set, the unit should revert to displaying the current
room temperature 5 seconds after the last button
press. The illumination will also turn off after 5
seconds. In manual mode, there will be a hand
symbol displayed on the screen. The new
temperature will remain valid until the next
programmed period starts.
A burner symbol is displayed when temperature
is below desired value, indicating that the
thermostat is calling for heat from the boiler.
Review set temperature
The set temperature can be reviewed at any time,
by a single press of the + or - button. 5 seconds after
this single button push, the unit will show the
current room temperature, and the screen
illumination will turn off.
Frost protection
Frost protection reduces the set temperature to 5ºC.
Frost protection is activated by holding down the
frost protection button for 3 seconds. When in frost
mode, the frost symbol will flash on the display.
The set temperature buttons remain non-functional
during frost mode. The unit will remain in frost
mode until the frost button is held down for a
further 3 seconds.
Battery replacement
When the battery needs replacing, a battery symbol
will flash on the display.
Sleep mode
The unit can be put into sleep mode by simultaneously
holding down the + and - buttons for 3 seconds.
Pressing any button will exit sleep mode. In sleep
mode, all outputs are suspended and the screen is
blank (useful for longer periods when the house is
unoccupied and frost protection is not required).
To clean use a dry cloth only. Do not use any
liquid cleaners.
5. Specifications
Current rating:
3 (1) A
Voltage: 230V,
50Hz
Switch type:
Single pole, change-over (SPCO)
Operating
temperature
range:
0ºC to 50ºC
Set temperature
range:
10ºC to 35ºC adjustable in
0.5ºC
steps
Complies with:
BS EN 60730
Conforms to
directives:
73-23-EEC, 89-336-EEC
Span:
1ºC or 0.5ºC
Micro
disconnection:
Type 1.B control action
Batteries:
2 x AA alkaline
3) The TRT037 comes with a factory installed
(default) programme for both 5-2 and 7 day
options which you use or modify as you wish. Just
pressing the reset button brings this programme
into operation.
The default programme for every day is as
follows:-
6:00 AM
21ºC
8:00 AM
17ºC
12:00 PM
21ºC
2:00 PM
17ºC
4:00 PM
21ºC
10:00 PM
17ºC
For both 5-2 and 7 day options.
To programme the temperature periods, press
the set button. Mon will flash. To programme
Mondays time/temperature periods press select but-
ton. Alternatively use the + and - buttons to change
the day, and then select to continue. The time will
then flash. This is the start time for the first period.
Press + or - to set the hour for the start time for
period 1. Press select to move to the minutes. Use
the + and - to set the minutes. Press select to set the
temperature for this period. Use the + or - keys to
set the desired temperature. Press select again to
programme the next time period. There are
6 time periods per day.
Once the 6 periods for Monday are
programmed, Press set button, and Monday
will start to flash. Use the + and - button to change
the day to Tuesday, and then use select to program
Tuesdays time periods and
temperatures. For 7 day programming, this will need
to be done for all 7 days. If set is pressed twice, the
unit will return to operating mode.
Omitting Days
Omitting a day can be achieved by selecting 10ºC for
every time period for that day (all times and temper-
atures must be entered).
The heating will not turn on unless the room
temperature falls below 10ºC (50ºF).
Programming temperature periods for 5-2 days
option
For 5-2 day mode, time periods and
temperatures will need to be programmed for M-F
and then for S-S. ie: only 2 sets of times need to be
programmed, not 7 (individual) sets of times.
Temperature override
In operating mode, the temperature set for the
current period can be overridden. To adjust the set
temperature, press the + or - button once. The
screen will illuminate blue while button is pressed.
Use + and - buttons to set desired temperature. If
the + or - button is held down, the display will
advance rapidly. Once the desired temperature is
