9 Start-up
32
Installation and maintenance instructions Energy
7
0020300877_01
9.5
Checking the gas type
Make sure that the product is set up correctly by checking
the gas type. This ensures optimum combustion quality.
▶
Check the gas type as part of routine product mainten-
ance work when replacing components or carrying out
work on the gas route.
9.6
Checking the factory setting
The product's combustion has been factory tested and is
preset for operation with the gas group indicated on the data
plate.
The product is only authorised to be operated with natural
gas.
▶
Check the information about the gas type indicated on
the data plate and compare this with the gas type avail-
able at the installation site.
Condition
: The product design
is not compatible
with the local gas group
▶
Do not start up the product.
Condition
: The product design
is compatible
with the local gas group
▶
Proceed as described below.
9.7
Avoiding danger arising from insufficient
water pressure
The filling pressure must be between 0.10 and 0.15 MPa
(1.0 and 1.5 bar).
Note
If the heating flow temperature is shown in the
display, press and hold the
and
buttons at
the same time for longer than five seconds, or
temporarily deactivate heating mode in order to
display the pressure.
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering
the heating installation.
If the water pressure falls below 0.05 MPa (0.5 bar), the
value flashes in the display.
If the water pressure falls below 0.03 MPa (0.3 bar), the
product switches off. The display shows 0.0 MPa (0.0 bar).
Fault F22 will be stored in the fault list.
▶
Top up the water in the heating installation to start up the
product again.
◁
The pressure value flashes in the display until a
pressure of 0.05 MPa (0.5 bar) or higher has been
reached.
9.8
Switching on the product
▶
Switch on the product via the main switch installed on-
site.
9.9
Filling the heating installation
▶
Fill the heating installation with the maximum possible
volume flow.
9.10
Checking the gas setting
Only a qualified competent person is authorised to imple-
ment the settings on the gas valve assembly.
Each destroyed seal must be replaced.
The CO
₂
adjusting screw must be sealed.
Never modify the factory setting of the gas pressure regu-
lator of the gas valve assembly.
9.10.1 Checking the gas flow rate
The gas flow rate has been set during production and does
not require adjustment. With the front casing fitted check the
gas flow rate of the boiler as follows:
▶
Start up the product with the check programme
P.01
.
▶
In addition, ensure that maximum heat can be dissipated
into the heating system by turning up the room thermo-
stat.
▶
Wait at least 5 minutes until the boiler has reached its
operating temperature.
▶
Ensure that all other gas appliances in the property are
turned off.
▶
Measure the gas flow rate at the gas meter.
▶
Compare the measured values with the corresponding
values in the table.
Qnw from the data
plate
H gas in m
³
/h
Nom.
+5%
−
10%
15.3
1.62
1.70
1.46
18.4
1.95
2.05
1.76
24.7
2.61
2.74
2.35
25.7
2.72
2.86
2.45
28.6
3.03
3.18
2.73
30.6
3.24
3.40
2.92
35.7
3.78
3.97
3.40
Condition
: Gas flow rate not in the permissible range
▶
Check all of the piping and ensure that the gas flow rates
are correct.
▶
Only put the product into operation once the gas flow
rates have been corrected.
Condition
: Gas flow rate in the permissible range
▶
End the check programme
P.01
.
▶
Allow the boiler to cool down by allowing pump overrun to
operate for a minimum of 2 minutes.
▶
Record the boiler maximum gas flow rate onto the
Benchmark gas boiler commissioning checklist.
