Manual Eberle FRe L2A Thermostat

Manual

1. Applications

The electronic room temperature controller with floor

temperature limiter is used for single-room control:

• for room heating with limitation to a maximum floor

temperature

• for hot water floor heating systems in combination with

thermo-electric actuator drives actrors normally closed.

The remote sensor F 193720 is required for measuring the

floor temperature.

Features

• Simultaneous room temperature control and floor tem-

perature limitation

• Limitation of floor temperature to a pre-selected max-

imum value

• Nighttime set-back, input for external clock

• Indicator lamps for "controller calls for heat" and for set-

back operation

• 2-poel mains switch

• Mounting in 60mm flush-type box

• Adjustable heating interrupt according standard EN

50559 (not for valves normally open)

2. Description of functions

2.1 Functions

The room temperature is measured by the integrated sen-

sor and is set via the outer dial.

The scale of *…6 corresponds to 5…30 °C.

The floor temperature is measured by the remote sensor

and set via the internal dial (see 2.2).

Interrupts heating after continous heating of 1hr for 5

Minutes (according EN 50559)

Lamps

Red: Controller calls for heat

Green: Set-back mode is activated

Caution-1!

The device may only be opened and installed ac-

cording to the circuit diagram on the device or these

instructions by a qualified electrician. The existing

safety regulations must be observed.

Appropriate installation measures must be taken to

achieve the requirements of protection class II.

This independently mountable electronic device is de-

signed for controlling the temperature in dry and enclo-

sed rooms only under normal conditions. The device

confirms to EN 60730, it works according operating prin-

ciple 1C

468 931 003 300-9



Mounting and

Operating Instructions

Electronic room temperature controller

with floor temperature limiter

and set-back input

FRe L2A, 517 81 81…

2.2 Limiting the floor temperature

The maximum floor temperature is set via the internal

potentiometer (left to the lamps). The arrow in the poten-

tiometer displays the desired temperature

The floor temperature is preven ted

from exceeding the set value.

The lamps will display the set floor

temperature when the controller is

switched on.

The green lamp indicates the units of

ten, the red one the units from 1-9.

e.g. 35° = green lamp flashes 3 times, then the red lamp

flashes 5 times.

2.3 Call for heat

The amount of heat called for is determined by the two

control values (of the room and the floor). The room tem-

perature will be controlled as long as the floor temperatu-

re is below the selected max. value. If this value is excee-

ded, the heating will be switched off until the floor has

cooled down.

2.4 Functions of the set-back input TA

The TA input is used to set various set-back functions, refer

to table below.

The functions are selected via the mains sine half-waves.

The functions correspond to the "Pilot wire" specifica-tion.

Half-wave Function

none no set-back

both set-back acc. to J2

positive control off

negative anti-freeze = 5°C

both pulsed short set-back by 1°C

both pulsed long set-back by 2°C

The anti-freeze function regulates to a temperature of 5°C.

This multi-function input makes it possible to acti-vate

controller functions by means of the various half-waves of

the mains AC voltage:

Normal operation: input open – – – –

Temp. set-back: both half-waves

Ä

Anti-freeze: negative half-wave Å

Heating off: positive half-wave Ç

2.5 Selecting the set-back temperature

By means of the J2 jumper it is possible to select 3° or 5°..

J2 closed* set-back by 5°C

J2 open set-back by 3°C

* = factory pre-set

The temperature set externally via the dial is reduced by

this value.

2.6 Fault of the floor sensor

If a sensor fault (short-circuit or break) occurs, the control-

ler will switch to fault mode. The heating will function with

max. 30% of the energy (operation for 30% of the time).

This provides frost- and overheat protection.

In the event of a sensor fault, both lamps will flash.

2.7 Function of the lamps

Function Lamp green Lamp red

Heating is on on

Set-back mode on

Floor sensor fault flashes flashes

max. floor temp. flashes flashes

(for higher (for lower

digit) digit)

3. Mounting / Commissioning

The controller should be mounted at a point in the room

which:

• can be easily accessed

• is free of curtains, cabinets, shelves, etc.

• allows free air circulation

• is not exposed to direct sunlight

• is not draughty (when doors or windows are opened)

• is not directly influenced by the source of heat/cold

• is not located on an outer wall

• is approx. 1.5 m above the floor.

Electrical connection

Perform the steps described below:

• Pull off the temperature dial

• Release the fixing screw

• Remove the upper part of the casing

• Connect acc. to circuit diagram (see bottom of casing)

After power on, the adjusted maximum floor temperature

will be displayed see 2.2.

Floor sensor F 193 720

The remote sensor must be mounted in such a way that

the temperature to be limited can be correctly de-

tected.

The remote sensor should be installed in a protective tube.

This will facilitate future replacement.

Do not install the sensor close to power lines. In other

cases a shilded cable has to be used.

The sensor can be extended to max. 50 m by means of a

cable suitable for mains voltage.

Caution !

The sensor lines are on mains voltage (230 V).

4. Technical data

Order designation FRe L2A, FRe L2A/50

EDP No. 517 8181…

Temperature setting range

Room temperature *…6 (5…30ºC)

Floor temperature 20…50ºC

Indicator lamp red Controller calls for heat

green Set-back temperature

Power switch 2-pole

Supply voltage 230 V AC (207…253 V)

50/60 Hz

Output Relay make contact

Switching current 10mA…16 A cosϕ = 1;

10 mA… 4 A cosϕ = 0.6

Control algorithm Proportional controller

(similar to continuous

through PWM)

Switching temperature

differential ~1°C

Temperature sensor

for room temperature internal

for floor temperature Type F 193 720 (length 4 m,

can be extended to 50 m)

Temperature set-back

for room temperature 3K or 5 K selectable s. 2.5

via external timer

Range limitation in the dial

Degree of protection

of casing IP30

Safety class II (see Caution-1)

Pollution degree 2

Software class A

Calculation impulse voltage 4 kV

Ball pressure test

temperature 75 ± 2 °C

Voltage and Current for

the for purposes of inter-

fernce measurements 230V, 0.1 A

Ambient temperature 0…40ºC

Storage temperature –25…70 ºC

Weight 90 g

Energy class IV = 2 %

(acc. EU 811/2013, 812/2013, 813/2013, 814/2013)

Caution! De-energize the electric circuit first

Sensor characteristics

10°C 66.8 kΩ 30°C 26.3 kΩ

20°C 41.3 kΩ 40°C 17.0 kΩ

25°C 33 kΩ 50°C 11.3 kΩ

5. Circuit diagram

Position of the jumpers

6. Dimensions

cover one partcover two parts,

50 x 50 mm

This product should not be disposed of with

household waste.

Please recycle the products where facilities for

electronic waste exist. Check with your local

authorities for recycling advice.

Rating

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