Secure SCS311 User manual

SCS311 / SCS317
Installation Instructions
SCS311 or SCS317 Wireless Programmable
Room Thermostat
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Programmable room thermostats are widely recognised as one
of the best ways in which to control central heating. The SCS311
& SCS317 programmable room thermostats have a large
display and intuitive user interface, making them easy to set up
and use. The SCS311 & SCS317 use a sophisticated time
proportional integral (TPI) algorithm for accurate temperature
control and energy efficiency. The SCS311 & SCS317 operate
within a wider Z-Wave RF network, as a secondary or inclusion
controller under any 3rd party gateway or other primary
controller. When operating in a network that includes a gateway,
it offers full access to the heating program whilst still maintaining
control of the devices within its heating sub system. The SCS311
& SCS317 use the Wake Up Command Class to synchronise
and exchange data with any 3rd party Gateway or Controller.
Installation and connection should only be carried out by a
suitable qualified person and in accordance with the relevant
wiring regulations.
Warning: Isolate mains supply before commencing installation.

TPI Temperature control software
Thermostats using TPI (Time Proportional Integral) control
algorithms will reduce the temperature swing that normally
occurs when using traditional bellows or thermally operated
thermostats. As a consequence, a TPI regulating thermostat will
maintain the comfort level far more efficiently than any
traditional thermostat.
When used with a condensing boiler, the TPI thermostat will help
to save energy as the control algorithm allows the boiler to
operate in condensing mode more consistently compared to
older types of thermostat.
ŸFor Gas boilers set the TPI setting to 6 cycles per hour (default
setting)
ŸFor Oil boilers set the TPI setting to 3 cycles per hour
ŸFor Electric heating set the TPI setting to 12 cycles per hour
To adjust this setting go to the SET UP MENU and select TPI
CYCLES
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Fitting the SCS311 / SCS317 Programmable Room
Thermostat
First install the 2 x AA batteries provided making sure that they
are fitted correctly as indicated by the markings in the battery
compartment on the front of the SCS311 and SCS317.
Once the SCS311 or SCS317 is successfully included / paired
the SCS311 or SCS317 can be installed in its correct location.
Avoid installing the SCS311 / SCS317 against or behind any
large metal surfaces which could interfere with the radio signals.
The SCS311 / SCS317 should be mounted on an internal wall
approximately 1.5 metres from floor level using the wall plate
provided and should be in a position away from draughts, direct
heat and sunlight. Ensure that there will be enough space to
allow easy access to the two retaining screws located at the
base of the wall plate.
1.5m
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Before fixing the wall plate in position check to see that the
thermostat is still able to communicate satisfactorily with the
controller by turning the thermostat temperature up the
controller should provide the appropriate response.
Offer the plate to the wall in the position where the SCS311 /
SCS317 is to be mounted and mark the fixing positions through
the slots in the wall plate. Drill and plug the wall, then secure the
plate into position. The slots in the wall plate will compensate for
any misalignment of the fixings.
Complete installation by swinging the SCS311 / SCS317 into
position by engaging with the lugs at the top of the wall plate
before pushing it carefully home into its plug-in terminal block.
Tighten the 2 captive screws on the underside of the unit.
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Accessing SET UP MENU/ Z-WAVE Menu
To access the SET UP MENU take the following steps.
Press ENTER twice
Press '-' or '+' until
Set Up appears on
the display
Press ENTER
Press '-' or '+' to toggle
between the menu options
detailed below
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Select clock format This allows the display to show the time in
24 hour or AM/PM format
Daylight saving This is the adjustment made in the UK when
the clocks go back or forward in the Autumn
and Spring
Default setting ON
Standby temperature This is the temperature setting used when in
Standby or Holiday mode (Min 5˚C / Max
30˚C)
In cold weather the heating will activate if
the temperature being measured falls below
this temperature setting
Lower temperature limit This sets the lowest temperature setting the
SCS311 or SCS317 will allow to be
programmed
Default setting 5˚C
Menu Options

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Upper temperature limit This sets the highest temperature setting the
SCS311 or SCS317 will allow to be
programmed
Default setting is 30˚C
TPI cycles per hour This setting helps the TPI energy saving
software to operate correctly depending on
the type of heating system you have
Optimum start This calculates the amount of time the
SCS311 or SCS317 may need to switch on
in advance of the next target temperature
setting in order to meet the requirement
Tamper setting This setting allows a 4 digit release code to
be set up to stop unauthorised adjustments
being made in multi occupancy buildings
Set up Z-Wave Sub Menu Description
Include node / receiver Include other devices
onto the network.
Exclude node / receiver Remove devices from
a network.
Send NIF Sends a Node
Information Frame
(NIF) as a broadcast
message.
Learn Used for inclusion or
exclusion by another
controller. This mode
can be used for the
reception of the
primary controller role
following a controller
shift initiated by the
current primary
controller.

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Listen Puts the SCS311 or
SCS317 into listen
mode, for up to 60
seconds.
Associate node Used to manually
associate devices to
control.
Disassociate node Used to manually
disassociate all
associated
switches.
Controller shift Used to offer the
Primary Controller role
to another controller.
Protocol reset Used to reset the Z-
Wave network.
Include / Exclude
When the Include/Exclude function has been selected it will wait
for a request to join the network from another node.
If the installer does not start the Inclusion/Exclusion process of
the other node within 60s, or the SCS311 or SCS317 does not
receive a response within 3 minutes from another node, then a
failed outcome will be indicated.
Note 1: When including a device that supports Thermostat Mode HEAT, the
SCS311 or SCS317 will automatically associate it to Group 2 (switch
association group).
Note 2: If an associated node to SCS311 or SCS317 is excluded from the
network, it will be removed from the Association Group it is stored in.

Learn
When the Learn function has been selected the SCS 311 or
SCS317 will wait to be included to or excluded from another
controller.
If the installer does not start the inclusion/exclusion process of
the other node within 60s, or the SCS311 or SCS317 does not
receive a response within 3 minutes of beginning exclusion with
another node, then a failed outcome will be indicated.
Note 1: any associations will be cleared if the SCS 311 /317 have engaged
in Learn mode with another controller regardless or a successful or failed
outcome.
Note 2: the SCS 311 /317 does not support control group replication.
Listen
Puts the SCS311 or SCS317 into a listening state enabling it to
receive messages outside of the Wake Up Notification Period.
This state lasts for at least 60 seconds or until the user cancels it
by pressing BACK.
Associate/Disassociate
This function allows the installer to manually associate
/disassociate devices to Association Group 2. When associated
the node will be under direct control of the SCS311 or SCS317
heating algorithms. On selecting associate, the installer has 60s
to initiate a NIF from desired node. In the event of the 60s period
elapsing a failed message will be shown on the display.
8

Controller Shift
This allows the installer to manually relinquish the primary
controller role of the SCS311 or SCS317. When selecting
Controller Shift the installer have 60s to initiate Learn Mode on
the other controller for the controller shift to take place. (The
SCS311 and SCS317 will timer out after 3min if a acceptable
response is not received)
If the operation is successful the SCS311 or SCS317 will
become a secondary or inclusion controller depending on the
new primary controller's capabilities.
Protocol Reset
Provides a full protocol reset and a restoration of all network
parameters to their defaults, and generates a new random home
ID to operate on. A network reset does not change the heating
schedules stored on the device.
A success or failure message will be shown on the display within
5 seconds.
Network Update Scheme
When the SCS311 or SCS317 is a secondary or inclusion
controller with a SUC or SIS present in the system, it will request
network updates every four hours, to ensure that it has an up to
date version of the network table
9

Installer Settings
There are a number of 'Installer Settings' that should be set on
installation.
These can be found under the 'SET UP MENU' on page 13 of the
user instructions.
The TPI Cycles setting and Optimum Start settings should be
carefully set on installation as this will affect system performance.
Clock Format AM/PM or 24 Hour clock display - Default
setting AM/PM
Daylight saving On or Off - Default setting ON
Standby temperature Frost protection setting – Default setting 5°C
Upper and Lower Default settings 30°C and 5°C
Temperature limits
TPI Cycles This setting will change according to the
type of boiler being used - Default setting 6
For Gas boiler this setting should be 6
cycles per hour
For Oil boilers this setting should be 3
cycles per hour
For Electric panel heaters this should be 12
cycles per hour
Optimum Start On or Off – Default setting Off
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Z-Wave Device Classes Implemented Device Class
Generic GENERIC_TYPE_THERMOSTAT
Specific SPECIFIC_TYPE_NOT_USED
Basic BASIC_TYPE_CONTROLLER
Command Classes
Supported
Manufacturer specific Secure Controls (UK) Ltd Manufacturer ID
Manufacturer ID = 0x0059
Product Type = 0x0004
Product ID = 0x0001
Version Provides the version number of the
application and the protocol stack used
Wake up (v2) Defines frequency, and to which node, the
unit will send Wake up notification. SCS311
or SCS317 remains awake for 10 seconds
after the last message, or until Wake up
notifications received.
Thermostat set point (v2) Supports HEAT and AWAY HEATING HEAT.
Set, is mapped to the temporary (advance)
override. The sent set point will be applied
to the end of the current heating cycle.
Get, reports the current target temperature.
AWAY HEATING
Sets and reports the temperature for both
STANDBY and HOLIDAY modes.
Multilevel sensor Reports ambient temperature in ˚C or ˚F to
1 decimal place, and sends an unsolicited
message to gateway node in Association
Group 1 when temperature change by ∆T
Description
11

Schedule SET commands will change or update the
program held within the SCS311 or SCS317.
Parameter Name Value Comments
Number of IDs
supported 42/6 SCS311 - 6
schedules, 1 day
SCS317 - 42
schedules, 7 days
Start Time 8/2 SCS311 - Start
hour and minute
supported
SCS317 -
Weekdays start
time supported
Number of CC
supported 1
Supported CC 1 67 Thermostat set
point v2
Supported CC 1
support 1 Only set command
accepted
Override support /
Supported override
types 130 Overrides
supported
Advance and run
forever supported
The Get command will provide number of
scheduled which can be configured / set.
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Binary switch Set command
- 0x00, Cancel holiday mode
- 0xFF, Set holiday mode, starting
from today and lasts for 7 days, previously
stored holiday dates are over written
Get command
- 0xFF, Holiday mode is on/enabled
- 0x00, Holiday mode is off
Precise dates can only be set locally on
SCS311 or SCS317
Thermostat operating
state
When SCS311 or SCS317 sends a control
message to the switch(es) in Association
Group 2 it will send and unsolicited
thermostat operating state report to the
gateway node in Association Group 1
Battery level Reports battery level as a %, levels below
20% will report a low battery warning to
gateway nodes in Association Group 1
Association Two association groups are supported
Group 1 - This node receives unsolicited
message from the following events
- Thermostat set point
- Thermostat operating state
- Schedule
- Multilevel sensor
- Battery
- Binary switch
Only one node can be associated to
Association Group 1.
Reports either call for heat (active) or idle
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Group 2 - Central heating node controlled
by the SCS311 or SCS317 will determine
how best to communicate with the device. If
thermostat mode Heat Mode is supported
the control message will be sent as
Thermostat Set HEAT and Thermostat
mode set Off, otherwise the device will be
controlled by Basic set On and Off
commands.
Up to four nodes can be associated to
Association Group 2.
Configuration Parameters (sequential order)
Basic The Basic command class is mapped to the
thermostat set point, with HEAT as the
parameter.
Following parameters are used for SET:
0x00 – Enables energy saving mode,
temporarily overrides the set temperature
with the standby temperature.
0xFF – Set comfort mode, temporarily
regulates the room temperature to 21
degrees.
GET command provides the following
responses:
0x00 – Energy saving mode enabled
0xFF – Energy saving mode disabled
Basic SET commands will be sent to control
devices in Association Group 2 if they do
not support the appropriate modes in the
thermostat mode command class.
No
1
2
3
4
Size
1
1
1
1
Units
˚C / ˚F
˚C / ˚F
˚C / ˚F
˚C / ˚F
Resolution
1
1
1
1(0.1)
Min
Value
˚C=0
-127
5
5
1(0.1)
Max
Value
˚F=128
-255
30
30
50 (5)
Default
Value
5(0.5)
5
5
0
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Temperature unit selection
Lower temperature limit
Upper temperature limit
Delta T (1˚C = 10)

Command Classes
Controlled
Time TIME and DATE GET request the
information from node associated to
Association Group 1 (the gateway node). If
not available the SCS311 or SCS317 will
rely on time entered locally.
Time and Date will be requested from the
gateway shortly after association or power
up and then once per day. Unsolicited TIME
and DATE REPORTS can be sent to the
SCS311 or SCS317 at any time.
Thermostat mode Supports thermostat mode SET commands
(OFF or HEAT) to devices in Association
Group 2
Application status When SCS311 or SCS317 cannot action or
respond to messages received, an
Application Rejected Request will be sent
as a response.
Basic Basic SET commands will be sent to control
devices in Association Group 2 if they do
not support the appropriate modes in the
thermostat mode command class.
Note 1: Unless otherwise stated all command classes are version 1
Note 2: “The Delta T” is the change between temperature readings
required for the SCS311 or SCS317 to send temperature reports to the
Gateway node in Association Group 1. Setting this to its lowest value,
0.1˚C, will provide more frequent updates but at higher cost to the
battery.
Description
15

Resetting the SCS311 / SCS317
Electronic equipment can in some circumstances be affected by
electrical interference.
If the display becomes frozen or scrambled simply press both
the BACK and ENTER button simultaneously.
Using this procedure will restore the SCS311 / SCS317 to the
original factory settings, the Time and date will remain correct.
BACK ENTER
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Specification – SCS311 / SCS317
Power Supply 2 x AA Batteries
Contact type Micro-disconnection
Wiring configuration Voltage free c/o contacts (SPDT)
Temperature differential 0.5°C
Temperature accuracy +/- 0.5°C to 21°C
Standards EN 60730-2-9
Dimensions (WxHxD) 120mm x 100mm x 26.5mm
Weight 0.3kg (approx)
Enclosure Flame retardant thermoplastic
Ingress protection IP30
Pollution degree Degree 2
Insulation class Class II (Double Insulated)
Temperature range 0°C to 40°C
Transmitter Frequency 868 MHZ
Receiver Category Category 3
Power Class Class B
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Part Number P85161 Issue 1
Cewe Instrument AB
Box 1006
611 29 Nykoping
Tel: [phone]
Email: [e-mail]
Web Site: www.securetogether.eu
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