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Refer to Table 9 for proper nozzle size, air settings and fuel pump pressure setting based on desired firing rate. If the desired firing rate is the lower GPH: a. replace the factory installed high firing rate nozzle with one of the loose lower firing rate nozzles. b. replace the factory installed head positioning bar with the corresponding head bar that matches the lower GPH nozzle installed, see Table 9. c. change the factory air settings according to Table 9 and, d. check the oil pump pressure and adjust if necessary to the setting specified in Table 9, refer to Paragraph H, Step 5 for details. 4. INSPECT RIELLO BURNER AIR DAMPER AND TURBULATOR SETTING, readjust if necessary, see Table 9a. a. Remove pressure port/bleeder plug from fuel pump and install Riello Combination Pressure Gauge and Bleeder Valve Assembly. 5. OPEN ALL OIL LINE VALVES. 6. ATTACH A PLASTIC HOSE TO FUEL PUMP VENT FITTING and provide a pan to catch the oil. 7. OPEN FLAME OBSERVATION DOOR on front of boiler. H. START OIL BURNER. 1. Open vent fitting on fuel pump. 2. TURN ‘ON’ BURNER service switch and allow burner to run until oil flows from vent fitting in a SOLID stream without air bubbles for approximately 10 seconds. 3. Close vent fitting and burner flame should start immediately after pre-purge is complete. Pre-purge prevents burner flame until 15 seconds has elapsed after initial power is applied to burner. During pre-purge, the motor and ignitor will operate but the oil valve will remain closed. Refer to Oil Primary Control Instructions for more details. Figure 26: Adjusting Fuel Pump Pressure 4. ADJUST OIL PRESSURE for Beckett AFG burners (shut the burner off). a. When checking a fuel unit's operating pressure, a reliable pressure gauge may be installed in either the bleeder port or the nozzle port. See Figure 26. b. Locate oil pressure adjusting screw and turn screw for appropriate pump pressure, refer to Table 9 at rear of manual. c. To check the cutoff pressure, deadhead a reliable pressure gauge onto the copper connector tube attached to the nozzle port. Run the burner for a short period of time. Shut the burner off. The pressure should drop and hold. d. Remove the gauge and install bleeder port and/or reconnect the nozzle port line. 5. VERIFY/ADJUST FUEL PUMP PRESSURE for Carlin EZ-HP burners. a. Turn “off” burner service switch. Figure 26A: Adjusting Fuel Pump Pressure b. When checking a fuel pump’s operating pressure, a reliable pressure gauge may be installed in either the gauge port or the bleeder port. See Figure 26A. 6. VERIFY/ADJUST OIL PRESSURE for Riello 40 burner. Adjust oil pressure. Locate oil pressure adjusting screw and turn screw to obtain proper pump pressure, refer to Figure 8 and Table 9A. I. ADJUST OIL BURNER WHILE OPERATING. (flame present) 1. ADJUST DRAFT REGULATOR for a draft of -0.02” (water gauge) over the fire after chimney has reached operating temperature and while burner is running. 2. READJUST THE AIR DAMPER SETTING on the burner for a light orange colored flame while the draft over the fire is -0.02”. Use a smoke tester and adjust air for minimum smoke (not to exceed #1) with a minimum of excess air. Make final check using suitable instrumentation to obtain a CO2 of 11.5 to 12.5% with draft of -0.02” (water gauge) in fire box. These settings will assure a safe and efficient operating condition. If the flame appears stringy instead of a solid fire, try another nozzle of the same type. Flame should be solid and compact. After all adjustments are made recheck for a draft of -0.02” over the fire. 3. READJUST THE TURBULATOR SETTING only if necessary. a. CL3 through CL5 Move the turbulator setting forward or back one position at a time to optimize the smoke and CO2 readings. 4. Turn “OFF” burner and remove Riello Combination Pressure Gauge and Bleeder Valve Assembly. Install pressure port/bleeder plug and tighten. Start burner again. 5. FLAME FAILURE The CL Series boiler controls operate the burner automatically. If for unknown reasons the burner ceases to fire and the reset button on the primary control has tripped, the burner has experienced ignition failure. Before pressing the reset button call your heating contractor immediately. WARNING Do not attempt to start the burner when excess oil has accumulated, when the unit is full of vapor, or when the combustion chamber is very hot. 7. CAD CELL LOCATION AND SERVICE The burner is supplied with a cadmium sulfide flame detector mounted at the factory, mounted on the bottom of the electronic ignitor. See Figure 27. To service cad cell or to replace the plug in portion, swing open the ignitor. After service is complete, be sure to fasten down the ignitor. Figure 27: Cad Cell Location J. CHECK FOR CLEAN CUT OFF OF BURNER. 1. AIR IN THE OIL LINE between fuel unit and nozzle will compress when burner is on and will expand when burner stops, causing oil to squirt from nozzle at low pressure as burner slows down and causing nozzle to drip after burner stops....

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