3
Electronic Programmable Room Thermostats
TP75 with integral sensor
TP75A with remote sensor
TP75B with remote teleswitch
TP75AB with remote teleswitch and remote sensor
USER'S GUIDE
How to:
Select a 12 hour or a 24 hour clock display.
Select a °C or a °F temperature display.
Change between Winter Time and Summer Time at the press of a
button.
Convert the TP75 to act as a thermostat, controlling at the selected
temperature continuously.
Use the TP75 as a frost thermostat.
Use the holiday function.
Override the programmed temperature.
Extend an existing temperature for 1, 2 or 3 hours.
Heating System Performance.
The TP75 includes one in-built and two optional energy saving and
comfort enhancement features that may have been enabled by your
installer. All will affect the way in which the heating system operates,
and this will be different from that provided by conventional time
controls and room thermostats.
The in-built feature is an intelligent electronic anticipator which measures
the rate of temperature rise then switches the boiler off before the set
temperature is reached. However the required comfort temperature
will be reached due to the residual heat in the system after the boiler
has shut down. This feature is only activated when the room temperature
is 2°C or more lower than the set temperature.
If the optional Optimum Start Control feature has been enabled,
(indicated by the display showing typically 0:30 and OP after the
second press of the PROG button from the RUN mode), then the boiler
will fire some time before the programmed event 1 time to provide the
event 1 comfort temperature by that time.
If the optional Chrono-proportional feature has been enabled, then the
boiler will fire at regular intervals to maintain radiator temperature and
so prevent the large swings in room temperature caused by radiators
alternating between very hot and cold. In mild weather and when the
system is up to temperature the boiler may fire only in short bursts with
long periods of inactivity. This is not a fault, and will provide increased
comfort .
RUN MODE
Whilst the TP75 is in RUN mode, i.e. controlling the space temperature
in accordance with the programme, the colon between the hours and
minutes digits blinks. The colon does not blink whilst the time and
programme are being set.
+ 1 HR
+ 2 HR
+ 3 HR
Fig. 1. Display following a
RESET. (Colon blinking)
DISPLAY ELEMENTS
(Those that will appear whilst following these user's instructions).
Temperature
override
indicators
Indicates
temperature
display
Extended
temperature
indicators
+ 1 HR
+ 2 HR
+ 3 HR
Programmed temperature
indicator
Boiler ON
indicator
Holiday mode
selected
Programme
type indicator
Clock time,
digital
thermometer,
or number of
holiday days
Day of week
+ 1 HR
+ 2 HR
+ 3 HR
Fig. 2. Clock set to 12 hour
display.
+ 1 HR
+ 2 HR
+ 3 HR
SELECTING THE CLOCK TYPE (12hr or 24hr)
The factory pre-set clock has a 24 hour display. If a 12 hour display
with AM/PM indication is preferred then press and hold down the NEXT
and DAY buttons until the display changes. Repeat to return to a 24
hour display.
SELECTING THE TEMPERATURE DISPLAY
(°C or °F)
The factory pre-set temperature display is °C. If a °F display is
preferred then press and hold down the DAY and COPY buttons until
the display changes. Repeat to return to a °C display.
Fig. 3. Temperature range
changed to Fahrenheit.
