Co2 Content, Natural Gas Type A (Minimum Output); Reading Off And Comparing Co2 Levels; Checking And Monitoring Co2 Level At Maximum Output; Recording Measured Values - Buderus Logano plus GB312 Installation And Service Instructions Manual

7
Placing the heating system in operation
7.12.1 CO content, natural gas type A (minimum output)
2
If CO content is below 9,0 % or above 9,5 %.
2
▶ Use the low-output adjusting screw to adjust the level to 9,1 % CO
– Turning the screw clockwise increases the CO
– Turning the screw counter-clockwise reduces the CO
7.12.2 Reading off and comparing CO
▶ After reading off the CO level or adjusting it on the Monitor readings/
2
Burner menu, read off the flame ionization current and compare with
the specified levels.
Fig. 46 Checking CO setting at medium output
2
[1] Low-output adjusting screwGas valve: Honeywell V4730C
[2] Cap screw
7.13 Checking and monitoring CO
output
▶ Press the button to increase the boiler output to a higher
percentage.
▶ Read off output on the RC35 or by means of the service keys.
▶ Wait until at least 70 % of the load is reached.
▶ Check CO content again.
2
▶ Read off flame ionization current (and compare with the specified
levels).
7.14

Recording measured values

▶ Take the following readings at a test point on the vent pipe and record
them in the commissioning report ( Section 7.20, page 39):

– Pressure differential

– Flue gas temperature t
A
– CO (O
2 level or oxygen content
– CO content (Carbon Monoxide)
36
level.
2
level.
2
levels
2
2
1
7 747 010 720-51.2RS
level at maximum
2
) (Carbon Dioxide)
2
.
2
Fig. 47 Recording measured values
[1] Recommended location for test point on vent pipe
7.14.1 Switching the status display on the BC10 to show the boiler
temperature
▶ Press the button to change the display to the next status.
The current operating pressure
▶ Press the button to change the display to the next status.
The operating status
▶ Press the button to change the display to the next status.
The boiler temperature is displayed.

7.14.2 Returning to operating mode from the flue gas test

▶ Press the button to cancel the flue gas test.
▶ Switch the RC35 back to the operating mode.
▶ Close the flap on the RC35.
▶ If the boiler is intended for operation with the Logamatic 4000
control system, remove the RC35 again.
▶ Switch on the Logamatic 4000 control system.
7.14.3 Pressure differential
The required pressure differential for the flue gas/air supply system
installed must not be greater than 0.4 inches W.C.
▶ If the pressure differential at maximum output is higher than 0.4
inches W.C., contact the flue system planner responsible and check
the calculations and design of the flue gas/air supply system.
DANGER: Risk of fatal injury due to poisoning by
escaping flue gas!
▶ Only operate the boiler in conjunction with a
connected and approved venting system.

7.14.4 CO content

The CO content in an air-free state must be below 400 ppm or 0.04% by
vol.
Levels above 100 ppm indicate incorrect burner adjustment, incorrect
appliance settings, dirt in the burner or heat exchanger or burner faults.
▶ Identify and eliminate the fault.
1
7 747 010 720-60.1RS
is displayed.
(display code) is displayed.
Logano plus GB312 – 6 720 806 273 (2013/01)