Computherm Q7 Operating Instructions Manual page 8

No. 1 (NO); No. 2 (COM) and No. 3 (NC). These con-
nection points are located under an inner cover on
the inner side of the rear panel.
Connect the two connection points of the heating
or cooling equipment to be controlled to terminals
No. 1 (NO) and No. 2 (COM), i.e. to the normally
open terminals of the relay.
If you would like to operate an old boiler or any other
device that has no connection points for thermostats,
then the No. 1 (NO) and No. 2 (COM) connection points of the
thermostat should be connected to the mains cable of the device,
similarly as a switch would be connected.
To prevent electric shock, replace the inner cover removed for
the connection of wires after the assembling process has been
completed.
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