17040952—ENG
8/12
USE
OF
BATTERIES/BACKLIGHT
The chronothermostat is provided with an internal
energy store which can compensate for a power cut‐off
for a few hours; in this way the user will not have to set
the current time, room temperatures and week program
again. However, the internal energy store consumption
time varies depending on the room temperature and
humidity, as well as on the ageing of components. In
order for the internal energy store to be fully effective,
the chronothermostat must have been correctly
energized for a couple of days at least without
interruption. If frequent and/or long cut‐offs of the
boiler power supply are expected, it is possible to avoid
losing chronothermostat data by installing two alkaline
batteries type AAA LR03 1,5V into the appropriate slot
on the fixing base. In this way, the additional internal
energy store, made by new batteries, enables to
preserve data for a period even longer than one year
under no power supply conditions. It is advisable not to
keep batteries inside the chronothermostat for a long
time during normal operation (power supply presence)
to prevent any battery liquid leakage from damaging the
chronothermostat itself. Finally, please note that
Kronos GA11 does not provide any information about
the presence of batteries or their charging status.
WARNINGS
ABOUT
THE
BACKLIGHT
The display
backlight is obtained from the reserve described in the
previous paragraph. It is possible, therefore, that in case
of newly connected chronothermostat the brightness is
minimal or absent because of insufficient internal
charge: this must not alarm as they are just a few hours
of connection, because the backlight to begin to be
efficient. You can, if desired, to remedy this temporary
lack of backlighting installing alkaline batteries, making
sure the polarity and following the instructions in the
previous paragraph.
INSTALLATION
ON
THE
WALL
First step, remove the cover containing the electronic
board by pushing the appropriate button that says
"PUSH", located on the lower unit and rotating the cover
itself up, until it is fully removed, as shown in figure 2.
For the fixing on the wall it is possible to use many holes
provided on the bottom of the base, in this case, see
figure 3.
Figure 2
Then is possible to wire the circuit board unit using
the appropriate terminal, regardless of the polarity
(the two conductors can be exchanged). It is
recommended to use a twisted pair cable (example
H03RR‐F o H03VV‐F) size between 0,5 mm2 and 2,5
mm2, the length should not exceed 50m (eg : GA11 –
50m – unit 1 – 50m – unit 2 – 50m – unit 3). The
resistance of each conductor, in any case, should not
exceed 5 ẇ. In environments with electromagnetic
interference it is recommended to use a shielded
twisted pair cable.
Figure 3 : Fixing holes
Figure 4 : External dimensions
