switches the boiler on/off via the 2 or 3 port valves in accordance with
pre-set times. As a programmer has 2 channels it is possible to
select different on/off times for hot water and central heating.
Often integrated into boiler control panel.
switches the boiler on/off in accordance with pre-set times. it is
not possible to programme hot water and central heating individually.
Often timeswitches are integrated into the boiler control panel.
air temperature and switches the boiler on/off relative to set
temperature. Usually located in the hallway or the lounge.
allows the programming of different room temperatures at different times
of the day thus combining the functions of the timeswitch and the room
thermostat and, as a result, giving better control and therefore better
comfort conditions. Programmable room thermostats would usually be
located in the hallway or lounge.
are available for situations where it is impractical to run a wire
between the boiler and the controls.
monitor air temperature in the room and closes off the flow of hot water
to the radiator when the set temperature is achieved. As the room
starts to cool down the valve will re-open allowing heat to flow to the radiator
are used to turn off/on the flow of water through the radiator.
Thermostat is a
control which is strapped onto the hot water cylinder and monitors the
temperature of the domestic water. It will switch on/off the
boiler via the hot water motorised valve. To reduce build up of
limescale in the cylinder the thermostat should not be set above 60
can be wired into the system to allow more accurate control in differing
used to protect the boiler against freezing. Usually
installed when the boiler is located in an unheated space e.g.
garage, outhouse etc. Many modern boilers have a built in
Valves 2 port
or 3 port motorised valves are used to split the system into
zones. Commonly used to separate central heating and hot water and
to separate, for example, upstairs and downstairs heating circuits.
These are operated via the thermostats and programmer to open or close
hot water flow through the pipe and to switch on/off the boiler as appropriate.