ESTR23 - Thermometer JUNG - Free user manual and instructions

Product Type	Room Temperature Controller (Thermostat)
Model	ESTR23 (Compatible with insert models TR 231 U, TR 241 U, TR 236 U, TR 246 U)
Power Supply	AC 230 V~ (TR 231 U, TR 236 U) or AC 24 V~ (TR 241 U, TR 246 U)
Nominal Current	10 A (resistive) / 4 A (inductive) for break contact; 5 A (resistive) / 2 A (inductive) for changeover cooling
Temperature Range	5 °C to 30 °C (adjustable, can be restricted via internal rings)
Switching Differential	Approx. 0.5 K
Temperature Reduction	Approx. 4 K (with external clock signal, only on TR 231 U / TR 241 U)
Switch / LED	ON/OFF switch with status LED (TR 231 U, TR 241 U); no switch (TR 236 U, TR 246 U)
Switching Contact	1-pole break contact (TR 231 U, TR 241 U); 1-pole changeover contact (TR 236 U, TR 246 U)
Mounting	Flush-mounted in switch box per DIN 49073; mounting height approx. 1.5 m above floor
Conductor Cross-Section	1 to 2.5 mm² solid conductor
Dimensions (approx.)	80 mm x 80 mm x 30 mm (frame and flush insert)
Weight (approx.)	100 g
Operating Temperature	0 °C to 50 °C (ambient)
Humidity	Max. 95 % relative humidity, no condensation
Energy Class	I = 1% (for temperature reduction function)
Accessories Included	Insert, cover, setting knob, rocker, center plate, frame
Available Spare Parts	Inserts (TR 231 U, TR 241 U, TR 236 U, TR 246 U), covers (..TR 231 PL.. etc.), special knob (MS TR 231 ..)
Cleaning	Use a dry, soft cloth. Do not use any cleaning agents or solvents.
Safety Instructions	Installation by qualified electricians only; disconnect power before working on device; avoid moisture.

Frequently Asked Questions - ESTR23 JUNG

What is the difference between TR 231 U and TR 236 U?

The TR 231 U has an ON/OFF switch with status LED and a 1-pole break contact, while the TR 236 U has no switch and uses a 1-pole changeover contact (for heating/cooling).

How do I limit the temperature setting range?

Remove the setting knob, then use a pen tip to adjust the red ring for maximum temperature (anti-clockwise) and the blue ring for minimum temperature (clockwise). The dial markings indicate the limits. Reattach the knob with the pointer at the center of the new range.

What does the temperature reduction feature do?

The temperature reduction (approx. 4 K) allows lowering the set temperature when a clock signal is applied to the separate terminal, useful for night setback or energy saving. This feature is available only on TR 231 U and TR 241 U models.

Can I use the thermostat for cooling?

Yes, the TR 236 U and TR 246 U models have a changeover contact that can be used for cooling. The nominal current for cooling is 5 A resistive (2 A inductive).

What is the recommended mounting location?

Mount the thermostat on an internal wall opposite heat sources, at about 1.5 m above floor. Avoid external walls, drafts, direct sunlight, and nearby heat-emitting devices like lamps or dimmers.

Is a neutral conductor required?

Yes, a neutral conductor (N) is required. Ensure it is connected to the N terminal to avoid temperature fluctuations.

How do I connect the thermostat for heating?

Follow the wiring diagram in the manual. Typically, connect L, N, and load. For models with temperature reduction, connect the clock signal to terminal ①. Use conductor cross-section 1 – 2.5 mm² solid.

What does the status LED indicate?

On TR 231 U and TR 241 U, the LED lights up when the switch is ON and the contact is closed (i.e., when heating is active). When the set temperature is reached, the contact opens and the LED turns off.

Can I replace the cover or knob?

Yes, the thermostat is modular. Available accessories include covers (e.g., ..TR 231 PL..) and a special knob (MS TR 231 ..) for customization or replacement.

What should I do if the manual is not in my language?

On the notice-facile.com page, you can request a translated manual by selecting your language and providing your email. A translated version will be sent to you.

USER MANUAL ESTR23 JUNG

Room temperature controller

GB

Ref.-no.: TR .. 231 ..

TR .. 241 ..

TR .. 236 ..

TR .. 246 ..

Operating instructions

1 Safety instructions

Electrical devices may only be mounted and connected by electrically skilled persons.

Serious injuries, fire or property damage possible. Please read and follow manual fully.

Danger of electric shock. Always disconnect before carrying out work on the devise or load.

A relative air humidity of max. 95% may not be exceeded. Avoid any moisture condensation.

These instructions are an integral part of the product, and must remain with the end customer.

2 Structure of the device

The room temperature controller is used to regulate the temperature in closed rooms such as flats, schools, function suites, workshops, etc.

Product characteristics

Neutral conductor required

TR 231 U / TR 241 U:

• Separate terminal for temperature reduction of 5 K (e.g. during night time)
• ON/OFF switch with status LED

- When set temperature is reached the contact opens up.

TR 236 U / TR 246 U:

• No OFF-position
• Without switch and control LED
• When set temperature is reached the NO/NC contact switches over.

4 Information for electrically skilled persons

Installation and electrical connection

DANGER

Electric shock from touching live parts in the installation environment.

An electric shock can be fatal.

Before working on the device, disconnect the power and cover live parts in the area.

• Mount the room temperature controller on an internal wall opposite the heat source if possible.
• Do not mount the room temperature controller on outside walls.
• Avoid draughts from windows and doors.
• Ensure that the normal air circulation in the room reaches the controller without any obstacles.
• External heat sources influence the accuracy of the controller. Avoid direct sunlight and do not place heat-emitting devices in the vicinity of the room temperature controller (heaters, lamps, etc.).
• Dimmers also generate heat.
  If a controller is installed in a common switch frame with a dimmer, the distance between them should be as great as possible. When arranging them vertically, the controller must be installed underneath the dimmer.

Connection

Fig. 2: TR 231 U

Fig. 3: TR 241 U

Fig. 4: TR 236 U

Fig. 5: TR 246 U

- Carry out the electrical connection according to the respective wiring diagram.

i Ensure that the neutral conductor N is connected to terminal N. Considerable fluctuations in temperature may otherwise occur.

Conductor cross-section: 1 to 2.5 mm² solid conductor

Symbols used in the wiring diagram

L = L conductor

N = N-conductor

AC1 = 24 V power supply

AC2

① = Connection for clock signal to reduce temperature

= Heating

※ = Cooling

RF = Resistor for thermal feedback

TA = Resistor for night reduction of room temperature

Installation

- Mount room temperature controller in a switch box in accordance with DIN 49073.

Mounting height: approx. 1.5 m above the floor

- Clip the rocker (4) on the switch in the flush insert. (fig. 1)

- Place the center plate together with the frame on the flush insert. The center plate must snap in place in the top left of the housing base.

• Tighten the screw (5). (fig. 1)

- Clip on the setting knob (6). (fig. 1)

5 Operation

Restricting the temperature setting range

The temperature controller is set ex works to the maximum setting range of 5 °C to 30 °C.

Fig. 6: Temperature setting range

Two adjustment rings are located in the setting knob. You can use these rings to restrict the temperature setting range required e.g. between 8 °C and 23 °C.

Procedure:

- Select the temperature limits.

Example: min 8 °C, max. 23 °C

- Important!

First position the setting knob roughly in the centre of the required setting range.

Example: The centre point between 8 °C and 23 °C is approximately 15 °C.

- Now remove the setting knob.

- Set the red locating ring to the max. temperature limit.

Example: 23 °C

- Rotate anti-clockwise.

The numbers on the outer dial apply!

- Insert the tip of a pen in the hole and turn the red ring to the left until it reaches 23^ (max. scale).

Fig. 7: Temperature setting range max.

- Set the blue locating ring to the min. temperature limit.

Example: 8 °C

- Rotate clockwise.

The numbers on the inner dial apply.

- Insert the tip of a pen in the hole and turn the blue ring to the right until it reaches 8^ C (min. scale).

Fig. 8: Temperature setting range min.

- Clip on the setting knob.

The pointer must be roughly in the centre of the new setting range.

Example: approx. 15 °C

Scale for setting the temperature with dials

1 = approx. 5 °C

2 = approx. 10 °C

3 = approx. 15 °C

4 = approx. 20 °C

5 = approx. 25 °C

6 = approx. 30 °C

Symbols

O Off

I On

6 Technical data

TR 231 U / TR 241 U:

Switching principle 1-pole break contact

+ on/off switch

Temperature range 5 ... 30 °C

Nominal voltage

TR 231 U AC 230 V \~

TR 241 U AC 24 V \~

Nominal current* 10 (4) A

Differential of

functioning temperature approx. 0.5 K

Temperature reduction approx. 4 K

Energy class I = 1 %

The value in brackets indicates the inductive load at a cos φ of 0.6.

TR 236 U / TR 246 U:

Switching principle 1-pole change over contact

without switch

Temperature range 5 ... 30 °C

Nominal voltage

TR 236 U AC 230 V \~

TR 246 U AC 24 V \~

Nominal current*

Heating 10 (4) A

Cooling 5 (2) A

Differential of

functioning temperature approx. 0.5 K

* The value in brackets indicates the inductive load at a cos φ of 0.6.

7 Accessories

Inserts

TR 231 U

TR 241 U

TR 236 U

TR 246 U

Covers

.. TR 231 PL ..

.. TR 241 PL ..

.. TR 236 PL ..

.. TR 246 PL ..

Special knob

MS TR 231 ..

8 Warranty

The warranty follows about the specialty store in between the legal framework as provided for by law.