Dimplex DuoHeat Duo300N Operating Instructions Manual page 7

Seasonal settings
Summer
In summer, the heater can be turned off at
the wall. Don't forget to turn it back on when
the weather starts to get cold again.
The heater wil remember both the
Background and Comfort settings which
were set when it was turned off.
Holidays
In the summer the heater can be turned off
at the wall, or in the winter set at the lowest
Comfort and Background setting to protect
the room from frost.
TIP Remember when you switch the heater
on again it may need a 'charge' for 24 hours
before heat is available.
6
X
OFF
@
Min
Set both Background and Comfort
modes to min/frost setting
X
OFF
Max