5 Commissioning
Installation manual
25
D2CND024A1/4AA + D2TND012~024A4AA
Wall-mounted condensing boiler
3P469346-3E – 2017.07
5.2
Gas-air ratio: No need to adjust
The installer does not have to adjust the gas-air ratio, because the
boiler has an electronic gas adaptive feature.
5.3
To check for gas leakage
DANGER
Before passing next steps, this control must be fulfilled.
1
Before connecting the unit to power mains, close valves 1, 2
and 3.
2
Connect a manometer to gas counter.
3
Open valves 1, 2 and 3.
4
Close valve 1.
5
Note the manometer measurement and wait for 10 minutes.
6
After 10 minutes, compare the manometer measurement with
the initial value. If the pressure is decreased, it means there is
gas leakage. Check the gas line and fittings.
7
Repeat this process until being sure that there is no leakage.
8
Close valve 1, remove the manometer and open valve 1 again.
1
2
3
5.4
To commission the unit
Legend - User interface:
a
e
f
g
c
b
d
a
Left dial
b
LCD screen
c
Right dial
d
Mode / Reset
e
Status indicator
f
Cancel / Back
g
Menu / Enter
1
Make sure the system is filled with water and fully vented as
described in this manual.
2
Check that the central heating and domestic hot water isolating
valves are open.
3
Check that gas service valve is open.
4
Connect the unit to the main power supply. The user interface
will be energised.
5.4.1
To commission the central heating
1
Set mode to winter mode via "Mode" button on the user
interface. ( and icons are displayed on the screen.)
2
Set central heating set temperature to maximum value via left
dial. If connected, make sure all external controls such as
outdoor sensor and room thermostat are calling for heat.
3
The boiler control now go through its ignition sequence. The
status indicator will glow constantly in blue if flame is
established. icon will blink when central heating is active.
INFORMATION
After first power ON, the boiler does not increase its
capacity above a preset value for about 12 minutes, even if
there is demand.
▪ First 0~2 minutes: The electronic gas adaptive system
calibrates itself.
▪ Next 8~10 minutes: The boiler performs the low water
temperature function. You can skip this function by
pressing the "Cancel" button for 5 seconds.
4
Press "Cancel" and "Menu" buttons together 5 seconds to
activate the sweeper mode. With sweeper mode, boiler can be
operated at maximum and minimum capacity independent of
heat demand.
5
"tst - 100" caption will appear on the screen. This means boiler
is operating at nominal capacity. Check nominal capacity
operation.
6
To quit sweeper mode, again press "Cancel" and "Menu"
buttons together five seconds. Sweeper mode will be
deactivated and boiler will return to normal operation mode.
Sweeper mode also finishes automatically after 15 minutes.
Содержание D2TND012A4AA
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