Bosch SSB1000 TL - Adjusting and Setting CO 2 Limits

SSB 6720866942 (2018/06) US
Installation | 23
The gas-air ratio must always be set on the basis of a CO2 or O2 reading
taken at maximum nominal output and minimum nominal output using an
electronic ue gas analyzer.
SWITCHING FROM NATURAL GAS TO LP
• Close the gas shutoff valve
• Disconnect the electric power supply from the boiler

WARNING: To avoid electrical shock, it is mandatory to
disconnect the boiler from the power supply using a service
disconnect external switch.
• Open the front panels
• Unscrew the swivel joint indicated in Fig. 27 to separate the valve
from the connection pipe with the fan
LP Orifice
Swivel joint
Fig. 27 Natural Gas to LP Gas Conversion
• Separating the two components, the hole where the gas passes with
its gasket can be accessed
Place the provided metal orice (Fig. 27) below the existing
gasket.
Boiler Model N° on orice
SSB 800 SA 10,5
SSB 1000 SA 9,5
SSB 1000 TL 9,5
• Tighten the swivel joint and leak test the converted boiler prior to
placing into operation.

WARNING: NEVER USE MATCHES, CANDLES, FLAMES
OR OTHER SOURCES OF IGNITION TO CHECK FOR
GAS LEAKS. Use very mild soap and rinse joints and piping
thoroughly after leak checks have been completed.
• Switch the main power supply to ON
• Press Menu button on Service display, select Settings, then Appliance
Conguration:
• Scroll to (98) Appliance Setting and modify the value according to the
table below;
Model Gas type
PARAMETER #98
SETTING
SSB 800 SA NG 13
SSB 800 SA LP 14
SSB 1000 SA / 1000 TL NG 15
SSB 1000 SA / 1000 TL LP 16
• Scroll down to Conguration Conrmed and change to Yes;
• Wait for Updating Appliance process completion, then move back to
the Home screen;
• Wait 20secs (at least) for data transfer to Main controller.
• Reopen the gas shut-off valve
• Adjust the CO
2 parameter as explained in next chapter
• Afx the gas type label from the gas conversion kit to the appliance,
as close as possible to existing rating label.
4.6.5 Adjusting and setting CO 2 limits
• Insert a combustion analyzer probe into the test port shown in Fig. 28
• Go to the Touchscreen and access the Module screen (as described on
“6.3.4 Module Screen” pag. 36) relevant to the module under analysis;
• Press “MODULE TEST” button;
• Press “HIGH POWER” button.
Wait 2 or 3 minutes to reach steady state conditions and record the CO
2
value.
Test port of
the module
Fig. 28 Test Port for Combustion Analysis (available on each module)
To adjust the CO2 value at the maximum power turn the screw “A” (rotate
counter-clockwise to increase CO
2) shown in Fig. 28, allen type wrench is
necessary for this adjustment.
Verify that the value of CO
2 is stable and is within the range indicated in
the following table (be careful to make small changes and conrm that the
value is stable before making additional adjustment).
Press “LOW POWER”: the fan will run at the minimum speed.
Screw “B” Screw “A”
Fig. 29 CO2 Adjustment
To adjust the CO
2 value at the minimum power turn the screw “B” (rotate
clockwise to increase CO
2) shown in Fig. 29.
Verify that the value of CO
2 is stable and is within the range indicated in
the following table (be careful to make small changes and conrm that the
value is stable before making additional adjustment).
Press “Reset” and the boiler returns to the “stand by” mode.
SSB Combustion Values
Gas Type Max. Fire CO
2% Min. Fire CO2%
Natural Gas 8.8 - 9.2 8.8 - 9.2
LP Gas 10.3 - 10.7 10.3 - 10.7