Computherm Q8RF(TX) Operating Instructions Manual page 3

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
The days of the week
Time
Low battery voltage
Sign of heating/cooling
thermostat includes the following:
Programme
number
Manual control
indicator
- 3 -
Set temperature
Temperature
modification until the
next manual interference
Current temperature
of the room
Timed manual control
indication