Assessments - 4, GPA: 4.3
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SK9475 RWB 6104 BAFG R02 Page 5 Outside air kit applications Refer to separate instruction sheet supplied with AF/AFG outside air kit for installation. This optional kit allows combustion air to be piped directly to the burner (Beckett part number 51747). Clearances to burner and appliance • Provide space around burner and appliance for easy service and maintenance. • Check minimum clearances against those shown by the appliance manufacturer and by applicable building codes. Combustion chamber — Burner retrofitting Verify that the appliance combustion chamber provides at least the minimum dimensions given in Table 3. WARNING! Protect Steel Combustion Chamber From Burnout Failure to comply could result in damage to the heating equipment and result in fire or asphyxiation hazards. • When retrofitting appliances that have unlined stainless steel combustion chambers, protect the chamber by lining the inside surfaces with a ceramic fiber blanket, such as a wet-pac or other suitable refractory material. • Some steel chambers may not require liners because the appliance was designed and tested for use with flame retention burners. Refer to the manufacturer’s instructions. Table 3. Chamber Dimensions Chamber Dimensions (inches) Firing Rate (GPH) Round I.D. Rectangular Height Floor to nozzleWidth Length 0.50 8 7 8 12 5-6 0.75 9 8 9 12 5-6 1.00 10 9 10 12.5 5-6 1.25 11 10 11 12.5 5-6 1.50 12 11 12 13 6-7 2.00 14 12 15 13.5 6-7 2.50 16 13 17 14 7-8 3.00 18 14 18 15 7-8 Prepare the Burner Low Firing Rate Baffle The AFG Low Firing Rate Baffl e (LFRB) reduces the air flow and pressure. The LFRB is sometimes used for firing rates under 1.00 gph as listed in Table 4. Refer to the appliance manufacturer’s instructions. Do not omit the LFRB when specified. Omitting the baffle when specified or installing the baffle when not specified could result in impaired burner performance. Table 4. AFG Reduced Firing Rates (with LFRB) Burner head type Low Firing Rate Baffl e installed F0 up to 0.65 gph F3 or L1 up to 0.85 gph F4 or F6 up to 0.90 gph V1 up to 1.00 gph Burner fuel unit • Verify that the burner fuel unit is compatible with the oil supply system. For more details, refer to “Connect fuel lines” later in this manual. Nozzle and Pump Pressure WARNING! Correct Nozzle and Flow Rate Required Incorrect nozzles and fl ow rates could result in impaired combustion, under-fi ring, over-fi ring, sooting, puff-back of hot gases, smoke and potential fire or asphyxiation hazards. Use only nozzles having the brand, flow rate (gph), spray angle and pattern specified by the appliance manufacturer. Follow the appliance manufacturer’s specifications for the required pump outlet pressure for the nozzle, since this affects the fl ow rate. • Nozzle manufacturers calibrate nozzle fl ow rates at 100 psig. • When pump pressures are higher than 100 psig, the actual nozzle flow rate will be greater than the gph stamped on the nozzle body. (Example: A 1.00 gph nozzle at 140 psig = 1.18 gph) Securely tighten the nozzle (90 torque inch pounds). For typical nozzle flow rates at various pressures refer to Table 5. Page 6 RWB 6104 BAFG R02 Table 5. Nozzle Flow Rate by Size Nozzle flow rate U. S. gallons per hour of No. 2 fuel oil when pump pressure (psig) is: Nozzle size (rated at 100 psig) 125 psi 140 psi 150 psi 175 psi 200 psi 0.40 0.45 0.47 0.49 0.53 0.56 0.50 0.56 0.59 0.61 0.66 0.71 0.60 0.67 0.71 0.74 0.79 0.85 0.65 0.73 0.77 0.80 0.86 0.92 0.75 0.84 0.89 0.92 0.99 1.06 0.85 0.95 1.01 1.04 1.13 1.20 0.90 1.01 1.07 1.10 1.19 1.27 1.00 1.12 1.18 1.23 1.32 1.41 1.10 1.23 1.30 1.35 1.46 1.56 1.20 1.34 1.42 1.47 1.59 1.70 1.25 1.39 1.48 1.53 1.65 1.77 1.35 1.51 1.60 1.65 1.79 1.91 1.50 1.68 1.77 1.84 1.98 2.12 1.65 1.84 1.95 2.02 2.18 2.33 1.75 1.96 2.07 2.14 2.32 2.48 2.00 2.24 2.37 2.45 2.65 2.83 2.25 2.52 2.66 2.76 2.98 - 2.50 2.80 2.96 --- Attach air tube (if not already installed) If using a flange and gasket, slide them onto the air tube. Then attach the air tube to the burner chassis using the four sheet metal screws provided. Refer to Figure 3 for details. Install burner nozzle (if not already installed) 1. Remove the plastic plug protecting the nozzle adapter threads 2. Place a .” open-end wrench on the nozzle adapter. Insert the nozzle into the adapter and fi nger tighten. Finish tightening with a .” open-end wrench. Use care to avoid bending the burner head support legs or electrodes. If you remove the head to replace the nozzle (type “L1”/“L2” or “V1” heads), carefully reconnect the head to the nozzle adapter, making sure that the head support makes contact with the nozzle adapter shoulder. Refer to Figure 4 or 5. Table 6. Nozzle Spray Angles 3. If the nozzle is already installed, remove the nozzle line assembly to verify that the nozzle size and spray pattern are correct for the application (per appliance manufacturer’s information). Verify that the electrode tip settings comply with Figure 2. 4. If the nozzle is not installed, obtain a nozzl...
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