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Room thermostat
Comfort I – 6720810964 (2017/02)
Fig. 16
Turn the knob briefly to display the required room
temperature. Continue turning anti-clockwise to decrease the
temperature and clockwise to increase it. The new temperature
setting will flash for three seconds.
Fig. 17
If the Programmer/Receiver is in an OFF period, the Room
thermostat will display the new temperature setting flashing for
three seconds and then OFF flashing for three seconds.
Low battery
The battery symbol indicates the batteries require replacing
within two months refer to section 9.1
Burner ON indicator
The symbol is shown when the boiler is firing. There may be up
to a six minute delay between the boiler firing and the symbol
being displayed.
Low RF signal strength
A continuous A21 fault code indicates no RF signal, refer to
section 6.7 for the signal strength indication on the Room
Thermostat. 5.2.4To improve signal strength it may be
necessary to move the thermostat to a more suitable location
6.2 Settings
These functions are only used by the installer/service engineer
and are useful during installation.
To enter the Settings menu:
1. Press the knob until two bars are displayed.
2. Release the knob to enter the Settings menu
Fig. 18 Enter the Settings menu
To leave the Settings menu:
1. Press the knob until three bars are displayed.
2. Release the knob to leave the Settings menu and display
the current room temperature
Fig. 19 Leaving the Settings menu
The following Settings sub-menus are available:
1. E 1 Room temperature sensor adjustment
2. F 1 Factory reset
3. rF 1 Pairing/Unpairing
4. S 1 Software version
5. S 2 RF signal strength indication
Turn the knob clockwise to cycle forward through the menus
and anti-clockwise to cycle back to E 1.
6720810964-26.1Wo
The A21 fault code will be displayed at initial
switch on until the two units have established
an RF communication link
If a fault code is displayed the user must first
press the knob to return to the main display then
the user can hold the knob to enter the Settings
menu
6720810964-17.1Wo
6720810964-28.1Wo
14


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