General Information; Programmable Thermostats - Worcester 24CDi Instruction Manual

What is a programmable room thermostat?
A programmable room thermostat is both a pro-
grammer 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 tem-
perature, switching on the heating when the air
temperature falls below the thermostat setting,
and switching it off once this set temperature has
been reached.
So, a programmable room thermostat lets you
choose what times you want the heating to be
on, and what temperature it should reach while it
is on. It will allow you to select different tempera-
tures 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 set-
tings that you are comfortable with at the differ-
ent times you have chosen, and then leave it
alone to do its job.
The best way to do this is to set low tempera-
tures first, say 18°C, and then turn them up by
one degree each day until you are comfortable
with the temperatures.
You won't have to adjust the thermostat further.
Any adjustments above these settings will waste
energy.
OPERATING & INSTALLATION
2
INSTRUCTIONS

GENERAL INFORMATION

PROGRAMMABLE THERMOSTATS

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 tem-
perature 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 overheat-
ing 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.
DIGISTAT PROGRAMMABLE 24 HOUR
ROOM THERMOSTAT SYSTEM
8 716 114 518a (09.07)