A.O. Smith Copper Boiler DW-1810

Is the circulating pump properly sized for the application?

Oil the three oil cups as instructed on the oil tube supplied with the unit

Add 2 or 3 teaspoonfuls of No. 20 non-detergent motor oil in bearing oil cups

Add 10 or 12 drops of No. 20 non-detergent motor oil in motor oil cups

Was the lubrication process completed successfully?

Remove cover panel from far side of water connections

Expose the heat exchanger return bends

Remove return bends using a 9/16" deep socket ratchet

Inspect tubes to ensure they are free of scale and deposits

Remove deposits with a stiff wire brush or mechanical tube cleaner to bare metal

Ensure the circulating pump is properly sized for the application

Check water hardness and system pressure drop

Verify temperature rise across the boiler

Oil the three oil cups (2 on the motor, 1 on the pump) as instructed on the oil tube

Add 2 or 3 teaspoonfuls of No. 20 non-detergent motor oil in bearing oil cups

Add 10 or 12 drops of No. 20 non-detergent motor oil in motor oil cups

Ensure water softening equipment is operational

Is there a change of approximately 5°F in the normal temperature rise through the boiler?

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 necessary equipment is made of copper or brass

Shut off all electric to the unit

Disconnect pilot line connection at main burner