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Refer to the documentation of the control board
generator, to understand the meaning of Tset.
The last two items of the “MENU PARAMETERS” are
useful functions during installation and maintenance of
the control system.
The item “OT monitor” is dedicated to advanced
diagnostics OpenTherm communication, as it makes
visible the data exchanged between chrothermostat
and control board and shows the analysis of the
communication made from the chrothermostat (master
side). In particular, next to the data shows the following
symbols:
‘●’ correct data exchange
‘T’ RX timeout error
‘R’ RX error
‘?’ generic error (unknow)
‘P’ parity error
‘E’ syntax error
The function “Reconnection”, serves to reconfigure
the chrothermostat in the case has been made an
intervention hardware or software in the control board
of the generator.
Activate the reconnection is equivalent to physically
disconnect the communications connector from the
chrothermostat and then reinsert it.
6. SPECIFIC FUNCTIONS KRONOS GA11
6.1 INTERNAL ENERGY STORE AND USE OF
BATTERIES
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.
6.2 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.
6.3 INSTALLATION INSTRUCTIONS
Respect National and European standards (EN 60335
1/pr EN50165) regarding electrical safety.
Before turning on, check the cables, incorrect wiring
may damage the devices and compromise safety.
Connect and disconnect the control system only in the
absence of voltage.
Avoid exposing the system to dripping water.
Connection to board hot air generator
