FTRGCR231 - Thermostat JUNG - Free user manual and instructions

Product Type	Floor heating controller
Application	Regulating electrical floor heating systems in domestic installations
Operating Voltage	AC 230 V~ 50/60 Hz
Temperature Setting Range	10…50 °C (dial numbers 1 to 6)
Switching Capacity	2.3 kW (max. 10 A resistive load)
Switching Differential	Approx. 1 K
Temperature Reduction (External Time Switch)	Approx. 5 K
Red LED Indication	Control unit requests heat (heating mode)
Green LED Indication	Temperature reduction activated
Protection Type – Control Unit (Housing)	IP 30 (EN 60529)
Protection Type – Remote Sensor	IP 67 (EN 60529)
Sensor Element	NTC thermistor
Sensor Cable	PVC, 2 x 0.75 mm², 4 m length
Maximum Sensor Cable Extension	Up to 50 m with 1.5 mm² cable (shielded if near power cables)
Operating Temperature – Control Unit	0…+40 °C
Operating Temperature – Remote Sensor	-20…+70 °C
Storage Temperature – Control Unit	-25…+70 °C
Storage Temperature – Remote Sensor	-20…+70 °C
Contact Type	1 make contact (non-floating) for heating
Compliance	DIN EN 60 730 type 1, VDE 0875 / EN 55 014 (radio interference suppression)

Frequently Asked Questions - FTRGCR231 JUNG

How do I set the desired floor temperature?

Rotate the setting knob on the control unit. The numbers 1 to 6 correspond to a temperature range of 10 to 50 °C. Refer to your floor heating manufacturer's instructions for the appropriate setting.

What does the red LED above the setting knob indicate?

The red LED illuminates when the control unit requests heat, meaning the floor temperature has fallen below the set value and the heating is active. It indicates energy consumption.

What does the green LED indicate?

The green LED indicates that a temperature reduction (e.g., night setback) is active, controlled by an external time switch. The reduction is approximately 5 °C below the set temperature.

How can I connect an external time switch for temperature reduction?

Connect the external time switch to the terminal marked 'TA' on the control unit. When the time switch closes, the green LED lights up and the set temperature is reduced by about 5 K.

Can I extend the sensor cable?

Yes, the sensor cable can be extended up to 50 m using a 2-core cable with a cross-section of 1.5 mm². If laying in cable trunking or near power cables, use a shielded cable to avoid interference.

How do I restrict the temperature setting range?

Inside the setting knob there are two adjustment rings. Use them to set the minimum and maximum temperature limits according to the diagram in the manual (Fig. 5). The factory setting allows the full range from 10 to 50 °C.

What should I do if the floor is not heating?

First, ensure the mains switch (0-1) on the control unit is set to '1'. Check if the red LED is on; if not, the set temperature may be too low or the sensor may have an issue. Verify the sensor connection and that the heating circuit breaker is on. If problems persist, consult a qualified electrician.

Is it safe to work on the load circuit?

Always disconnect the mains voltage before working on the load circuit. The switch on the control unit provides single-pole disconnection, but for safety, isolate the circuit at the distribution board. Non-observance can cause electric shock or fire.

What are the sensor characteristic values?

The sensor is an NTC thermistor. The resistance at 25 °C is 33 kΩ. A table of temperature vs. resistance is provided in the manual (Fig. 6). Values can only be measured with the sensor disconnected.

Where should the remote sensor be installed?

The sensor must be installed in the floor, preferably in a conduit to protect against dampness and allow easy replacement. Follow the floor heating manufacturer's recommendations for placement.

USER MANUAL FTRGCR231 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

Temperature Management Floor heating controller

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

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