Start-up 7
0020134823_04 ecoTEC plus Installation and maintenance instructions
23
–
Permissible gas flow pressure for operation with
G20 natural gas: 1.6 … 2.3 kPa (16.0 … 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.
Conditions
: Gas flow pressure
not
in the permissible range
Caution.
Risk of material damage and operating
faults caused by incorrect gas flow pres-
sure.
If the gas flow pressure lies outside the per-
missible range, this can cause operating
faults in and damage to the product.
▶
Do not make any adjustments to the
product.
▶
Check the gas installation.
▶
Do not start up the product.
▶
If you cannot correct the failure, notify the gas supply
company and proceed as follows:
▶
End the 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 isolator cock.
▶
Remove the pressure gauge and retighten the sealing
screw
(1)
for the measuring nipple.
▶
Open the gas isolator cock.
▶
Check the measuring nipple for gas tightness.
▶
Close the gas isolator cock.
▶
Install the front casing. (
→
Page 10)
▶
Disconnect the product from the power mains.
▶
You must not start up the boiler.
Conditions
: 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 isolator cock.
▶
Remove the pressure gauge and retighten the sealing
screw
(1)
for the measuring nipple.
▶
Open the gas isolator cock.
▶
Check the measuring nipple for gas tightness.
▶
Install the front casing. (
→
Page 10)
▶
Reset boiler controls for normal operation.
▶
Record the appliance gas inlet working pressure (kPa
resp. mbar) in the Benchmark gas boiler commissioning
checklist.
7.14.5 Checking the CO
₂
content and, if
necessary, adjusting it (air index setting)
1.
Start up the product with the check programme
P.01
.
2.
Wait at least five minutes until the product reaches its
operating temperature.
1
3.
Measure the CO
₂
and CO/CO
₂
content at the flue gas
analysis point
(1)
.
4.
Compare the measured values with the corresponding
values in the table.
Settings
Unit
G 20
natural
gas
CO
₂
after 5 minutes
in full load mode
with front casing
closed
Vol.
–
%
9.0
±
1.0
CO
₂
after 5 minutes
in full load mode
with front casing
removed
Vol.
–
%
8.8
±
1.0
Set for Wobbe index
W
s
kWh/m
³
15.0
O
₂
after 5 minutes
in full load mode
with front casing
closed
Vol.
–
%
4.89
±
1.80
CO content
ppm
≤
250
CO/CO
2
content
0.0028
