Riello RLS 28 Installation, Use And Maintenance Manual
Dual fuel gas/light oil burners
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- Installation, use and maintenance instructions (44 pages)
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Summary of Contents for Riello RLS 28
- Page 1 Installation, use and maintenance instructions Dual Fuel Gas / Light Oil Burners RLS 28 - 38 - 50 Low - High Operation C6505058...
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Page 2: Table Of Contents
Field wiring diagram - RLS 28-38-50 with burner mounted LFL 20 Factory wiring diagram - RLS 28-38-50 with remote panel ..21 Appendix - Burner firing rates according to air density..22 Flame signal measurement . -
Page 3: Technical Data
• RLS 50 1 / 2 13 / 16 • Kit for LPG operation - Code 3010304: The kit allows the RLS 28-38-50 burners to operate on LPG . • Gas train according to UL Standards: see page 12. Important:... -
Page 4: Burner Description
D2536 To reset, press the pushbutton. • Motor trip (RLS 50 three-phase): Release by pressing the pushbutton on the thermal overload 22)(A). inch RLS 28 31 / 32 “ 24 13 / 16 “ 19 11 / 16 “... -
Page 5: Firing Rates
FIRING RATES (A) RLS 28 The RLS 28 - 38 - 50 Model burners can work in two ways: low and high fire. MAXIMUM OUTPUT must be selected in area A. MINIMUM OUTPUT must not be lower than the mini-... -
Page 6: Installation
4.32 4.74 5.16 deliveries. 4.00 4.93 5.44 5.89 RLS 50 4.50 5.54 6.12 6.63 Example with the RLS 28 Model 5.00 6.15 6.79 7.36 Boiler output = 921 MBtu/hr @ efficiency 80 % 5.50 6.76 7.46 8.10 1044 6.00 7.40 8.17... -
Page 7: Nozzle Assembly
NOZZLE ASSEMBLY Remove screw 1)(D)p.6 and extract the internal part 2)(D)p.6 Install two nozzles with the box wrench 1)(A), after having removed the plastic plugs 2)(A), fitting the wrench through the central hole in the flame stability disk or loosen screws 1)(B), remove disk 2)(B) and replace the nozzles using the wrench 3)(B). -
Page 8: Servomotor
SERVOMOTOR (A) The servomotor adjusts the air damper. ORANGE CAM The servomotor rotates through 90° in 25 seconds. Do not alter (for the time-being) the factory setting. BLUE CAM Blue cam RED CAM Sets the position of the air damper during low fire opera- tion. -
Page 9: Fuel Supply
FUEL SUPPLY The burner is equipped with a self-priming pump which is capable of feeding itself within the limits listed in the table at the side. The tank higher than the burner A The distance “P” must not exceed 33 ft in order to avoid subjecting the pump's seal to excessive strain;... -
Page 10: Burner Calibration
- Start the burner by closing the control circuit, with switch 1)(A) in the "MAN" position and with switch 21)(A)p.4 in the "OIL" position. - The pump is primed when the fuel oil starts coming out of the screw 3)(B)p.8. Stop the burner: switch 1)(A) set to "OFF"... -
Page 11: Gas Pressure
• Pressure in combustion chamber = 0.79” WC 1325 4.09 3.66 - 0.79 = 2.87” WC 1440 4.37 A high fire ouput of 796 MBtu/hr shown in table RLS 28 1553 4.65 corresponds to 2.87” WC pressure, natural gas. 1666 5.11 This value serves as a rough guide, the effective delivery must be measured at the gas meter. -
Page 12: Gas Piping
GAS PIPING • The gas train must be connected to the gas attach- ment 1)(A), using flange 2), gasket 3) and screws 4) supplied with the burner. • The gas train can enter the burner from the right or left side, depending on which is the most convenient, see fig. -
Page 13: Adjustments Before First Firing
ADJUSTMENTS BEFORE FIRST FIRING (gas LOW GAS PRESSURE SWITCH AIR PRESSURE SWITCH operation) Adjustment of the combustion head has been illustrated on page 7. In addition, the following adjustments must also be made: - open manual valves down stream and up stream from the gas train. -
Page 14: Burner Calibration
BURNER CALIBRATION (gas operation) The optimum calibration of the burner requires an analy- sis of the flue gases at the boiler outlet. Adjust successively: 1 - High fire burner output 2 - Low fire burner output 3 - Air pressure switch 4 - Minimum gas pressure switch D791 1 - HIGH FIRE OUTPUT... - Page 15 3 - AIR PRESSURE SWITCH (A) - CO CHECK AIR PRESSURE SWITCH Adjust the air pressure switch after having performed all other burner adjustments with the air pressure switch set to the start of the scale (A). With the burner operating in low fire, increase adjustment pressure by slowly turning the relative dial clockwise until the burner locks out.
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Page 16: Maintenance
MAINTENANCE FLAME INSPECTION WINDOW Combustion The optimum calibration of the burner requires an analy- sis of the flue gases. Significant differences with respect to the previous measurements indicate the points where more care should be exercised during maintenance. Gas leaks Make sure that there are no gas leaks on the pipework between the gas meter and the burner. -
Page 17: Hydraulic System Layout
HYDRAULIC SYSTEM LAYOUT (A) 1 Pump suction 2 Filter 3 Pump 4 Pressure regulator 5 Return pipe 6 By-pass screw 7 Pump return 8 Safety solenoid 9 Low fire valve 10 High fire valve 11 Filter M Pressure gauge P Low oil pressure switch V Vacuum gauge OIL PRESSURE SWITCH The oil pressure switch 26)(A) page 4 is factory set to... - Page 18 Factory Wiring Diagram RLS 28 - 38 With burner mounted Siemens LFL control D2295 Continuous fan operation Change the wire connection from terminal 6 to terminal 1, move the jumper from terminals 12-13 to terminals 4-12 and change the K1 - 9 wire connection from terminal A2 of of the motor contactor to terminal 6 of the control box, as indicated below.
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Page 19: Factory Wiring Diagram - Rls 28-38 With Burner Mounted Lfl . 18 Factory Wiring Diagram - Rls 50 With Burner Mounted Lfl
Factory Wiring Diagram RLS 50 With burner mounted Siemens LFL control D2296 Continuous fan operation Change the wire connection from terminal 6 to terminal 1, move the jumper from terminals 12-13 to terminals 4-12 and change the K1 - 9 wire connection from terminal A2 of of the motor contactor to terminal 6 of the control box, as indicated below. -
Page 20: Field Wiring Diagram - Rls 28-38-50 With Burner Mounted Lfl
Field Wiring Diagram RLS 28 - 38 with burner mounted Siemens LFL control D2297 Field Wiring Diagram RLS 50 with burner mounted Siemens LFL control D2298 RLS 28 - 38 RLS 50 208 - 120 V 460 V 575 V... -
Page 21: Factory Wiring Diagram - Rls 28-38-50 With Remote Panel
Factory Wiring Diagram RLS 28 - 38 with remote control panel D2416 Factory Wiring Diagram RLS 50 with remote control panel D2419 LAYOUT (A) Key to layout (A) - (B) - Burner terminal strip Burners RLS 28 - 38 - Fan motor capacitor... -
Page 22: Appendix - Burner Firing Rates According To Air Density
APPENDIX - Burner firing rates according to air density CORRECTION FACTOR average barom. above sea level Air temperature pressure °F (°C) “ W.C. mbar 0 (0°C) 41 (5°C) 50 (10°C) 59 (15°C) 68 (20°C) 77 (25°C) 86 (30°C) 104 (40°F) 1013 1,087 1,068... -
Page 23: Flame Signal Measurement
FLAME SIGNAL Min value for a good signal: 70 µA. If the value is lower, it can be due to: • Worn scanner; • Low current; • Bad set up of the burner. In order to measure the current, use a microammeter of 100 µA c.c., connected to the scanner, with a capacitor D1143 of 100 µF - 1V c.c. -
Page 24: Siemens Lfl Control Troubleshooting Guide
Control program under fault In case of any disturbance, the sequence mechanism stops and with it the lock-out indicator. The symbol above the reading mark of the indicator gives the type of disturbance: conditions and lock-out indication No start, e.g. because one contact is not closed. Lock-out during or after control program sequence due to extraneous light (e.g. -
Page 25: Burner Start Up Report
BURNER START UP REPORT Model number: Serial number: Project name: Start-up date: Installing contractor: Phone number: GAS OPERATION Gas Supply Pressure: : Low Fire High Fire Main Power Supply: : Low Fire High Fire Control Power Supply: CO: Low Fire High Fire Burner Firing Rate: : Low Fire... - Page 26 Represented By: Power Equipment Company 2011 Williamsburg Road Richmond, VA 23231 Ph: 804-236-3800 Fx: 804-236-3882 www.peconet.com...