3
AUTO
HEAT
COOL
OFF
AUTO
ON
AUTO
HEAT
COOL
OFF
AUTO
ON
SETTING THE CLOCK
Press
PROG
to display the time of day on its own (the display blinks).
Press
DAY
(the display stops blinking) to select today (1 = Monday, 6
= Saturday etc). Press and hold down the + or - button to change the
time quickly in ten minute steps or press and release to change the
time by one minute.
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pm
pm
USER'S GUIDE
Fig. 2.
Clock set to 24 hour (AM/PM)
display.
SELECTING THE TEMPERATURE DISPLAY (°F or °C)
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 Centigrade.
SELECTING THE CLOCK TYPE 12hr (AM/PM) 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 24
hour mode).
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RUN MODE
While the HP75 is in RUN mode, i.e. controlling the space temperature
in accordance with the program, the colon between the hours and
minutes digits blinks. The colon does not blink while the time and
program are being set.
Electronic Programmable Heat Pump Thermostats
HP75-1 with integral sensor
HP75A-1 with remote sensor
How to:
Select a 12 hour or a 24 hour clock display.
Select a °F or a °C temperature display.
Change between Standard Time and Daylight Savings Time at the
press of a button.
Convert the HP75 to act as a thermostat, controlling at the selected
temperature continuously (Heating Mode or Cooling Mode, not both).
Use the HP75 as a frost protection thermostat.
Use the holiday function.
Override the programmed temperature.
Select emergency heat mode.
AUTO
HEAT
COOL
OFF
AUTO
ON
Fig. 1.
Display following a RESET. - RUN
mode. (Colon blinking)
PROG EM HEAT/NEXT
+
-
DAY
COPY
Fig. 4. Clock time ready for
changing.
(Colon steady, digits blinking).
AUTO
HEAT
COOL
OFF
AUTO
ON
When the day and time are correct, press and release
PROG
once to
start the clock and further press and release again until the colon starts
blinking, (RUN mode.) The intermediate stages are explained in the
Setting Instructions.
AUTO
HEAT
COOL
OFF
AUTO
ON
Temperature
override
indicators
Indicates
temperature
display
Heat ON
indicator
Program
override
indicators
Fan
running
indicator
Programmed
COOLING
temperature
indicator
Programmed
HEATING
temperature
indicator
Day of week
A/C ON
indicator
Holiday mode
selected
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18.35
Clock time,
digital
thermometer, or
number of days
on holiday
DISPLAY ELEMENTS
(Those that will appear while following this instruction).
STANDARD TIME / SUMMER TIME CLOCK
When the clocks are changed from Summer Time to Standard Time
(or vice versa) just press and hold down the - button to change from
Summer Time to Standard Time or the + button to change from
Standard Time to Summer Time. The first time this is done (after a
RESET) the clock is set and can only be changed by one hour as
appropriate.
If a mistake is made, e.g. pressing the + button in the autumn when
the - button should have been pressed, rectify the problem by pressing
the correct button and then re-setting the clock by one hour as
appropriate. (Refer to SETTING THE CLOCK).
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