Danfoss RET M Instructions D'installation page 14

RET M-NSB model only
GB
When set to the "Moon symbol" , the thermostat controls at 4°C
below the temperature set by the setting dial.
NOTE: if used to control cooling, thermostat controls 4°C higher, with
switch in MOON position.
14
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This model is fitted with a "Day"/Night switch.
When the switch is set to the "Sun Symbol" , the
thermostat controls at the temperature set by
the setting dial.