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Bosch Greentherm T9900 SE 160 Installation And Operating Instructions Manual page 64

Indoor residential tankless water heaters, 160 000/199 000 btu- natural gas 160 000/199 000 btu - liquefied petroleum lp gas
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B1 Internal Adjust
▶ Touch symbols
Fig. 62
B1 Internal Adjust - P1 Active
▶ Touch the symbol
B1 Internal Adjust will start automatically.
▶ Wait approximately 60 seconds until a green check mark
appears in the display, which indicates that the B1 Internal
Adjust is completed. Do not interfere with the appliance
during this period.
Fig. 63
B1 Internal adjust is completed
L2 Gas Adjust
▶ Touch the symbol
L2 Gas Adjust value is shown (ionization).
▶ Change L2 Gas Adjust parameter until ION value is
according to table 26.
1) B1 Internal Adjust will calculate automatically the amount
of air in low fire (P2). This method uses P1 values to start
until display shows B1 Internal
to enter B1 Internal Adjust.
to enter L2 Gas Adjust.
▶ Increase L2 Gas Adjust parameter to increase ION value
and vice-versa.
Fig. 64
L2 Gas Adjust - ION value
▶ Touch the symbol
▶ Touch the symbol
Minimum power adjust is completed.
L2 Gas Adjust
ION (L2 Gas Adjust)
ION (L2 Gas Adjust)
1) For information on unit's configuration (gas type: NG/LPG
and capacity: 160 000BTU/199 000BTU), see rating plate
(chapter 3.3).
Table 26 L2 ION values
Gas and Air adjustment is complete.
8.12.3 Restore factory values
To restore factory values for combustion settings,
▶ Proceed with the following steps.
To enter P1 and P2 menu,
▶ Access to AU Technical Settings menu.
▶ Touch symbols
Display shows CA Combustion Adjust.
▶ Touch the symbol
▶ Touch symbols
▶ Touch the symbol
Reset Parameters P1
After enter MA - Manual Adjust,
▶ Access to menu P1.
Greentherm T9900 SE/i – 6 720 813 635 (2019/03)
L2 Gas
to save value.
to return to the main menu.
199 000 BTU
Natural Gas
125 - 160
LP Gas
150 - 180
to select CA menu.
to enter CA menu.
to select MA - Manual Adjust
to enter P1 or P2 menu.
160 000 BTU
100 - 130
100 - 135



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Greentherm t9900 se 199Greentherm t9900 se/i 199