5 Commissioning
Installation manual
24
D2CND024A1/4AA + D2TND012~024A4AA
Wall-mounted condensing boiler
3P469346-3E – 2017.07
4
Measure system water height (see
"4.5 Central heating system
requirements" on page 10
).
5
Slowly turn the filling valve until pressure reaches a value
around 0.8 bar for system heights up to 6 metre. For longer
system
heights,
see
"4.5
Central
heating
system
requirements" on page 10
to determine filling pressure. Filling
operation should be done slowly. When pressure exceeds
0.8 bar, error code will disappear and the status indicator light
will turn to blue. Turn off the filling valve.
6
System pressure value can be monitored from the user
interface.
7
Make sure the automatic air vent valves located on the pump
and heat exchanger are opened. Vent the air from the
installation with the manual air vent screws on the radiators.
Make sure screws are tightened after venting.
a
a
Filling valve
8
If after the venting the pressure decreases below 0.8 bar, refill
the system with water until the pressure reaches 0.8 bar again.
9
Check the central heating circuit - especially the couplings of
the circuit - for leakage.
10
Isolate the unit from power mains.
4.10
Converting for use with a different
type of gas
WARNING
Gas conversion operation can only be carried out by
qualified competent persons.
DANGER
Isolate the boiler from the power mains before gas
conversion operation.
4.10.1
To convert the system for use with a
different type of gas
1
Open the front cover of the unit as described in this manual.
2
To set natural gas, adjust screw on the gas valve to position "1".
3
To set LPG, adjust the screw to position "2".
4
Mount the front cover, connect the unit to the main power
supply.
4.10.2
To modify settings for gas conversion
1
Enter the menu section from the user interface. Select service
settings by using the left dial.
2
Press the "Enter" button and choose the password by using the
right dial and press the "Enter" button again.
3
Choose "C" parameters via left dial and press the "Enter"
button.
4
Choose "CE" and press the "Enter" button. It will ask for
password again. Choose the password and press the "Enter"
button.
5
Choose "C0" and press the "Enter" button.
6
To convert to LPG, choose "1" with the right dial and press the
"Enter" button, To convert to Natural gas, choose "0" with the
right dial and press the "Enter" button.
7
Leave the menu screen and go back to the home screen by
using the "Back" button.
INFORMATION
Only qualified persons have access to servicing
parameters. The passwords needed to access service
parameters are written in servicing instructions.
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 0.2 litres of water from the boiler
flue outlet.
Summary of Contents for D2TND012A4AA
Page 27: ......
