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Summary of Contents for Riello RL 28/2
- Page 1 Installation, use and maintenance instructions Light Oil Burners RL 28/2 - 38/2 - 50/2 Low - High Operation C6505050 - 2915758 (4) - 12/2012...
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Page 2: Table Of Contents
CONTENTS WARNING TECHNICAL DATA......page 3 Do not store flammable or hazardous materials in the vicinity Burner models . -
Page 3: Technical Data
Burner mounted ACCESSORIES (optional): • Kit for lengthening the combustion head = Standard length L1 = Length obtainable with the kit COD. 3010250 • RL 28/2 L = 8 1 / 2 “ L1 = 13 13 / 16 “... -
Page 4: Burner Description
To reset, press the pushbutton. D7631 • MOTOR TRIP (RL 38/2 - RL 50/2 three phase): release by pressing the pushbutton on thermal over- inch load. RL 28/2 ” ” ” 31 / 32 13 / 16 11 / 16 RL 38/2 ”... -
Page 5: Firing Rate
FIRING RATE (A) The RL 28/2 - 38/2 - 50/2 Model burners are available in low-high firing configuration. LOW FIRE DELIVERY must be selected within area A of the adjacent diagrams. HIGH FIRE DELIVERY must be selected within area B. -
Page 6: Installation
Drill the combustion chamber mounting plate as shown in (A). The position of the threaded holes can be marked using the burner gasket supplied with the inch burner. RL 28/2 “ “ 3 / 8 5 / 16 13 / 16... -
Page 7: Nozzle Assembly
Example with the RL 38/2 Model Boiler output = 912 MBTU/hr - efficiency 80 % Output required by the burner = 912 / 0.8 = 1140 MBTU/hr 1140 / 2 = 570 MBTU/hr per nozzle therefore, two equal, 60°, 174 PSI nozzles are required: 1°... -
Page 8: Fuel Supply
HYDRAULIC SYSTEM FUEL SUPPLY DOUBLE - PIPE SYSTEM (A) The burner is equipped with a self-priming pump which is capable of feeding itself within the limits listed in the table at the left. The tank higher than the burner A The distance "P"... -
Page 9: Pump
PUMP (A) 1 - Suction 1/4” NPT 2 - Return 1/4” NPT 3 - Pressure gauge attachment G 1/8 4 - Vacuum gauge attachment G 1/8 5 - Pressure adjustment screw A - Min. delivery rate at 174 PSI pressure D2286 B - Delivery pressure range C - Max. -
Page 10: Burner Calibration
• Pump pressure 174 PSI: This is the pressure calibrated in the factory which is usually sufficient for most purposes. Some- Low fire RL 28/2 RL 38/2 RL 50/2 times, this pressure must be adjusted to: 145 PSI in order to reduce fuel delivery. This adjust-... -
Page 11: Final Check
FINAL CHECKS • Obscure the photocell and switch on the burner: the burner should start and then lock-out about 5 s after opening of the low fire nozzle valve. • Illuminate the photocell and reset the burner: the burn- er should go into lock-out . •... -
Page 12: Burner Operation
BURNER OPERATION BURNER STARTING (A) Operating control closes. The motor starts and the ignition transformer is con- nected. The pump 3) sucks the fuel from the tank through the piping 1) and the filter 2) and pumps it under pressure for delivery. -
Page 13: Appendix
230 V • The RL 28/2 - 38/2 - 50/2 burners have been type-approved for intermittent operation. This means they should compulsorily be stopped at least once every 24 hours to enable the control box to check its own efficiency at start-up. Burner halts are normally provided for auto- matically by the boiler load control system. -
Page 14: Switchboard Layout
RL 28/2 - 38/2 SINGLE PHASE... - Page 15 RL 50/2 SINGLE PHASE...
- Page 16 RL 28/2 - 38/2 - 50/2 SINGLE PHASE...
- Page 17 RL 38/2 - 50/2 THREE PHASE...
- Page 18 RL 38/2 - 50/2 THREE PHASE...
- Page 19 Key to Layouts + BB - Components on board burners + BQ - Components on board main panel + BC - Components on board boller DISC1 - Disconnect switch motor DISC2 - Disconnect switch auxiliary - Motor fuse - Auxiliary fuse - High limit control - Control box - Remote lock-out signal...
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Page 20: Burner Firing Rates According To Air Density
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 1,049 1,031... - Page 21 OPERATION LAYOUT Low-High Switching times are given in seconds, in the burner startup sequence. LAL 2.25 optional optional Legend for the times Pre-purge time with air damper open. Safety time. Pre-ignition time, short (“Z” connected terminal “16”). Interval between voltage at terminals “18” and “20” Air damper running time to OPEN position.
- Page 22 BURNER FAULT INDICATIONS Control program fault conditions and lock-out indication Whenever a fault occurs, the sequence switch stops and with it the lock-out indicator. The symbol above the reading mark of the indicator gives the type of fault: No start One of the contacts has not closed The contact of the limit thermostat or any other switching devices in the control loop of terminal 4 to terminal 5 are...
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Page 23: 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 24 RIELLO S.p.A. I - 37045 Legnago (VR) Tel.: +39.0442.630111 http:// www.rielloburners.com RIELLO BURNERS NORTH AMERICA 1-800-4-RIELLO 35 Pond Park Road 2165 Meadowpine Blvd. Hingham, Massachusetts, 1-800-474-3556 Mississauga, Ontario, U.S.A. 02043 Canada L5N 6H6 http://www.riello-burners.com Subject to modifications...
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