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

2

(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

Copyright © 2013 SyxthSense Ltd. All rights reserved - 02/2013

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

H

20

5

INSIDE

SET
TEMP

20

°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