Start-up 9
0020300877_01 Energy
7
Installation and maintenance instructions
33
9.10.2 Checking the gas connection pressure (gas
flow pressure)
1
2
1.
Ensure that the gas inlet working pressure can be
obtained with all other gas appliances in the property
working.
2.
Close the gas stopcock
(1)
.
3.
Undo the sealing screw on the test nipple
(2)
.
4.
Connect a manometer to the test nipple
(2)
.
5.
Open the gas stopcock
(1)
.
6.
Start up the product with check programme
P.01
(sys-
tem with eBUS control) or
P.03
(installation without
eBUS control).
7.
In addition, ensure that maximum heat can be dissip-
ated into the heating system by turning up the room
thermostat.
8.
With the boiler operating at full load check that the gas
inlet working pressure at the reference test point
(2)
complies with the requirements.
Permissible gas flow pressure for operation with
Natural gas H
1.3 to 2.3 kPa
(13.0 to 23.0 mbar)
9.
Should the pressure recorded at the reference test point
in the boiler be lower than indicated check if there is
any blockage in the pipework or if the pipework is un-
dersized.
Condition
: Gas flow pressure
not
in the permissible range
Caution.
Risk of material damage and operating
faults caused by incorrect gas connec-
tion pressure.
If the gas connection pressure lies outside
the permissible range, this can cause oper-
ating faults in and damage to the product.
▶
Do not make any adjustments to the
product.
▶
Do not start up the product.
▶
If you cannot correct the failure, notify the gas supply
company and proceed as follows:
▶
End check programme P.01.
▶
Allow the boiler to cool down by allowing pump overrun
to operate for a minimum of two minutes.
▶
Close the gas stopcock.
▶
Remove the pressure gauge and retighten the sealing
screw
(2)
for the measuring nipple.
▶
Open the gas stopcock
(1)
.
▶
Check the test nipple for gas tightness.
▶
Close the gas stopcock
(1)
.
▶
Install the front casing.
▶
Disconnect the product from the electrical installation.
▶
You must not start up the boiler.
Condition
: Gas flow pressure
in the
permissible range
▶
End the check programme
P.01
.
▶
Allow the boiler to cool down allowing pump overrun to
operate for a minimum of two minutes.
▶
Close the gas stopcock
(1)
.
▶
Remove the pressure gauge and retighten the sealing
screw
(2)
for the measuring nipple.
▶
Open the gas stopcock
(1)
.
▶
Check the test nipple for gas tightness.
▶
Install the front casing.
▶
Reset boiler controls for normal operation.
▶
Record the appliance gas inlet working pressure (kPa
resp. mbar) in the Benchmark gas boiler commissioning
checklist.
9.10.3 Checking the air/flue pipe/flue gas
recirculation
1.
Check the flue gas installation is intact in accordance
with the latest gas safe technical bulletin and informa-
tion supplied in the installation instructions.
2.
For extended flue gas installations check for flue gas
recirculation using the air analysis point.
3.
Use a flue gas analyser.
4.
If you discover unusual levels of CO or CO
2
in the sup-
ply air, search for the leak in the flue system or for signs
of flue gas recirculation.
5.
Eliminate the damage properly.
6.
Check again whether the supply air contains any un-
usual levels of CO or CO
2
.
7.
If you cannot eliminate the damage, do not start up the
product.
9.10.4 Checking the CO
₂
content
1.
Start up the product with the check programme
(P.01)
and set the value.
–
Setting value for the programme P.01: 100
Check programmes
–
Overview (
2.
Wait until the value that is read is stable.
–
Waiting period for reading a stable value: 5 min
1
3.
Unscrew the cover from the flue gas analysis point
(1)
.
4.
Measure the CO
₂
content at the flue gas analysis point
(1)
.
5.
Compare the measured value with the corresponding
value in the table.
