Salus ST620RF User manual

Instruction Manual
S-Series Digital Thermostat
Model No ST620RF
2
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 1

ST620RF INSTRUCTION MANUAL2
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 2

PRODUCT COMPLIANCE
This product complies with the essential requirements of the following EC Directives:
•Electro-Magnetic Compatibility Directive 2004/108/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.
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 receiver from the wall or wall box.
When fitting batteries don’t mix old and new 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.
3ST620RF INSTRUCTION MANUAL
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 3

INTRODUCTION
A programmable thermostat is a device that combines the functions of both a room thermostat and heating
controller into a single unit. The programmable thermostat is used to switch the heating system by means of time
and temperature change. This unit is not like a standard programmer. It works by controlling the temperature
according to a series of programmed settings that take effect at different times of the day.
The ST620RF from Salus Controls is a stylish and accurate 5/2 or 7 day
programmable electronic thermostat with a large, easy to read Liquid Crystal
Display (LCD). This programmable thermostat has been specifically designed to
be used Volt Free. Unlike ordinary single unit design programmable thermostats,
this is a new type of unit that separates the operational functions into two units.
The Receiver is used for wiring connections and heat on/off control. The Control
Centre provides the user interface and temperature sensing / control. The two
units are linked together by a Radio Frequency (RF) signal.
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 ST620RF easy to operate.
ST620RF INSTRUCTION MANUAL4
FEATURES
•Touch Ring Technology
•Large LCD with White Backlight
•Stylish Casing
•Volt Free Contacts
•Intelligent Communication Technology
•Battery Powered with Replacement Indicator
•Frost Protection
•Burner on Symbol
•Radio Controlled Clock (RCC)
•Manual Time / Date Setting Option
•Holiday Function
•Service Function
•Six Time / Temperature Settings / day
•Secure RF Transmission
(one million unique RF address codes)
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 4

INSTALLATION
Please read the important safety information at the start of this manual before you begin to install the device.
The ideal position to locate the ST620RF programmable 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.
The ST620RF should be mounted in a location where it will not come into contact with moisture or condensation,
as this can affect the Touch Ring operation.
To ensure trouble free reception for both the Radio Controlled Clock (RCC) and the Radio Frequency (RF) signal,
always ensure that the programmable thermostat is mounted away from any possible sources of interference (such
as radios, TV sets, computers, etc.), and is not mounted on or in close proximity to large metal objects. Installing
the ST620RF in enclosed areas such as cellars and basements is not recommended.
5ST620RF INSTRUCTION MANUAL
RECEIVER BOILER
MAINS
FEED
N
L
Thermostat loop (Remove link)
Live Feed
LSL LNE
COM N/O L N
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 5

CONNECTING THE ST620RF RECEIVER
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 digital thermostat consult either with a qualified electrician, heating
engineer or your boiler / heating system supplier for advice on how to continue.
The ST620RF Receiver should be mounted in a suitable location that is both accessible for the connection of mains
and control wiring, and allows good reception of the RF signal. The Receiver needs a 230V AC mains supply to
operate, and this should be fused appropriately (16A max.).
The Receiver should be mounted in a location where it will not come into contact with water, moisture or
condensation. There are few electrical connections required to the ST620RF, and these connections should be made
to the terminal block inside the Receiver. No Earth connection is required for the correct and safe operation of the
ST620RF, but a parking terminal is provided to connect an Earth wire if one is present.
These electrical connections are shown in the table below:
ST620RF INSTRUCTION MANUAL6
Terminal Function
COM Common Contact (volt free input)
NO Normally Open Contact (volt free output)
Earth Parking (No electrical connection)
L Incoming Mains - Live
N Incoming Mains - Neutral
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 6

7ST620RF INSTRUCTION MANUAL
INSTALLING AND REPLACING BATTERIES
Installing or replacing the ST620RF Control Centre batteries is a
straightforward operation, but does require you to open the case of
the programmable thermostat.
To open the ST620RF case, undo the securing screw on the bottom of
the case (just to the right of the hole for the Reset Button):
After undoing the screw pull it forward until the screw stops
moving, then carefully separate the two halves of the case by gently
pulling in an upwards direction. Once the case has been separated,
the batteries should be visible:
Ensure that the batteries are inserted correctly, paying careful
attention to the polarity markings on the battery and next to the
battery holders. After inserting the batteries, refit the ST620RF case
and retighten the securing screw.
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 7

PAIRING THE ST620RF RECEIVER AND CONTROL CENTRE
It is important to correctly pair both the Receiver and Control Centre to ensure that the RF address codes are matched
and that reliable communication is established between the units. Please follow the instructions below to ensure that the
units are configured correctly.
On the Receiver:
Press and hold the SYNC button to allow the Receiver to enter the learning mode. The Red SYNC LED will turn on to
indicate it is ready to receive a signal and pair with another unit.
While the signal is being received, the SYNC LED will turn on until the pairing has completed successfully; the SYNC LED
will then turn off and the Green Power LED will turn on again. The Control Centre will continue to transmit a pairing signal
for 10 minutes before returning to NORMAL mode.
On the Control Centre:
The Arrow key is not active when the ST620RF is in NORMAL mode. To access the Menu screens,
press the OK key twice. The first menu displayed is the PROGRAMME menu:
ST620RF INSTRUCTION MANUAL8
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 8

Use the Touch Ring to scroll through the Menus, and press the OK key to select the menu you want to use:
You can scroll through the menus in either direction (forwards or backwards) depending on the direction you move
your finger around the Touch Ring. The menus are displayed in the order shown in the picture above.
Pressing the Arrow key will return the ST620RF 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.
9ST620RF INSTRUCTION MANUAL
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 9

After selecting the PAIR Menu, PAIR and the RF icon are displayed.
Press the OK key to start sending the RF address code to the Receiver.
The ST620RF Control Centre display will change to show a rundown timer:
The unit counts down for a period of 10 minutes, with the RF Signal indicator flashing while the signal is being
transmitted. The RF address code will be generated randomly and the Control Centre will transmit the signal every
second for the full 10 minutes until:
• The Arrow key is pressed to return to the previous display
• The OK key is pressed to return to NORMAL mode
• The 10 minute timer runs out
Note that the Receiver must be already in learning mode BEFORE attempting to access the PAIR menu on the Control
Centre. If the Red SYNC LED has not turned off after 10 minutes, repeat the whole pairing process.
Pressing the Reset button on the Control Centre and the Receiver will clear the RF address code and generate a new
default code which will be saved into the internal memory of the unit; there is no need to re-pair the Receiver and
Control Centre. This is a quick and easy way to directly link the units in many applications.
ST620RF INSTRUCTION MANUAL10
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 10

Replacing the Control Centre batteries will not affect the RF code setting. Pressing and holding the SYNC button on
the Receiver will however clear the RF address code saved into the internal memory, and switch the Receiver into
learning mode, as previously described.
TESTING THE RF TRANSMISSION
It is important to site both the Receiver and Control Centre in locations where the RF signal cannot be interrupted.
The receiving range between Control Centre and Receiver is 100 metres in open air, however many factors can
affect the RF transmission and shorten the operating distance, e.g. shielding by thick walls, foil back plasterboard,
metal objects such as filing cabinets, general RF interference, and so on.
The operating range is generally around 30 metres, which is large enough for most household applications, but it
is advisable to test the RF transmission from the intended Control Centre location to the Receiver location before
fixing the Control Centre to the wall. If you are unable to get a stable RF connection between the Receiver and
Control Centre, check that the Receiver is both switched on and has a mains supply (green LED lit).
The RF communication is one way, from the Control Centre to the Receiver – the Receiver does not send any signal
back to the Control Centre. The RF signal indicator only flashes once when a signal is being transmitted. Once
the Receiver has established communication successfully, the green Power LED will flash for 4 seconds to indicate
the process has completed correctly.
The Control Centre will transmit only when there is a need to control the heating system.
11ST620RF INSTRUCTION MANUAL
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 11

RECEIVER LED INDICATORS
The LED indicators on the ST620RF Receiver are designed to give a clear and easily understood indication
of the current state of the system.
The various LED signal combinations and descriptions of what they indicate are shown in the table
below:
LED State Indication
Blue On Receiver is in Manual mode and system is calling for heat.
Blue Flashing Receiver is in Automatic mode and system is calling for heat.
once per
second
Blue Off Receiver is in Automatic mode and system is NOT calling for heat
Green On Power is on
Green Flashing Receiver has received correct RF address and Command
for 4 signal when in Failsafe mode
seconds
Red On and Receiver is either receiving a new RF address code in SYNC mode,
flashing or has failed to store the new RF address code when in SYNC mode
Yellow On Receiver is in Failsafe mode after no RF signal received for over 1 hour
ST620RF INSTRUCTION MANUAL12
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 12

AFTER INSTALLATION
After completing installation and powering up the ST620RF for the first time the programmable
thermostat will behave in the following way:
All the indicators on the display and the backlight will be turned on.
After two seconds, the ST620RF will then operate in NORMAL mode and display
the current room temperature, with the RCC indicator flashing.
All programmable thermostat settings will be returned to default values.
If the Reset Button is pressed, the ST620RF will behave in the same way as
described above, except that any previously saved user settings stored in the
internal memory will be deleted and overwritten with the default settings.
13ST620RF INSTRUCTION MANUAL
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 13

USER INTERFACE AND CONTROLS
The status and operation of the ST620RF is clearly shown on the
large backlit Liquid Crystal Display (LCD).
This display allows the user to see at a glance the current status
of the heating system, as well as a clear indication of the current
room temperature.
The display consists of a combination of symbols and
alphanumeric displays. The top row is a time and day of the
week indicator, the centre row is used to indicate temperature
(in Celsius), and the bottom row is an alphanumeric display for
menu and status messages. The symbols around the outside of
the display are status indicators – an explanation of what these
indicators mean is shown on the next page.
ST620RF INSTRUCTION MANUAL14
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 14

Indicator Description Function
Clock Display Displays the day and time
Temperature indicator Displays set or measured temperature
Alphanumeric Display Displays menu and other status messages
Programme Number Displays the number of the
indicator active (selected) programme
Heat Mode indicator Indicates heating output is turned on.
Holiday indicator Indicates Holiday operation mode is selected
Battery Status Indicates battery is low
RF Signal indicator Indicates the unit is transmitting
a wireless signal
RCC indicator Indicates the status of the Radio Controlled Clock
Service indicator Indicates Service function is active
Frost Mode indicator Indicates frost setting is turned on
Touch Lock indicator Indicates touch lock is activated
15ST620RF INSTRUCTION MANUAL
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 15

There are few user controls for the ST620RF, making the
programmable 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. The ST620RF Receiver has
only two slide switches, a Sync button and a Reset button.
These controls are shown below, along with a description of each
of their functions.
USER CONTROL FUNCTION SUMMARY:
Key / Operation Functions
Touch Ring (move clockwise) Increases the selected setting and scrolls
down the menu selection
Touch Ring (move anti- clockwise) Decreases the selected setting and
scrolls up the menu selection
OK Key Enters Menu or confirms a menu selection
Arrow (Back) Key Single touch – sets the unit back one step.
Hold for two seconds sets the unit back to NORMAL mode
Reset Button Resets the programmable thermostat to default (original factory)
settings except Service setting (when Service is on)
Slide Switch Activates and deactivates the key lock function
(prevents accidental changes)
ST620RF INSTRUCTION MANUAL16
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 16

The status of the ST620RF Receiver is indicated by the use of two
bi-colour Light Emitting Diodes (LEDs). The status indicators are:
Indicator Colour Operating Function
Blue / Yellow Blue Heat call mode
Yellow Failsafe mode
Green / Red Green Power on
Red SYNC mode
User Control Function Summary – ST620RF Receiver
Key/Operation Functions
Auto Sets Receiver to Automatic mode (default setting)
Manual Sets Receiver to Manual mode
On Turns Relay output ON (default setting)
Cycle
Switches Receiver output on and off in a 15 minute cycle (4 minutes on, 11 minutes off)
Off Turns Relay output OFF
SYNC Button Enables RF signal synchronisation with ST620RF Control Centre
Reset Button Resets the Receiver to default (original factory) settings
17ST620RF INSTRUCTION MANUAL
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 17

OPERATION
The ST620RF is configured and adjusted by the use of an innovative
and stylish Touch Ring, and two touch sensitive buttons. The Touch
Ring surrounds the programmable 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 programmable thermostat status.
ACCESSING THE MENUS
The Arrow key is not active when the ST620RF is in NORMAL mode. To
access the Menu screens, press the OK key twice. The first menu displayed
is the PROGRAMME menu:
ST620RF INSTRUCTION MANUAL18
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 18

Use the Touch Ring to scroll through the Menus, and press the OK key to select the menu you want to use:
You can scroll through the menus in either direction (forwards or backwards) depending on the direction you move
your finger around the Touch Ring. The menus are displayed in the order shown in the picture above. Pressing the
Arrow key will return the ST620RF to NORMAL mode. The programmable 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.
19ST620RF INSTRUCTION MANUAL
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 19

PROGRAMMING THE ST620RF
The ST620RF offers great versatility with its programming
options, allowing the user to programme the ST620RF to
operate on an individual, 5/2 or 7 day control cycle. The
programmable thermostat has a default set of Programmes
that have been designed to meet the needs of most users.
If these default programmes are not suitable for your
particular situation, reprogramming the ST620RF with your
own settings is a very straightforward operation.
To start programming the ST620RF, press the OK key when
in NORMAL mode. This will by default select the
PROGRAMME menu - press the OK key once more to start
the programming process.
Initially, the Weekdays will be selected and flashing – you
can scroll through all the various options for day selection
(Weekdays, Weekend, 7 days, or individual days) by using
the Touch Ring. As usual, pressing the OK key will select the
desired option.
ST620RF INSTRUCTION MANUAL20
ST620RF Manual Version 005 CMYK:Layout 1 1/9/10 11:56 Page 20