SyxthSense SST-A24-302, SST-A24-304, SST-A24-306, SST-A230-302, SST-A230-304 User Manual

...

Online store: www.syxthsense.com

Enquiries: T: 0844 840 3100 F: 0844 840 3200

PS TH6.90 - 1/5

SST Series Digital Thermostats

SST series are elegant thermostats with a large clear LCD screen. The thermostats are operated with five high quality buttons. The SST range is available with a range of models to suit most heating applications.

The SST thermostats can be extensively applied for residential, indu

strial and commercial environment. The thermostats have switching rating of up to 16A 230V making them suitable for both wet systems and electrical heating systems.

Depending on the model, the thermostats can operate using inter

nal or external sensor and can have an additional high limit floor sensor.

The SST range has RS485 communication capability making them idea

l for multi-zone and for high energy efficiency applications.

Features

• 24VAC or 230VAC Power Supply

• Large Digital Display with Back-Light

• Flush Mounted for Sophiticated Look

• Switching rating up to 16A 230V

• Celcius / Fahrenheit Display

• Low Temperature Protection

• Unique Lockable Keypad

• RS-485 Modbus Communication Network

• All temperature readings and settings ava

ilable via Network

Product sheet TH6.90

Thermostat Type SST

Model Type Model Description

SST-A24-302 Digital Thermostat, 24Vac, Floor Sensor

SST-A24-304 Digital Thermostat, 24Vac, Internal/External Sensor

SST-A24-306 Digital Thermostat, 24Vac, Internal/External and Floor Sensor

SST-A230-302 Digital Thermostat, 230Vac, Floor Sensor

SST-A230-304 Digital Thermostat, 230Vac, Internal/External Sensor

SST-A230-306 Digital Thermostat, 230Vac, Internal/External and Floor Sensor

SST-RB-01 Flying Lead Floor Temperature Sensor

SST-RC02 Infrared Remote Control for the Room Thermostats

TEFM-NTC100K Flush Mounted NTC100k Temperature Sensor

Technical Data Power Supply A24 Models: AC24V ± 10%, DC24V

A230 Models: AC230V ±10% 50/60Hz

Power Consumption < 1W

Switching Voltage AC220V ± 10% 16A SPST N/O (Resitive Load)

Output Signal ON/OFF

Measurement Range 5..95°C

Accuracy 0.5°C/F

Working Temperature 0..70°C

Sensor Characteristics NTC100kOhm

Setpoint Range 5 to 95°C/F

Terminals Max 2.5 mm

(min 0.5mm2)

Communication RS485 Modbus RTU, up to 32 devices (logical address range 1..32)

Modbus Settings 9600 baud, 8 Data Bits, None Parity, 1 Stop Bit, Maximum Setpoint

Writes 100,000 Cycles (Holding Register)

Color White with Glass Panel

SyxthSense Ltd

PS TH6.90 - 2/5

Online store: www.syxthsense.com

Enquiries: T: 0844 840 3100 F: 0844 840 3200

Operating Instructions Unit On/Off

UP button

DOWN button

CLOCK button (not in use)

HOLD button

OFF button

INSIDE

SET TEMP

°C

Current Setpoint (Resolution 1°C)

Current Temperature (Display Resolution 0.5°C)

Press OFF button to turn ON or OFF the thermostat.

Temperature Setting

When the thermostat is ON, press UP or DOWN butto

ns to set the desired temperature. If the temperature is set at "- -", the thermostat is disabled.

Manual Temperature Override

When the thermostat is ON, press the button H t

o display the HOLD icon. The thermostat is overridden ON at the current setpoint until the override has been cancelled. The HOLD button is a quick way to freeze the current setpoint.

Keypad Lock Function

Simultaneously press UP and DOWN buttons for 1

0 seconds to lock the thermostat. The LOCK icon is displayed on the thermostat. In this mode it is not possible to adjust the temperature setpoint. As default it is possible to switch the thermostat OFF. All user interactions can be disabled via advanced configuration parameters.

To unlock the thermostat, press UP and DOWN buttons again simultaneously for 10 seconds. The LOC

K icon on the thermostat disappears.

Thermostat ON/OFF Timer (with Remot

e Control only)

When this function has been set via remote control, the

TIMER icon is displayed together with the

counting down time.

Error Display

When errors occur on the themostat, the ERROR ico

n is displayed together with error code. The

following list describes the error codes.

• 1 =Internal Temperature Sensor Error

• 2 =External Temperature Sensor Error (if re

quired change the sensor selection under the

advanced configuration options)

• 3 = Floor Temperature Sensor Error

• 10 = Internal Data Storage Display

Communication Display

When the COMMUNICATION icon is displayed, the ther

mostat is communicating with the network

master.

Low Temperature Protection The thermostats has low temperature protection feature.

If the measured temperature drops below the frost setpoint (default 7°C), the thermostat relay is switched ON even if the thermostat has been turned off from the ON/OFF button.

The Low Temperature Protection feature can be disabled in the Advanced Configur

ation Parameters.

Housing ABS Flame Retardant

Mounting

Flush Mounting (wall mounting using a separate box)

Dimensions W86 x H86 x D14.5 mm

Environmental Conditions Operating Temp 0..+50°C

Humidity Limits 0..95% rH non-condensing

Storage Temp -20..+50°C, Humidity <95% rH

Environmental Standards

IEC721-3-3, Climatic Conditions Class 3K5 EN 60730

GND

B A

0V Common

ST1 (RS)

Remote Sensor*

ST2 (FS)

LOAD L

Floor Sensor*

RS-485 Modbus

* Depending on model

SST THERMOSTAT

220 VAC

LOAD ≤ 16A

SwL

e.g

Zone Valves Electric Load Boiler

24VN

B A

0V Common

ST1

Remote Sensor*

ST2

LOAD L

Floor Sensor*

RS-485 Modbus

* Depending on model

SST THERMOSTAT

220 VAC

LOAD ≤ 16A

SwL

e.g

Zone Valves Electric Load Boiler

24VL

24VN

24VAC / 24 VDC (+) 0VAC (-) / 24 VDC (-)

SyxthSense Ltd

PS TH6.90 - 3/5

Online store: www.syxthsense.com

Enquiries: T: 0844 840 3100 F: 0844 840 3200

Wiring Details (230VAC Ver sion s)

WARNING: The electrical wiring is to be carried out by qualified electricians and is required to comply with the local wiring and electrical regulations.

Wiring Details (24VAC Ver sion s)

The electrical wiring is to be carried out by qualified electricians and is required to comply wit

h the local wiring and electrical regulations.

Advanced Parameter Settin

Advanced parameter settings are used to re-configure the SST Thermostat operation. Exact settings used depend on the model.

To enter the configuration mode, switch the thermostas OFF (from OFF button). Then press the HOLD ("H

") button conitnuously up to 10 seconds to display the first of the configuration paratemers. To

adjust the setting press UP or DOWN button until the required setting is displayed.

To advance to the next parameter press HOLD (

"H") button again. Continue until all required parameters have been set. At any time the configuration can be exited by pressing the OFF button, and the normal operation resumes.

WARNING: Use care when changing the advanced configuration parametes as these affect the op

eration of the thermostat.

Parameter Parameter Description Available Settings Default

1 Thermostat Operation when power is

Applied

0 - Thermostat OFF when power is applied 1 - Thermostat ON when power is applied 2 - Retain last status when power is applied

2 Keypad Lock Status 0 - Function is disabled

1 - Temperature adjustment available only 2 - ON/OFF button workable only 3 - All buttons locked

3 Sensor Selection 0 - External temperature sensor

1 - Internal temperature sensor 2 - Internal sensor is used for normal control. The remote sensor connections (RS and 0V) are used as a volt free contact to override the SST Mode of control. Open Contact = OFF, Closed Contact = ON (for more information see external override section)

4 Unit Selection 0 - Celcius display enabled

1 - Fahrenheit display enabled (when changed the calibration and all switching temperature settings return to default values)

SyxthSense Ltd

PS TH6.90 - 4/5

Online store: www.syxthsense.com

Enquiries: T: 0844 840 3100 F: 0844 840 3200

External On/Off Override (e.g. telephone interface)

If an external sensor is not in use an advanced setting can be activated to override the SST thermostat remotely on/off. This can be used, for example, with a telephone or mobile text message interface for remote heating switching.

GND

B A

LOAD L

SST THERMOSTAT

Remote Override Switch e.g telephone interface or GSM interface

Contact Open

= Thermostat OFF

Contact Closed

= Thermostat ON

(SyxthSense part nos

ITPF-221 and ITPR-321).

To activate this function configure the Advanced Paramet

er No. 3 to a

setting 2.

If the unit is remotely overridden OF

F, the unit can be locally overridden ON by pressing OFF button. Note: The thermostat needs to detect close to open transition to switch again off remotely.

5 Temperature Sensor Reading Adjust When viewing parameter 5 on the SST, the current

room temperature is shown. The user may then adjust this reading by using UP/DOWN keys to match the user preference (0.5°C steps). The maximu effect on the sensor is +/-10°C.

Example: SST Reading = 21°C, Handheld Thermometer Reading 23.5°C. Parameter 5 must be accessed and UP arrow keyed until the display shows 23.5°C. Press the ON key to store/show the new reading. The SST will display 23.5°C as a the temperature in the room has not changed during the setup.

NOTE: Changes to the parameter 5 will be applied to all sensor inputs on the SST being adjusted.

N/A

6 Lowest Setpoint Allowed 5..95

(The value of the lowest setpoint that a user can program into the SST. Any setpoint attempted to be lower than this setting willbe returned to this value.)

7 Highest Setpoint Allowed 5..95

(The value of the highest setpoint that a user can program into the SST. Any setpoint attempted to be higher than this setting willbe returned to this value)

8 Temperature Control Hysteresis 1, 2 or 3 Degrees 1

9 Low Temperature Protection 0 - Disabled

1 - Enabled (when thermostat is turned off)

10 Low Temperature Protection Ranges Celcius: 5..17°C

Fahrenheit: 41..63°F

11 Network Address (Modbus Slave) 1..32 1

12 Sleep Mode Not Applicable 1

13 Floor Sensor Limit Temperature Adjustable between 5..95°. If adjusted above 95°, the

LCD displays "--" and the floor temperature limit will be disabled

14 12/24 Hour Time Mode Not Applicable 0

15 Four Switching Period Default Settings Not Applicable 07:00 20/68

09:00 16/61 16:00 20/68 23:00 16/61

Parameter Parameter Description Available Settings Default

SyxthSense Ltd

PS TH6.90 - 5/5

Online store: www.syxthsense.com

Enquiries: T: 0844 840 3100 F: 0844 840 3200

Dimensions Please find the below diagrams fro the thermostat dimensions. The dimensions are in millimetres. The

mounting hole center points are 60 mm apart.

NOTE: A 35mm

deep wall box is recommended.

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.

39.5

Networking A maximum of 32 SST devices can be connected onto a single Modbus network. For more about

available Modbus communication parameters please refer to the SST Modbus Communication

Manual.

Please observe the following networking wiring precautions:-

• Max. Cable Length 1000 meters.

• LAN termination jumpers must be fitted to each device at the end of network

• Use Belden 8762 cable. Same for remote sensors.

GND

B A

LOAD L

SST THERMOSTAT

GND

B A

LOAD L

SST THERMOSTAT

GND

B A

LOAD L

SST THERMOSTAT

GND

B A

MODBUS MASTER e.g. WebBiter

A = RS485 +ve B = RS485 -ve GND = Common 0V = End of Line Termination

All communication cable is Belden 8762 or equivalent.

Protecting shield is connected to Earth

Box Contents The SST thermostat box contains the following:-

• 1 off SST Thermostat shipped with anti-static film over LCD screen

• 1 off Network termination jumper (only use

d when SSTs are connected on a communication net-

work)

• 2 off 25 x M3.5mm fixing screws

SyxthSense SST-A24-302, SST-A24-304, SST-A24-306, SST-A230-302, SST-A230-304 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual