PB Heat Gas/Oil Boilers manual Starting The Boiler, A.Check The Piping, B.Fill The Boiler

STARTING THE BOILER

9. STARTING THE BOILER

A.CHECK THE PIPING

1.Water Piping

a)The Boiler must have been hydrostatically tested.

b)Check the attached piping for joint tightness.

c)Continue monitoring as you proceed through start up.

2.Gas Piping

a)Make sure the gas system piping and the connections to the boiler Gas Control Train(s) have been leak tested.

b)After the boiler is in operation, check the tightness of all joints in the boiler gas piping with a soap suds solution.

c)Purge the gas piping of all air up to the boiler Gas Control Train.

3.Oil Piping

a)Check the oil piping visually. Make sure all joints are tight.

b)When the burner is firing, check the suction line and return line pressures.

c)If the pressure exceeds the allowable pressure in the Burner Manual or if the suction line vacuum is higher than allowable, correct the piping as needed to bring the suction line and return line pressures within acceptable range.

d)Excess pressure can cause pump seal failures. Excess vacuum will cause fuel flow problems with the burner oil pump.

B.FILL THE BOILER

1.Fill the boiler and system.

a)Fill the system with fresh water only. If the water hardness is high, use water treatment to reduce the deposition of minerals in the boiler.

CAUTION

Check the system for leaks and make sure the automatic fill valve (if used) and the expansion tank are operating correctly. Leakage or weeping of the relief valve will cause make-up water to be added to the system. Excessive make-up water will damage the boiler and system components due to liming and oxygen corrosion.

b)If the system requires antifreeze, use only antifreeze designed for hydronic systems. These contain inhibitors to prevent corrosion of the boiler and system components. Do not use ethylene glycol or automotive antifreezes.

•Make sure the antifreeze supplier can provide periodic inhibitor check service.

•If automatic fill is used, the system will have to be checked periodically to make sure the antifreeze concentration has not been diluted below design level.

•Local codes may require the use of a backflow preventer or manual fill only with separation from the city supply.

•Consider the minimum temperature of potential exposure for the system when deciding on the antifreeze concentration. A concentration of 50% generally provides protection from freezing down to -30°F.

CAUTION

The boiler gaskets will be damaged by petroleum or its derivatives.

Do not use petroleum based compounds in the boiler, including petroleum-based stop-leak compounds.

2.Purge the air from the system.

C.RUN BURNER CHECK-OUT

1.Before firing the burner, slide the Slide Gate Damper on the rear flue box all the way down (full open) on LC’s or open the LCE Draft Damper until the handle is parallel to the vent pipe (full open).

2.Follow the instructions in the Burner Manual for starting the burner, adjusting air openings and fuel rates. Perform ignition system and flame supervisory control test and checkout as described in the manual.

3.After burner is set at rate, close the damper until the pressure reading at the test opening in the rear flue box or draft damper is between 0" wc and 0.1" wc positive. See Table 9.1 for typical overfire pressure (measured at the burner front plate) and boiler draft loss.

When a barometric draft regulator is installed in the venting system, adjust the boiler damper for 0" wc pressure reading at the damper. Adjust the draft regulator for -0.05" wc draft between the boiler damper and the draft regulator.

CAUTION

On installations with high draft, do not leave the boiler with a negative draft reading at the rear flue box or draft damper. High negative draft can pull the flame up into the boiler crown sheet and overheat the iron. This can result in cracked sections or shortened boiler life.

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