TRAL231 - Thermostat JUNG - Free user manual and instructions
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| Product Type | Room Thermostat |
| Brand | JUNG |
| Model | TRAL231 |
| Application | Temperature control in residential and commercial spaces |
| Temperature Adjustment Range | 5 °C to 30 °C |
| Switching Differential | Approx. 0.5 K |
| Power Supply | 3 V DC, 2 x AA batteries (not included) |
| Output Contact | Voltage-free relay, max. 3 A at 250 V AC |
| Display | LCD with temperature and status indication |
| Mounting | Wall-mounted with screws or flush-mounted on socket outlet |
| Dimensions (H x W x D) | 75 x 75 x 32 mm |
| Weight | Approx. 120 g (including batteries) |
| Protection Rating | IP20 |
| Ambient Operating Temperature | 0 °C to 50 °C |
| Storage Temperature | -20 °C to 70 °C |
| Electrical Safety | Double insulated, protection class II |
| Cleaning and Maintenance | Wipe with a dry, soft cloth; replace batteries when battery indicator lights |
| Spare Parts | Standard AA batteries; support frame (type 540) available as accessory |
| Repair | No user-serviceable internals; contact a licensed electrician or JUNG support for defects |
| General Information | This thermostat is intended for fixed installation in dry indoor rooms. Not suitable for direct connection to heating systems without controller. |
Frequently Asked Questions - TRAL231 JUNG
How do I set the desired temperature on the JUNG TRAL231?
Turn the rotary knob on the front of the device until the desired temperature value appears on the LCD display. The setpoint can typically be adjusted from 5 °C to 30 °C. After a few seconds, the display returns to current room temperature and the thermostat automatically controls the heating.
What batteries does the TRAL231 require?
Use two AA 1.5 V batteries, preferably alkaline type. Insert them into the battery compartment located on the backplate or under the cover. Make sure the polarity is correct.
How do I know when the batteries are low?
The thermostat has a battery indicator on the LCD display. When the battery symbol blinks, the batteries should be replaced soon to maintain accurate temperature control.
Can I use the TRAL231 with electric underfloor heating?
Yes, if the heating system is controlled by a voltage-free relay. The output relay closes when heating is requested, allowing it to switch the contactor or actuator of the electric floor heating. Ensure the maximum switching capacity is not exceeded (3 A at 250 V AC).
What is the maximum load the relay can switch?
The relay contact is rated at 3 A / 250 V AC for resistive loads. For inductive loads (e.g. pumps, valves), use a suitable contactor or reduce the load accordingly.
How should I clean the thermostat?
Clean the housing with a dry, soft cloth. Do not use water, solvents, or abrasive cleaners. Make sure no moisture enters the device.
Why does the display show the room temperature but the heating does not turn on?
Check the setpoint: it may be set lower than the current room temperature. Also verify that the batteries are not empty and that the relay wiring is correct. If the problem persists, contact an electrician.
Is there a frost protection function?
Some models have a frost protection setting around 5 °C. If your TRAL231 has it, you can turn the knob to the snowflake symbol to maintain a minimum temperature and prevent freezing.
Can the thermostat be installed in a damp room like a bathroom?
The device has an IP20 protection rating, which means it is only protected against solid objects larger than 12 mm, not against water. Therefore, it should be installed outside zone 1 and 2, preferably in a dry area.
Does the TRAL231 support smart home protocols like Zigbee or KNX?
The TRAL231 is a stand-alone thermostat and does not support wired KNX or wireless smart home protocols directly. It operates via its local temperature sensor and relay output. For smart home integration, consider a JUNG KNX or Zigbee thermostat instead.
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USER MANUAL TRAL231 JUNG
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Product information
Brand : JUNG
Model : TRAL231
Category : Thermostat