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EN.33.C.174.1503
Installation instructions | LK Timer Thermostat SR 310
Design
The timer thermostat is designed for temperature
regulation of e.g. rooms in residential properties
and commercial premises etc. The timer thermostat is used in order to achieve different temperature levels during a 24-hour period. These might
be a normal comfort temperature by day and a
lower temperature at night, for instance.
1. Rating label
2. Battery location
3. Minutes, setting
4. Hours, setting
5. Weekday, setting
6. Read and change time program
7. Holiday symbol
8. Display basic program P1 ... P6 active
9. Display of current time (hour)
10. Display of current weekday
11. Display of current time (minutes)
12. Display change, manual temperature
13. Display automatic operation
14. Display heating is ON
15. Settings buttons
16. Temperature display
17. Economy button ECO
18. Program selector
19. Compartment for electrical connection
20. Setting of wall temperature equalisation,
regulation accuracy, cycle times
21. Activation of holiday program
Safety
When tting or removing the timer thermostat,
make sure the electrical supply is switched off.
The product must not be installed on a surface
that is electrically conductive.
The connection and installation of electrical
products must only be performed by a qualied
electrician. You must comply with national legislation as well as local safety regulations and instructions
LK Timer Thermostat SR 310
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EN.33.C.174.1503
Installation instructions | LK Timer Thermostat SR 310
Installation
• Fit the back cover to a wall approximately
1.5 m above the oor, preferably on an inner
wall. Make sure air can circulate unhindered
around the thermostat.
• Make the electrical connection as shown in
the circuit diagram.
Battery replacement
Fitting/replacing batteries
Open the front cover of the timer thermostat.
Note the polarity and insert new batteries of the
same type (alkaline 1.5 V AA LR6).
Behaviour in the event of discharged batteries
The display ashes for a few days. The timer will
then stop. The relay contact will close and the
heating will then be constantly on.
Recommendation
Check the batteries every now and then. Leaking
batteries may damage the product.
Starting the thermostat for the
first time
Remove the battery securing device consisting of
a strip of plastic tape.
• Press and hold the RES button for about a
second.
Setting the day of the week:
• Press and hold button d.
• Set the day of the week using the buttons.
Set the current time:
• Press and hold button h.
• Set the hours using .
• Press and hold button m.
• Set the minutes using the buttons.
• Release the buttons.
Program settings
• Press the Prog button repeatedly.
The six different programs will be displayed in
succession.
Select a program
• Press the Prog button repeatedly as needed
until the desired basic program P1– P6 is
displayed.
Note: If programs P1 and P2 are combined with
programs P5 and P6, time overlap may occur.
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EN.33.C.174.1503
Installation instructions | LK Timer Thermostat SR 310
If switchover times P1/P2 and P5/P6 are not
changed, the daily times for P1/P2 will also apply
on Saturdays and Sundays, see the table above.
Activation of programs
• Press the SET button until e.g. P1 is permanently displayed.
Deactivation of programs
• Press the SET button until e.g. P1 ashes.
• Save by pressing the Prog button.
• Press the Prog button until SET appears in
the timer display.
• Then press the SET button to store the program.
Change a program
• Press the Prog button repeatedly until the
desired program P1– P6 is displayed.
Change days
• To set the time period press and hold button
d.
• Change days of the week using the
buttons (see table).
Change time for heat reduction
• To set the time period press and hold button
h or m.
• Select the desired heating time using the
buttons.
Change the temperature
• Change the temperature using the
buttons.
• Save with the Prog button.
• Press the Prog button until SET appears in
the display.
• Then press the SET button to save the pro-
gram.
For your information, you cannot activate more
than 6 programs.
Manual temperature setting in
automatic operation
In automatic operation, a manual temperature
change can be performed temporarily. The setting is active until the next program event P1–P6.
The setting range is between 5 and 39 °C.
Manual change of temperature
• Set the desired temperature using the
buttons.
ECO program
During the period between 1 hour (ECO 1) and 8
hours (ECO 8), a xed temperature of 16 °C can
be selected. The display shows the remaining
ECO period. When the ECO period has come to
an end, the thermostat returns to automatic operation in line with the program.
Setting an ECO program
Press the ECO button repeatedly to set the desired program (ECO 1– ECO 8). E.g. ECO 6 will
give 6 hours of temperature reduction to 16 °C.
Terminate the ECO program
Press and hold the button for approximately two
seconds.
Program selector
Auto = The thermostat operates
based on the selected heating
program.
Manual temperature change is
possible.
Perm 21 °C = The thermostat holds
the temperature constant at 21 °C.
Manual temperature change is not
possible.
Perm Off = The thermostat is
switched off.
Manual temperature change is
not possible.
Perm Frost = Frost protection +5 °C
Manual temperature change is
not possible.
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EN.33.C.174.1503
Installation instructions | LK Timer Thermostat SR 310
Holiday program
It is possible to select a so-called holiday program. In the holiday program you set the number
of days for which you want a reduced temperature plus the temperature level. The program
starts and ends at midnight.
• Press button briey.
In how many days is the holiday program to start?
• To set the number of days, press and hold
button d.
• Set the number of days using the
buttons.
How long is the holiday program to be active?
• To set the number of days, press and hold
button d.
• Set the number of days using the
buttons.
What temperature do you want during the
holiday program?
• Set the desired temperature using the
buttons.
• Save using the SET button.
Display of an activated function is performed
using the symbol.
• In the display 00:14 is displayed, for instance,
i.e. the number of days remaining. The program is terminated at midnight.
Cancel the holiday program before it has
terminated
• Press and hold button for two seconds.
This cancels the program.
Reset
On a reset the thermostat returns to its factory
settings. Any data that has been changed and
saved will be deleted. Any data that has been
changed and stored will return to the factory settings. After a reset, the time must be set; see the
section: Starting the thermostat for the rst time.
If no time is set after a reset, the thermostat will
keep the temperature constant at 21 °C. The timer
will stop and wait for input.
Calibration
Note. The adjustments below should be carried
out in consultation with an installer/expert
adviser
The timer thermostat has been calibrated before
leaving the factory. If the thermostat’s location turns
out to be unfavourable, e.g. on a cold outer wall, it
may be necessary to recalibrate the thermostat.
Correction for temperature deviation
A temperature deviation can be calibrated/corrected in a range from -3 °C to +3 °C.
Example: The temperature difference between
measured and checked temperature is +2 °C.
Correct the thermostat by -2 °C.
Correction in automatic operation
• Press and hold the SET button and the
button for approximately two seconds.
• Continue to hold the SET button.
• Correct the temperature using the
buttons.
• Save the correction by releasing the SET button and pressing SET again.
Setting of regulation accuracy
Regulation accuracy can be adjusted to ±0.5 K or
±1 K. The factory setting is ±1 K.
Adjustment of accuracy during automatic operation.
• Press and hold the SET and h button for
approximately two seconds.
• Release the h button (keep holding SET).
• Change the set value using the h button.
• Release the h button and save using the SET
button.
Technical data
Control type RS Type 1 according to
EN 60730-2-9
Regulation accuracy ±0.5 K or ±1 K (selectable)
Temperature range 0 °C– +55 °C
Battery type 2 x alkaline AA 1.5 V LR 6
Change-over contact,
volt-free 2 (1) A 250 V~ min. 1 mA, 5 V DC
Safety class Class II according to EN 60730-1
surface mounted
Protection Class IP 20 according to EN 60529
LK Art no. 336 00
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