CAUTION: Never leave the job with yellow burning flames. This condition indicated poor combustion and will quickly carbonize the boiler, reducing efficiency and boiler life. It may also be an indication of improper venting or combustion air supply. If unable to adjust flame properly, consult your local utility.
5.Boilers are shipped from the factory with the primary air shutters on the main burner wide open. It is recommended these air shutters be left in the wide open position unless there is lifting of the flame above the burner ports. If there is lifting, the air shutters should be gradually closed until the lifting is eliminated. it may also be necessary to adjust the primary air shutters if the input rate is reduced by a change in the orifices.
6.After burner has been in operation for about 10 minutes, check gas input rate to boiler as follows:
a.Make sure all appliances served by the meter are turned off during timing of gas input rate to the boiler.
b.Measure the time in seconds that it takes for the boiler to use 10 cubic feet of gas. Divide 36,000 by the number of seconds (this is the number of cubic feet of gas used per hour). Multiply this figure by the heating value of the gas to obtain Btu input per hour.
Example: A
2 minutes = 120 seconds.
36,000 X 1000 = 300,000 Btu/hr
120
Therefore, the boiler input is correct.
NOTE: Before calculating the input of the heating equipment, obtain the heating value of the gas from the local utility.
7.If input needs to be corrected, adjust combination gas valve pressure regulator. (Regulator is factory set at 3- 1/2" W.C. for natural gas and 10" W.C. for propane.) Turn adjusting screw clockwise to increase gas flow (increase input). Turn adjusting screw counterclockwise to decrease gas flow (decrease input). In no case should final manifold pressure setting vary more than + .3" from
8.Gas burner orifices supplied with boiler have been carefully designed to provide correct gas input rate for most gas conditions typically found in the U.S. and
Canada. Occasionally, however, local gas characteristics may not allow unit to be properly adjusted for input. If this is the case, local utility or Smith may recommend orifices be changed. When changing orifices follow the procedures detailed in Section 4 of this manual.
9.Start and stop burners several times by raising and lowering the thermostat setting.
10.After boiler has been firing long enough to raise boiler pressure above minimum setting of the primary pressuretol limit, check limit by turning its setting from maximum to minimum setting. This should turn boiler off. Return limit to desired setting.
11.Check boiler safety shutoff controls.
a.For boilers with standing pilot, with boiler firing, disconnect thermocouple lead from the valve. The valve should close.
b.For boilers with intermittent pilot, with boiler firing, disconnect wire connected to the "PV" terminal on the Honeywell S8600 control. The gas valve should close.
12.On initial
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