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Copyright © 2012 SyxthSense Ltd. All rights reserved - 02/2012

PS CT2.80 - 1/14

NR9000 Modbus Fan Coil Unit Controller

NR9000 is an advanced controller for 2-, 4-pipe or air-side fan coil units with ON/OFF, 3-POINT floating or modulating 0..10V control valves as well as with 3-speed or modulating fan. NR9000 is equipped with Modbus (Slave) communication protocol enabling the communication with any Modbus master device.

NR9000 is comes with a standard M6 DIN rail enclosure and links to a flush mounting remote terminal (NR9000-RT) with integrated room terminal sensor.

The controllers can operate as a networked solution or as stand-alone. However the NR9000 and NR9000-RT do not have internal clock. Time schedule must be programmed by a supervisory Modbus system.

Product sheet CT2.80

Type NR9000

Model Types Model Description

NR9000 85-265V Fan Coil Unit Controller

NR9000-RT1A Room Interface Unit, Flush Mounted, Anthracite (other colours available)

NR9000-RT1B Room Interface Unit, Flush Mounted, White (other colours available)

NR9000-RT2A Room Interface Unit, Wall Mounted, Anthracite (other colours available)

NR9000-RT2B Room Interface Unit, Wall Mounted, White (other colours available)

Technical Data Power supply 85..265VAC (isolated)

Inputs 4 x Digital Inputs (Window Contact, Remote Switch Off, Summer/Winter Change-Over, Comfort/Economy)1 x Resistive Input; Return Temperature Sensor1 x Resistive Input; Remote Temperature Setpoint1 x Resistive Input; Auxiliary Loop Sensor1 x Resistive Input; Auxiliary Loop SetpointSe

Outputs 2 x 24..230V 4A Triacs (Heating)2 x 24..230V 4A Triacs (Cooling)3 x 24..230V 8A Relays (3-Speed Fan Control)2 x Open Collector (Additional Digital Outputs)2 x 0..10Vdc Outputs (Heating and Cooling, or Modulating Fan)

Communications Network: RS-485 Modbus RTURoom Interface: TX/RX Comms BusInterconnect: TTL Link Bus

Wiring Terminals Pluggable Terminal Blocks1.5 mm2

Operating Temp 2..45°C

Storage Temp -25..+65°C

Operating Humidity 0..85% rH non-condensing

Enclosure IP20, DIN-rail Mounted

SyxthSense Ltd

PS CT2.80 - 2/14

INPUTS • Digital Input Window Contact.

• Digital Input Remote Power off.

• Digital Input Winter/Summer Change Over.

• Digital Input Comfort/Economy.

• Analog Input Return Temperature Sensor.*

• Analog Input Remote Temperature Set.*

• Analog Input (S3) Auxiliary loop sensor

• Analog Input (S4) Auxiliary loop set selector

“Remote Power off” or “Comfort/Economy” digital inputs can be used to interface the controller with a Presence Detector to minimize costs for heating and cooling.

When digital inputs are in use they have priority on remote sensor and supervisory system.

* Sensors with a sensing element NTC10K Ohm @ 25°C. Accuracy ± 1K, β @ 25°C = 3435

Digital inputs can be enabled using a NR9000 configuration tool. The default status of digital inputs (factory setting) is the following:

For example, in case the window switch is normally opened (closed window is equivalent to open contact) it is necessary to reverse the action of the digital input.

OUTPUTS • 4 TRIAC Outputs to drive 3P valves (HOT valve and COOL valve). Contact Rating 24..250V 4 A;

•3 RELAY Outputs to drive 3 speed FAN (V1, V2, V3). Con- tact Rating 24..250V 8 A;

•2 Analog Output 0-10V to drive proportional valves. It is possible to use 0-10V outputs to drive a modulating FAN plus modulating valves in sequence (0-5/6-10).

•2 Open Collector Outputs: OC1 and OC2. They have a maximum load of 18mA and can be used to drive 12Vdc relays whose maximum power is 220mW and winding resistance >= 640Ohm.

•OC1 output follows the ON/OFF input and it can be used, through an external relay, to enable electrical loads. If the local operation mode is enabled (through controller password) OC1 follows the input DI2 (over- ride turn off), so if DI2 is open, OC1 is ON too, instead if DI2 input is closed, OC1 is OFF too. If the local ope- ration mode is disabled, OC1 follows the value set at

9011 ModBus address.

•OC2 output is used to enable auxiliary functions de- scribed in the “Controller functions” paragraph. If the temperature sensor S3 is present, the ON/OFF auxiliary loop which controls OC2 will be automatically enabled; otherwise it is possible to enable the electrical coil in emergency (through controller password) which controls OC2. If the sensor S3 is not present, OC2 follows the value set at 9013 ModBus address.

• Bus to connect Remote Terminal NR9000-RT.

• Bus Modbus to connect Supervisor System.

• Bus Link to connect IO expansion.

Standards EN60730-1 EN60730-2-9 LVD Directive

DIGITAL INPUT DEFAULT DESCRIPTION

WINDOW CONTACT N.C (normally closed)

OPEN – window opened

CLOSE – window closed

REMOTE POWER OFF N.O (normally open)

OPEN – Comfort

CLOSE – off (frost protection)

WINTER/SUMMER

CHANGEOVER N.O (normally open)

OPEN – winter

CLOSE – summer

COMFORT/ECONOMY N.O (normally open)

OPEN – Comfort

CLOSE – economy

SyxthSense Ltd

PS CT2.80 - 3/14

INSTALLATION NR9000 are suitable for mounting on a DIN rail with a quick coupling; NR9000-RT is suitable for wall mounting or flush mounting in A503 electrical Box with B-TICINO (Living & Light) and VIMAR (Plana & Idea) finishing plates.

Connections shall be in compliance with existing rules and using max 2,5mm2 cross section wires for J1 and J2 terminals and 1,5mm2 cross section wires for J3 and J4.

To use wire terminals on power supply wires follow the instructions in order to prevent accidental contacts between cables at different voltages in case of wrong installation.

The main power is fully isolated but we suggest to install a protection device compliant to existing national rules with a 125mA intervention threshold and a minimum 3mm contact opening. The device is not supplied with the product.

MAINTENANCE The controller is maintenance free.

WIRING DETAILS WARNING:The electrical installation, device connection and commissioning can only be carried out by qualified professionals and according to the local wiring regulations! Ensure that the power is isolated during wiring.

CON

N

# pin

Signal Direction

Type of signal Description

J1

1 F input 85-265Vac phase Power supply

2 N input 85-265 neutral Power supply

3 HOT_CL output 24..230Vac TRIAC 4A Heating valve (Close)

4 HOT_CO output 24..230Vac TRIAC COM Heating valve (Com)

5 HOT_OP output 24..230Vac TRIAC 4A Heating valve (Open)

6 COLD_C output 24..230Vac TRIAC 4A Cooling valve (Close)

7 COLD_C output 24..230Vac TRIAC COM Cooling valve (Com)

8 COLD_O output 24..230Vac TRIAC 4A Cooling valve (Open)

SyxthSense Ltd

PS CT2.80 - 4/14

CONFIGURATION OPTIONS The internally stored parameters used by the controller during operation can be changed using NR9000-RT Remote Sensor or using a Supervisory System (MODBUS protocol). Remote Sensor NR9000-RT allows to change the operation mode, the set point and the fan speed; all other parameters can be modified only through the supervisory system or the dedicated configuration tool. The controller can operate also without the Re- mote Sensor using a dedicated analog input (Return Sensor).

The controller will take the data coming from the Sensor and from the Supervisory system (if present) and will perform a P or PI or PID regulation to drive the valves and the fan.

The controller can operate also without NR9000-RT and supervisory system (Modbus). In this case the room temperature is measured by the return sensor and thanks to the remote selector is possible to set the correction of the temperature. In this configuration, the control parameters can be changed only through a dedicated configuration tool.

SYSTEM CONFIGURATION

The system can be configured as shown in the following diagrams

J2

9 RA_COM output 24..230Vac com Fan Speed Com

10 R1 output 24..230Vac RELE’ 8A V1 Fan Speed

11 R2 output 24..230Vac RELE’ 8A V2 Fan Speed

12 R3 output 24..230Vac RELE’ 8A V3 Fan Speed

13 RB_COM output Not used

14 - N/A Not used

15 - N/A Not used

16 - N/A Not used

J3

40 DI1 input digital 1 /24Vac Window contact

39 DI2 input digital 2 /24Vac ON-OFF contact

38 DI3 input digital 3 /24Vac Winter/Summer contact

37 DI4 input digital 4 /24Vac Comfort-economy contact

36 DI_COM input digital COM Com

35 S1 input analogue input Return sensor

34 S2 input analogue input Remote setpoint

33 S3 input analogue input Auxiliary Loop Return Sensor

32 S4 input analogue input Remote Set Auxiliary Loop

31 S_COM input com Com

30 OCC output Com Open Collector +12V Com Open Collector +12V

29 OC1 output Open Collector 1Open Collector for external RELAY1

J4

28 OC2 output Open Collector 2Open Collector for external RELAY2

27 AO2 outputAnalogue output 2 Modulating cooling valve 2 – sequence

26 AO1 outputAnalogue output 1 Modulating heating valve 1 – fan

25 AOC output Com Com / Shield

24 485- Bidir BUS RS485 - Modbus RTU Bus (-)

23 485+ Bidir BUS RS485 + Modbus RTU Bus (+)

22 +12Vcc output 12V (sensor NR9000-RT) 12V (sensor NR9000-RT)

21 SDA Bidir BUS TX (sensor NR9000-RT) BUS TX (sensor NR9000-RT)

20 SCL Bidir BUS RX (sensor NR9000-RT) BUS RX (sensor NR9000-RT)

19 GND Bidir GND (sensor NR9000-RT) GND (sensor NR9000-RT)

18 TTL+ Bidir Link Bus + Bus I/O expansion +

17 TTL- Bidir Link Bus - Bus I/O expansion -

SyxthSense Ltd

PS CT2.80 - 5/14

Controller + Remote Sensor

 

Controller (Stand Alone)

 

N Controllers + 1 Remote Sensor

In this configuration all the controllers will communicate with the controller connected to the remote sensor using LINK bus. All the controllers will operate in the same way (IO expansion).

 

SyxthSense Ltd

PS CT2.80 - 6/14

N Controllers + N Remote Sensor + Supervisor

OPERATING MODES NR9000 works with 3 different operation modes:

oCOMFORT: the controller will control the temperature (driving valves and fan) to satisfy the Comfort Temperature Set.

oECONOMY: the controller will control the temperature to satisfy the Economy Temperature Set.

oFROST PROTECTION: the controller is normally OFF; just during winter operation it works with a set fixed at 8°C and heating function only.

SUMMER/WINTER CHANGE-OVER

The summer / winter changeover is used by the controller to reverse the action (Hot / Cold) in 2-pipe systems and to determine whether to add or subtract the temperature correction in Economy mode. This information can be defined through a dedicated digital input or via parameter and it can be set by the supervisory system or by a configuration tool using MODBUS protocol.

NOTE: by default Summer/Winter changeover is set by remote mode; in stand alone plants it has to be preconfigured in local mode;

INITIAL VALVE POSITION To drive a 3-point actuator is necessary to place the actuator in a specific position.

Each time the controller is powered up, the actuator will be driven in the closing position for a time equal to the overall travel time plus 33%.

ACTUATOR CUT-OFF This function is used to stop the control of the 3 points actuator after the overall travel time plus 33%. This function is used to ensure the correct valve closing and to reduce the noise.

WINDOW CONTACT This function is used to save energy when a Normally Closed contact is opened (Open Window). In this case the controller will change the operation mode from Comfort to Economy.

HOT/COLD START-UP OPERATION

This function is used to avoid the introduction of cold or hot air in the ambient by delaying (for a set time) the fan start.

To disable the function, set the time = 0.

"DISPOSAL" FUNCTION The "Disposal" function is useful both for the hot and the cold channel and it helps to take off the energy stored in the fan coil radiator by delaying the fan turning off.

To disable the function, set the time = 0.

AUXILIARY REGULATION ON/OFF

This function can be automatically enable when the sensor in position S3 is connected. If the remote set in S4 is connected, it is possible to have a set in the range 10-30°C, otherwise it can be set through the supervisory system together with the dead zone.

If the supervisory system is not present , this function will be carried on at fixed point 20°C with dead zone = 1K. The output will be available in OC2 and it will exclude the management of the electrical coil.

AIR CIRCULATION FUNCTION

This function manages the minimum fan speed. It is enabled setting a "period" and a "minimum speed" different from zero. When the "period" will be passed, the fan will be enabled at the minimum speed for the time (minutes) set.

MINIMUM SPEED ACTIVATION

This function is used to prevent air stratification, especially when using the Return Sensor, as it could be very low sensitive to temperature variation that occurs at man's height. A conti- nuous air movement helps to avoid /reduce air stratification and to optimize the regulation.

A system configuration with Proportional Fan requires setting

the minimum speed in % of the control value (0 - 10V). To disable this function, set 0 as minimum speed.

SyxthSense Ltd

PS CT2.80 - 7/14

ELECTRICAL COIL Electrical Coil function can be enabled in the configuration tool as "emergency".

The output provides an open collector signal (OC2) (with reference to signal pin 30, +12 v) to control an external auxiliary relay.

The output is activated when the room temperature is lower than:

"hot" operation set - Proportional Band - 1°C

And it goes off when the room temperature is higher than: "hot" operation set - proportional band

CONTROL MODES NR9000 works with 7 different control modes selectable via dip switch or by supervisory system:

1.ON/OFF Valves and 3-speed fan ("FAST" operation mode- Operation Diagram 1).

2.ON/OFF Valves and 3-speed fan (Operation Diagram 2).

3.3-point Valves and 3-speed fan (Operation Diagram 3).

4.ON/OFF Valves and 1-speed fan (Operation Diagram 4).

5.3-point Valves and 1-speed fan (Operation Diagram 5).

6.ON/OFF Valves and Modulating FAN (0 - 10 V) (Operation Diagram 6).

7.0-5/6-10 Sequence Valves and Modulating FAN (0 - 10 V). (Operation Diagram 7).

The 0-10V proportional outputs are always presents and they follow the ON-OFF (or 3-point) valves characteristics.

The diagrams of the valves and fans share the Set point.

To make the interaction of the two devices as flexible as possible the different proportional bands / Hysteresis have been thought as independent in order to define a variety of programs adaptable to different environmental situations.

It is possible to enable the following function with a priority over normal operation defined by the diagrams:

o HOT/COLD START-UP

o "DISPOSAL" FUNCTION

o MINIMUM SPEED ACTIVATION

1. ON/OFF Valves and 3 Speed FAN - "FAST" operation mode

The valves are activated in ON- OFF mode with a hysteresis. Speed 1 is ON when the error (E) is greater than 10%

TSET-T

SyxthSense Ltd

PS CT2.80 - 8/14

E % = ----------- * 100

PB

Speed 2 and 3 follow to the Proportional Band as shown in the following diagram.

2. ON/OFF Valves and 3 Speed FAN

The valves are activated in ON- OFF mode with a hysteresis. Speed 1, 2 and 3 follow to the Proportional Band as shown in the following diagram

3. 3 point valves and 3 Speed FAN

The valves are activated in Proportional mode (0-100%) using the set proportional band. Speed 1, 2 and 3 follow to the Proportional Band as shown in the following diagram

4. ON/OFF valves and 1 Speed FAN

The valves are activated in ON- OFF mode with hysteresis. Speed 1 follows to the Proportional Band as shown in the fol- lowing diagram

5. 3 point valves and 1 Speed FAN

SyxthSense Ltd

PS CT2.80 - 9/14

The valves are activated in Proportional mode (0-100%) using a proportional band. Speed 1 follows to the Proportional Band as shown in the following diagram

6. ON/OFF Valves and Proportional Speed Fan (0-10V)

The valves are activated in ON- OFF mode with hysteresis. Speed fan follow to the Proportional Band as shown in the following diagram generating a 0-10V output control signal.

7. 0-5/6-10 V Sequence Valves (Air Side Control) and Proportional Speed Fan (0-10V)

The valves are activated in sequence mode (0-5/6-10) with hysteresis. If the set is satisfied the output is 5.5V.Fan speeds follow the Proportional Band as shown in the following diagram generating a0-10V output control signal.

DIP SWITCHES The controller has 8 dip switches accessible by removing the top cover and two LEDs to check the operation.

Dip switches from 1 to 4 can be used to set MODBUS devices address (up to 14) without the use of the configuration tool and to set the controller in expansion mode duplicating the outputs. If DIP 1-4 are all ON the controller is configured as expansion, duplicating the master controller outputs connected to the remote sensor (NR900-RT) and/or to the supervisory system.

If dip switches 1 to 4 are all OFF the default ModBus address is 1 (factory eeprom setting).

In case of more than 14 devices, configuration can be carried out via supervisory system or using a configuration tool via Modbus protocol.

Dip from 5 to 7 are used to select the operation diagram.

If dip 5 to 7 are OFF the default operation diagram is nr. 2 - ON/ OFF Valves and 3 Speed FAN (factory eeprom setting).

Dip 8 is used to select 2/4 pipe system.

If dip 8 is OFF the system is 2 pipe (factory eeprom setting). Parameters set by dip have the priority over the supervisory system. It is possible to disable the dip switch setting by ModBus. It is necessary to power down and power up the controller in case of any change in dip switches configuration.

DIP1 DIP2 DIP3 DIP4 MODBUS ADDRESS

OFF OFF OFF OFF factory settings (default address1)

ON OFF OFF OFF 1

OFF ON OFF OFF 2

ON ON OFF OFF 3

OFF OFF ON OFF 4

ON OFF ON OFF 5

OFF ON ON OFF 6

ON ON ON OFF 7

OFF OFF OFF ON 8

ON OFF OFF ON 9

OFF ON OFF ON 10

ON ON OFF ON 11

OFF OFF ON ON 12

ON OFF ON ON 13

OFF ON ON ON 14

ON ON ON ON controller used as IO expansion

 

SyxthSense Ltd

PS CT2.80 - 10/14

LED OPERATION The controller has two LEDs accessible by removing the top cover to check the operation.

DIP5 DIP6 DIP7 CONFIGURATION DIAGRAM

OFF

OFF

OFF

ON/OFF Valves and 3 FAN speed (factory setting)

ON OFF

OFF

ON/OFF Valves and 3 FAN speed “FAST” (Operating Diagram 1)

OFF

ON OFF

ON/OFF Valves and 3 FAN speed(Operating Diagram 2)

ON ON OFF

3-point Valves and 3 FAN speed(Operating Diagram 3)

OFF

OFF

ONON/OFF Valves and 1 FAN speed(Operating Diagram 4)

ON OFF

ON3-point Valves and 1 FAN speed(Operating Diagram 5)

OFF

ON ONON/OFF Valves and Modulating FAN (0 –10 V) (Operating Diagram 6)

ON ON ON0-5/6-10 Sequence Valves and ModulatingFAN (0 – 10 V). (Operating Diagram 7)

DIP 8 SYSTEMOFF 2 pipes

ON 4 pipes

RED LED GREEN BLINKING RATE DESSCRIPTION

BLINKING OFF 1Hz - DUTY CYCLE 50%

HEATING VALVE OPENED

OFF BLINKING 1Hz - DUTY CYCLE 50%

COOLING VALVE OPENED

BLINKING BLINKING 1HZ - DUTY CYCLE 10%

HEATING AND COOLING VALVE CLOSED

ON ON NA REMOTE SENSOR COMMUNICATION

ON BLINKING 2HZ - DUTY CYCLE 50%

LOCAL SENSOR ERROR

SyxthSense Ltd

PS CT2.80 - 11/14

Note: for a 2-pipe system the only connected valve is the "heating" valve and so the only operation led for hot and cold fluid is the Red led.

DEFAULT PARAMETERS

Parameter Vmin Vmax Default

Hot Loop Set Point 100 (10°C) 350 (35°C) 200 (20°C)

Stroke Time for 3 Points actuators 30 (SEC) 480 (SEC) 60 (SEC)

Derivative Constant for hot loop 1 (SEC) 1000 (SEC) 1 (SEC)

Derivative Constant for cool loop 1 (SEC) 1000 (SEC) 1 (SEC)

Dead Zone 0 (0°C) 100 (10°C) 20 (2°C)

Set Loop Auxiliario 100 (10°C) 350 (35°C) 200 (20°)

Set adjustment for Economy operation mode 0 (0°C) 40 (4°C) 30 (3°C)

Action Type P(0), PI(1), PID(2) 0 2 0 (P)

Proportional Band Heating Valve 5 (0.5°C) 80 (8°C) 10 (1°C)

Proportional Band Cooling Valve 5 (0.5°C) 80 (8°C) 10 (1°C)

Proportional Band Heating Fan 5 (0.5°C) 80 (8°C) 30 (3°C)

Proportional Band Cooling Fan 5 (0.5°C) 80 (8°C) 30 (3°C)

Integration Time Heating loop 1 (MIN) 30 (MIN) 5 (MIN)

Integration Time Cooling loop 1 (MIN) 30 (MIN) 5 (MIN)

Cut Off Function with Extra stroke of 33% 0 1 1 (ENABLE)

Summer/Winter Changeover 0 1 0 (WINTER)

Operation Mode: COMFORT(0), Economy(1), Frost(2) 0 2 0 (COMFORT)

Delay Time Fan Start 0 255 0 (DISABLE)

Delay Time Fan Stop 0 255 0 (DISABLE)

Minimum fan speed 0 50 0 (DISABLE)

Controller Modbus Address 1 250 1

Operation Diagram 1 7 2

2/4 Pipe system 0 1 0 (2 PIPE)

NR9000-RT (*) “STATUS WORD” 0 8 8 (FULL ENABLE)

NR9000 (**) “STATUS WORD” 0 255 0

Fan Operation Mode (STOP(0),V1(1),V2(2),V3(3),AUTO(4)) 0 4 4 (AUTO)

Digital Inputs reverse action (4 BIT, N.O(0),N.C.(1)) 0 15 1Bit0: WINDOW CONTACT (N.C) Bit1:REMOTE POWER OFF (N.A.)Bit2:W/S CHANGEOVER (N.A.) Bit3: COMFORT/ECONOMY (N.A.)

Relay Commutation Time delay (Fixed 1 sec) 0 1 1 (ENABLE)

Auxiliary loop hysteresis Auxiliary loop direct/reverse action Air recirculation function PeriodAir recirculation function time

0 (0.5°C)00 (min)1 (min)

80 (8.0°C)160 (min)10 (min)

10 (1.0°C)10 (min)1 (min)

SyxthSense Ltd

PS CT2.80 - 12/14

CONTROLLER STATUS WORD

SENSOR STATUS WORD

NR9000 DIIMENSIONS

B “0” “1” DESCRIPTION

0Remote (Disable digital input Comfort/ Economy and Power Off)

Local (Enable digital input Comfort/Economy and PowerOff) Operation Mode

1 Remote (comes from NR9000-RT) Local (comes from “dedicated” analog input S1) Ambient Temperature

2Remote (Disable digital input Summer/ Winter DI3) Local (Enable digital input Summer/Winter DI3)

Summer / WinterChangeover

3 Remote (comes from NR9000-RT) Local (comes from “dedicated” analog input S2) Temperature Set

4 Disable digital input DI1 Enable digital input DI1 Window Contact

5 10-35°C ±3KTemperature Set CorrectionMode

6 Enable Disable Dip Switches

7 Disable Enable Electrical Battery

Value Configuration

0 Display Off “---”

1 Display “Only” RoomTemperature in page 0

2 Display “Only” Temperature Set in page 0

3 Display Room Temperature in page 0 with T. Set, Fan e Mode “fixed”.

4 Display Room Temperature in page 0 with T. Set, Fan “fixed” e only Mode “editable”

5 Display Temperature Set in page 0 with Fan e Mode “fixed”.

6 Display Temperature Set in page 0 with Fan “fixed” e only Mode “editable”

7 All enabled with Set Correction +-3K

8 All enabled with Temperature Set 10 - 35°C

SyxthSense Ltd

PS CT2.80 - 13/14

NR9000 ROOM INTERFACE UNIT

The remote sensor has 4 buttons and a 3 digit display. The functions of the sensor are:

o Room Temperature Monitoring (T AMB).

o Temperature Set (button 2 & 3).

o Fan Speed Set (Auto, OFF, V1, V2, V3) (button 1).

o Operation Mode Set (Button 4).

The sensor has several configurations (enabled/disabled functions) that can be defined by the controller:

o Set Point Disabled

In this case the controller does not allow the user to change the set point from the Remote Terminal.

o Fan Speed Disabled

In this case the controller does not allow the user to change the fan speed from the Remote Terminal.

o Operating Mode Disabled

In this case the controller does not allow the user to change the operation modes from the Remote Terminal.

o Remote Sensor Disabled

In this case the controller does not allow the user to change all the function listed above and the remote terminal can show and send to controller only the room temperature.

It is possible to calibrate the room temperature displayed on the remote sensor of ± 3°C (label tAr) and to read and set the MODBUS address (label Add) of the controller connected to the sensor following these instructions:

o press button 4 and reach the off status

o press for more than 10s the button 1 (FAN)

All functionality is enabled by default.

The remote sensor has a two-coloured led to identify the operation mode as shown in the following tables:

WIRING CONNECTIONS

NR9000-RT is connected to NR9000 by means 4 wires, 2 for +12V power (pin 4) and GND (pin 1) and 2 for data (pin 2 and 3). For wiring is suggested Belden ®, model 9502 - 2 pairs (one pair for power and one pair for data. Maximum length for the cabling is 30m

NR9000-RT1X DIIMENSIONS

Operation Mode LED colour

Comfort green

Economy orange

Frost Protection blinking green

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 guarantee is available on request from the seller.

SyxthSense Ltd

PS CT2.80 - 14/14

NR9000-RT2X DIIMENSIONS