Buderus Logano plus GB402 Installation And Maintenance Instructions For Contractors page 29

▶ Insert the test sensor through the test port ( Fig. 36, page 29) in
the flue into the core flow and check the CO
▶ In the case of CO values below 9.0% or above 9.6%, correct the
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setting on the partial load adjusting screw [1] to 9.3%.
– Turning clockwise will reduce the CO
– Turning anticlockwise increases CO
▶ Check CO content again and enter the value into the commissioning
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report, Chapter 7.18 ( page 31).
Fig. 34 Checking the setting under partial load
7.10.3 Checking the CO setting under full load (70-80 %)
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▶ Press to increase the boiler output in percent.
▶ Read off load at the RC35 or via the service key.
▶ Wait until 70-80 % of the load is reached.
▶ Check the CO content again ( Chapter 7.10.1, page 28).
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▶ Check the CO content again and enter the value into the
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commissioning report ( Chapter 7.18, page 31).
Fig. 35 Accessing full load at the BC10
7.11 Switching the status display on the BC 10 to show the
boiler temperature status
▶ Press to change to the next status display.
The current operating pressure P1.7 is displayed.
▶ Press to change to the next status display.
Operating status 0Y (display code) is shown.
▶ Press to change to the next status display.
The boiler temperature is displayed.
Logano plus GB402 – 6 720 820 700 (2018/01)
content.
2
level.
2
.
2
7.12 Returning to operating mode from the flue gas test
▶ Press to terminate the flue gas test.
▶ Return to operating mode on the RC35.
▶ Close the flap on the RC35.
▶ If the boiler is designed for operation with the Logamatic 4000
control system, remove the RC35 again. Start the Logamatic 4000
control system.
7.13 Recording actual values
▶ Carry out the following tests at a test point in the boiler flue
connection and enter the results in the commissioning report
( Chapter 7.18, page 31):
– Feed pressure
– Flue gas temperature
tA
– Air temperature t
L
– Net flue gas temperature t
– Carbon dioxide content (CO
– CO value
Fig. 36 Recording actual values
[1] Position of the test port in the flue
7.13.1 Feed pressure
The required draught for the installed flue gas/ventilation air system
must not exceed 100 Pa (1.0 mbar).
DANGER: Risk to life through toxic flue gases escaping.
▶ Only operate the boiler with a chimney or flue system
( table 4, page 9).
7.13.2 Negative pressure in the supply air duct in open-flue mode
ITo verify correct sizing or to detect soiling in the supply air duct, carry
out a negative pressure measurement at the boiler inlet.
The negative pressure must not be greater than 25 Pa (0.25 mbar) when
measured at partial load.
7.13.3 CO value
CO values in an air-free state must be below 400 ppm or 0.04% vol.
Values above 100 ppm indicate and incorrect burner adjustment,
incorrect appliance setup, burner and/or heat exchanger contamination
or burner faults.
▶ Identify and eliminate the cause.
Start up the heating system
- t
A L
) or oxygen content (O )
2 2
7
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