ALFTR231PL - Uncategorized JUNG - Free user manual and instructions

Type	Floor heating controller (control unit + remote sensor)
Operating voltage	AC 230 V ~ 50/60 Hz
Temperature setting range	10…50 °C (dial positions ※ to 6)
Switching capacity	2.3 kW (resistive load, max 10 A)
Relay contact	1 make contact (non‑floating)
Switching differential	approx. 1 K
Temperature reduction (via external timer)	approx. 5 K
LED indicators	Red: heating mode (heat request); Green: temperature reduction active
Sensor element	NTC thermistor
Sensor cable	PVC, 2×0.75 mm², 4 m (extendable up to 50 m with 1.5 mm² cable)
Sensor protection class	IP67 (EN 60529)
Control unit protection class	IP30 (EN 60529)
Protection class (device)	Class II (if installed appropriately)
Operating temperature (control unit)	0…+40 °C
Storage temperature (control unit)	‑25…+70 °C
Operating / storage temperature (sensor)	‑20…+70 °C
Dimensions (control unit, approx.)	71 × 71 × 30 mm (typical switch box mounting)
Weight (control unit, approx.)	0.15 kg
Standards	DIN EN 60730‑1, VDE 0875 / EN 55014
Connection terminals	Solid conductor 1 – 2.5 mm²; no PE conductor required (PE only for looping)
Mounting	In switch box according to DIN 49073; with supporting frame on wallpaper
Temperature range restriction	Adjustable via two rings in setting knob (5 – 30 °C range)

Frequently Asked Questions - ALFTR231PL JUNG

How do I set the desired floor temperature?

Turn the setting knob to the desired number. The numbers ※ to 6 correspond to a temperature range of 10 °C to 50 °C. Always follow the floor heating manufacturer's instructions.

What do the red and green LEDs indicate?

The red LED lights up when the controller requests heat (heating mode). The green LED indicates that a temperature reduction (e.g., via an external time switch) is active, lowering the floor temperature by approximately 5 K.

Can I restrict the temperature setting range?

Yes. There are two adjustment rings inside the setting knob that limit the range between 5 °C and 30 °C. Refer to the diagram in the manual (Abb. 5) for correct positioning.

How do I install the remote sensor?

The sensor must be laid in a conduit to protect it from moisture and allow easy replacement. Connect it to the NTC terminals on the control unit. The cable can be extended up to 50 m using a 2‑core 1.5 mm² cable (shielded if near power lines).

What happens if the sensor is interrupted or short‑circuited?

If the sensor is interrupted, the relay contact closes (heating on). If the sensor is short‑circuited, the relay contact opens (heating off). Always disconnect mains power before working on the load circuit.

Can I use an external timer for night setback?

Yes. Connect an external time switch to the TA terminal. When activated, the controller lowers the floor temperature by approximately 5 K, and the green LED turns on.

What is the maximum load the controller can switch?

The controller can switch a resistive load up to 2.3 kW (approx. 10 A at 230 V). It is designed for electric floor heating systems.

How do I clean and maintain the controller?

Clean the housing with a dry cloth. Do not use liquids or abrasive cleaners. No regular maintenance is required, but ensure the sensor conduit is intact.

What safety precautions must be observed?

Only qualified electricians should install the device. Disconnect mains power before working on the load circuit. The sensor can carry mains potential in fault conditions. Follow accident prevention regulations.

What are the technical specifications of the control unit?

Operating voltage: AC 230 V~ 50/60 Hz. Temperature range: 10…50 °C. Switching capacity: 2.3 kW. Protection: IP30. Operating temperature: 0…+40 °C. Storage: -25…+70 °C.

USER MANUAL ALFTR231PL JUNG

Operating Instructions Floor heating controller

Two electronic control panel components: one with a dial and knob, the other showing an internal circuit board (no visible text or symbols)

1. Area of application

Used in domestic electrical installations to regulate electrical floor heating systems and temperature control systems.

2. Function

The floor heating controller consists of two parts:

• Control unit for setting the required floor temperature
- Remote sensor in the floor for monitoring the set temperature

Control unit:

Using the setting knob, set the required temperature for your floor. The numbers -6 on the knob correspond to a temperature range of 10 - 50 ^ C.

Note the setting instructions from the manufacturer of your floor heating system.

If the temperature in the floor falls below the temperature you have set, the control unit requests heat; this state is displayed by the red LED above the setting knob. You can therefore see if your heating is using energy.

A range restriction can also be carried out in the setting knob.

The operating state of your floor heating is switched on or off with the mains switch 0 - 1.

You also have the option of programming a temperature reduction via an external time switch e.g. during the night.

If you have installed this type of time switch, the temperature reduction is indicated by the green LED above the setting knob. The temperature reduction is approx. 5 °C.

Example: The temperature set by you on the control unit is 34 ^ (number on dial = 4). This means that the temperature in the floor e.g. during the night can drop down to 29 ^ without your heating switching itself on.

Sensor:

The sensor is to be installed in the floor. It monitors the floor temperature set on the control unit and issues commands to switch the floor heating on and off.

Safety instructions

Electrical equipment may only be installed and fitted by qualified electricians while observing the current accident prevention regulations.

Non-observance of the safety warnings or installation instructions may damage the device, cause fire or other hazards.

In the event of a fault, mains potential can be present at the sensor.

① The switch 0 – I on the control unit causes a singlepole disconnection of the device from the mains and interrupts the circuit to the heating resistor in the floor.
① When working on the load circuit, the mains voltage must be disconnected in principle.
① When the sensor is interrupted, the relay contact is closed. If the sensor experiences a short circuit, the relay contact is open.

3. Connection and installation

Control unit

Mount the control unit in a switch box in accordance with DIN 49 073.

Notice! The device must always be mounted with its supporting frame on top of the wallpaper!

- Carry out the electrical connection according to the wiring diagram (Fig. (1)). Solid conductor cross-section: 1 to 2.5 mm2 No PE conductor required. PE conductor is only used for looping through. Protection class II can be achieved through appropriate installation measures.

Abb.1

Symbols used in the wiring diagram

L : L conductor

N : N conductor

TA : Connection for clock signal for temperature reduction

← : Load connection

NTC : Connection for remote sensor

• Mount the control unit with the screws supplied.
• 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 (A in Fig. (2)).
• Clip on the setting knob (B).

Abb.2

4. Sensor

The sensor must be laid in a conduit. It is thereby protected against damp and can easily be replaced in the event of a repair.

Dimension drawing of remote sensor: Fig. (3).

5. Restricting the temperature setting range

The controller is set ex works to the maximum setting range of *to 6. There are 2 adjustment rings (Fig. (4)) in the setting knob which have a setting range of 5 to 30 °C. When restricting the range, we ask you to carry out the setting according to the diagram (Fig. (5)):

Temperature Management Floor heating controller

Ref.-no.: ..FTR 231 ..

b.4

Abb.5

x = restricting the range in the setting knob

y = setting range of the controller

z = sensor temperature °C

6. Technical data

The controller corresponds to DIN EN 60 730 type 1 and has radio interference suppression in accordance with VDE 0875 or EN 55 014.

6.1. Control unit

Operating voltage AC 230 V\~ 50/60 Hz

Temperature setting range

(dial)

※ ...6 (= 10 ... 50 °C)

Switching current

Switching capacity 2.3 kW

Red LED Control unit requires heat (heating mode)

Green LED Temperature reduction "on"

Contact (relay) 1 make contact (for heating), (non-floating)

Temperature reduction (TA) approx. 5 K

Differential in switching

temperature approx. 1 K

Protection type of housing

acc. to EN 60529 IP 30

Operating temperature 0...+40 °C

Storage temperature -25...+70 ^

6.2. Remote sensor

Sensor element NTC

Sensor cable PVC, 2 x 0.75 mm², 4 m

Protection type acc. to

EN 60529 IP 67

Operating temperature -20...+70^

Storage temperature -20+70^

Subject to change without further notice.

The sensor cable can be extended up to 50 m if required using a 2-core cable with a cross-section of 1.5 mm ^2 , without influencing the accuracy of the controller.

When laying in cable trunking or in the vicinity of power cables, a shielded cable should be used.

6.3. Sensor characteristic values

Measuring device Ri > 1 MΩ

Ratio temperature to resistance: see table in Fig (6).

The resistance values can only be measured with a disconnected sensor.

Temperature °C Resistor kΩ

05	85,279
10	66,785
15	52,330
20	41,272
25	33,000
30	26,281
35	21,137
40	17,085
45	13,846
50	11,277

The resistance values can only be measured with a disconnected sensor.

7. Guarantee

Our products are under guarantee within the scope of the statutory provisions.

Please return the unit postage paid to our central service department giving a brief description of the fault:

ALBRECHT JUNG GMBH & CO. KG

Service-Center

Kupferstr. 17-19

D-44532 Lünen

Service-Line: 0 23 55 . 80 65 51

Telefax: 0 23 55 . 80 61 89

CE The c€ sign is a free-trade mark intended solely for state authorities and does not contain any assurance of properties.