7
x
Gas burner
ROTEX GCU compact -
41
8. Connect the flue gas analysis unit.
9. Check flow pressure.
Î
The gas inlet flow pressure must not fall essentially below
the idle pressure minus the pressure loss in the gas con-
nection hose (see tab. 12-5). If the flow pressure is too
low, the burner output also drops.
10. If the measured flue gas values do not change anymore (for
the soonest
2 min
after the start of the burner), measure the
CO
2
-content and the O
2
-content. Compare the measured
values with the specified setting values (see section 7.3.1).
a) If the O
2
/CO
2
concentrations lie within the permissible
values:
Î
No further measures are required.
b) If the O
2
/CO
2
concentrations lie outside the permissible
values:
Î
Carry out 100 % calibration and adjust the [Drop Io-base]
in such a way that the setting range is reached, see
section 7.3.4 and repeat the measurement.
11. In the programme [Emission Measurement] choose the
setting
[Base Load]
,
but do not confirm
.
12. If the measured flue gas values do not change anymore (for
the soonest
2 min
after the start of the burner), measure the
CO
2
-content and the O
2
-content. Compare the measured
values with the specified setting values (see section 7.3.1).
a) If the O
2
/CO
2
concentrations lie within the permissible
values:
Î
No further measures are required.
b) If the O
2
/CO
2
concentrations lie outside the permissible
values:
Î
Carry out 100 % calibration and adjust the [Drop Io-base]
in such a way that the setting range is reached, see
section 7.3.4 and repeat the measurement.
Changeover from natural gas to liquid gas
1. Turn the setting screw Gas/Air mix (fig. 4-32, item 3.1) to
Position 2.
2. Change the gas type in the RoCon BF Control as follows:
Ɣ
Place the rotary switch in the
"Configuration"
position.
Î
An overview is displayed.
Ɣ
Select the
"SCOT config"
level with the rotary switch.
Î
An overview is displayed.
Ɣ
Using the rotary switch, select the parameter [Gas type]
and confirm.
Ɣ
Using the rotary switch, select the "Liquid gas" value.
Ɣ
Confirm the changes with a brief push of the rotary switch.
Î
Change has been accepted. Jump back to previous dis-
play.
3. Enter the gas type changeover on the setting type plate and
in the operating instructions and confirm with your signature.
4. Affix a device sticker for the gas conversion onto the burner
housing.
5. Carry out commissioning as per chapter 5.1.3. In the event of
starting problems, see section 7.3.4.
More detailed explanations and possible setting values for these parameters can be
found in the operating instructions "ROTEX RoCon BF Control".
Resetting from Liquid petroleum gas to natural gas
1. Turn the setting screw Gas/Air mix (fig. 4-32, item 3.1) to
Position 1.
2. Change the gas type in the RoCon BF Control as follows:
Ɣ
Place the rotary switch in the
"Configuration"
position.
Î
An overview is displayed.
Ɣ
Select the
"SCOT config"
level with the rotary switch.
Î
An overview is displayed.
Ɣ
Using the rotary switch, select the parameter [Gas type]
and confirm.
Ɣ
Using the rotary switch, select the "Natural gas" value.
Ɣ
Confirm the changes with a brief push of the rotary switch.
Î
Change has been accepted. Jump back to previous dis-
play.
3. Enter the gas type changeover on the setting type plate and
in the operating instructions and confirm with your signature.
4. Affix a device sticker for the gas conversion onto the burner
housing.
5. Carry out commissioning as per chapter 5.1.3. In the event of
starting problems, see section 7.3.4.
More detailed explanations and possible setting values for these parameters can be
found in the operating instructions "ROTEX RoCon BF Control".
7.3.4 Starting problems - calibrate the firing unit,
starting output burner blower and setting the
gas volume
The factory-set starting output usually provides a problem-free,
quiet burner start.
The starting output of the burner blower is factory-set.
If during the starting process an obvious deflagration or whistling
sound occur, or several starting attempts are necessary on a
regular basis, a slight change in the starting output may remedy
the occurrences.
Î
For deflagrations: Reduce the starting output or gas vol-
ume.
Î
In the event of difficulties starting such as burner whistling
or flame formation: Increase the starting output or gas vol-
ume.
ROTEX recommends the following procedure for rectifying
general starting problems
:
Air inlet collecting pipe (fig. 7-2, item 12) must be
inserted into the Venturi nozzle (fig. 7-2, item 13).
In the event of starting problems, the starting output of
the burner blower can be changed by the heating
expert and the firing unit can be re-calibrated automat-
ically.
More detailed explanations and possible setting values
can be found in the operating instructions "ROTEX
RoCon BF Control". This documentation is included in
the scope of delivery.
