Perform regular maintenance

Step 4: Recheck smoke level. It should be Zero.

•This procedure provides a margin of reserve air to accommodate variable conditions.

•If the draft level has changed, recheck the smoke and CO2 levels and readjust the burner if necessary

4.Once combustion is set, tighten all fasteners on air band, air shutter and head adjusting plate or es- cutcheon plate.

5.Burner equipped with cover - Reinstall the cover and repeat Steps 2 and 4. If CO2 increases (O2 decreases), remove the cover and adjust the air setting so the CO2 (O2) with cover on meets re- quirements of Step 3.

6.Start and stop the burner several times to ensure satisfactory operation. Test the primary control and all other appliance safety controls to verify that they function according to the manufacturer’s speciﬁca- tions.

Perform regular maintenance

!WARNING Annual Professional Ser- vice Required

Tampering with or making incorrect adjustments could lead to equip- ment malfunction and result in asphyxiation, explosion or ﬁre.

yDO NOT TAMPER WITH THE UNIT OR CON- TROLS - CALL YOUR QUALIFIED SERVICE TECHNICIAN OR SERVICEMAN.

yTo ensure continued reliable operation, a quali- ﬁed service technician must service this burner annually.

yMore frequent service intervals may be required in dusty or adverse environments.

yOperation and adjustment of the burner requires technical training and skillful use of combustion test instruments and other test equipment.

Verify the nozzle is the one originally speciﬁed by the appliance manufacturer and replace the noz- zle with one having the exact speciﬁcations from the same manufacturer.

Clean and inspect the electrodes for damage, re- placing any that are cracked or chipped.

Check electrode tip settings. Replace electrodes if tips are rounded.

Inspect the igniter spring contacts. Clean or re- place if corroded.

Clean the cad cell grid surface, if necessary.

Make sure Low Firing Rate Bafﬂe is in place if required for the burner application. Omitting the bafﬂe can result in unacceptable burner combus- tion.

Inspect all gaskets. Replace any that are dam- aged or would fail to seal adequately.

Inspect the combustion head and air tube. Re- move any carbon or foreign matter. Replace all damaged units with exact parts.

Clean the blower wheel, air inlet, air guide, burner housing and static plate of any lint or foreign ma- terial.

If motor is not permanently lubricated, oil motor with a few drops of SAE 20 nondetergent oil at each oil hole. DO NOT over oil motor. Excessive oiling can cause motor failure.

Check motor current. The amp draw should not exceed the nameplate rating.

Check all wiring for secure connections or insula- tion breaks.

Check the pump pressure and cutoff function.

Check primary control safety lockout timing.

Check ignition system for proper operation.

Inspect the vent system and chimney for soot ac- cumulation or other restriction.

Clean all ﬂue passages and ﬂue pipe. Replace corroded or damaged pipes.

Clean the appliance thoroughly according to the manufacturer’s recommendations.

Check the burner performance. Refer to the sec- tion “Set combustion with test instruments”.

It is good practice to make a record of the service performed and the combustion test results.

Shutting the Burner Off

Replace the oil supply line ﬁlter. The line ﬁlter car- tridge must be replaced to avoid contamination of the fuel unit and nozzle.

Inspect the oil supply system. All ﬁttings should be leak-tight. The supply lines should be free of water, sludge and other restrictions.

Remove and clean the pump strainer if applica- ble.

!CAUTION IF THE BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF

TIME, ALWAYS KEEP THE VALVE SHUT OFF.

Turn off all electric power to the burner.

Note: There could be more than one disconnect switch.

Page 20

6104BAFG R0

UO-3 CV, UO-4 CV, UO-5 CV specifications

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