Computherm Q3RF Operating Instructions Manual page 4

The device consists of two units. One of them is the portable
control unit (thermostat), while the other unit is the receiver
that controls the boiler. Because there is a wireless (radio-
frequency) connection between the two units, no cable is
required between the thermostat and the boiler. The two units
have been tuned in the factory. The trouble-free operation
is ensured by its own security code. The installation and
connection of the receiver unit is described in Chapter 7.
To increase the lifetime of the batteries, the thermostat will
not transmit signals continuously. Instead it will repeatedly
transmit the actual signal every 5 minutes. Therefore, the
regulation of the heating or cooling will continue even after a
blackout.
The portability of the thermostat offers the following
advantages:
– no need to lay a cable, which is especially advantageous
when old buildings are being modernized,
– the optimal location of the device can be selected during
operation,
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