Eberle FRe L2A/50 Montage- Und Bedienungsanleitung Seite 2

468 931 003 300-3
Mounting and
Operating Instructions
Electronic room temperature controller
with floor temperature limiter
and set-back input
FRe L2A, 517 81 81...
cover 2 parts cover one part
(50x50)
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.
In order to comply with safety class II, the necessary
installation steps must be taken.
This independently mountable electronic device is de-
signed for controlling the temperature in dry and enc-
losed rooms only under normal conditions. The devi-
ce confirms to EN 60730, it works according operating
principle 1C
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 193 720 is required for measuring
the floor temperature.
Features
• Simultaneous room temperature control and floor
temperature 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
2. Description of functions
2.1 Functions
The room temperature is measured by the integrated
sensor and is set via the outer dial.
The scale of *...6 corresponds to 5...30 °C.
The floor temperature is measured by the remote sen-
sor and set via the internal dial (see 2.2).
Lamps
Red: Controller calls for heat
Green: Set-back mode is activated
2.2 Limiting the floor temperature
The maximum floor temperature is set via the internal
potentiometer (left to the lamps). The arrow in the
potentiometer displays the desired temperature
The floor temperature is prevented
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
temperature will be controlled as long as the floor tem-
perature is below the selected max. value. If this value is
exceeded, 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
Anti-freeze: negative half-wave
Heating off: positive half-wave
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 con-
troller will switch to fault mode. The heating will func-
tion 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
Caution! De-energize the electric circuit first
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 tempera-
ture 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...30 ºC)
Floor temperature 20...50 ºC
Indicator lamp red Controller calls for heat
– – – – green Set-back temperature
Ä Power switch 2-pole
Supply voltage 230 V AC (195...253 V)
Å
50/60 Hz
Ç
Output Relay make contact
Switching current 100 mA...16 A cosϕ = 1;
100 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 3 K 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)
Degree of polution 2
Software class A
Calculation impulse voltage 2,5 kV
Temperature for the
Ball compression test 75°C
Voltage and Current for
the for purposes of inter-
fernce measurements 230V, 0.1 A
Ambient temperature 0...40 ºC
Storage temperature –25...70 ºC
Weight 90 g
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