M-Therm HT-08 Installation Manual
Digital Thermostat
M
-Therm HT- 08
For
M
-Therm 24 Volts heating systems
1 / 2
Installation guide
General instructions
This device is not intended for use by persons (including children) with limited physical, sensory or mental abilities or lack of
experience and/or knowledge unless they are being supervised by a person responsible for their safety or if they are having been
instructed by this person on how to use the device. Children should be supervised in order to make sure that they do not play with
the device.
1
Selection of the place of installation
Please observe the following instructions on how to optimize functioning and energy consumption:
1.1 Place thermostat on inside wall approx. 1.5 meter above floor.
1.2 Avoid position where the measuring of the temperature can be influenced by the surroundings, such as direct sunlight,
proximity to heating and cooling devices, right next to entrance/exit/window, in front of the heating panels, etc.
1.3 Use the programming possibilities of the thermostat to individually adjust the room temperature to your way of living.
2
Opening the case of the device
2.1 Insert a flat screwdriver into the slot.
2.2 Press carefully, exercising an upward seesaw movement onto the locking
mechanism and take off the front cover of the thermostat.
3
Inserting the batteries / changing of batteries
3.1 Insert two batteries (AA, LR6) with the correct polarity into the battery compartment as indicated (+ / -).
3.2 Do always change both batteries and only use high-quality alkaline batteries. Replace the batteries as soon as possible when
the display shows the warning „LO“. Remove batteries from the device when it is not in use for an extended time (for instance
in summer) in order to avoid a possible battery leakage.
4.
Connecting the thermostat
4.1 On back part of the device, loosen the retaining screw of the protective cover and take off the cover.
4.2 Insert the thermostat cable from the back and connect the two cores of the thermostat cable as follows: the white cable is
connected to connection 2 and the brown cable to connection 3.
4.3 Fit back the protective cover to the base and tighten it with the retaining screw.
4.4 Re-insert the front cover after fixing the base to the wall. Now, you are ready to start programming.
Programming instructions
5
Set weekday and time
5.1 Set the rotary switch to position (RUN).
5.2 Press the key (clock) to start programming. Beware that the display returns to the main menu after 5 seconds if no key is
pressed.
5.3 The weekdays (numbers from 1 to 7) will be set first. Press (+) or (-) to select the weekday, for instance Monday = 1,
Tuesday = 2, etc.
5.4 Press (clock) again, while the display is still blinking, to enter programming of hour and minute. Press (+) or (-) to adjust.
5.5 After having set weekday and time, simply wait for 5 seconds: the settings will be saved automatically.
6
Set comfort temperature / lowered temperature
This thermostat controls the operation of the heating system with two different temperature values. The initial setting of the comfort
temperature is 20.4 °C and 16.2
°C for the lowered temperature.
6.1 Set the rotary switch to position (RUN).
6.2 Press the sun key ( ) twice to move to comfort temperature. Now, you can set the comfort temperature you prefer by using
the keys (+) and (-).
6.3 Wait for 5 seconds after settings are finished. The thermostat saves the value automatically and switches to operating mode.
6.4 For the setting of the lowered night temperature repeat step 6.1 to 6.3 with the moon key ( )
For an optimal comfort, the difference between day and night temperatures should not be more than 4°C.