Invensys Climate Controls Limited
Cordwallis Street, Maidenhead, Berkshire SL6 7BQ
Telephone: (01628) 672121 Sales Facsimile: (01628) 675062
Technical Helpline: (01895) 460444
An Invensys Product
090 796
Invensys Climate Controls reserve the right to make changes without notice and cannot accept liability for errors. 0200
TEMPERATURE OVERRIDE
If at anytime during normal operation, you wish to temporarily increase or decrease the set
temperature use the + or – buttons to change to your desired setting. This can be done without
entering the SET mode. 5 seconds after releasing the + or – button the display will revert to
showing the actual room temperature. The Digistat will now control the temperature to the
override setting until the next programmed switching time, when it will revert to the times and
temperatures you have already programmed.
BATTERY REPLACEMENT
30 days before the batteries need replacing, a battery symbol will flash in the
right hand side of the display (Dia. C). This signifies that four 1.5V type
AA alkaline batteries will be needed to replace the existing ones. If
battery replacement is carried out in this condition the programmed
settings will only be held in the memory for a maximum of
one minute, after which re-programming may be necessary.
IMPORTANT
To avoid the possibility of having to reprogramme the switching times
and temperatures, it is advisable to wait until the display with a flashing
battery symbol changes to a continuous battery only display (after 30 days
– Dia. D). In this condition the unit will remain OFF but your program-
med settings will be held in the memory for a number of weeks. The two battery compartments can
now be left open, to replace the batteries, for approximately one hour. If the compartments are left
open for longer, the unit will revert to the factory preset times and temperatures. It may be
necessary to reset the correct time of day after changing the batteries.
The battery compartments are situated at the bottom of the unit (press to unlatch and slide
down). Ensure new batteries are installed correctly. Close the right hand compartment first followed
by the left.
HELPFUL HINTS
1. First/last set times The Day 1 setting cannot be programmed before 12.00. The night
setting can be programmed at whatever time you require, even after 12.00 (midnight) so long as
it is not programmed more than 23 hours 50 minutes after the Day 1 setting.
2. Part or full day omission If during programming the Digistat, one of the symbols on the left
hand side of the screen starts to flash, this indicates that two or more of the switching times have
been set to the same time. This facility enables you to omit one or more of the switched periods.
When one or more switching times are programmed together the later setting takes precedent. For
example, if all four switching times were set together the Digistat would control continuously at the
fourth (night) temperature setting .
3. Programme sequence The Digistat will not allow you to program the switched periods out of
sequence but will hold the times together as stated above.
4. Reset If at any time during the programming you get confused and would like to start the
procedure from the beginning press the SELECT and – buttons at the same time and hold for two
seconds. This resets the Digistat to the factory preset times and temperatures shown in the table
(overleaf).
5. Self revert If during programming no button is pressed for between one and two minutes the
Digistat will revert automatically to its normal operating mode.
IMPORTANT
This product operates on a new frequency of 433 MHz and is not interchangeable with previous
418 MHz units which can be easily identified:
433 MHz = Drayton brand
418 MHz = brand
CONFORMS TO THE ESSENTIAL REQUIREMENTS
OF THE FOLLOWING DIRECTIVES:
89/336/EEC Electromagnetic compatibility
