Field Controls WML-C, MPL-B manual OIL Burner AIR Adjustment, Burner Electrodes, Start UP

Table A-4 Riello Balanced Flue (BF) Burner Set-Up

Riello Balanced Flue Series Oil Burners

(For use with sidewall vented units using outdoor combustion air)

Furnace

Model

Output BTU/Hr

Burner

Model

Nozzle

Pump

Pressure

Flow Rate

Turbulator

Setting

WML-60CRB	59,500	40BF3	0.50 / 60°W	105 PSIG	0.51 USGPH	1.0
WML-80CRB	75,000	40BF3	0.60 / 60°W	115 PSIG	0.65 USGPH	1.5
WML-90CRB	85,600	40BF3	0.65 / 60°W	135 PSIG	0.75 USGPH	2.0

NOTE: Air gate setting may vary for sidewall vented units where air gate must be adjusted to achieve zero smoke.

A.1 OIL BURNER AIR

ADJUSTMENT

For complete details, consult the oil burner instruction manual provided in the furnace documents envelope.

Beckett AF Burner

Adjust the air shutter by loosening the locking screws and moving the air shutter, and if necessary, the bulk air band.

Beckett AFII Burner

Adjust the burner air supply by first loosening the locking screw located on the black dial to the right of the burner. Turn the black dial clockwise to increase the combustion air and counter-clockwise to decrease the combustion air. Re-tighten the locking screw after obtaining the proper setting.

Riello 40 Series (Chimney Vented)

Riello burners are factory set with respect to nozzle size; pump pressure, air gate and turbulator adjustments for each model and firing rate. By removing the burner cover and loosening the screws that secure the air adjustment plate, the combustion air can be adjusted. Move the adjusting plate to either increase or decrease combustion air. When the proper air setting is achieved, retighten the fixing screws.

Riello Balanced Flue (BF) Series

Riello burners are factory set with respect to nozzle size; pump pressure, and turbulator adjustments for each model and firing rate. The combustion air can be adjusted with the burner cover on by first removing the plastic cover on the top right hand side of the burner cover. With a Philips head screw driver, turn the adjustment screw clockwise to increase combustion air or

counter-clockwise to decrease combustion air. When the combustion air is set, re-insert the plastic cover.

A.2 BURNER ELECTRODES

Adjustment of the electrode tips with respect to each other, the nozzle, and to the rest of the burner is very important to ensure smooth start-ups and to permit efficient combustion.

Beckett AF Burner

Electrode gap: 5/32 inch.

Distance above horizontal centerline: 5/16 inch. Older instruction sheets specify 7/16 inch. The current specification is 5/16 inch.

Distance ahead of nozzle: 1/16 inch.

“Z” dimension, the distance from the front of the end cone (head) to the face of the nozzle should be 1-1/8 inches. If a ceramic head is used, the distance from the end cone to the nozzle face is increased to 1-3/8 inches.

Riello 40F, & BF Burners

Electrode gap: 5/32 inch.

Distance above horizontal centerline: 13/64 inch.

Distance ahead of nozzle: 5/64 to 7/64 inch.

A.3 START UP

The furnace should be operated for a minimum of 15 minutes to reach steady state conditions before fine tuning combustion. The warm up time is ideal for testing the oil pump pressure.

Drill a 1/4-inch test port in the venting between the furnace flue outlet and draft regulator (barometric damper). Insert a stack thermometer and note the flue gas temperature. The flue gases should be within a range of 350°F to 450°F. If the flue gases are below the range, it may be necessary to slow down the blower fan. If the flue gases are above the range, the blower fan may require speeding up. Stack temperature varies directly with the

system temperature rise. System temperature rise is the difference between the furnace outlet temperature and furnace inlet temperature as measured in the vicinity of the connection between the plenum take- offs and the trunk ducts

Perform a smoke spot test. The smoke spot should not exceed No. 1 on the Bacharach Scale.

After the air adjustments have been completed, re-check the draft pressure at the test port on the burner mounting plate as shown in Figure #6. The draft should be adjusted to 0.02 inches w.c.

In the United States, the Beckett AF Burner may be equipped with Beckett's "Inlet Air Shut-Off" to increase efficiency. (Beckett Part No. AF/A 5861).

NOTE: USE OF THE INLET AIR SHUT-OFF COULD CAUSE POST COMBUSTION NOZZLE DRIP.

A.4 SPECIAL INSTRUCTIONS FOR UNITS EQUIPPED WITH RIELLO BURNERS

Riello burners are factory set with respect to nozzle size, pump pressure, air gate and turbulator adjustments for each model and firing rate; therefore, do not use the above listed set up procedures.

Riello specifications are listed in Tables A-3 and A-4. Consult the Riello Installation Instructions supplied with the Burner for specific information concerning burner adjustments, operation, and trouble-shooting.

14 30318 R4 9/9/2005