CLEAN BURN CB-500 series Operator'S Manual Download Page 86

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Operator's Manual: Models CB-1500 & CB-2500 (230V / 50 Hz)

9-6

Cleaning Ash From the Furnace (continued)

Ensure that power has been turned OFF, and all "hot" components have been allowed to cool
sufficiently.

(Allow at least one hour for the Energy Retention Disc to cool.)

Clean the ash from the stack components:
a. Brush accumulated ash from the stack cap.
b. Lightly tap the stack components to loosen the ash.
c. Allow ash and dust to settle in the elbow on the stack.

NOTE:

It is not necessary to remove the stack to clean it. You will vacuum ash from the

stack elbow as you clean out the back of the furnace as described below.

d. Remove the clean-out cap from the unused furnace breach.
e. Thoroughly vacuum out the back of the furnace, including the stack elbow, through the

clean-out breach. A long wand on the hose of your shop vac is helpful in reaching all the
way through the back of the furnace to the stack elbow.

Clean the ash from the combustion chamber (see Figure 9D):
a. Bleed down pressure on the air and oil lines by slightly loosening the fittings at the bottom of

the connector block.

NOTE:

Turn off the shut-off on the air pressure line.

b. With air and oil pressure completely bled off, disconnect the air and oil pressure lines from

the bottom of the connector block.

NOTE:

Cover the lines to keep dirt from entering the air / oil supply.

c. Remove the lock-down nuts on the clean-out door.
d. Carefully swing open the clean-out door to expose the heat exchanger flues and the combustion

chamber. Carefully remove the Energy Retenton Disc with a long handle or pipe. Lightly vacuum
the Energy Retention Disc.

e. Check the color of the ash--it should be light gray or tan.

ATTENTION:

White ash indicates excessive air pressure. Black ash or soot indicates lack of

combustion air. If these conditions exist, call your Clean Burn dealer. DO NOT overfire your
furnace by turning up the compressed air. Overfiring will damage the combustion chamber and heat
exchanger.

f. Vacuum the ash from the combustion chamber and the flues.

ATTENTION:

When cleaning the combustion chamber, ensure that you do not gouge or

damage the refractory material on the inside of the clean-out door.

NOTE:

Avoid "packing" the ash in the tubes by first vacuuming the flues before pushing

the flue brush down the flues. DO NOT bump or bend burner components while cleaning the
combustion chamber.

g. Use a flue brush to thoroughly clean the flues.
h. Thoroughly vacuum any remaining ash residue from the flues. Make sure the back (at the

breach) is still clean.

i. Check the flues for rust.

ATTENTION:

The presence of rust in the flues indicates that chlorinated materials are

being burned. Burning chlorinated materials will severely damage your heat exchanger. Contact
your Clean Burn dealer for instructions to test your oil for chlorine contamination before firing your
furnace.

j. Inspect the inside of the clean-out door. Make sure the refractory material on the inside of

the clean-out door is in good condition and the clean-out door seals tightly when closed. If
the door does not seal tightly, replace any damaged components.