Robur OTRG005 User manual

Instruction sheet OTRG005 thermoregulator
OTRG005 1
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
OTRG005TheRmOReGulaTOR
1 PRemISe
1.1 QRCODE
1.2 AVAILABLE LANGUAGES
For versions of this Instruction sheet in other languages,
see Robur website.
1.3 USE
Gas unit heaters.
1.4 KEY TO SYMBOLS
DANGER
WARNING
NOTE
PROCEDURE
REFERENCE (to other document)
2 WaRNINGS
For correct installation, please refer to the manual
included in the appliance and to these installation
and operation instructions.
Please read the warnings and instructions for use
contained in these instructions carefully as they
provide important information regarding safe in-
stallation and use. Keep this sheet carefully for fur-
ther reference. The manufacturer cannot be held
responsible for any damage caused by improper,
erroneous or unreasonable use.
Installer's qualications
Installation must exclusively be performed by a
qualied rm and by skilled personnel, with spe-
cic knowledge on heating and electrical systems,
in compliance with the laws in force in the Country
of installation.
The design, installation, operation and maintenance of
the systems shall be carried out in compliance with cur-
rent applicable regulations, depending on the Country
and location, and in accordance with the manufacturer's
instructions. In particular, regulations regarding the fol-
lowing shall be complied with:
▶ Electrical systems and equipment.
▶ Fire safety and prevention.
▶ Any other applicable law, standard and regulation.
Any contractual or extra-contractual liability of the
manufacturer for any damage caused by incorrect
installation and/or improper use and/or failure to
comply with regulations and with the manufactur-
er's directions/instructions shall be disclaimed.
This operation must be curried in total safety.
Before starting intercept the gas and disconnect
the power supply.
3 DeSCRIPTION
The OTRG005 thermoregulator is a device that can direct-
ly manage Robur gas unit heaters: the simple and intuitive
display interface allows the user to change the control pa-
rameters, switch the unit on/o and change the operat-
ing mode; a serial interface also allows to create cascading
systems managed by a single chronothermostat (optional
OCDS008), with considerable advantages in terms of tem-
perature control, especially when installing gas unit heat-
ers in large spaces.
When using the OTRG005 thermoregulator in com-
binationwithNext-G seriesgasunit heaters,thegas
unitheaterwillbemanagedbythethermoregulator
on two power levels using the temperature probe
connected to the thermoregulator, instead of
using continuous heat output modulation.

OTRG005
OTRG005 thermoregulator
2Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
4 FeaTuReS
Figure4.1Thermoregulator
OP Red led showing gas
unit heater operating
mode
COM Green led showing
serial communication
status
On/o
RES/FUN Reset/Special
functions
- Decrease
+ Increase
NTC Room temperature
probe
OP
COM
RES/
FUN
_
+
NTC
The main features of this device are:
▶ 2-digit 7-segment display
▶ 2 led for diagnostic functions and operation signalisa-
tion
▶ 4 buttons for setup functions
▶ 1 NTC probe for ambient temperature measurement
▶ 3 high voltage outputs:
heat demand
summer ventilation
unlock the ignition/ame control device
▶ 2 high voltage inputs (feedback from the gas heater):
operating status
ignition/ame control device lockout
▶ OpenTherm 2-channel interface for execution of cas-
caded systems
▶ Modbus-RS485 interface for execution of cascading
systems
5 TeChNICal DaTa
Table5.1Technical data
OTRG005 thermoregulator
Power supply voltage V 220 - 240
frequency Hz 50 - 60
Operating temperature minimum °C -20
maximum °C +60
Storage temperature minimum °C -40
maximum °C +85
Humidity maximum at 40 °C % 95
Protection rating IP - 30
Electric power consumption in standby mode W 3
Internal fuse A 6,3
External fuse (recommended) A <6,3 (1)
Weight g 250
Adjustment range (heating mode) °C 10 ÷ 30
Adjustment range (economy mode) °C 3 ÷ 25
Adjustment range (safety mode) °C 3 ÷ 25
Temperature display range °C 0 ÷ 40
Outputs
heat demand (REQ) maximum 5A cos φ ≥ 0,4
summer ventilation (FAN) maximum 5A cos φ ≥ 0,4
reset (RES) maximum 1A cos φ ≥ 0,4
Inputs operation feedback (OF) mA 2 - 230 V/50 Hz
locking feedback (LF) mA 2 - 230 V/50 Hz
NTC probe 10 kΩ @ 25 °C β=3435
Dimensions
width mm 150
height mm 110
depth mm 40

Instruction sheet OTRG005 thermoregulator
OTRG005 3
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
OTRG005 thermoregulator
Maximum length of connecting cables
between OTRG005 and gas unit heater m 10
between OTRG005 and OCDS008 chrono-
thermostat m 50
between OTRG005 and others OTRG005 m 50
between the most distant OTRG005 device
connected with Modbus and the control
PC m 1100
1 The external protection fuse rating must be selected considering the maximum load in the most unfavourable operating mode and conditions.
Figure5.1Thermoregulator dimensions
A Front panel
B Front panel fastening screws
C Pre-punched rectangular plates
D Pre-punched square plate
E Mounting holes
F Openings for seating the pre-punched
plates C and D
58.31±10 110±1
150±1
40.5±1
16.6±1
41.3±1
125±0.5
85±0.5
83.5±0.5
Ø4.5 Ø4.5
Ø4.5 Ø4.5
Ø3.8
Ø3.8
5
5
Ø9
Ø9
Ø18.8
A
B
C
C
D
E
E
EE
B
F
F
6 INSTallaTION
The OTRG005 thermoregulator is equipped with an am-
bient probe capable of detecting the temperature of the
zone where it is placed. For this reason, it is necessary to
place the thermoregulator in the area you want to control,
on a wall or other surface that does not aect in negative
or positive the detected temperature. It is therefore advis-
able to avoid installation on non-insulated walls, in areas
inuenced by hot or cold air currents and near doors.
How to install the thermoregulator (Figure
5.1 p.3 )
1. Locate the position where you want to install the
thermoregulator.
2. Remove the thermoregulator front panel (A) by
unscrewing the 2 xing screws (B).
3. Remove the pre-punched plates from the bottom of
the thermoregulator box (details C and D).
4. Use the plates to close the three F openings on the
sides of the box by inserting them in the appropriate
seats.
5. Use the bottom of the box to mark the position of the
xing holes (E) of the thermoregulator on the wall.
6. Drill the holes and x the box to the wall using expan-
sion screws (not supplied).
7. Perform connections as detailed in Paragraph
11 p.12 .
8. After installation, close the thermoregulator fastening
the front panel (A) to the box using the appropriate
screws (B).

OTRG005
OTRG005 thermoregulator
4Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
7 CONNeCTION DIaGRam
Figure7.1Connection diagram
C Electrical bridge (Jumper)
D Chronothermostat OCDS008
E Previous OTRG005 thermoregulator
F External switch
G Next OTRG005 thermoregulator
S NTC temperature probe (already connected)
J1
J6
J5
J4
J3
2
1
2
1
2
1
2
1
JP
S
MODBUS
A
B
C
J2
11 22 3 4 5
DG
E
F
Figure7.2Example of connection of several thermoregulators to OCDS008 chronothermostat
A OTRG005 thermoregulator
B OCDS008 digital chronothermostat
1
2
J1
1
J2
12
J3
J4
J5
J6
121212
2
3
4
5
1
2
J1
1
J2
12
J3
J4
J5
J6
121212
2
3
4
5
JP
A
B
JP
A

Instruction sheet OTRG005 thermoregulator
OTRG005 5
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
Figure7.3Example of connection of several thermoregulators to an external request
A OTRG005 thermoregulator
B External request
C Relay
1
2
J1
1
J2
12
J3
J4
J5
J6
121212
2
3
4
5
1
2
J1
1
J2
12
J3
J4
J5
J6
121212
2
3
4
5
L
N
JP
A
B
JP
A
C
8 OPeRaTION
The exibility of the OTRG005 thermoregulator allows it
to be combined with Robur gas unit heaters.
The device can operate in the following modes:
▶ Local (single).
▶ Remote independent (single or multiple), with
OCDS008 or OSWR000 optional.
▶ Remote assisted (single or multiple), with OCDS008 or
OSWR000 optional.
Each mode allows the following operating states:
▶ On/o.
▶ Summer ventilation (activation of the gas unit heater
fan).
▶ Heating (on/o or modulating).
▶ Economy mode heating.
In all local operating modes (Paragraph 8.5 p. 6 ), it is
possible to force the o state (by pressing the button)
and unlock the gas unit heater ignition/ame control de-
vice (by pressing the RES/FUN button) (Figure 4.1 p.2 ).
8.1 HEATING MODE OPERATING LOGIC
This type of device has a logic for managing heating mode
operations based on three main parameters:
▶ Setpoint (Tsetpoint): it's the target temperature inside
the heated room. When the room temperature probe
detects that the set value has been achieved, the gas
unit heater burner is switched o.
▶ Hysteresis (Hy): this parameter is used to prevent the
gas unit heater from switching on and o continuous-
ly in an attempt to achieve and maintain the required
setpoint. This value indicates how much the temper-
ature read by the room temperature probe must go
down with respect to the setpoint before the burner
is restarted.
▶ Temperature dierential (Di): it's a temperature range
useful for operating the unit in modulation, between
the maximum and minimum power.
Figure8.1Heating mode diagram (example values)
Di Dierential
Hy Temperature hysteresis
Tsetpoint Setpoint
15 16 17 18
1
max
min
off
Di = 2 °C
Hy = 1 °C
Tsetpoint = 18 °C
2
3
4
Figure 8.1 p. 5 shows the inuence of hysteresis and
dierential parameters on the operating mode of a mod-
ulating gas unit heater.
If the hysteresis value is higher than the dierential value,
the gas unit heater and the fan will only start when the
ambient temperature is below the value set by the hyster-
esis (Tsetpoint-Hy).
Assume the setpoint temperature is set to 18 °C, the dier-
ential to 2 °C and the hysteresis to 1 °C.
1. Starting from a temperature lower than 15 °C the gas
unit heater is started at full power until a temperature
of 16 °C is reached (setpoint - dierential).
2. Once the temperature reaches 16 °C, we enter the
dierential range of 2 °C, so that the gas unit heater
switch from full power to minimum power, continuing
to heat until it reaches the setpoint of 18 °C. The burn-
er is then automatically switched o.
3. The room temperature starts to decrease until it falls
below the hysteresis parameter value (i.e. below 18 °C
– 1 °C = 17 °C) so that the burner is switched on again
at minimum power and starts supplying heat again.
From here you can have two dierent conditions:
a. The temperature begins to increase (the heat
supplied by the gas unit heater in modulation is

OTRG005
OTRG005 thermoregulator
6Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
sucient to cover the demand) unit it reacher
again point 2 (18 °C) again, repeating the hystere-
sis cycle.
b. The heat supplied by the gas unit heater in mo-
dulation is not sucient to cover the demand, so
the room temperature continues to decrease until
point 4 (16 °C), reaching the dierential value (2
°C), then the gas unit heater switches to the maxi-
mum power to try to restore the required setpoint.
8.2 MODULATION MANAGEMENT
The gas unit heater operation can be set using the Mo pa-
rameter (Paragraph 10 p.11 ):
▶ with modulation (Mo set to 1)
▶ always at minimum power (Mo set to 0)
▶ always at maximum power (Mo set to 2)
When the Mo parameter is set to 1, the burner operates in
modulation: if the room temperature is lower than that of
the setpoint minus the Di dierential, the burner operates
at the maximum power. Once the dierential threshold is
achieved, the burner enters in modulation until the set-
point temperature is achieved, and then it will switch o.
Modulation is disabled if the anti-condensation mode is
active (Paragraph 8.3 p.6 ).
Anyway, when the setpoint temperature is achieved, the
gas unit heater will switch o.
8.3 ANTICONDENSATION MODE
MANAGEMENT
If the gas unit heater is set to modulation (parameter Mo
set to 1), it is possible to ensure that the gas unit heater al-
ways remains at maximum power below a given ambient
temperature, in order to avoid potential condensation.
To activate this operating mode, set the AC parameter
(Paragraph 10 p.11 ) to a value other than of.
The value of the AC parameter corresponds to the am-
bient temperature below which the gas unit heater will
always be at maximum power. Above this, the gas unit
heater operation will be modulating.
8.4 KEYBOARD LOCK
This function, if enabled via the LF parameter (Paragraph
10 p. 11 ), allows you to inhibit the use of the keys, to
prevent unwanted changes to the settings.
The keypad lock is highlighted by the ashing decimal
point (Figure 8.2 p.6 ).
Figure8.2Display with locked keyboard
The keypad lock remains active even if the device is
restarted.
Keypad unlock
Press the and + keys simultaneously for 15 sec-
onds.
The key symbol is shown for 2 seconds on
the display.
The keypad is now operational again.
If no key is pressed for 1 minute, the keypad lock
is restored.
The keypad lock function is not activated when you
are in the parameter menu.
8.5 LOCAL MODE
In this mode the device is able to:
▶ Switch the gas unit heater on and o.
▶ Perform the reset of any gas unit heater lockout (when
possible).
▶ Adjust the room temperature.
▶ Modulate the burner of the connected gas unit heater
(using the Mo parameter, Paragraph 10 p.11 ).
The local mode is suitable to standalone operation (nei-
ther OpenTherm nor Modbus connection).
Using the - (decrease) and + (increase) buttons (Figure
4.1 p. 2 ) it is possibile to adjust the setpoint tempera-
ture (Ht) for space heating (range 10÷30 °C) or to activate
summer ventilation (CL setpoint, < 10 °C).
In summer ventilation mode (CL setpoint), the fan of the
gas unit heater is always on.
During heating mode theroomtemperature, measured by
the NTC temperature probe, is always compared with the
required setpoint, managing the start or stop of the burn-
er according to the diagram shown in Figure 8.3 p.6 .
Figure8.3Burner status depending on ambient temperature
Hy Temperature hysteresis
Tamb Ambient temperature
Tsetpoint Setpoint
on
off
Hy
Tsetpoint - Hy
Tsetpoint
Tamb
HY represents the temperature hysteresis, i.e. a threshold
which avoids the continuous switching on/o of the gas
unit heater in the presence of a room temperature close
to the setpoint (this value can be set via the user interface,
Paragraph 10 p.11 ).
For further details on the hysteresis temperature opera-
tion refer to Paragraph 8.1 p.5 .
The value of the Di dierential can be modied through
the parameters menu, Paragraph 10 p.11 .
For further details on the dierential operation refer to
Paragraph 8.1 p.5 .

Instruction sheet OTRG005 thermoregulator
OTRG005 7
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
8.5.1 J6 external request operation
J6 input can be used as:
1. External on/o request (in heating mode), with Lo pa-
rameter disabled (Paragraph 10 p.11 ).
2. Switch for heating mode with economy setpoint (Lo)
or with normal setpoint (Ht), with Lo parameter ena-
bled (Paragraph 10 p.11 ).
The Ht setpoint is the normal Tsetpoint value that
is set for heating, while the economy setpoint (Lo)
is set by the appropriate parameter Lo (Paragraph
10 p.11 ).
8.5.1.1 J6 operation with Lo parameter disabled
This function is useful when you want to start the heat-
ing or ventilation through an external request to the
OTRG005 thermoregulator (e.g. programmable timer, ex-
ternal switch, etc.).
Check display status (Figure 8.4 p.7 ):
1. If no temperature (- -) is shown on the display, the de-
vice is switched o. To turn it on press .
2. If the display shows a number, e.g. 12, it means that
the device is active; the number indicates the temper-
ature read by the NTC probe.
3. In this case, the device correlates the temperature read
by the probe with the required setpoint.
4. Ifthe setpointtemperatureis below10 °C (Tsetpoint
= CL) then contact J6 can be used for:
Activate summer ventilation, closing J6 contact.
Switch o the gas unit heater, opening J6 contact.
5. If the setpoint temperature is between 10÷30 °C
(Tsetpoint = 10÷30 °C) then contact J6 can be used for:
Activate heating mode, closing J6 contact.
Switch o the gas unit heater, opening J6 contact.
Figure8.4J6 contact used as on/o switch (Lo parameter
disabled)
START
YES
(OFF state)
NO
(ON state)
OFF state
OFF state
OFF state
YES YES
YES
NO
NO
J6 = CLOSED
J6 = CLOSED
Tsetpoint = CL
NO
(Tsetpoint = 10÷30 °C)
END
SUMMER MODE
(CL)
HEATING MODE
(Ht)
= “- -”
8.5.1.2 J6 operation with Lo parameter enabled
This function is useful when you want to manage the
gas unit heater with two dierent setpoints through an
external request to the OTRG005 thermoregulator.
Check the required setpoint (Figure 8.5 p.7 ):
1. If the setpoint temperature is below 10 °C (Tsetpoint =
CL) and the device is on (display message other than -
-), contact J6 can be used for:
Activate summer ventilation, closing J6 contact.
Switch o the gas unit heater, opening J6 contact.
2. If the temperature setpoint is between 10÷30 °C
(Tsetpoint = 10÷30 °C), the unit is heating in one of the
following modes:
Economy mode heating with Lo setpoint, if the
ECO_HEAT ag is enabled.
Heating with Ht setpoint if the ECO_HEAT ag is
disabled.
Figure8.5J6 contact used as summer/winter mode switch (Lo
parameter enabled)
START
YES
(OFF state)
NO
(ON state)
OFF state
YES
YES
NO
NO
J6 = CLOSED
Tsetpoint = CL
NO
(Tsetpoint = 10÷30 °C)
END
SUMMER MODE
(CL)
HEATING MODE
(Ht)
= “- -”
ECONOMY MODE
(Lo)
YES
ECO_HEAT = ON
OFF state
The activation of the gas unit heater modulation is
entrusted only to the setting of the Mo parameter
(Paragraph 8.2 p. 6 ). The purpose of the param-
eter Lo is to be able to use, for the heating func-
tion, two dierent setpoints, respectively Lo for the
economy mode (useful for example for nighttime
operation) and Ht for the normal mode (useful for
example for daytime operation).
8.5.1.3 ECO_HEAT setting
ECO_HEAT is a ag that indicates if the system has
to work in economy mode or in heating mode.
The ECO_HEAT ag can be changed manually by
the button (Figure 8.6 p. 8 ) or by an exter-
nal request (e.g. timer) connected to J6 terminal
(Figure 8.7 p.8 ).
Manual operation
When the setpoint temperature is lower than 10 °C, sum-
mer ventilation is activated by pressing the button.
When the setpoint temperature is between 10÷30 °C,
ECO_HEAT ag is activated by pressing the button.

OTRG005
OTRG005 thermoregulator
8Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
Figure8.6Manual setting of the ECO_HEAT ag
A Tsetpoint = CL (< 10 °C) B Tsetpoint = 10÷30 °C
OFF (- -) PUSHING SUMMER MODE
(CL)
A
ECO_HEAT
= OFF
B
ECO_HEAT
= ON
PUSHING
PUSHING
PUSHING
Automatic operation
Closing J6 contact, if open, deactivates ECO_HEAT ag
(economy), while opening the contact activates the ag.
During operation in economy mode, the temperature
control work in the same way as described above, but us-
ing the Lo parameter value as the setpoint temperature,
which is dierent than the standard setpoint.
Figure8.7Automatic setting of the ECO_HEAT ag
START
YES
NO
ECO_HEAT = OFF
YES
END
READING OF
J6 CONTACT
J6
OPEN
CLOSED
OPEN
CLOSED
J6
ECO_HEAT = ON
NO
8.6 REMOTE MODE
The OTRG005 thermoregulator can be used individual-
ly or connected to the following central control systems
(optional) (Figure 8.8 p.9 ):
▶ OCDS008 digital chronothermostat that uses an
OpenTherm communication. With this system, it is
possible to control up to 10 OTRG005 devices con-
nected to as many gas unit heaters. For additional
information regarding operation with the OCDS008
digital chronothermostat, please refer to the relative
instructions.
▶ OSWR000 Genius software, for installation on a PC,
using Modbus communication. With this system, it is
possible to control up to 100 OTRG005 devices con-
nected to as many gas unit heaters. For additional
information on operation with OSWR000 Genius soft-
ware, refer to the relative instructions.

Instruction sheet OTRG005 thermoregulator
OTRG005 9
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
Figure8.8Connection diagrams for remote mode (assisted or independent)
1 Single unit connection with OpenTherm
2 Cascading systems connection with OpenTherm (up to 10 units)
3 Single unit connection with Modbus
4 Multiple connection connection with Modbus (up to 100 units)
A OTRG005 thermoregulator
B OCDS008 chronothermostat
C Gas heater
D Modbus master (PC with OSWR000 Genius software)
SI2 SI1
SI1 SI2 SI1
SI1
C
SI3
SI3 3IS3IS
A B
B A A A
C1 C2 C0
C
A
D
C1
C2
C0
A A A
D
1 2
3 4
8.6.1 Remote independent mode
For operation in this mode, the OCDS008 digital
chronothermostat or the OSWR000 Genius soft-
ware is required.
In this mode, the OCDS008 digital chronothermostat
manages the gas unit heater operation (o - summer ven-
tilation - heating - economy) while the room temperature
control is managed directly by the OTRG005 device, by
comparing the temperature measured by the NTC probe
with the setpoint set on the OCDS008 chronothermostat.
This mode is useful when the chronothermostat is far
from the comfort zone, or when more than one OTRG005
thermoregulator (and therefore more than one gas unit
heater) are connected to the chronothermostat.
In case of summer ventilation operation, the fan opera-
tion is totally controlled by the OCDS008 digital chrono-
thermostat, in accordance with the daily programming or
with the manual setting.
During heating operation, the OTRG005 thermoregulator
compares the room temperature measured by the NTC
probe with the setpoint set on the chronothermostat.
For modulation management, see Paragraph 8.2 p.6 .
8.6.2 Remote assisted mode
For operation in this mode, the OCDS008 digital
chronothermostat or the OSWR000 Genius soft-
ware is required.
Remote assisted mode can be used when the OCDS008
control device is installed within the comfort zone.
To activate this operating mode the Md parameter
must be set to 1 (Paragraph 10 p.11 ).
In this mode the management of the system is entrusted
entirely to the OCDS008 control device, thanks to which
it is possible:
▶ Set the gas unit heaters operating mode (o - summer
ventilation - heating - economy).
▶ Set temperatures and time programming of the gas
unit heaters.
▶ Identify the presence of gas unit heaters faults.
▶ Unlock the gas unit heaters in case of faults.
In case of summer ventilation operation, the fan opera-
tion is totally controlled by the OCDS008 digital chrono-
thermostat, in accordance with the daily programming or
with the manual setting.
In heating mode, the room temperature is read by the
NTC temperature probe of the OCDS008 chronothermo-
stat and compared with the setpoint temperature accord-
ing to manual or automatic mode (for further information
refer to the instructions of OCDS008 chronothermostat).
If the OSWR000 Genius software is used, the ambient
temperature of the specic zone will be the average of
the temperatures read by the NTC probes of the OTRG005
thermoregulators for that specic zone.
The burner is on until the setpoint temperature is
achieved, after which it is switched o until the hysteresis

OTRG005
OTRG005 thermoregulator
10 Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
threshold is achieved (Tsetpoint – HY). In this case, HY and
Tsetpoint are the hysteresis and setpoint temperatures of
the OCDS008 digital chronothermostat respectively.
For modulation management, see Paragraph 8.2 p.6 .
8.7 NTC PROBE
The NTC probe allows ambient temperature detection: it
protrudes through a suitable cable (length of about 7 cm)
from the bottom side of the device and can be calibrated
via the relative oset parameter (oF), which allows sub-
tracting a xed gradient to compensate for any overheat-
ing related to the installation or environment.
In the event of a fault, the heating function will not be
available, except in case of remote assisted mode: in this
case, the temperature read by the thermoregulator probe
is ignored by the system.
8.8 DETAILS ON REMOTE DEVICE
OPERATION
For the operation, adjustment and management of the
OTRG005 devices connected to the OCDS008 digital
chronothermostat (using OpenTherm protocol) and to
the OSWR000 Genius software (using Modbus protocol),
refer to the specic instructions.
Please note that, in case of loss of OpenTherm or Modbus
communication between the OTRG005 devices and the
remote system, due to any reason (failure of the OCDS008
chronothermostat, crash of the Genius software or of the
PC that host it, interruption or interference on the com-
munication line), a timeout time of 120 sec (2 minutes) is
started, after which the connected devices:
▶ If the safety temperature parameter is disabled (St = of,
default value) (Table 10.1 p.11 ), the gas unit heater
is switched o.
▶ If the safety temperature parameter is enabled (St =
between 3 and 25 °C), the gas unit heater is controlled
using the safety temperature as the new setpoint. In
this case, the display will show the SM value (safety
mode).
If activated, the safety mode can be deactivated by turn-
ing o the power to the device, or by pressing the , - or
+ buttons.
The safety mode is deactivated by default, and is
activated by setting a setpoint temperature in the
St parameter (range 3 ÷ 25 °C).
9 uSeR INTeRFaCe
The device has an interface through which the user can
understand the operating status of the managed gas unit
heater and provide the setup and all the actions necessary
for its operation.
9.1 DISPLAY
The display allows you to view the ambient temperature,
setpoint, and device setup parameters, as shown in Table
9.1 p.10 .
Table9.1Display views
Message Description
O (via the button in all modes)
O (via the button in all modes) with active keypad
lock
Rotary segment (system initialization: only after pow-
er-on)
Ambient temperature (measured by NTC probe)
Setpoint temperature (at keystroke - / +): the "CL" indica-
tion the demand for summer ventilation
Error 1 - Ignition/ame control device block
Error 2 - NTC probe fault
Error 4 - Overcoming 5 unlocks in 15 Minutes (remote)
Summer ventilation activated (temporary message,
duration about 2 seconds, ashing), when the setpoint
temperature is set to a value lower than 10 °C
Heating activated (temporary message, duration about 2
seconds, ashing), when the setpoint temperature is set
to a value between 10÷30 °C
Message Description
Economy mode heating activated (temporary message,
about 2 seconds, ashing)
Safety mode activated. It activates when the device loses
Modbus or OpenTherm connection
Temporary keypad unlock (temporary message, duration
about 2 seconds) if the keypad lock function has been
activated
9.2 OP LED RED  GAS HEATER
OPERATING LED
The OP led indicates the operating status of the managed
gas unit heater: Figure 9.1 p.10 shows the various views
provided.
Figure9.1OP led (red) views
A Heating mode: ignition, low power operation
B Heating mode: full power operation
C Summer mode: fan activated
D All other states (o)
A
B
C
D

Instruction sheet OTRG005 thermoregulator
OTRG005 11
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
9.3 COM LED GREEN  BUS PRESENCE
LED
The COM led indicates the presence of a remote commu-
nication (OpenThermо® or Modbus) as shown in Figure
9.2 p.11 .
In the case of Modbus communication, a brief blinking
signal signals the receipt of a command by the master re-
mote control.
Figure9.2COM led (green) views
A Local mode (J6 contact open, led o)
B Local mode (J6 contact closed, led o)
C Remote mode (OpenTherm communication)
D Remote mode (Modbus communication)
E Receiving data from remote control (Modbus mode only)
A
B
C
D
E
9.4 BUTTONS
Table 9.2 p. 11 shows the functions of the device
buttons.
Table9.2Buttons functions
Button Functions
• Turning the gas unit heater on/o (Lo parameter disabled)
RES/FUN
• Unlocking the ame controller/ignition device (press for at
least 3 seconds)
• Access to the parameter edit menu (press for at least 10
seconds)
• Scrolling parameters within the menu
-• Decrease setpoint temperature (local mode) • Summer ventilation activation (local mode)
• Editing (decrease) of the selected parameter
+• Increase setpoint temperature (local mode) • Summer ventilation deactivation (local mode)
• Editing (decrease) of the selected parameter
10 PaRameTeRS meNu
This menu allows you to modify some parameters used in
the thermoregulation functions.
How to access and edit parameters
1. Press the RES/FUN button for at least 10 seconds until
the blinking message appears.
2. To change the mode (Md) parameter, wait 2 seconds:
the set value will show (ashing). Use - or + buttons to
decrease or increase the parameter value.
3. To scroll through the other parameters, which are also
ashing, press the RES/FUN button and change the se-
lected parameter value as indicated in step 2.
4. To exit the menu and save the changes, scroll through
all the parameters using the RES/FUN button until the
temperature read by the NTC probe appears on the
display.
Table 10.1 p.11 shows available parameters.
Table10.1Parameters menu
Parameter Description Setting Default
Mode (Md)
Allows setting the remote assisted or remote independent
mode when the device is connected to a remote control
(OCDS008 or OSWR000).
0. remote independent
1. remote assisted 0
Hysteresis (HY)
Allows setting the hysteresis temperature (between one
shutdown and the next burner ignition). 0.1 ÷ 3.0 °C 0.5
Oset (oF)
Allows subtracting from the temperature read by the
NTC probe a specic value, to calibrate the reading of the
temperature probe.
0.0 ÷ 5.0 °C 1.5
Address (Ad)
To be used in case of Modbus communication; it provides
each thermoregulator with a specic address, which must
be dierent from that of all the other devices connected
to the same network. The value is hexadecimal.
01 ÷ F7 01
Modulation (Mo)
Allows operation of the gas unit heater in modulation or
in on/o mode.
0. on/o at minimum power
1. with modulation
2. on/o at maximum power 1
Dierential (di)
Allows setting the temperature dierential between
maximum power and economy operation. 0.0 ÷ 4.0 °C 1.0

OTRG005
OTRG005 thermoregulator
12 Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
Parameter Description Setting Default
Economy (Lo)
Allows, in local mode, the operation of the gas unit heater
in economy mode through J6 contact (for further details
see Paragraph 8.5.1.2 p.7 ).
of economy mode disabled
02 ÷ 25 °C economy mode setpoint of
Safety temperature (St)
Allows setting the local setpoint temperature when the
device is connected to a remote control system (OCDS008
ar OSWR000) and loses OpenTherm or Modbus commu-
nication.
of safety mode disabled
03 ÷ 25 °C safety mode setpoint of
Anti-condensation temperature (AC)
Allows setting the anti-condensation temperature, i.e. the
ambient temperature below which the gas unit heater
will always be activated at maximum power, if the param-
eter Mo is set to value 1 (with modulation).
If the Mo parameter is set to 0, the gas unit heater will
always be activated at minimum power, even if the
anti-condensation function is active.
01 ÷ 25 °C anti-condensation
mode threshold of
Keypad lock (LF)
Allows setting the keypad lock.
If active, the decimal point on the display ashes.
of disabled
onenabled of
11 CONNeCTIONS TO The GaS uNIT heaTeR
11.1 NEXTR SERIE GAS UNIT HEATER
How to connect the thermoregulator to the
Next-R gas unit heater.
Connection of the thermoregulator is made on the wiring
terminal block located in the electrical panel inside the
unit.
1. Access the gas unit heater terminal block.
2. Remove 27 and 28 temporary jumpers on the terminal
block.
3. Use cable 28 to make an electrical bridge between ter-
minals NC and 2 (Figure 11.1 p.13 ).
4. Use FRORR 7x1 mm² cable (available as OCVO015 op-
tional, with 5 m length).
5. Route the cable through the pre-punched hole on the
square plate.
6. Make electrical connections as described in Figure
11.1 p.13 and in Table 11.1 p.13 .
The cable may not be longer than 10 metres.
7. If the device is connected to other devices and/or
to remote controls (OCDS008 or OSWR000) use the
pre-punched holes provided on the rectangular side
plates and follow the instructions in Figure 8.8 p. 9
and 7.1 p.4 to make the connections.
If the device is used in local mode without using an
external request (Paragraph 8.5.1 p. 7 ), close J6
connector with an electrical bridge.

Instruction sheet OTRG005 thermoregulator
OTRG005 13
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
Figure11.1Connections between the thermoregulator and the gas unit heater
A OTRG005 thermoregulator
B NTC temperature probe (supplied)
C Next-R gas unit heater terminal block
D J6 electrical bridge
1
S2 S1
23567
NC
CNL
28
Z92 Z91
BI/WH
RS/PK
VE/GN
GR/GY
MA-BN
BL-BU
GN/YE
C
J1
J2
2
1
J3
J4
J5
J6
JP
1
2
1
2
3
4
5
2
12
12
1
MA-BN
BL-BU
GN/YE
VE/GN
GR/GY
RS/PK
BI/WH
B
A
D
Table11.1Connections between the thermoregulator and the gas unit heater
OTRG005 thermoregulator Next-R Recommended colour
Connector Terminal Type Description Terminal
J1 1 Input L phase 1 brown
2 Input N neutral N blue
J2
1 Input OF Gas unit heater operation feedback 5 grey
2 Output RES Reset of ignition/ame control device 7 green
3 Input LF Flame control locking state reading 6 yellow
4 Output FAN Control of the gas unit heater fan(s) C white
5 Output REQ Control of the ignition/ame control device Z91 pink
J3 1Input/output SI2 OpenTherm master interface (towards any subse-
quent thermoregulator of the control chain) - -
2 - -
J4 1Input/output SI3 Modbus RS-485 serial interface
(Terminal 1 = signal“B”– Terminal 2 = signal“A”) - -
2 - -
J5 1Input NTC probe input - -
2 - -
J6 1Input/output SI1 OpenTherm slave interface (towards OCDS008 digital chronothermostat or any previous
thermoregulator of the control chain)
- -
2 - -
JP / Input Selection jumper“impedance 120 Ω” - -
11.2 NEXTG SERIE GAS UNIT HEATER
How to connect the thermoregulator to the
Next-G gas unit heater
Connection of the thermoregulator is made on the wiring
terminal block located in the electrical panel inside the
unit.
1. Access the gas unit heater terminal block.
2. Use FRO-HP 7x0,75 mm² cable (available as OCVO015
optional, with 5 m length).
3. Route the cable through the pre-punched hole on the
square plate.
4. Make electrical connections as described in Figure
11.2 p.14 and in Table 11.2 p.14 .
The cable may not be longer than 10 metres.
5. If the device is connected to other devices and/or
to remote controls (OCDS008 or OSWR000) use the
pre-punched holes provided on the rectangular side
plates and follow the instructions in Figure 8.8 p. 9
and 7.1 p.4 to make the connections.
If the device is used in local mode without using an
external request (Paragraph 8.5.1 p. 7 ), close J6

OTRG005
OTRG005 thermoregulator
14 Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
connector with an electrical bridge.
Setting parameter P45
Remember to set parameter P45 on the GEN10
board on the Next-G gas unit heater to value 0. For
information on the procedure for setting the pa-
rameter, refer to the Next-G gas unit heater instal-
lation, use and maintenance manual.
Figure11.2Connections between the thermoregulator and the gas unit heater
A OTRG005 thermoregulator
B Room temperature probe (supplied)
C Next-G gas unit heater terminal block
D J6 electrical bridge
L N
AUX OUT ALARM
C NO NC
VENT. HEAT. RESET
L N
AUX OUT ALARM
C NO NC
J61
J60
J1
J2
2
1
J3
J4
J5
J6
JP
1
2
1
2
3
4
5
2
12
12
1
MA-BN
BL-BU
GN/YE
VE/GN
GR/GY
RS/PK
BI/WH
BI/WH
RS/PK
VE/GN
GR/GY
MA-BN
BL-BU
GN/YE
MA-BN
B
A
C
D
Table11.2Connections between the thermoregulator and the gas unit heater
OTRG005 thermoregulator Next-G Recommended colour
Connector Terminal Type Description Terminal
J1 1 Input L phase L AUX brown
2 Input N neutral N AUX blue
J2
1 Input OF Gas unit heater operation feedback "RESET" grey
2 Output RES Reset of ignition/ame control device "RESET" green
3 Input LF Flame control locking state reading NO (ALARM) yellow
4 Output FAN Control of the gas unit heater fan(s) "VENT." white
5 Output REQ Control of the ignition/ame control device "HEAT." pink
J3 1Input/output SI2 OpenTherm master interface (towards any subse-
quent thermoregulator of the control chain) - -
2 - -
J4 1Input/output SI3 Modbus RS-485 serial interface
(Terminal 1 = signal“B”– Terminal 2 = signal“A”) - -
2 - -
J5 1Input NTC probe input - -
2 - -
J6 1Input/output SI1 OpenTherm slave interface (towards OCDS008 digital chronothermostat or any previous
thermoregulator of the control chain)
- -
2 - -
JP / Input Selection jumper“impedance 120 Ω” - -

Instruction sheet OTRG005 thermoregulator
OTRG005 15
Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
11.3 M SERIE GAS UNIT HEATER
How to connect the thermoregulator to the M
gas unit heater
Connection of the thermoregulator is made on the wiring
terminal block located in the electrical panel inside the
unit.
1. Access the gas unit heater terminal block.
2. Use FRO-HP 7x0,75 mm² cable (available as OCVO015
optional, with 5 m length).
3. Route the cable through the pre-punched hole on the
square plate.
4. Make electrical connections as described in Figure
11.3 p.15 and in Table 11.3 p.15 .
The cable may not be longer than 10 metres.
5. If the device is connected to other devices and/or
to remote controls (OCDS008 or OSWR000) use the
pre-punched holes provided on the rectangular side
plates and follow the instructions in Figure 8.8 p. 9
and 7.1 p.4 to make the connections.
If the device is used in local mode without using an
external request (Paragraph 8.5.1 p. 7 ), close J6
connector with an electrical bridge.
Figure11.3Connections between the thermoregulator and the gas unit heater
A OTRG005 thermoregulator
B NTC temperature probe
C M gas unit heater terminal block
D J6 electrical bridge
9
6 71C1 2 3 5 8 10 11
C
J1
J2
2
1
J3
J4
J5
J6
JP
1
2
1
2
3
4
5
2
12
12
1
MA-BN
BL-BU
GN/YE
VE/GN
RS/PK
BI/WH
BI/WH
RS/PK
VE/GN BL-BU GN/YE
BA
MA-BN
D
Table11.3Connections between the thermoregulator and the gas unit heater
OTRG005 thermoregulator M Recommended colour
Connector Terminal Type Description Terminal
J1 1 Input L phase 1 brown
2 Input N neutral 9 blue
J2
1 Input OF Gas unit heater operation feedback - -
2 Output RES Reset of ignition/ame control device 7 green
3 Input LF Flame control locking state reading 6 yellow
4 Output FAN Control of the gas unit heater fan(s) 2 white
5 Output REQ Control of the ignition/ame control device 11 pink
J3 1Input/output SI2 NTC probe input - -
2 - -
J4 1Input/output SI3 Modbus RS-485 serial interface
(Terminal 1 = signal“B”– Terminal 2 = signal“A”) - -
2 - -
J5 1Input NTC probe input - -
2 - -
J6 1Input/output SI1 OpenTherm slave interface (towards OCDS008 digital chronothermostat or any previous
thermoregulator of the control chain)
- -
2 - -

OTRG005
OTRG005 thermoregulator
16 Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
OTRG005 thermoregulator M Recommended colour
Connector Terminal Type Description Terminal
JP / Input Selection jumper“impedance 120 Ω” - -

OTRG005
OTRG005 thermoregulator
20 Rev.: F
Cod.: D-FST422 22 MCL SDC 008 29/04/2022
1 Premise....................................................................................... p.1
1.1 QRCode.................................................................... p.1
1.2 Available languages ............................................ p.1
1.3 Use............................................................................. p.1
1.4 Key to symbols ...................................................... p.1
2 Warnings................................................................................... p.1
3 Description............................................................................. p.1
4 Features...................................................................................... p.2
5 Technical data..................................................................... p.2
6 Installation.............................................................................. p.3
7 Connection diagram.................................................... p.4
8 Operation................................................................................. p.5
8.1 Heating mode operating logic........................ p.5
8.2 Modulation management................................. p.6
8.3 Anti-condensation mode management...... p.6
8.4 Keyboard lock........................................................ p.6
8.5 Local mode ............................................................. p.6
8.6 Remote mode........................................................ p.8
8.7 NTC probe ............................................................. p.10
8.8 Details on remote device operation............ p.10
9 User interface.................................................................... p.10
9.1 Display.................................................................... p.10
9.2 OP Led (red) - Gas heater operating led..... p.10
9.3 COM led (green) - BUS presence led............ p.11
9.4 Buttons................................................................... p.11
10 Parameters menu.......................................................... p.11
11 Connections to the gas unit heater.......... p.12
11.1 Next-R serie gas unit heater............................ p.12
11.2 Next-G serie gas unit heater........................... p.13
11.3 M serie gas unit heater..................................... p.15
INDEX OF CONTENTS
DISPOSAL
The appliance and all its accessories must be disposed of separately in accordance with the regulations in force.
Use of the WEEE symbol (Waste Electrical and Electronic Equipment) indicates that this product cannot be disposed of
as household waste. Proper disposal of this product helps to prevent potential negative consequences for the environ-
ment and human health.