SyxthSense DRPA83M01 User manual

Product Sheet TH6.23
Thermostat Type DRPA83
Online Store: www.syxthsense.com
Enquiries: T: 0870 20 80 100 F: 0870 20 80 200 PS TH6.23 – 1/4
DRPA83 Wireless Receiver
for heating and cooling plants
Model Types Model Description
DRPA83M01 DRPA83MO1 Wireless Receiver for Heating and Cooling Plants
Technical Data Power Supply 230V~ -15% +10% 50Hz
Power Consumption 0.5W
Contact Rating 6A @ 250V~ cos3=1
Frequency 868.35 MHz
Modulation Type ASK
Antenna Type Internal
Max. Distance from
Transmitter 30 m indoor (depending on the environment)
Storage Temperature -10°C .. +50°C
Operating Temperature 0°C .. 40°C
Protection Class IP30
Humidity Limits 20% .. 80% rH (non condensing)
Enclosure Material: ABS V0 self-extinguishing
Colour Signal white (RAL 9003)
Agency Compliance EEC 89/336, 73/23, 93/68, 99/05
Size 85W x 85H x 31D mm
Weight 0.16kg
The DRP A83 is the receiving part of the wireless system for temperature control in
rooms or offices. It features one SPDT relay output which is driven from radio
commands received from a thermostat or a chronostat transmitter.
This system is definitely the best solution in all those buildings where no wires can
be laid between the thermostat and the heating-cooling room. The thermostat
transmitter issues some radio commands directed to the receiver unit DRP A83
M01 according to the need for heating or cooling in the room where the thermostat
is actually located. These ‘radio commands’ are then received and decoded by the
receiver, which is usually installed in the room where the burner or the chiller are
located. In the receiver unit the relay output turns-on or off according to the
regulations needs and can be connected to a valve which will control the flow of
hot/cold water in the relevant room heating/cooling system.
FEATURES
• Self-learning of the thermostat’s address by pressing an internal Button
• One channel with SPDT relay output
• Night reduction capability by connecting an external clock switch
• Compliant with directives EEC 89/336, 73/23 and 93/68, 99/05

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Online Store: www.syxthsense.com Copyright ©2004 SyxthSense Ltd – 07/2004
Enquiries: T: 0870 20 80 100 F: 0870 20 80 200 PS TH6.23 – 2/4
Operating Description The two-colour led in the frontal panel (1) Fig. 1 may turn-on and be either red or green. On start-up,
when the receiver unit DRP A83 M01 is supplied the led (1) flashes in a sequence “green-red-green-
red” to show the correct working of the device. Afterwards the led becomes active according to its
normal functioning and the receiver starts to decode the signals issued by the transmitter as its
normal working.
In the normal functioning the red side of the led (1) displays the status of the output relay:
Red side turned-on means relay output ON
Red side turned-off means relay output OFF
The green side of the led (1) can turn-on at the same time of the red one’s, and in the normal
working it flashes rapidly giving an information about the quality of the signal received.
One flash: a command has been received and the signal is strong, the communication is reliable.
Two flashes: a command has been received, the signal is still sufficient but the communication might
be corrupted by occasional disturbances.
Three flashes: a command has been received from a transmitter in which is set an address different
from the one memorized in the receiver, and so the command has been ignored.
If more than one transmitter were installed in the close area, an indication of this kind has to be
considered normal. If the green side led flashes once and sometimes twice, the received
signal has to be considered good. In the normal working, the DRP A83 M01 receiving unit
continuously monitors the status of the communications with the thermostat to recognize a possible
malfunction of the system. Particularly if no command is received from the transmitter in 90
minutes, (i.e. if the battery of the transmitter is flat) the output will be put in an “alarm status”.
When in “alarm status” the output relay is turned-off and the red side of the led (1) displays this
status blinking. The “alarm status” ends as soon as a command is received correctly.

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Online Store: www.syxthsense.com Copyright ©2004 SyxthSense Ltd – 07/2004
Enquiries: T: 0870 20 80 100 F: 0870 20 80 200 PS TH6.23 – 3/4
Mechanical Construction
and Installation In Fig. 1 is visible the external appearance of the DRP A83 M01.
(1) Two-colour led
red side: output status
green side: quality of communication
(2) Side holes for cover removing.
To install the receiving unit it is necessary to access to the internal parts. When opening the case
always ensure that the unit is disconnected from the 230V~.
To open the plastic case, remove the frontal panel using a small screwdriver to drive the plastic teeth
(2) shown in Fig. 1 and Fig. 2. Apply a light pressure with the screwdriver between the tooth and
the hole in the plastics, but do not push directly on the tooth in order not to break it. The Fig. 2
represents the plastic box’ section and it shows how to handle the screwdriver correctly.
In Fig. 3 is shown the receiver’s internal layout, and the location of the self-learning button (3).
The mechanical installation consists in fixing the DRP A83 M01 on a wall by two screws, using the
holes with distance between axes of 60 mm.
While working with tools in the screw holes, be careful not to damage the internal circuits or any
other component. Once the electrical installation has been completed, close the plastic case by
carefully positioning the frontal panel so that the hole matches the led (1), then slightly press the
panel in order to make the four plastic teeth (2) snapping.
System set-up To be allowed to install more thermostats in the close area and to use multi-channel wireless system,
every thermostat and chronostat has its own address selectable in a 8 way dip-switch. So
thermostats with different addresses can work at the same time without interfering each other and
controlling different zones. In order to memorize the address of the thermostat we want to receive
the commands, a simple set-up procedure has to be made.
Step 1. Set an address in the thermostat, it can be chosen randomly, but attention must be paid if
more than one thermostat is installed in the same building or in the close area, the addresses must
be different.
Step 2. Turn-on the thermostat in the “Test” mode. In this modality it continuously issues a On and
Off command every 3 seconds. See the relevant documentation for further information. Locate
temporarily the thermostat close to the receiver in order to easy the address self-learning procedure.
Step 3. After opening the case of the DRP A83 M01 wire it to the 230V~ power supply. At the start-
up the led (1) will perform the sequence “green-red-green-red”.
Step 4. Execute the self-learning procedure by pressing the button (3) Fig. 3 for one second, until
the led (1) turns-on green. Now the receiver waits for a command, and as soon as it receives ones
from the thermostat transmitter in “Test” mode, it learns his address and memorizes it. When
correctly memorized the led (1) executes another sequence “green-red-green-red”, and then the
receiver returns to its normal working. The address is memorized in a nonvolatile way, so it is
retained and used in the normal working even after a power supply failure. If mistakes occur, it is
possible to execute the self-learning procedure again.
After the self-learning has been done, the receiver’s output will be driven by the thermostat in “Test”
mode, so the relay output will be turned-on and off every 3 seconds. Locate temporarily either the
receiver and the thermostat in the desired final position. Keeping on with the “Test” mode check out
the signal and ensure it is still sufficient: the output relay should turnon and off every 3 seconds.
Check out the green led (1) flashes as explained before.
If the signal is too weak the relay will get stuck always on or always off. We recommend to try out
different location of the receiver, much better performances might be obtain even lightly moving the
device. It is important to install the receiver and the transmitter as far as possible from metal sheets
or reinforced cement walls which could weaken the radio signals.
Electrical Installation This section explain how to wire correctly the DRP A83 M01, please read carefully the following and
see Fig. 4 which shows the internal terminals and how they are internally connected.
Terminals 1 and 2 are the unit supply input, wire it to the 230V~, terminal 2 is the Neutral. Terminal
3, 4, 5 are the SPDT relay output contacts. In Fig. 4 is shown how to connect a load using the
normally open contact. In this way the load will be supplied when the output is active. Terminals 6
and 7 are inputs for an external clock switch. If the wireless thermostats used in the wireless system
provide a 3°C reduction (such as DTP A80 BC), by connecting an external clock switch the system
will be able to regulate the temperatures with a programmed reduction of 3°C. To enable the
programmed reduction, just wire terminals 6 and 7 to the output contacts of an electronic or
electromechanic clock switch.

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Online Store: www.syxthsense.com Copyright ©2004 SyxthSense Ltd – 07/2004
Enquiries: T: 0870 20 80 100 F: 0870 20 80 200 PS TH6.23 – 4/4
Electrical Installation
Cont’d… When the clock contacts are closed, the system will regulate according to the comfort setpoint, when they are open the regulation will be performed according to the 3°C reduced setpoint.
Note that if you do not connect any clock, the inputs 6 and 7 are always open, so this will make the
system perform the reduced setpoint regulation, however in the thermostat can always be manually
selected the comfort setpoint.
In this case there will not be a programmed reduction, but you will be able to manually select the
comfort or reduced setpoint from the thermostat panel selector (in the DTP A80 BC the sun or moon
position, see thermostat documentation for more information).
If you desire the receiving unit never work with any reduction, just wire terminals 6 and 7 together. In
case the receiver is used in conjunction with either a thermostat without 3°C reduction or a
chronostat, it will never regulate with any reduction regardless the state of the clock input.
Maintenance No particular maintenance is required for this product. Periodically check for the good quality of the
received signals. In case the signal from the thermostat is too weak or absent, the red side led (1)
blinks. This could happen if the transmitter battery is flat.
Troubleshooting TROUBLE SHOOTING
SYMPTOM PROBABLE REASON REMEDY
The receiver seems to be
completely ‘dead’. 230V~ power supply is not present.
Check for the correct supply
of the device. Normally the led
(1) remains turned-off, but
at the start-up it flashes in a
sequence “green-red-green-
red” to show the correct
working of the appliance.
The red side of the led (1) Fig.
1 in the frontal panel blinks.
The output is in “alarm status”
because its relevant
transmitter does not work well
or the signal is too weak.
Check the battery of the
relevant transmitter. See its
documentation for more
information.
When the transmitter is
working in “Test mode” the
receiver does not activate the
relay. The green side of the
led (1) quickly flashes three
times.
Signals issued by the
transmitter are correctly
received but the address set
on the dip-switch of the
transmitter does not match
the address memorized in the
receiver.
Execute the “self-learning” as
explained in the “System set-
up” section.
When the transmitter is
working in “Test mode” the
receiver does not activate the
relay. The green side of the
led (1) remains always turned-
off.
Signals received are too weak
for the receiver to correctly
decode the command.
Reposition the transmitters
and/or the receiver. Take care
of avoiding positioning them
close to metal screens or
electrical disturbances
sources. Spend some time to
find the best orientation.
WARNING !
- To determine the right position ensure that the radio signals transmitted are correctly
received by the receiving unit.
- To adjust properly room temperature, install the thermostats far from heat sources,
airstreams or particularly cold walls (thermal bridges).
- The appliance must be wired to the electric mains through a switch capable of
disconnecting all poles compliant to the current safety standards and with a contact
separation of at least 3 mm in all poles.
- Installation and electrical wirings of this appliance must be made by qualified technicians
and in compliance with the current standards.
- Before wiring the appliance be sure to turn the mains power off.
Notes: 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 for 24 months from the time of
delivery, according to the European Directive 1999/44/EC. The
full text of
g
uarantee is available on re
q
uest from the seller.