What is a programmable room thermostat?
A programmable room thermostat is both a
programmer and a room thermostat.
A programmer allows you to set ‘On’ and ‘Off’
time periods to suit your own lifestyle.
A room thermostat works by sensing the air
temperature, switching on the heating when the
air temperature falls below the thermostat
setting, and switching it off once this set
temperature has been reached.
A programmable room thermostat lets you
choose what times you want the heating to be
on, and what temperature it should reach.
It will allow you to select different temperatures
in your home at different times of the day (and
days of the week) to meet your particular needs.
Turning a programmable room thermostat to a
higher setting will not make the room heat up any
faster. How quickly the room heats up depends
on the design of the heating system, for example,
the size of boiler and radiators.
Neither does the setting affect how quickly the
room cools down.
Turning a programmable room thermostat to a
lower setting will result in the room being con-
trolled at a lower temperature, and saves energy.
The way to set and use your programmable room
thermostat is to find the lowest temperature
settings that you are comfortable with at the
different times you have chosen, and then leave it
alone to do its job.
The best way is to set low temperatures first, say
18°C, and then turn them up by one degree each
day until you are comfortable with the tempera-
tures.
You won’t have to adjust the thermostat further.
Any adjustments above these settings will waste
energy.
If your heating system is a boiler with radiators,
there will usually be only one programmable room
thermostat to control the whole house.
But you can have different temperatures in indi-
vidual rooms by installing thermostatic radiator
valves (TRVs) on individual radiators.
If you don’t have TRVs, you should choose a
temperature that is reasonable for the whole
house. If you do have TRVs, you can choose a
slightly higher setting to make sure that even the
coldest room is comfortable, then prevent any
overheating in other rooms by adjusting the
TRVs.
Programmable room thermostats need a free flow
of air to sense the temperature, so they must not
be covered by curtains or blocked by furniture.
Nearby fires, televisions, wall or table lamps may
prevent the thermostat from working properly.
GENERAL INFORMATION
PROGRAMMABLE THERMOSTATS
OPERATING & INSTALLATION
INSTRUCTIONS 3
DIGISTAT OPTIMISER PROGRAMMER
7 DAY ROOM THERMOSTAT SYSTEM
716 114 519a (09.07)
