OVERVIEW
This device is a radio-controlled electronic thermostat to control
the temperature in industrial and commercial spaces as well as
domestic environments.
The thermostat can control heating and cooling systems. The LED
on the front warns when the batteries are low.
Its main characteristic is the lack of electrical connections; indeed
the ON and OFF signals are transmitted to the receiving unit by
radio, making this device easy and cheap to install, especially
when there is no existing electrical system available.
OPERATION
Heating/cooling mode
By adjusting the JP3 connector, shown by in Fig. 5, the
thermostat can be set in Heating or Cooling mode:
- Heating
Jumper inserted to the left (F of Fig. 5)
- Cooling
Jumper inserted to the right (G of Fig. 5)
Periodically the thermostat transmits a radio command to the
receiver containing the information about the room temperature,
setpoint temperature and the heating/cooling status. The receiver
starts to compare the desired temperature with the room
temperature and adjusts accordingly by turning the relay output
on or off.
The receiver can also ignore the heating/cooling setting coming
from the thermostat if the same data comes from an associated
timer thermostat or if the selection is decided on the receiver
using the dedicated input.
The receiver is able to adjust the temperature in the room where
the thermostat is installed with the two setpoint temperatures:
comfort and economy.
The comfort temperature corresponds to the temperature set on
the knob, whereas the economy temperature is the
temperature set on the knob minus a fixed value (set on the
receiver) in the heating mode (in the cooling mode, Tc
fixed reduction).
The reduction function can be overridden by the receiver by
connecting a hourly programmer to the dedicated input or
controlled by an associated timer thermostat. For further
information, see the instructions for the receiver.
Selecting the sampling interval
To make sure that the batteries last for a long time, the
thermostat waits for a length of time between one transmission
and another that can be chosen as 3 or 10 minutes by adjusting
on an internal jumper JP2, shown by in Fig. 5.
- Sampling every 10 minutes
Jumper inserted to the left (C of Fig. 5)
- Sampling every 3 minutes
Jumper inserted to the right (D of Fig. 5)
- Sampling every 3 minutes with reduced power
Jumper not inserted (E of Fig. 5)
The 3-minute option should be chosen if used with quick heating/
cooling systems, whereas the 10-minute option also allows
excellent accuracy and comfort with radiator systems and floor
heating systems. If the thermostat is installed in close proximity to
the receiver (<15 metres), you can also choose the 3-minute
mode with reduced power.
The batteries will last longer when you choose the longer period.
Due to the updating period, the output will not automatically be
updated when the setpoint knob is moved. You will have to wait
for 3 or 10 minutes in the worst case in accordance with the
length of time chosen.
Enabling the remote probe
The thermostat leaves the factory set up for operation using the
internal probe.
As an alternative to the internal probe, a remove probe can be
connected to two terminals shown by in Fig. 5. When
connecting the remote probe, remove the jumper JP1, shown
by in Fig. 5 to disable the internal probe.
Make sure that you are using the right type of remote probe and
observe the maximum length of wires allowed.
Knob
Using the regulation knob
, the setpoint temperature can be set
around which the temperature check will be carried out in the
range of 6 .. 30°C.
Limiting the rotation of the knob
The field within which the knob rotates can be reduced by
adjusting in the following way:
- Lifting the knob by using a screwdriver as a lever in the
appropriate guide .
- Pull out the mechanical clamps set on the side of the knob
housing and position them as shown in the example in
Fig. 4 with and . The field of rotation is reduced in this
way as in the arch shown by .
- Reinsert the knob by positioning it in the right angle so that it
correctly comes into connect with its spindle and then pressing
it down to the bottom.
Red LED: low battery warning
The red warning LED on the front of the product notifies when
the batteries are low and must be replaced. The LED usually
remains always off, whereas when it shows that the battery is low
it comes on for a moment every 20 seconds approximately.
Furthermore, when the batteries are inserted for the first time, the
red LED comes on and stays lit for 2 seconds. This indicates that
the batteries have been inserted correctly and that the thermostat
is working properly.
The LED also performs a function during the test stage. (See
'System configuration' paragraph.)
SYSTEM CONFIGURATION
Before installing the thermostat in the desired position, it is
necessary to check that the receiver correctly receives its signals.
The operation is carried out by enabling the ‘Test’ function,
described below.
Open the thermostat, as shown in the ‘Installation’ paragraph,
and insert the batteries while respecting the correct polarity; in
the internal position of the batteries can be seen. When the
batteries are inserted for the first time, the red LED comes on
and stays lit for 2 seconds. This indicates that the batteries have
been inserted correctly and that the thermostat is working
properly.
The ‘Test’ function of the thermostat is enabled by pressing the
‘Test’ button for a second, shown by in Fig. 1-5. Press the
‘Test’ button again to end the function.
The ‘Test’ button can also be pressed without removing the cap
by adjusting with a small screwdriver through the front slots as
shown by in Fig. 1.
In the ‘Test’ mode, the thermostat continuously transmits ON and
OFF commands to the receiver with a pause of approximately 2
seconds between one and the next. The LED flashes every 2
seconds. If the ‘Test’ mode isn’t finished using the button, it will
end automatically after approximately 12 minutes.
The ‘Test’ mode must be used to self-learn the address code of
the thermostat on the receiver.
When the thermostat is positioned in the desired area, make sure
that it still communicates properly with the receiver.
If the thermostat is positioned too far away from the receiver, the
relay output will always remain on or off. In this case, it is
recommended that a better position is found, possibly closer to
the receiver, and make sure that it isn’t in the vicinity of metal
screens or reinforced concrete walls which could weaken the
radio transmission. The signal quality can be monitored in the
receiver; see the relative documentation for further information.
INSTALLATION
Before installing the thermostat, make sure that the radio signals
transmitted are correctly received by the receiving unit.
We hereby remind you that the thermostat should be installed
away from sources of heat, drafts and particularly cold or hot
walls for the correct regulation of the room temperature.
Perform the following operations to install the thermostat:
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•
Remove the knob by using a small screwdriver as a lever in the
appropriate guide, shown by in Fig. 1-2.
•
Remove the cap by using a screwdriver on the plastic teeth,
shown by in Fig. 1-2-3, by applying a little pressure between
the tooth and the hole in the plastic, without pressing down
directly on it to make sure that it doesn’t break.
•
Correctly insert the batteries respecting the correct polarity. Do
not use dead batteries. Use alkaline batteries and perform the
Test function. (See ‘System configuration’ paragraph.)
•
Having identified the best position for installation, fix the bottom
of the thermostat to the walls using two screws, using the two
holes with a distance between the 60mm axes.
Take care not to damage the internal electronic circuits when
working with tools close to the holes of the screws.
•
Configure the thermostat; see the ‘OPERATION' or ‘SYSTEM
CONFIGURATION’ paragraph.
•
Close the thermostat by positioning the cap so that the knob’s
spindle comes into contact with the relative hole and then press
it slightly until the four plastic teeth click.
•
Reinsert the knob by positioning it in the right angle so that it
correctly comes into connect with its spindle and then pressing
it down to the bottom.
TECHNICAL FEATURES
Power supply:
2 x 1.5V= alkaline AAA type batteries
Duration of the batteries:
>6 years at TX every 10 min
>2.5 years at TX every 3 min
>4 years at TX every 3 min with
reduced power
Measurement range:
-5.0 ..+46.1 °C
Regulation range:
6 .. 30°C
Precision:
± 1°C
Resolution:
0.1°C
Hysteresis:
defined on the receiver
Type of sensor:
NTC 100k
Ω
@ 25°C internal
Remote sensor:
cod. STL OTS A 150 (optional)
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TROUBLESHOOTING
SYMPTOM
PROBABLE REASON
REMEDY
In the ‘heating’ mode, even though the
setpoint knob is on maximum, the red
LED still remains OFF and the relative
output in the receiver also remains OFF.
The red LED indicator does not
continuously indicate the status of the
output relay. Furthermore, the output relay
in the receiver does not come on or off
instantly. The status is updated every 3 or
10 minutes. (See the ‘How it works’
section.)
This is a normal operation.
When the batteries are inserted for the first
time, the red LED does not come on for
2 seconds.
The batteries are dead or have been
inserted wrongly. The polarity must be
respected.
Correctly insert new batteries.
The ‘Installation’ paragraph explains how to
perform the operation correctly.
Due to an extremely low consumption of
electricity in the circuit, if the batteries had
already been inserted recently, it is possible
that a small amount of energy is still present
even if there is no power supply, therefore
the thermostat momentarily behaves as if
the batteries had not been removed at all.
Press the internal test button for a
second to reset the internal electronic
circuits.
When the batteries are inserted, also by
pressing the ‘Test’ button , the LED does
not come on for 2 seconds, briefly flashes
and the thermostat doesn’t work.
The batteries are dead.
Correctly insert new batteries.
The ‘Installation’ paragraph explains how to
perform the operation correctly.
In the ‘Test’ mode, the LED in the
thermostat flashes correctly, but the relay of
the relative output in the receiver still
remains off.
The address code of the thermostat hasn’t
been correctly self-learnt by the receiving
unit or the self-learning procedure hasn’t
been carried out on any of the unit’s
channels.
Carefully
following
the
‘self-learning’
procedure described on the instructions
sheet of the receiving unit to join the
transmitter to the desired channel.
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In the view of a constant development of their products, the manufacturer reserves the right for changing technical data and features without prior notice. The
consumer is guaranteed against any lack of conformity according to the European Directive 1999/44/EC as well as to the manufacturer’s document about the warranty
policy. The full text of warranty is available on request from the seller.
Maximum length of the
wires to the remote sensor: 3 m
Frequency:
868.150 MHz
Output power (ERP):
< 25 mW
Modulation:
GFSK
Type of antenna:
Internal
Max. distance from receiver: >300 m in free field
>50 m in buildings (depending on the
building and environment)
Protection rating:
IP 30
Operating temp.:
0 .. 40 °C
Storage temp.:
-10 .. +50 °C
Humidity limits:
20 .. 80 % RH (non-condensing)
Enclosure: Material:
ABS V0 self-extinguishing
Colour:
Signal White (RAL 9003)
Maximum dimensions:
85 x 85 x 29 mm (WxHxD)
Weight:
~ 130 g
EMC normative references: ETSI EN 301 489-3 v1.4.1
LVD normative references: EN 60730-1 (1996)
R&TTE normative references: ETSI EN 300 220-2 v2.1.1
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WARNING
- To determine the correct position one must ensure that the
radio signals transmitted are correctly received by the
receiving unit.
- To adjust properly room temperature, install the thermostat
far from heat sources, airstreams or particularly cold walls
(thermal bridges). When the remote sensor is used in
conjunction with the thermostat, then this note is to be
applied to the remote sensor itself.
- For remote version all wirings must be made using wires
with 1,5 mm² minimum section and no longer than 3 m. Do
not use same duct for signal wires and mains.
- Installation and electrical wirings of this appliance must be
made by qualified technicians and in compliance with the
current standards.
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