3 Operation
Operation manual
5
D2CND024A1/4AB + D2TND012~024A4AB
Wall-mounted condensing boiler
3P469438-3M – 2019.11
When this function is active, boiler operates according to a defined
set value for around 15 minutes and the
icon blinks. After this
function is ended, normal operation goes on.
INFORMATION
Low water temperature function is a safety function and it
cannot be disabled.
3.2.3
About the electronic gas adaptive system
calibration
The electronic gas adaptive system calibrates itself in pre-
determined intervals. First calibration takes place just after first
burner activation after each power ON. Calibration process duration
is around 60 seconds and the
icon blinks. After calibration is
ended, boiler modulates to required capacity. Calibration process
has no effect on boiler operation.
Calibration can also take place in summer mode without water
tapping if proper conditions are met. In other words, boiler may
operate itself for a short duration in summer mode even though there
is no domestic hot water demand. This is an expected behavior.
3.3
Basic usage
3.3.1
About the home screen
It is the screen that is displayed after activating the LCD screen with
one of the dials or buttons. You can use the home screen to read out
settings that are meant for daily use. What you can see on the home
screen depends on your system configuration.
The following home screens may be possible:
▪ Room temperature (Daikin room thermostat connected)
▪ Central heating set temperature
▪ Virtual room temperature (with outdoor sensor)
▪ Domestic hot water set temperature
▪ System pressure (at standby mode)
3.3.2
To select the operation mode
The operation mode can be changed by pressing the "Mode" button
(
).
(5 s)
(5 s)
a
c
b
d
e
a
Central heating only mode
b
Standby mode
c
Summer mode
d
Winter mode
e
Full-off mode
3.3.3
Possible operation modes
Operation mode
Description
Central heating only mode
▪ Only central heating operation mode
is enabled.
▪ The central heating temperature
setpoint (which setpoint is shown
depends
on
the
system
configuration; see
6]) and the
icon is
shown on the home screen.
▪ The icon blinks if central heating
operation is active.
Standby mode
▪ Both central heating and domestic
hot water operation modes are
disabled.
▪ The protection functions such as
frost protection are still active at
standby mode.
▪ The home screen shows the system
pressure, as well as the icon.
Summer mode
▪ Only domestic hot water operation
mode is enabled. Central heating
operation mode is disabled. The
boiler will only produce heat for
domestic hot water.
▪ The domestic hot water setpoint,
and the
icon is shown on the
home screen.
▪ The
icon blinks if domestic hot
water operation is active.
Winter mode
▪ Both domestic hot water operation
mode and central heating operation
mode are enabled. The boiler can
produce domestic hot water, as well
as produce heat for central heating.
▪ The central heating temperature
setpoint (which setpoint is shown
depends
on
the
system
configuration; see
6]), and the
icon, as
well as the icon are shown on the
home screen. When domestic hot
water operation is active, domestic
hot water setpoint is shown on the
home screen.
▪ The
icon blinks if domestic hot
water operation is active.
▪ The icon blinks if central heating
operation is active.
Full-off mode
▪ Both central heating and domestic
hot water operation modes are
disabled.
▪ LCD display will be darkened and
will not be activated with any user
interaction.
▪ The protection functions such as
frost protection are still active at full-
off mode.
▪ Full-off mode is activated and
deactivated if "Mode" button is
pressed for 5 seconds while boiler is
in any mode.
