5 Commissioning
Installation manual
24
D2C20ND0 D2C24ND035A5AA
Wall-mounted condensing boiler
3P469346-10J – 2018.05
5
Commissioning
WARNING
Only qualified persons should conduct commissioning.
CAUTION
Preliminary electrical system checks such as earth
continuity, polarity, resistance to earth and short circuit
must be carried out by using a suitable test meter by a
competent person.
5.1
To fill the condensate trap
INFORMATION
Water must be poured into the
inner
tube.
Fill the condensate trap by pouring 0.3 litres of water from the boiler
flue outlet.
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
