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The effective range of the transmitter incorporated in the thermostat is approxi-

mately 50m in open terrain. This distance may become considerably shorter 

within a building, especially when a metal structure, reinforced concrete or ado-

be wall stands in the way of radio waves.
The switching sensitivity of the thermostat can be set to ±0.1°C, ±0.2°C (default 

setting) or ±0.3°C. This figure means the temperature difference between the 

adjusted value and the actual temperature measured during the switching pro-

cess. In case of the ±0.2°C switching sensitivity and heating mode for example, 

if the set temperature is 20°C, then the device switches the boiler on at 19.8°C or 

below, and switches it off at 20.2°C or above. Please refer to Section 2.4 for the 

modification of the factory default switching sensitivity of ±0.2°C.

The thermostat is equipped with a pump protection function, which, to pre-

vent the pump from sticking, switches on the boiler for a one minute period at 

12:00 p.m. every day if the pump has not been switched on in a programmed 

manner for more than 24 hours (e.g. outside the heating season). See the 

activation of the pump protection function in 

Section 2.5

.

The information shown on the liquid crystal display of the 

thermostat includes the following:

- 3 -

The days of the week

Manual control 

indicator

Current temperature

of the room

Set temperature

Low battery voltage

Sign of heating/cooling

Time

Programme 

number

Temperature 

modification until the 

next manual interference

Timed manual control 

indication

Summary of Contents for Q8RF(TX)

Page 1: ...COMPUTHERM Q8RF TX Multi zone programmable wireless radio frequency digital room thermostat Operating Instructions NEW design...

Page 2: ...ure at the dates and times specified by you to reduce energy costs while maintaining comfort Separate temperature programs can be prepared for each day of the week For each day beside 1 fixed switchin...

Page 3: ...9 8 C or below and switches it off at 20 2 C or above Please refer to Section 2 4 for the modification of the factory default switching sensitivity of 0 2 C The thermostat is equipped with a pump prot...

Page 4: ...e thermostatic head may disturb the temperature control of the flat 2 PUTTING THE THERMOSTAT INTO OPERATION BASIC SETTINGS 2 1 Inserting batteries Pressing the lock on the upper side of the housing of...

Page 5: ...between the heating and cooling mode There is a possibility to easily switch between the heating and cooling mode of the thermostat The output terminals of the receiver unit No 1 NO and No 2 COM are c...

Page 6: ...deactivate this function using the large and buttons The notices and indicate activated and deactivated state respectively Finally confirm the setting by pressing the SET button if no buttons are pres...

Page 7: ...ctivate more than one switch for each day Furthermore it is advised that a comfort temperature is used only those times when the room or building is in use since every 1 C decrease of temperature save...

Page 8: ...s should be copied using the COPY button A separate program can be created for the heating and cooling mode and these programs are preserved when switching between the modes Therefore if the thermosta...

Page 9: ...ich is indicated on the display of the device by flashing the temperature value to be set C by default Set the desired temperature using the large and buttons then press the PROG button e Then the sta...

Page 10: ...the flashing abbreviation MON indicating Monday shows that conditions are ready for copying a program Select the day whose program you wish to copy to another day or other days using the large and but...

Page 11: ...the new program as described in Sections 2 and 3 3 6 Program inspection First press the SET button to go to the main screen then press the PROG button At this point the abbreviation indicating the da...

Page 12: ...program switch Set the required temperature using the large and buttons on the front panel of the device At this time the icon appears on the display indicating that the thermostat is operated with m...

Page 13: ...anual control e g that is 3 days After this time has elapsed the icon disappears and the device resumes the program that has been set If you wish to return to the set program before the time set for t...

Page 14: ...voltage appears on the display the batteries should be replaced see Section 2 1 The exact time should be set again after the batteries have been replaced but the device saves the program that has bee...

Page 15: ...spectively When the receiver unit fails to receive signals sent by the thermostat then the receiver unit is outside the transmission distance of the wireless radio frequency transmitter thus they have...

Page 16: ...Start time Temp C Start time Temp C Start time Temp C Start time Temp C Start time Temp C Start time Temp C Start time Temp C MONDAY MON SUNDAY SUN SATURDAY SAT FRIDAY FRI THURSDAY THU WEDNESDAY WED T...

Page 17: ...t the temperature using the and buttons for a period of 1 to 9 hours set the temperature using the and buttons then press the DAY button and finally set the duration using the and buttons for a period...

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