Salus ST320 User manual
S-Series Digital Thermostat
Instruction Manual
Model No ST320
2
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ST320 INSTRUCTION MANUAL2
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PRODUCT COMPLIANCE
This product complies with the essential requirements of the following EC Directives:
•Electro-Magnetic Compatibility directive EMC2004/108/EC
•Low Voltage Directive 2006/95/EEC
•EC Marking directive 93/68/EEC
SAFETY INFORMATION
These instructions are applicable to the Salus Controls model stated on the front cover of this manual
only, and must not be used with any other make or model.
These instructions are intended to apply in the United Kingdom only, and should be followed along
with any other statutory obligations - if you are in any doubt, please contact the Salus Controls
technical helpline.
This accessory must be fitted by a Competent person, and installation must comply with the
guidance provided in the current editions of BS7671 (IEE Wiring Regulations) and Part ‘P’ of the
Building Regulations. Failure to comply with the requirements of these publications could lead to
prosecution.
Always isolate the AC Mains supply before opening or removing the unit from the wall or wall box.
When fitting batteries don’t mix new and old batteries together. Do not use rechargable batteries.
Please leave these instructions with the end user where they should be kept in a safe place for future
reference.
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INTRODUCTION
A thermostat is a device that is used to switch the heating system in your home on and off as needed.
It works by sensing the air temperature and switching on the heating when the air temperature falls
below the thermostat setting, and switching it off once the set temperature has been reached.
The ST320 from Salus Controls is a stylish and
accurate electronic thermostat with a large, easy to
read LCD display. The thermostat has been
specifically designed to be used Volt Free.
The use of the revolutionary Touch Ring technology makes for simple usage, and is coupled with a
unique, smart design. The LCD display will show the current room temperature and the ‘one touch’
operation makes the ST320 easy to operate.
FEATURES
• Touch Ring Technology
• Large LCD with white backlight
• Stylish Casing
• Volt Free Contacts
• Battery Powered with Replacement Indicator
• Frost Protection
• Burner on symbol
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INSTALLATION
Please read the important safety information at the start of this manual before you start to install the
device.
The ideal position to locate the ST320 thermostat is about 1.5m above floor level. It should be
mounted in a location where the thermostat is accessible, reasonably lit and free from extremes of
temperature and draughts. Do not mount the thermostat on an outside wall, above a radiator or in
a location where it may be subjected to direct sunlight.
There are only two electrical connections required to the
ST320, and these connections should be made to the
terminal block inside the thermostat. No Earth
connection is required for the correct and safe operation
of the ST320, but a parking terminal is provided to
connect an Earth wire if one is present. These connections
are shown in the drawing and table below:
Terminal Function
L (COM) Live
SL (NO) Switched Live (output)
Earth Earth Parking (No electrical connection)
NOTE: All electrical installation work should be carried out by a suitably qualified Electrician or other
competent person.
If you are not sure how to install this thermostat consult either with a qualified electrician, heating
engineer or your boiler / heating system supplier for advice on how to continue.
Wiring Diagram
E
H
T
SL
L
System= Heat Control Mode = On/Off
LN
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USER INTERFACE AND CONTROLS
The status and operation of the ST320 is clearly
shown on the large backlit Liquid Crystal Display (LCD).
The display consists of a combination of symbols and alphanumeric displays. The top row is a set of
status symbols, the centre row is used to indicate temperature (in Celsius), and the bottom row is
an alphanumeric display for menu and status messages.
The status symbol functions are:
Indicator Description Function
RF Signal indicator
(Not used with ST320) Indicates the unit is transmitting a wireless signal
Touch Lock indicator Indicates touch lock is activated
Heat Mode indicator Indicates heating output is turned on.
Frost Mode indicator Indicates frost setting is turned on
Battery Status Indicates battery is low
There are few user controls for the ST320, making the thermostat very easy to operate. The controls
are a Touch Ring (which surrounds the user display), two touch sensitive buttons, a reset button
and a slide operated switch mounted on the side of the thermostat.
These controls are shown below, along with a description of each of their functions.
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USER CONTROL FUNCTION SUMMARY:
Key / Operation Functions
Touch Ring (move clockwise) Increases the set temperature and scrolls down the
menu selection
Touch Ring (move anti- clockwise) Decreases the set temperature and scrolls up
the menu selection
OK Key Enters Menu or confirms a menu selection
Arrow (Back) Key Single touch- sets the unit back 1 step.
Hold for 2 seconds sets unit back to normal mode
Reset Button Resets the thermostat to default (original factory) settings
Slide Switch Activates and deactivates the key lock function
(prevents accidental changes)
Touch Ring
Slide Switch
OK KeyReset Button Arrow (Back) Key
7ST320 INSTRUCTION MANUAL
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OPERATION
The ST320 is configured and adjusted by the use of
an innovative and stylish Touch Ring, and two touch
sensitive buttons. The Touch Ring surrounds the
thermostat display, and is operated very easily by
moving your finger around the ring.
The backlit Liquid Crystal Display (LCD) gives a highly visible, easily readable indication of the
thermostat status.
REVIEWING THE SET TEMPERATURE
If you press the Touch Ring anywhere except the OK and Arrow keys when the
ST320 is in NORMAL mode (NORMAL mode is when the thermostat is
displaying the room temperature), you can check the set temperature setting.
This will display the current set temperature. The set temperature will be displayed for two seconds
before the LCD changes to display the room temperature again.
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If the ST320 is operating in Frost Mode the LCD will display both the room temperature and also the
Frost Mode indicator . To turn off FROST mode, select the FROST menu and then by using the Touch
Ring scroll to the OFF setting. OFF will then be displayed on the LCD.
After pressing the Touch Ring, the LCD will display the preset Frost Mode
temperature of 5 ºC (this temperature is factory set and cannot be adjusted).
Pressing the OK or Arrow keys will return the ST320 to NORMAL mode.
CHANGING THE SET TEMPERATURE
When the ST320 is in NORMAL mode, press the Touch Ring anywhere
except the OK and Arrow keys (as described in the previous section), to
enter the Review Set Temperature mode. The currently set temperature
will be displayed on the LCD and will flash.
When the set temperature is flashing, press the Touch Ring and move your finger clockwise to
increase the set temperature, or anti-clockwise to decrease the set temperature. Press OK at any time
to confirm the selection. Note that the set temperature display will not flash while being adjusted –
this is normal and the display will start to flash again approximately 0.5 seconds after the Touch
Ring is released.
The ST320 will go back to NORMAL mode without changing the set temperature after 10 seconds of
inactivity, or after pressing the Arrow key.
If the ST320 is in FROST mode, the set temperature cannot be adjusted. Turn off FROST mode
as described below to allow the set temperature to be changed.
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ACCESSING THE MENUS
The Arrow key is not active when the ST320 is in NORMAL mode. To access the
Menu screens, press the OK key twice. The first menu displayed is the FROST
menu:
Use the Touch Ring to scroll through
the Menus, and press the OK key to
select the menu you want to enter:
Pressing the Arrow key will return the ST320 to NORMAL mode. The thermostat will also return to
NORMAL mode after 10 seconds if no Key is pressed or if no movement is detected on the Touch
Ring.
FROST MENU
Entering the FROST menu allows you to turn the frost protection mode of the ST320 on or off. The
FROST mode temperature is preset at 5 ºC; this temperature is factory set and cannot be adjusted.
The FROST mode indicator will be displayed in all the FROST menu
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