SunStat User Instruction Leaflet: LE/0222/7001/0001/03 Page 1of 3
User Instructions
What is a programmable room thermostat?
A programmable room thermostat is both a programmer and a
room thermostat. A programmer allows you to set 'On' and 'Off'
time periods to suit your own lifestyle. A room thermostat
works by sensing the air temperature, switching on the heating
when the air temperature falls below the thermostat setting,
and switching it off once this set temperature has been
reached.
So, a programmable room thermostat lets you choose what
times you want the heating to be on, and what temperature it
should reach while it is on. It will allow you to select different
temperatures in your home at different times of the day (and
days of the week) to meet your particular needs.
Turning a programmable room thermostat to a higher setting
will not make the room heat up any faster. How quickly the
room heats up depends on the design of the heating system,
for example, the size of boiler and radiators.
Neither does the setting affect how quickly the room cools
down. Turning a programmable room thermo stat to a lower
setting will result in the room being controlled at a lower
temperature, and saves energy.
The way to set and use your programmable room thermostat is
to find the lowest temperature settings that you are
comfortable with at the different times you have chosen, and
then leave it alone to do its job. The best way to do this is to
set low temperatures first, say 18°C, and then turn them up by
one degree each day until you are comfortable with the
temperatures. You won't have to adjust the thermostat further.
Any adjustments above these settings will waste energy and
cost you more money.
If your heating system is a boiler with radiators, there will
usually be only one programmable room thermostat to control
the whole house. But you can have different temperatures in
individual rooms by installing thermostatic radiator valves
(TRVs) on individual radiators. If you don't have TRVs, you
should choose a temperature that is reasonable for the whole
house. If you do have TRVs, you can choose a slightly higher
setting to make sure that even the coldest room is comfortable,
then prevent any overheating in other rooms by adjusting the
TR V s.
The time on the programmer must be correct. Some types
have to be adjusted in spring and autumn at the changes
between Greenwich Mean Time and British Summer Time.
You may be able to temporarily adjust the heating programme,
for example, 'Override', 'Advance' or 'Boost'. These are
explained in the manufacturer's instructions.
Programmable room thermostats need a free flow of air to
sense the temperature, so they must not be covered by
curtains or blocked by furniture. Nearby electric fires,
televisions, wall or table lamps may prevent the thermostat
from working properly.
INTRODUCTION
The SunStat is a wired programmable room thermostat. A SunStatRF
should be purchased if a wireless (RF) version of the same unit is
required.
Thermostat position
The thermostat should be placed at a height of 1.5m from the floor.
Do not position on an outside wall, above a radiator, next to a door, or
in direct sunlight.
For fixed wiring only
Disconnect the mains supply before attempting to wire the unit, or
removing unit from back plate. A switch having a contact separation
of at least 3mm in all poles must be incorporated in the fixed wiring as
a means of fully disconnecting the mains supply. An appropriate fuse
should also be fitted to the circuit.
WARNINGS
All installations should be carried out by a
competent person and in line with current
wiring regulations.
The covers must not be removed from any
part of the units before the electrical supply
has been isolated.
Interference with sealed parts will render the
guarantee void.
Safe Disposal
SUNVIC CONTROLS Ltd.
Units 1 & 2, Block 1
251 Low Waters Road
Cadzow Industrial Estate
Hamilton
ML3 7QU
Tel. +44 (0)1698 812944
Fax +44 (0)1698 813637
Technical Helpline +44 (0)1698 810945
N.B.
In line with a policy of continuous product development,
SUNVIC CONTROLS Ltd. reserves the right to change the
specification, design and materials of products without prior notice.
The SunStat Programmable Room Thermostat
SunStat User Instruction Leaflet: LE/0222/7001/0001/03 Page 2of 3
Programming Instructions
Set/Adjust Clock
Setting sequence is
Hour>Minute>Year>Month>Day
Spin the rotary selector to “START”.
1. Press & hold for 3 seconds to enter setting mode.
2. The “Hour” number on the LCD will flash.
3. Press or to set the correct hour.
4. Press the to set the minute.
5. Press or to set the correct minute.
6. Follow the same procedure as above to set the “year” then
“month” and “day” respectively.
7. Press again if further changes to the clock are
required.
8. When satisfied that the clock has been set correctly press
to confirm & save the changes.
9. Any delay of longer than 15 seconds when setting the clock,
will result in the unit returning to normal operation without
saving the changes
Set / Adjust Clock
It is possible to set 4 different programs for each day of the week.
Each program comprises of 1 temperature and time set points. 4
symbols are used to differentiate the programs.
1
st
program of a day “P1” is indicated by
2nd program of the day “P2” is indicated by
3
rd
program of the day “P3” is indicated by
4th program of the day “P4” is indicated by
The thermostat will hold the room temperature at the required set
point within each programmed time zone. At the next programmed
time zone the temperature can be changed, if required, to a
different temperature setting.
The program resolution is in 10 minutes intervals. The first interval
of the day starts at 00.00 is the last interval of the day starts at
23.50.
The programming is designed to allow users to “overlap” time
zones, if required. If an “overlap” is selected the number of
programmes will reduce by the number of “overlaps” For example
if the start up time of P3 is the same as the start up time of P4,
then the P3 operation will become an invalid command.
Program default settings
Program No On Time Temperature
P1 06.00
21.0°C
P2 08.00
18.0°C
P3 16.00
21.0°C
P4 23.00
17.0°C
Setting the program
1) Spin the rotary selector to the day of the week that
is required to be programmed (Monday for example).
2) Note that Monday corresponds to day 1 on the top line of the
display. Tuesday corresponds to day 2 etc.
3) Press or to set the required P1
temperature.
4) Press to save the required P1 temperature.
5) Press or to set the required P1 start time.
6) Press to save the required P1 start time.
7) Repeat the above procedure for P2, P3 & P4 to set the
remaining temperature and time set points for the selected day.
8) To set a different day, spin the rotary selector to the next
required day in the week and repeat the above procedure.
9) After completing the settings for all 7 days, spin the rotary
selector to “START”. The thermostat will automatically retain the
settings and start to operate.
Copy Function
The copy function allows a program setting to be copied from one day
to any number of the remaining days.
1) Use the rotary selector switch to select the day which will be
used as the source (Monday for example).
2) Check, if necessary, that the “day” to be used as the source
program has been programmed correctly, using the above
“setting the program” procedure.
3) When satisfied that the source day, in this case Monday, has
been programmed correctly press button.
4) The LCD will show
5) Spin the rotary selector to the day of the week that requires the
same program settings as the ”source day” (Tuesday for
example).
6) Press to confirm and save the source program
settings to the selected day, Tuesday in this example.
7) The display will show.
8) Spin the rotary selector to any of the remaining days of the week
that require the same program settings as the “source day”.
9) Press to confirm and save the source program.
10) If the “source day” requires to be copied to a second day then
move the rotary selector to the required day (in this example
Thursday).
11) Press to confirm and save the source program to the
selected day.
12) The display will show.
13) Repeat steps 10) and 11) if the source program is required to
copied to another day of the week.
14) Spin the rotary selector to “START” after the source day has
been copied to all the desired days of the week. The thermostat
will retain settings and start normal operation.
SunStat User Instruction Leaflet: LE/0222/7001/0001/03 Page 3of 3
15) If it is required to copy a second “source day” to a day of the
week that has not been programmed or requires to be
changed then repeat steps 1) to 7) and when complete step
14).
16) The user can delete a day of the week that has been wrongly
selected during the “COPY” process by pressing the
button to remove the selected day from copy process.
17) For example, if during the copying process Tuesday,
Thursday and Friday have been selected as the days
requiring the ”source day” program to be copied to, the
display will show.
18) If, using the above example, Thursday has been wrongly
selected then spin the rotary selector to Thursday and then
press.
19) On the display the digit “4” will flash.
20) Spin the rotary selector away from Thursday and “4” will
disappear from the display.
21) Thursday has been deleted
from “COPY”.
22) Any other day can be selected and deleted as above.
Manual Override
When the thermostat is operation normally (rotary selector
switch in the “START” position) the set temperature can be
temporarily overridden until the next program start time.
1) Press the or to temporarily raise or
lower the set temperature to the desired level.
2) After the second press of either or buttons
will appear on the display indicating that the unit is in
the manual override mode.
3) Spin the rotary selector away from “START” and then back to
“START” to stop the manual override and return the system
to the normal program settings.
Holiday Mode
The Holiday Mode allows the user to fix the set temperature for a
designated period of time. This period can range from 1 hour to 99
days or permanently. This allows the user to set a low background
temperature when they will be away from the room for a longer
period than normal (e.g. when on holiday).
1) To activate the Holiday Mode spin the rotary selector to
“START” and the press the button.
2) The temperature setting on the display will flash.
3) Press or to set the required temperature.
4) Press to save the set temperature and select the
duration of the holiday period.
5) The display “1h” character will now flash.
6) Press or to select the required duration of the
holiday period.
7) The duration of the holiday period ranges from 1h (1 hour) to
99d (99 days) and “⎯ “ (permanent).
8) Press to start the holiday mode.
9) The will appear on the display when the “Holiday Mode”
is active.
10) To de-activate “holiday mode” spin the rotary selector away
from “START” and then back to “START”.
11) The symbol will disappear from the display when the
“holiday mode” has been de-activated.
Frost Protection (Stand-by)
The thermostat has a stand-by facility. When in stand-by mode the
thermostat is off unless the temperature falls below 5°C.
1) Spin the rotary selector to “START”.
2) Press and hold for 3 seconds.
3) A will appear on the display.
4) The thermostat will remain off unless the temperature drops
below 5°C.
5) To return the thermostat to normal operation, when in stand-by
mode, press and hold for 3 seconds to return the unit to
normal operation.
Operation Time
The thermostat has the facility to measure the amount of time it sends
a boiler or cooling “ON” command. This is designed to help the user
estimate the cost of heating or cooling.
1) The function can record up to a maximum of 999 hours and 59
minutes.
2) Press to check how long the thermostat has been in
operation.
3) To reset the counter:
a. Press to display the operation time
b. Press and hold for 3 seconds.
c. The operation time will then flash
d. Press to reset the recorded time to 000.00.
4) The counter will automatically restart. After a few seconds the
display will return to normal.
5) Please note the recorded operation time will automatically reset
when the clock has been adjusted.
Low Power Indication / Changing the batteries
a) A low battery indicator will be displayed on the LCD
when the batteries need to be changed.
b) The display unit has to be removed from the back-plate in order
to replace the batteries.
c) Before removing the display unit from the back-plate disconnect
the mains power.
d)
Remove the display unit from the back-plate by loosening the
retaining screw on the left hand side of the unit and then lightly
pull the display unit away from the back-plate.
e) The battery compartment is located on the inside of the display
unit.
f) Replace the batteries, taking care that they are orientated
correctly and then re-fit the display unit to the back-plate and
then tighten the retaining screw.
g) Always replace both (2) batteries at the same time. Only use
1.5V alkaline batteries of the type LR06 (AA).
h) Do not dispose of batteries with household rubbish. They must
be returned in accordance with the local statutory requirements.
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