A.O. Smith 100 Series, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Agent
FIGURE 24. OPERATION SCREEN FIGURE 25. FIRING RATE PAGE
HIGH FIRING RATE SETTING
Set the boiler/water heater to the high firing rate by setting the High Firing Rate RPM as described below. Check combustion readings
using a combustion analyzer. If combustion readings are not in accordance with the chart below adjust the gas valve as follows:
remove the flat, round, blue plastic cap from the cover. For more information, refer to the Instruction Manual. Using a 3 mm (7/64”)
hex wrench, turn the adjustment screw counterclockwise to increase or clockwise to decrease gas flow and achieve the desired CO
2
level. Refer to the Table 7 for correct settings. There will be a slight time delay between the adjustment and the response of the CO
2
measuring instrument. Adjust the settings in small increments and allow the combustion readings to stabilize before readjusting.
When desired adjustments are complete, reinstall the blue plastic cap on the cover. Combustion samples should be taken in the stack
within two feet of the boiler/water heater. The carbon monoxide (CO) values in the combustion sample should not exceed 150 PPM
under any circumstances. Contact OEM for any abnormal conditions leading to excessive CO above 150 PPM.
TABLE 7. HIGH FIRE RATE SETTING
MODELS (XB/XW)
RPM
(APPROXIMATE FACTORY SET)
CO
2
*MANIFOLD PRESSURE
INCHES W.C (KPA)
NATURAL
GAS
PROPANE NATURAL
GAS
PROPANE NATURAL GAS PROPANE
1000 4450 4750 8.5 - 9.2% 9.3 - 10.2% -3.5 (-0.87) -4.7 (-1.17)
1300 4850 5100 8.5 - 9.2% 9.3 - 10.2% -3.0 (-0.75) -3.6 (-0.89)
1700 5700 5700 8.5 - 9.2% 9.3 - 10.2% -3.6 (-0.89) -4.4 (-1.09)
2000 4700 4750 8.5 - 9.2% 9.3 - 10.2% -3.9 (0.97) -4.9 (-1.22)
2600 5200 5100 8.5 - 9.2% 9.3 - 10.2% -3.3 (-0.82) -3.6 (-0.89)
3400 5700 5700 8.5 - 9.2% 9.3 - 10.2% -3.5 (-0.87) -4.4 (-1.09)