1254UDE - Dimmer JUNG - Free user manual and instructions

Product Type	Universal Dimmer
Brand	JUNG
Model	1254UDE
Rated Voltage	AC 230 V~, 50/60 Hz
Connected Load	50 - 420 W/VA
Minimum Load	50 W/VA
Load Types	230 V incandescent lamps, HV halogen lamps, LV halogen lamps with TRONIC transformers or conventional transformers, mixed loads (non-capacitive with inductive)
Operation Principle	Two-area touch (upper/lower) for dimming; soft start; short touch on/off, long touch dimming, full-area store brightness
Protection Features	Overtemperature protection; short-circuit protection with automatic restart (phase cut-off: 7 s, phase cut-on: 100 s)
Installation	Fit into DIN 49073 box; use with attachment; connection diagrams for single and multiple places; power boost units possible
Number of Extensions	Unlimited for mechanical push-button; up to 5 for presence detector/automatic switch; total cable length max 100 m
Spurious Radiation	According to EN 55015
Safety	Installation only by qualified electrician; not suitable for disconnecting; load not isolated when off
Maintenance	No specific maintenance required; keep dry and clean
Repairs	Contact JUNG service center (address in manual)
Guarantee	Within statutory provisions; return to service center in Germany

Frequently Asked Questions - 1254UDE JUNG

What types of loads can be connected to the JUNG 1254UDE?

The dimmer supports resistive loads (incandescent lamps, HV halogen lamps), capacitive loads (TRONIC transformers), inductive loads (conventional transformers), and mixed loads. It is not suitable for electronic lamps such as LED or compact fluorescent lamps.

How do I operate the dimmer?

Use the two touch areas: a short touch (less than 400 ms) toggles on/off; a long touch (more than 400 ms) on the upper area dims up, on the lower area dims down. A full-area touch for at least 3 seconds stores the current brightness.

Can I use this dimmer with LED lamps?

No. Connecting electronic lamps like dimmable compact fluorescent or LED lamps can damage the device. Only use incandescent, halogen, or compatible transformers.

What is the minimum load requirement?

The minimum connected load is 50 W/VA. Operation with lower loads may cause malfunction.

How should the dimmer be installed?

Installation must be performed by a qualified electrician. Fit the insert into a DIN 49073 box, attach the frame and attachment, and connect according to the diagrams. Do not apply voltage until the attachment is plugged on.

What happens if the dimmer overheats?

The device has overtemperature protection. It switches off automatically and must be switched back on after cooling. Ensure ambient temperature does not exceed 25 °C to avoid power reduction.

Can I control the dimmer from multiple locations?

Yes, using extension units. For mechanical push-buttons, the number is unlimited; for presence detectors, up to 5 extensions are allowed. The total cable length must not exceed 100 m.

How do I store a brightness level?

Touch the full area for at least 3 seconds. The current brightness is stored, and a soft start indicates completion. The stored value is recalled when the dimmer is turned on again.

What is the warranty period for the JUNG 1254UDE?

The product is covered by statutory warranty provisions. For service, send the unit postage-paid to the JUNG service center in Lünen, Germany, with a description of the defect.

Can I use power boost units with this dimmer?

Yes. Up to 10 EB power boost units can be connected to increase load capacity. Alternatively, a universal power boost unit REG can be used. Follow the boost unit's operating instructions.

USER MANUAL 1254UDE JUNG

Operating Instructions Universal dimmer

1. Warning

Attention:

Electrical equipment must be installed and fitted only by qualified electricians and in observance of the applicable accident prevention regulations.

Not suitable for disconnecting.

When the universal dimmer is off the load is not electrically isolated from the mains.

When using conventional transformers, protect the primary side of each transformer by a fuse as indicated by the manufacturer.

Do not connect any electronic lamps, e.g. switchable or dimmable compact fluorescent lamps or LED lamps. Device can be damaged. Only use safety transformers as per EN 61558-2-6.

Non-observance of the installation instructions may cause fire or other hazards.

2. Function

Universal dimmer for switching and dimming extensive light sources such as:

• 230 V incandescent lamps.
• 230 V halogen lamps.
• LV halogen lamps in conjunction with TRONIC transformers
- LV halogen lamps in conjunction with conventional transformers.

The symbols used to identify dimmer loads designate the type of the electrical behaviour of loads connected to dimmers:

R = ohmic, L = inductive, C = capacitive

Switching and dimming commands are given when the covers of the dimmer, of the extension insert or of the radio transmitter are actuated. The universal dimmer works on the basis of the twoarea principle, i.e. there is one touch area each for the 'brighter' and 'darker' dimming directions. The lights are turned on by a lamp-saving soft start. This Operating Instructions paper describes the functionality in combination with the manual attachment.

Operation from the switched-off state:

Short touch (less than 400 ms)

UPPER or LOWER touch area or full area: ON

Longer touch (more than 400 ms):

UPPER touch area: Dimming from minimum to maximum brightness.

LOWER touch area: Turning on to minimum brightness.

Operation from the switched-on state:

Short touch (less than 400 ms):

UPPER or LOWER touch area or full area: OFF

Longer touch (more than 400 ms):

UPPER touch area: Increasing the light intensity to maximum (dimming up).

LOWER touch area: Decreasing the light intensity to minimum (dimming down).

Full-area operation (3 s min.): The current brightness is stored and adjusted upon restarting (short actuation).

The storing process is indicated by a soft start.

3. Installation Instructions

Fit universal dimmer insert (1) into a box as per DIN 49073 (Fig. A).

The connecting terminals of the insert must be at the bottom. Use the universal dimmer insert only in combination with an attachment. Plug attachment (2) onto the insert (1) together with frame (3). Plug on the attachment prior to applying the mains voltage. Do not change the attachment while the mains voltage is on, or malfunctioning will be caused. After installation of the universal dimmer, the brightness value in memory is the maximum brightness.

Do not connect capacitive loads (e. g. TRONIC transformers) and inductive loads (e. g. conventional transformers) to the universal dimmer at the same time.

For resistive loads (incandescent lamps, halogen HV lamps), the learning process becomes noticeable by short-time flickering. Depending upon the conditions of the mains, the learning process lasts between 1 and 10 s. During this time, no actuation is possible. In case of a short-circuit during the learning process, the load must be learned again after the elimination of the short-circuit. Mains failures of longer than 0.7 s. will lead to switching off the dimmer. The overall power rating of the consumers connected must not exceed the maximum load specified in the technical data. Load the transformers with lamps up to at least 85 % of their rated loads. The overall load including transformer losses must not exceed the maximum power rating. Operation with mixed loads of the specified types is possible up to the total admissible load.

Minimum load 50 W/VA

Depending upon the type of installation, the maximum connected load must be reduced by:

• 10% per 5^ exceeding of the ambient temperature of 25^ .
• 15% for installation in wooden, gypsum plaster or hollow walls.
  • 20% for installation in multiple combinations.

Short-Circuit Protection

Phase cut-off operation (capacitive load, resistive load):

Disconnection with automatic re-starting after elimination of the short-circuit within 7 s. After this, permanent disconnection until the universal dimmer is re-started manually.

Phase cut-on operation (inductive load):

Disconnection with automatic re-starting after elimination of the short-circuit within 100 seconds. After this, permanent disconnection until th universal dimmer is re-started manually.

Overtemperature Protection

Switching off in case of an excessively high ambient temperature. After cooling down, the device must be switched back on.

4. Connection

Connect as shown in Fig. B

Fig. B

For dimming from several places, refer to Fig. C

Fig. C

Power boost units can be connected to the universal dimmer to increase the load rating when the dimmer capacity is exhausted.

Select a boost unit suited to the universal dimmer and to the load.

Further details can be found in the operating instructions of the respective boost unit.

Connect as shown in Fig. D and E

(1) Universal dimmer insert
(2) Load
(3) extension
(4) for further extensions
(5) Power attachment EB (10 units max.)
(6) Universal power boost unit REG

Fig. D

Fig. E

Note the technical connection conditions of the power stations.

Centralized telecontrol signals of the power stations may be noticed as flickering of the lamps. This is not a defect of the dimmer.

Using Extensions

Control from an extension unit is possible only if the attachment on the main unit is in place.

“2-wire” extension insert: The same functionality with an short lift key as on the universal dimmer.

Mechanical button (normally open):

Short push: ON/OFF.

Longer push: Dimming to maximum brightness.

Dwell time of approx. 1 s at maximum, then dimming down to minimum brightness. Dwell time of approx. 1 s at minimum, the dimming up to maximum brightness. This procedure repeats continuously. Storing any brightness value by the mechanical push-button (normally open) is not possible. Illuminated mechanical pushbuttons must have a separate N terminal.

5. Specifications

Rated voltage : AC 230 V \~, 50 / 60 Hz

Connected load : 50 - 420 W / VA

Type of loads: - 230 V incandescent lamps

(resistive load, phase cut-off)

- HV halogen lamps

(resistive load, phase cut-off)

- TRONIC transformers

(capacitive load, phase cut-off) or

- Conventional transformers

(inductive load, phase cut-on)

- Mixed loads of the specified types

(non-capacitive with inductive loads).

For mixed loads with conventional transformers, do not exceed a resistive load (incandescent lamps, halogen HV lamps) portion of 50%.

Power boost units:

EB: 10 units max.

Universal power boost unit REG: see boost unit

operating instructions.

Number of Extensions:

"2-wire" extension insert,

mechanical push-button: unlimited

extension insert for presence

detector and automatic switch: 5

Different types of extension units can be combined

Total length of extension

connecting cable: max. 100 m

Spurious radiation: according EN 55015

6. 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: +(49) 23 55 . 80 65 51

Telefax: +(49) 23 55 . 80 61 65

The €-Sign is a free trade sign addressed exclusively to the authorities and does not include any warranty of any properties.