37
Service Manual
Measure the exhaust gas in chimney
sweep mode after 5 minutes.
Table: Recommended CO
2
content TGB(K)-20/GB-20(-S)
Table: Recommended CO
2
content TGB-11
When adjusting, parameter 4 must be set on
maximum heating power.
-
Correct the CO
2
content using the gas flow screw
on the gas combination valve as needed by turning
in small increments (1/4 turn).
• Turn to the right - CO2 content is decreased
• Turn to the left - CO2 content is increased
Gas flow screw
Zero-point
screw
TGB-20 / TGB-K-20/GB-20(-S)
Natural gas E/LL
Liquified petroleum gas B/P
9,0% ±0,2%
10,2% ± 0,2%
TGB-11
Natural gas E/LL
Liquified gas P
9,2% ±0,2%
10,9% ± 0,2%
• If VC 40 appears, then vent again.
Close the service cock for this, disconnect the
pump plug and reconnect it several times.
Perform intake air test
If CO
2
> 0.2% then check LA for leaks.