries (1.5 V) |
| Dimensions (H x W x D) | 80 x 80 x 30 mm |
| Weight | Approx. 120 g |
| Temperature Range | 5 °C to 30 °C |
| Temperature Accuracy | ±0.5 °C |
| Control Type | Electronic, programmable |
| Programming | Daily and weekly scheduling |
| Special Functions | Frost protection, holiday mode, manual override |
| Communication | None (standalone device) |
| Installation | Wall-mounted (flush or surface) |
| Compatibility | Standard heating systems (gas, electric, oil, heat pump) |
| Maintenance | Clean with a dry cloth; do not use solvents |
| Safety Features | Overheat protection, child lock |
| Spare Parts | Batteries (user-replaceable) |
| Repair | Not user-serviceable; contact qualified technician |
| Certifications | CE, RoHS |
Frequently Asked Questions - UT238E JUNG
How do I set the desired temperature on the UT238E thermostat?
Press the '+' or '-' buttons to adjust the temperature. The set temperature will flash on the LCD display. Confirm by pressing the center button or waiting a few seconds.
How do I change the batteries?
Remove the thermostat from its wall plate by gently pulling it off. Replace the two AAA batteries with new ones, ensuring correct polarity. Reattach the thermostat to the wall plate.
How can I reset the thermostat to factory settings?
Press and hold the 'Menu' button for 10 seconds until the display resets. Alternatively, remove the batteries, wait 30 seconds, and reinsert them.
How do I program a weekly heating schedule?
Enter the programming mode by pressing the 'Menu' button. Use the arrow keys to select the day and time, then set the desired temperature for each period. Save by pressing 'OK'.
What does the frost protection function do?
Frost protection keeps the room temperature at a minimum of 5 °C to prevent pipes from freezing when the heating is off. It activates automatically when the temperature drops too low.
Is the UT238E compatible with my existing heating system?
The UT238E is designed for most standard heating systems, including gas, electric, oil, and heat pumps. For specific compatibility, consult a qualified installer or check the manual.
What are the dimensions of the thermostat?
The UT238E measures 80 x 80 x 30 mm (height x width x depth). It fits standard wall boxes.
How long do the batteries last?
Battery life is approximately 1 year under normal use, depending on room temperature and backlight settings. Replace when the low battery indicator appears.
Can I use the thermostat with a smart home system?
No, the UT238E is a standalone thermostat without wireless connectivity. It does not integrate with smart home systems.
What should I do if the display shows an error code?
Common error codes: E1 (sensor failure) - try resetting; E2 (low battery) - replace batteries; E3 (communication error) - check wiring. If persists, contact JUNG support.
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