THERMOSTAT THERMO 091FL
Your new thermostat will serve your family for years and significantly save the
energy cost. The large multi-data liquid crystal display allows you to operate the
feature-rich design with a touch of a button. Before operating the thermostat, we
hope you can read this manual thoroughly.
BE FAMILIAR WITH YOUR THERMOSTAT
There is a sliding door on the right half of the thermostat. If you open the door,
you can see some buttons. This door is removable for the replacement of
Temperature measurement range:
0---34.5°C (0.5°C step)
Temperature control range:
5---30°C (0.2°C step)
6 preset, 3 user-define
0.5°C or 1°C
Heating or Cooling system
Minimum air-con. cycle time:
230VAC 50Hz 5 (3) A
2 x AA alkaline battery
154 x 80 x 30 mm (W x H x D)
0 --- 40°C
-20 --- 60°C
5 --- 90% non-condensing
1. Day of the week Indicator
4. Program Number
5. Program Profile Indicator
6. Frost Protection
7. Manual Override Indicator
8. Output-On Indicator – will be displayed and rotates if the ouput is on. It will
disappear if the output is off
9. Low Battery Indicator – will be displayed if the voltage of the batteries drop to
a certain level. Please change the batteries as soon as possible.
10. Cool mode
11. Heat mode
You can see ☼ and on both the buttons and the LCD. ☼ means comfort tem-
perature and means economy temperature. These two
temperatures are user changeable. Furthermore, there is
a fixed defrost temperature (7°C) indicated by on the
LCD. Throughout the operation of the thermostat we will
refer to them as comfort, economy or defrost temperature
instead of numeric values.
Your thermostat is a programmable. It can automatically adjust the room tempe-
rature to a comfortable level when you are at home, and lower it to save energy
when you go out or sleep. What you have to do is to program the thermostat so
that it knows when to raise the temperature. There are altogether nine programs
contained in the memory of the thermostat. Six of them are preset in the factory
and the remaining three are user changeable.
If you want to change the temperature temporarily and do not want to alter the
programs you have set, you can simply touch a button to override the current
Caution: Switch off the electric source before installing the thermostat. We re-
commend that the installation be performed by trained personnel.
Select a suitable location for the thermostat. The location of the thermostat can
greatly affect its performance. If it is located where air circulation cannot reach,
or exposed to direct sun light, it will not adjust the room temperature properly.
To ensure proper operation, your thermostat should be installed at an inside wall
with freely circulating air. Find a place where your family is usually occupied.
Avoid close proximity to heat generating appliances (e.g. TV, heater, refrigerator)
or exposed to direct sunlight. Do not install near a door where the thermostat
will suffer from vibration.
Wiring terminals are at the back of the thermostat.
You can find two terminals labeled COM and NO. It is a
typical single-pole, single throw (SPST) contact. In most
situations COM and NO are used.
Mounting the thermostat
Using the template provided, drill two ø6mm holes in the wall. Insert the wall
anchors and tighten the left screw with 3mm clearance. Fix the thermostat by
putting it over the screwhead and slide it rightward (note the keyhole-like opening
at the back of the thermostat). Tighten the remain screw to lock it in place.
Note: If the wall is made of wood, there is no need to use the wall anchors. Drill
two ø2.7mm holes instead of ø6mm.
USING YOUR NEW THERMOSTAT
The following procedures show how to operate the thermostat. It is recommended
that you follow the instructions and try to operate once before connecting it to
the heating or cooling system.
The thermostat is operated by two AA alkaline batteries. Please remove the front
SUN MON TUE WED THU FRI
cover and install two new batteries.
When the batteries are installed, your thermostat should be operating and you can
see the LCD active. If your thermostat does not work properly, please check the
batteries if wrong polarities, press the reset button by using a ball-point pen.
The LCD after start or reset:
During stand by mode, the first press any key is to turn on the backlight.
i, Temperature may not be 20°C as the diagram shown and the Output-On in-
dicator may activate after a few seconds, depending on different situations.
ii, Do not use a pencil to push the reset button. The graphite residue of a pencil
can cause a short circuit and damage the thermostat.
2, Set day/time
To set day, press d. Similarly, press h to set hour and m to set minute.
When start or after reset, the time is 00:00,
Sunday. To set the clock to current time (e.g.,
11:23, Tuesday), press d 1 times, h 11 times
and m 23 times.
Note: When you press and hold the keys for 2 seconds, the day/time will change
rapidly. Release when the desired setting comes.
3, View/Change temperature
Press Temp, and the thermostat enter View/Change temperature mode. The
LCD will show the setting of the current temperature mode (☼, or ) which
will be flashing. Press ☼ or to review or change the temperature. Press OK
to directly return to normal operation mode. Buttons used:
i, In normal mode...
ii, Press Temp. The setting of comfort tempera-
ture is flashing:
iii, To change, press ☼. For example, to change
to 20.0°C, press ☼ 5 times :
iv, To review economy temperature, press ,
v, You can press key again to set the economy
temperature, or press OK to return to normal
i, The temperature setting range is 5° to 30°C.
ii, To lower the setting, enter View/Change temperature mode and press ☼ or
until it reaches 30°C and then the setting will return to 5°C. Continue to
pressing until the desired setting comes.
iii, The setting will change rapidly by pressing and holding the keys.
iv, Please note the temperature mode indicator. A ☼ means the comfort tempe-
rature is being viewed or changed. A indicates economy temperature. If is
shown, it is defrost temperature. Defrost temperature is always at 7°C and is
v, It is not always necessary to use the OK key to return to normal operation
mode. After 15 seconds of no key pressed it will automatically return to normal
4, Manual Override
Press ☼ to select comfort temperature. Press to select economy temperature.
The current temperature mode will be overrode until the next set point of the
program comes. Press OK to clear override. Buttons used :
i, In normal operation mode, press to change
the current comfort setting to economy set-
The temperature is now set to economy mode.
This mode will be held until 23:00. (It is because
the program for the day is PROG 1. At 23:00 the
temperature will change from comfort to econo-
my, which matches the override setting.)
Timer hold is an alternative to manual override. Press and hold ☼ (or ) key for
2 seconds, the hold time will appear. Press the key again to set the hold time.
Press OK to return to normal operation mode. The maximum can be set is 24
hours. In the hold period the temperature will not be affected by the program.
When timer hold is active, pressing the corresponding temperature mode key
(e.g., ☼ if comfort mode is being held) will show the remaining hold time. The
remaining hold time can also be changed by using the same key. If another
temperature mode key is pressed (e.g., if comfort mode is being held), the timer
hold will be cleared.
i, To change the current setting from comfort to
economy for 5 hours, press and hold for
approxmiate 2 seconds. The hold time will
ii, The hold time is 1 hour. Press 4 times to
change the hold time to 5:
iii, Press OK or just leave no key pressed for 15
seconds, the thermostat will return to normal
i, A 'hand' appears when the current temperature mode is being overrode.
ii, The setting will change rapidly by pressing and holding the keys.
5, View/Change Programs
Press Prog, the program of the current day is ready to be changed.
Press Prog again to advance to the next day and the program of that day will
Press Prog# to change the program.
Program 6, 7 and 8 are user-define programs. You can use ☼ or to change
the distribution of comfort or economy temperature and h to review the setting.
Press OK to return to normal operation mode.
There are altogether nine programs available, as
the diagram shown:
Program 0 is a special program. It will set the whole
day to defrost temperature (7°C). (If cooling mode
is selected, it will turn off the system. See Part 8,
Controlling a cooling system.)
Program 1,2, and 3 are some typical schedules of a
day. You can select them if you find them suitable.
Program 4 sets the whole day to comfort temperature
while program 5 sets it to economy.
Program 6, 7 and 8 are user-define programs. They
can be modified to suit your need.