A.O. Smith Copper Boiler DB-1350

Ensure all appliances remain connected to the common existing system

Seal any unused openings in the common venting system

Visually inspect the venting system for proper size and horizontal pitch

Check for blockage, restriction, leakage, corrosion, and other deficiencies

Close all building doors and windows

Close all doors between the appliance space and other spaces

Turn on clothes dryers and any appliance not connected to the common venting system

Shut off all gas and electric to unit

Disconnect union assembly and pilot line connection at main burner

Slide burner tray out of cabinet

Check that burner venturi and ports are free of foreign matter

Clean burners with bristle brush and/or vacuum cleaner 3/4"

Ensure burner ports or pilot location are not distorted

Ensure water softening equipment is operational

Has the water temperature increased by approximately 5°F?

Inspect the interior of the inlet/outlet manifold through the pressure relief valve tapping for lime build-up

Obtain UN•LIME from dealer or distributor

Read the instructions on the label of the UN•LIME container

Ensure all valves, pipes, and fittings between gate valves 'A' and 'B' and the boiler are made of copper or brass

Attach a pressure gauge or a manometer to the gauge port and check for correct manifold pressure.

Is the pressure within the limit indicated on the rating plate?

Ensure all other gas consuming appliances are turned off.

Enter the time in seconds to burn one cubic foot of gas (T).

Enter the gas heating value in Btu per cubic foot of gas (H).

Calculate the actual boiler input per hour (Btuh) using the formula (3600/T)xH.

Main Burner Flame Characteristics Check

Verify main burner flame characteristics

Are all burner characteristics evident?

Describe any issues with burner characteristics

Check for accumulation of lint or other foreign material