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The RoCon BF controller can be used to set the GCU compact to
the [Emissions measurement] function under [Full Load] and [Base
Load]. The flue gas values are checked with a flue gas analysis
device.
Auxiliary resources
▪ Flue gas analysis device.
▪ Pressure meter for measuring the gas pressure.
Checking and adjustment
Adhere to the following sequence!
1
Check that the burner is set to the correct gas type and correct
gas inlet pressure (see
also Chap.
2
Turn the screw in the gas inlet pressure measuring connection
(Fig.
4-43, item 3.3) anticlockwise by half a turn and attach the
measuring hose of the pressure meter.
3
Open the gas stopcock.
4
Measure the gas inlet pressure (idle pressure) and compare it
with the target value (see
Tab.
strument connected.
▪ If the gas inlet pressure (resting pressure) is outside the set
value range:
Inform your gas supply company or check the pressure reducer
(for liquid gas).
5
Open the heating valves.
6
Switch on GCU compact at the main switch.
7
Start the program [Emissions measurement] on the controller
RoCon BF of the GCU compact and select the [Full Load] set-
ting, but do not confirm.
INFORMATION
If the burner does not start, although the power and gas
supply are properly connected and the flue gas path is
free, the cause of this error must be found and rectified
(see Chap.
7.3.4).
8
Connect the flue gas analysis device to the test adapter for the
flue gas pipe.
9
Check the flow pressure. The gas inlet flow pressure must not
drop appreciably below the resting pressure minus the pressure
drop in the gas connection hose (see
sure is too low, the burner output also drops.
10 If the measured flue gas values do not change any more (at the
earliest 2 min after the start of the burner), measure the CO
and the O
contents. Compare the measured values with the
2
specified setting values
(see Chap.
▪ If the O
/CO
concentrations are within the permissible values:
2
2
No further measures required.
▪ If the O
/CO
concentrations are outside the permissible values:
2
2
Carry out 100 % calibration and set [Drop Io-base] so that the
setting range is reached (see
ment.
11 In the [Emissions measurement] program, choose the [Base
Load] setting, but do not confirm.
12 If the measured flue gas values do not change any more (at the
earliest 2 min after the start of the burner), measure the CO
and the O
contents. Compare the measured values with the
2
specified setting values
(see Chap.
▪ If the O
/CO
concentrations are within the permissible values:
2
2
No further measures required.
▪ If the O
/CO
concentrations are outside the permissible values:
2
2
Carry out 100 % calibration and set [Drop Io-base] so that the
setting range is reached (see
ment.
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
4.8.4).
12-9). Leave the measuring in-
Tab.
12-9). If the flow pres-
2
7.3.1).
Chap.
7.3.4) and repeat measure-
2
7.3.1).
Chap.
7.3.4) and repeat measure-
7
Heat cell with gas burner
Changeover from natural gas to liquid gas
1
Turn the gas/air mix setting screw
tion 2.
2
Change the gas type in the controller RoCon BF as follows:
▪ Rotary switch in "Configuration" position
An overview is displayed.
▪ Use the rotary switch to select the "Lambda-Gx" level.
An overview is displayed.
▪ Use the rotary switch to select the [Gas type] parameter and
confirm.
▪ Use the rotary switch to select the [Liquid gas] value.
▪ Confirm the changes with a brief push of the rotary switch.
Change has been accepted. Jump back to previous display.
3
Enter the gas type changeover on the settings type plate and in
the operating manual and confirm with your signature.
4
Affix a device sticker for the gas changeover on the burner hous-
ing.
5
Carry out commissioning in accordance with
event of problems when starting, see
More detailed explanations and possible setting values for these
parameters can be found in the "RoCon BF" controller operating in-
structions.
Resetting from liquid petroleum gas to natural gas
1
Turn the gas/air mix setting screw
tion 1.
2
Change the gas type in the controller RoCon BF as follows:
▪ Rotary switch in "Configuration" position
An overview is displayed.
▪ Use the rotary switch to select the "Lambda-Gx" level.
An overview is displayed.
▪ Use the rotary switch to select the [Gas type] parameter and
confirm.
▪ Use the rotary switch to select the [Natural gas] value.
▪ Confirm the changes with a brief push of the rotary switch.
Change has been accepted. Jump back to previous display.
3
Enter the gas type changeover on the settings type plate and in
the operating manual and confirm with your signature.
4
Affix a device sticker for the gas changeover on the burner hous-
ing.
5
Carry out commissioning in accordance with
event of problems when starting, see
More detailed explanations and possible setting values for these
parameters can be found in the "RoCon BF" controller operating in-
structions.
7.3.4
Starting problems – calibrating the
combustion control, setting the burner
blower starting output and gas volume
INFORMATION
In the event of starting problems, the starting output of the
burner blower can be changed by the heating technician
and the combustion control can be recalibrated automatic-
ally.
More detailed explanations and possible setting values can
be found in the "RoCon BF controller" operating instruc-
tions. This documentation is included in the scope of deliv-
ery.
(Fig.
4-43, item 3.1) to posi-
.
Chap.
5.1.3. In the
Chap.
7.3.4.
(Fig.
4-43, item 3.1) to posi-
.
Chap.
5.1.3. In the
Chap.
7.3.4.
Installation and operating instructions
47
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