Document rK5pJXdr8XbYDKQzvMxXa5jE

AMERICAN STANDARD r' -> we 20 THROUGH 750 HORSEPOWER ' for oil--gas--combination gas-oii "*` ; HIGH or LOW PRESSURE STEAM or WATER ii v . ^ ... 4* 13136 Bulletin 96-12-96A / KEWANEE tlnci product imprmamaM ii a contlriCVi dttort at Amaiican Standard, tha riiht it Kewanee has been building various types of heat generating equipment for over 100 years. During that time we have discussed heat and process steam requirements with thousands of contractors, engineers, and architects. We now have more Kewanee boiler units in service than any two com petitors combined. From these users, installers, and specifiers, we have found that more than basic fundamentals are required to satisfy the needs and desires of today. We have designed the Kewanee Scotch Generator to fill these needs. FOR EXAMPLE: MOST USERS WANT the boiler, burner, controls, and accessories under the single responsibility of one reputable manufacturer. The Kewanee Scotch Generator is a com pletely packaged, factory-assembled unit--designed, engi neered. built and serviced by the largest manufacturer of air conditioning, heating and ventilating equipment. MOST USERS WANT to use locally available, low-cost fuels to generate heat. Available fuels vary widely in heat content and burning characteristics--from viscous residual oil to stable light oils--from liquified petroleum gas to by product or manufactured gas. The Kewanee Scotch Gen erator burner is specially designed for any commercially available liquid or gaseous fuel that the customer specifies MOST USERS WANT modern architectural design with small space requirements. Building cost and appearance demands minimum space for boiler equipment in addition 10 the elimination of unsightly smokestacks The Kewanee Scoich Generator combines a compact three-pass scotch design with forced draft firing for minimum floor space requirements and only a stub vent 1o discharge products of combustion MOST USERS WANT maximum, not minimum, safety of operanon. Compliance with local and national codes means that equipment conforms only to minimum safely standards. The Kewanee Scoich Generator provides, as a standard for all units, safety features that exceed all mini mum requirements. Kewanee safety features include elec tronic flame safeguard, updraft gas flow, pre and post purge of combustible gases, dual operating limit controls and dual gas valves for maximum customer protection. MOST USERS WANT to burn the least possible amount of fuel Boiler unit efficiency depends on how well the fuel is burned and how effectively the boiler heat transfer surfaces absorb the heat. The Kewanee Scotch Generator utilizes efficient forced draft burner equipment to promote combustion and extract the maximum energy from each pound of fuel consumed Large furnace tube and water-back design provide a greater ratio of primary to secondary heating surface. Primary heating surface transfers more heat per square fool than secondary surfaces because it is ex posed to the radiant heat of the flame as well as hot gases. MOST USERS WANT maximum service life without major costly repairs. Unless preventive measures are in corporated into the basic design of the boiler, expansion and contraction set up destructive forces within the unit The most detrimental of these forces is the stress put upon components by temperature differential. That is the variance in heat intensity from one point to another within a single part or component. The Kewanee Scotch Generator pro vides separate rear tube sheets at the end of the first and third passes, thereby reducing stresses which contribute to metal fatigue and resultant early failure. MOST USERS WANT freedom from frequent replace ment of parts which burn out. crack, or deteriorate with use Heating surfaces (steel backed by water) have a greater resistance to deterioration than metal baffles, re fractories. or seals which require periodic repair and replacement. The Kewanee Scotch Generator water-back design requires refractory only in the burner combustion zone--no refractory, no baffles, no seals are necessary m the rear of the boiler. MOST USERS WANT easy maintenance. Since all equip ment requires oiling, checking, and cleaning, ease of maintenance is an important consideration. The Kewanee Scotch Generator fealures "one-man'' maintenance. Motors and controls may be checked from floor level. Large front and rear openings provide easy access to boiler tubes without disconnecting or removing any controls or components. MOST USERS WANT a quality product backed by national testing standards. "Kewanee--The Standard of Ouality in the Industry"--is our hallmark of excellence. Kewanee Scotch Generators meet or exceed ASME and UL standards, and are constructed to meet any customerspecified insurance or local code requirements. MOST USERS WANT local service facilities and replace ment parts. Down-time for repairs, whether on space heat ing. or process applications, must be held to a minimum by having qualified servicemen and ample parts stock readily available. The Kewanee Scotch Generator is backed by 120 local service outlets that furnish start up and 90-day free service after installation, and maintain a stock of repair parts for continued equipment service. These are some of the often overlooked features that you--the user, the con tractor, or specifier--have told us you want and need. Combining all of these features into a balanced design has required years of practical field experience. If you measure these "balanced design" features against those offered by others, we are confident your choice will be ... KEWANEE. 13138 KEWANEE- Scotch / 4 < 1 URGE FURNACE TUBE . . . provides abundan! volume for complete combustion and a treater proportion of primary heating surface. Assures quiet operation. 2 THREE PASS DESIGN . . . provides full S square feet of heating surface per horsepower. 3 FIRE TUBES ... set in tube sheets, roller ex panded. not welded, for permanent leak-proof Fit. A TOP REAR OUTLET . . . ideally located tor stub stack application. . 5 WATER-BACK DESIGN . . . eliminates refractory baffles and seals. Increases primary heating surface. 6 REAR TUBE SHEETS . . . separate tube sheets at the end of first and third passes. 7 FRONT AND REAR ACCESS OPENINGS . . . for ease of inspection and cleaning 8 URGE STUM SPACE . combined with abundant unbroken disengaging area, large water content, and integral steam 'separator assures steady water line and dry qua>*y steam. 9 SHELL . . . extra heavy qualiy plate for strength rnfl dependability - 10 INSUUTION . . . completely insulatS^wEffimineral or glass fiber on full circumference of shell. llTXCKET factory installed heavy gauge enameled steel wrtK' esiUlCtiuun plates IIIXIW openings. 12 STURDYSTEEL SKIDS . . . offers ease in handl ing and balanced weight distribution. 13 URGE WATER CONTENT . . . results in less fuel dollar loss in off-cycle and guarantees adequate reserve for fluctuating system demands. 14 SAFETT CONTROLS . . . high safety limits, burner modulating controls . . . factory mounted and wired. .CONTROL CABINET . . . master programming lame safeguard relays, switching relays, motor retie starters, numbered terminal strips, indi cating lights . . . mounted and wired in heavy gauge steel, dust-proof cabinet. < 13139 Matures B_AJ THREE PASS DESIGN The amount and location of healing surface is of major importance in determining boiler efficiency. Although the arrangement of this heating surface inio 2. 3 or 4 passes has no effect on efficiency in a well-designed boiler, the number of passes does determine over all dimensions, baffling requirements and flue gas pressure drop which, in turn, determines fan motor requirements. The Kewanee Scotch Generator Three Pass Design provides ample well-designed healing surface with a high ratio of primary to secondary heating surface for highest operalmg efficiency. Three Pass Design also permits a top rear smoke outlet ideally located for stub stack application and minimum interference with piping and controls. Compacl proportioned overall dimension permits installation in limited space. Low gas pressure drop through ihe boiler reduces electrical power costs. HIGH QUALITY WELDED STEEL BOILER The Kewanee Generator is formed from heavy quality steel, joined by deep peneuation welds. Qual (Q) (ASME> ity control begins with the in spection of raw materials, which must conform with rigid speci fications. and is maintained slep by step, throughout the con struction of each individual unit. Every Kewanee Generator is inspected, tested, stamped, and a data sheet issued attesting to the fidelity of workmanship and material of the pressure vessel and its components. Physical and operational characteristics of the uml are certified to meet, or exceed. ASME Code requirements. High pressure shells are x-rayed and stress relieved WATER HEATING COILS Standard Kewanee "Kl" (instantaneous) and "KT" (tank) coils are available for low pressure units ONE SOURCE RESPONSIBILITY The entire generator is listed by Underwriters Laboratory (UL). The complete unit is the responsi bility of one manufacturer. This responsibility in cludes boiler, burner, controls, and accessory equipment. SEPARATE REAR TUBE SHEETS A rear tube sheet for each gas temperature zone prevents internal stresses which may occur in a single tube sheet exposed to wide temperature differences. This feature prevents short circuiting of hot gases and by-passing of fire tubes with the resultant high stack temperatures EASY MAINTENANCE Large access openings in rear combustion chamber and smokebox make rear tube sheets readily accessible for inspection. Large insulated gas-tight front doors permit easy inspection of front tube sheet and cleaning of tubes without disturbing burner components, fuel or power connections. PROVED DEPENDABILITY-PEAK PERFORMANCE Modern concept based on experienced engineering--advanced design and top quality construction--assure highest efficiency, faithful performance, long dependable service. Ratings are con servative-five square feet of fireside healing surface per horse power--provides adequate reserve capacity. Firing rates are carefully matched to heating surface. Flame size and shape are matched to furnace dimensions. These combined features assure minimum operating efficiency of 80%. GREATER PRIMARY HEATING SURFACE Total square feet of heating surface is less important than total effectiveness of heating surface. One square foot of primary healing surface is 4 to 15 times as effective as one square foot of secondary heating surface Brand "A" Brand "6'* PRIMARY rmmi Brand "C" Kawanaa Scotch Ganarator SECONDARY Kewanee provides more "high value" heating surface . . . more effective" heating surface than offered by the three other major competitive brands on the market today. WATER COOLED BACK The rear combustion chamber is entirely submerged in water... no refractory to deteriorate either from chemicals in fuel or from expansion and contraction . . . reduces costly maintenance and repairs . . . absorbs heat rather than reflecting heat on critical tube sheet areas. Updraft water back design is more expensive to build, but costs the user less. Eliminates regular refractory repairs . . . eliminates baffle leakage which results in lower operating efficiency. 13140 KEWAN E E' Kewanee Scotch Generators are available for oil. gas. or combination gas/oil firing. Each Kewanee Forced Draft Burner is custom engineered for the generator it fires, assuring long, dependable and economical service. Two series of Kewanee Burners cover the entire range of boiler capacities and fuels. On Units 20 through 150. for light oil (No. 2 CS12-48) the oil burners are of the high pressure mechanical atom izing type, complete with motor; fan; oil pump; nozzle ; ignition assembly (direct spark on Units 20 thru 50. gaselectric on Units 60 thru 150); oil filter; combustion controls and relays necessary for automatic operation. Oil piping is ready for field connection to oil supply. On Units 60 through 750. for No. 6 or lighter oil. the oil burners are of the low pressure air-atomizing type, com plete with motor; fan; air and oil assemblies; nozzle; gas-electric ignition; oil filter; combustion controls and relays necessary for automatic operation. Oil piping is ready for field connection to oil supply. The air-oil assemblies include air compressor; oil pump ; motors; and all necessary accessories to provide the fine oil atomization required for clean, efficient oil firing. A thermostatically controlled electric oil heater maintains uniform oil temperature to compensate for varying vis cosities of residual oils. GAS BURNERS Gas burners are of the multiport flame retention type, complete with motor; fan: gas-electric ignition; dual automatic gas valves; manual gas valve: gas pressure regulator; combustion controls and relays necessary for automatic operation. Gas piping is ready for field connection to gas supply. GAS-OIL BURNERS Gas-oil combination burners include the features of both the gas burners and oil burners in a single unit. No burner modifications to change fuels--just a flip of a switch. 13141 EXCLUSIVE COMBINATION HEAD Exclusive design of burner firing head provides quiet, stable combustion of gas or oil at all inputs. The annular gas ports and vaned air diffuser assure complete mixing of gas and air for stable operation under wide variations of gas pressure and other conditions without objec tionable noise or pulsation. Swirling high velocity secondary air supply assures intimate mixing of fuel and air for clean, efficient firing. MAXIMUM SAFETY Dual automatic main gas valves provide added pro tection against valve leakage. Dual high limit controls. low water cut-off and safety relief valves provide added protection against, excessive temperature or pressure and low water conditions. Boiler passages are purged of possible accumulation of combustible gases both before and after each firing cycle. An electronic flame safeguard continuously monitors pilot and main flame combustion sequence. CONTROL CABINET Electronic flame safeguard and programming system: switching relays: necessary magnetic starters, numbered terminal strips; indicating lights for major operations and fuel selector switch--all are mounted and wired in a heavy gauge steel, dust proof control cabinet. Wiring is ready for connection to source of power. MODEL DESIGNATION CHART Construction Design Output Kiting ^ l w U Qap I__ Tc Design Pressure--Lew Pressure High Pressure - H Heeling Medium--Water (w) Steam S fuel o Unit Output--Gross horsepower nting - designate Tl Grade ot Oil-Air Atomizing Burner Number of U.S. Com'l. Std. Grade Oil Firing-All Grades of Oil - 0 Gas firing--All types of Gas ^G^) EXAMPLE: LW-200-G05 is standard low pressure hot water 200 horsepower generator equipped for combination gas and No. 5 oil firing. 13142 7 KEWANEE / Sta.ncia.rca. Equipment Optional Eequipment ALL UNITS 1. ASME Code Boiler 2. Three-pass Scotch Boiler Design with Water Back 3. Full Length Skid Type Base 4. Gas-Tight Construction 5. Pyrea Observation Ports (front & rear) C. Access Openings (front l rear) 7. Roller Expanded FuatabeTT?* 1^4.70-200; 2W'-Units 250-750) S. Top Vent (Units 60-7x1); Rear Vent (UnffrSQ^M) 9. Metal Jacket Vith Mineral Fiber Insulatioa 10. Lifting Loops ' 11. Explosion Relief fiboc. 1. Flue Gas Temperature Gauge 2. Other Than Standard Voltages 3. Circuit Breaker 4. Alarm Bell 5. Instantaneous or Tank Type Water Coils (Low Pressure Units) 6. Controls for FM 7. Controls for FtA 8. One-Year Service Period 12. Forced Draft Burner AsseltiWy- 13. Operating High Limit Control 14. Safely High Limit Control 15. Firing Sequence: On-Ofl (Units 20-50) High-Low-Off (Units 60-80) Modulating (Units 100-750) 16. Modutro! Motor to Control Air-Fuel Supply (Units 60-750j 17. Control Voltage--115 v., 60 ey_ 1 ph. (Includes Reduced Voltage Transformer Where Required) 18. Control Cabinet including: Electronic Flame Safeguard and Programming Control; Control Circuit Fuse; Control Circuit Transformer (Units 40-750); Control Circuit Switch; Burner Switch; DC Voltmeter or Mi croammeter (Units 60-750); Manual Potentiometer (Modulating Units Only); Indicating Lights; numbered Terminal Strip; Color Coded Wiring; Engraved Name Plates; and Necessary Relays and Magnetic Starters 19. Listed Standard and Selected Optional Equipment Mounted, Piped, Wired, Ready for Field Connection to Fuel, Water, Steam and Electricity. (Exceptions: Items shipped separately to prevent shipping damage.) 20. Factory Fire-Test 21. Starting Service rstartup and 90 days service) STEAM UNITS 1. No. 157 Combination Water Column, low Water Cut-Off. and Pump Control 2. Safety Valves 3. Steam Gauge 1. No. 193 Combination Water Column, Low Water Cut-Off, Pump Con trol and Alarm Switch 2. No. 51-2 Combination Low Water Cut-Off, Water Feeder and Alarm Switch (Low Pressure Units) 4. Water Glass Gauge and Try Cocks 3. Second Low Water Cut-Off 5. Manhole (Units 80-750) 6. Quick-Opening and Slow-Opening Blow-Off Valves rHigh Pressure Units) 7. Drain Valve (Low Pressure Units' 4. Injector (High Pressure Units) 5. Higher than Standard Steam Working Pressure rUnits 60-750) 1. No. 63 Low Water Cut-Off 2. Relief Valves 3. Pressure Gauge 4. Thermometer 5. Drain Valve HOT WATER UNITS 1. No. 51-2 Combination Low Water Cut-Off, Water Feeder and Alarm Switch 2. Second Low Water Cut-Off 3. Higher than Standard Water Working Pressure rUnits 60-750 GAS UNITS 20-50 1. Multiple-Jet Flame Retention Type Gas Burner 2. UL Gas Control Group including: Automatic Operating Gas Valve, Auto matic Safety Gas Valve, Gas Pressure Regulator, Gas Cock, Gas Pressure Gauge 3. Gas-Electric Ignition Assembly 4. Flame Rod Flame Detector 1. High-Low-Off Firing Sequence (Units 40-50) 2. Modulating Firing Sequence (Units 40-50) 3. Lead Sulphide Flame Detector 4. Gas Controls for Other Than Standard Pressures 5. Gas Controls for Local Utility Requirements 5. On-Off Firing Sequence 6. Air Flow Safety Switch 13143 / Sta.nda.rd. Equipment Optional Ecq-u.iprn.errt GAS UNITS 60-750 Annular Port Flame Retention Type Gas Burner UL Gas Control Group including. Automatic Motorized Gas Valve, Auto matic Safety Gas Valve, Gas Pressure Regulator, Gas Volume Control Valve with Adjustable Cam Operator; Lubricated Plug Gas Cock, Gas Pressure Gauge Gas-Electric Ignition Assembly Lead Sulphide Flame Detector Air Flow Safety Switch Firing Sequence: High-Low-Off with Low Fire Start (Units 60-80) Modulating with Low Fire Start (Units 100-750) 1. Modulating Fifing Sequence (Units 60-80) 2. Gas Controls for Other Than Standard Pressures 3. Gas Controls for Local Utility Requirements PRESSURE ATOMIZING OIL UNITS 20-50 Mechanical Pressure Atomizing Oil Burner for No. 2 Oil 1. High-Low-Off Firing Sequence (Units 40-50) Two Stage Oil Pump Assembly Direct-coupled to Burner Motor 2. Modulating Firing Sequence (Units 40-501 Oil Nozzle (Dual on 40-50 > 3. Lead Sulphide Flame Detector Oil Solenoid Valve Direct Spark Electric Ignition Assembly Photocell Flame Detector Firing Sequence: On-Off with Fined Fire (Units 20-30) On-Off with Low Fire Start (Units40-50) 8. Oil Filter (not mounted i PRESSURE ATOMIZING OIL UNITS 60-150 1. Mechanical Pressure Atomizing Oil Burner tor No. 2 Oil 1. Modulating Firing Sequence (Units 60-80) 2. Two Stage Oil Pump Assembly Mounted on Boiler Skid 2. Oil-Electric Ignition Assembly 3. Variable Flow Oil Nozzle 4. Oil Solenoid Valve 5. Oil Metering Valve 6. Gas-Electric Ignition Assembly 7. Lead Sulphide Flame Detector 8. Air Flow Safety Switch 9. Firing Sequence: High-Low-Off with Low Fire Start (Units 60-80) Modulating with Low Fire Start (Units 100-150) 10. Oil Filter (not mounted; AIR ATOMIZING OIL UNITS 60-750 1. Low Pressure Air Atomizing Oil Burner for No. 6 and Lighter Oil 2. Oil Pump Assembly Mounted on Boiler Skid. For Constant Hot Oil Circu lation (No. 5 & 6 Oil) or Intermittent Operation (No. 2 & 4 Oil) 3. Air Unit Consisting of: Air Compressor; Air Pressure Regulating Valve; Motor; Inlet Air Filter; Air Proving Safety Switch; Air Pressure Gauge; 4. Air-Oil Nozzle 5. Oil Solenoid Valve 6. Oil Metering Valve with Adjustable Cam Operator 7. Gas-Electric Ignition Assembly 8. Lead Sulphide Flame Detector 9. Air Flow Safety Switch. 10. Finng Sequence: High-Low-Off with Low Fire Start (Units 60-80). Modulating with Low Fire Start (Units 100-750) 11. Thermostatically Controlled Electric Oil Heater (No. 4, 5 & 6 Oil). 12. Boiler Mounted Oil Heater (No. 6 Oil Units). Safety Type Below-WaterLine Heater with Pump Control (Water Units); Steam Heater with Modulating Valve and Trap (Steam Units) 13. Oil Strainer (not mounted) 1. Modulating Firing Sequence (Units 60-80) 2. Oil-Electric Ignition Assembly 3. Remote Circulating Oil Pump COMBINATION GAS-OIL UNITS 1. Manual Fuel Changeover Switch in Control Cabinet 13144 KEWANEE SCOTCH GENERATOR DIMENSIONAL DRAWINGS 60 HP thru 760HP 13145 'smucAu* mf -- c: The contractor shall furnish and Instill--:---------Model Ho----------------- ir unit consisting of air compressor, air pressure regulating valve, motor, inlet Kewanee Scotch Generator (s) lor (Ho. (2) (4) (5) (6) oil), (gas), or (com- air niter, air proving safety switch, and air gauge. An oil pump assembly with bination gas-No. (2) (4) (5) (6) oil) firing, the units shill be of three-piss gauges, strainer and relief valvt shall be mounted on the boiler skid. Burner scotch design with witer-cooled retr ind two pisses o( firetubes, ind shill be shall include air-oil atomizing nozzle; oil solenoid valve; oil metering valve with constructed in iccordince with the ASME Code lor OS lbs. steam) (30 lbs. adjustable cam operator; thermostatically controlled electric oil heater (emit hr witer) (ISO lbs. steim). No. 2 oil): gas-electric ignition assembly consisting of a pilot burner. 6000 volt The unit(s) shill hive i gross output rating of not less thin------ (MBh) (Bhp). ignition transformer, automatic gas valve, gas pressure regulator and gas cock; A refractory lined iccess opening with pyres observation port shill be provided to permit entry into the reir combustion dumber. Access to tube sheets ind firetubes for inspection or deining shill be provided without disconnecting my fuel piping or electrieil wiling. Unit shill be of gas-tight construction air now safety switch; lead sulphide (lame detector; tow fire interlock; and all necessary controls and linkages (modulated) (two-position) firing with proved low fire start Fuel-air control shall provide (modulated) (two-position) regula tion of the air damper and the oil control valve by means of a modutrol motor. (Oil burning equipment for No. 6 oil shall include factory mounted and piped throughout Flue doors shill be gasketed ind lined with insuring refractory. (baffled u-tube oil preheater) (safety type oil preheater) complete with neces Units shill be provided with lifting loops ind factory instilled enimeled steel sary temperature control for (below-water line water operation) (steam i jacket with mineral fiber insulition. operation). A control shall be provided for No. 5 and 6 oil to permit continuous All tubes shell be set with roller espinder it eich end. No welding of tubes operation of oil pump and oil preheaters when burner is not running). to the tube sheets nor use of refractory baffling to provide the second or third Note: Specify oil lent beating system to be used. piss will be permitted. Units shall be assembled and wired, with burner, controls, trim, and skid type FOR COMBINATION GAS-PRESSURE ATOMIZING | base installed it the factory. Fuel burning equipment shall be forced draft type: Factory assembled, wired, OIL UNITS 20-60 Gas-oil burner shall consist of a combination multiple-jet flame retention type mounted, and tested. The entire unit shall bear the Underwriters' Laboratories gas burner and mechanical pressure atomizing oil burner for No. 2 oil including label and shall be ready for field connection to power and fuel supply. Equip ment shall include forced draft fan with air damper; dual controls (limit and operating); flame sensing device; and control cabinet containing electronic flame safeguard and programmer, control circuit switch, necessary switching relays, indicating lights for major operations, numbered terminal strip, colorcoded wiring and engraved nameplates. all necessary controls for ``on-off1 type of operation. Gas controls shall include a main gas control group consisting of an automatic operating gas valve, auto matic safety gas valve, gas pressure regulator and gas cock; gas-electric ignition assembly consisting of a 6,000 volt ignition transformer, automatic gas valve, gas pressure regulator and gas cock; air flow safety switch; and flame tod flame detector. Oil controls shall include a two-stage oil pump direct connected All motors shall be for..........volts............ cycle,..........phase operation. Controls to the blower motor; oil atomizing nozzles; oil solenoid valve; 10,000 volt ignition shall be IIS volt. 60 cycle, single phase. Magnetic motor starters with thermal transformer; and photocell flame detector. Changeover from one fuel to the over load protection and a step-down control circuit transformer shall be pro other shall be accomplished by means of a manual fuel selector switch in the vided in the control cabinet when other than 115 volt motors are specified. burner-mounted control cabinet. No changes in linkage, burner position, or Fuel burning equipment shall be set and adjusted by a factory-authorized mechanical adjustment shall be necessary when changing fuels. The fuel representative to burn............... G.P.H. of No. (2) (4) (5) (6) oil (and) (or) selector switch shall provide, through the combustion control relay, proper .................. C.F.H. of.................. Btu/cu. ft. (natural) (manufactured) (L P.) ignition timing lor the fuel being burned. gas having a.................. sp. gr. with....... ...........inches W.C. pressure at inlet ot burner manual gas cock. Unit efficiency, based on flue gas analysis, shall be not less than 80%. FOR COMBINATION GAS-PRESSURE ATOMIZING OIL UNITS 60-150 NOH: Specify jot altitude if over 2.500 fi. ebon see level Gas-oil burner shall consist of a combination annular port flame retention type gas burner and mechanical pressure atomizing oil burner for No. 2 oil including Owner's representative shall be present to receive instructions in care and maintenance of the unit at the time it is started up by the service representative. Contractor shall provide a free service period of 90 days after startup. all necessary controls for (modulated) (two-position) type of operation with proved low fire start. Gas controls shall include a main gas control group con sisting of an automatic motorized gas valve, an automatic safety gas valve, NOH: Select apphceble paragraphs below according to foel and unit sire. The lollow- gas volume control valve with adjustable cam operator, gas pressure regulator, mg conforms to UL reguiremems Specify additional controls it fU or flA insured, gas gauge, and gas cock. Oil controls shall include a two-stage oil pump assem or subject to special local utility reguiremems. bly; oil atomizing nozzle; oil solenoid valve; oil control valve. Controls for both FOR GAS UNITS 20-50 fuels shall include a lead sulphide flame detector; air flow safety switch; low fire interlock; and gas-electric ignition assembly consisting of a pilot burner, Gas burner shall be of the multiple-jet llame retention type including a main 6000 volt ignition transformer, automatic gas valve, gas pressure regulator and gas control group consisting ot an automatic operating gas valve, automatic gas cock. Fuel-air control shall provide (modulated) (two-position) regulation safety gas valve, gas pressure regulator and gas cock; gas-electric ignition of the air damper, the gas volume control valve and the oil control valve by assembly consisting of a 6,000 volt ignition transformer, automatic gas valve, means of a modutrol motor. Changeover from one fuel to the other shall be gas pressure regulator and gas cock; air flow safety switch; flame rod flame accomplished by means of a manual fuel selector switch in the control cabinet detector; and all necessary controls for "on-off" type of operation. No changes in linkage, burner position, or mechanical adjustment shall be FOR GAS UNITS 60-750 necessary when changing fuels. The luel selector switch shall provide, through the combustion control relay, proper ignition timing (or the fuel being burned. Gas burner shall be of the annular port flame retention type including a main gas control group consisting of an automatic motorized gas valve, automatic safely gas valve, gas volume control valve with adjustable cam operator, gas FOR COMBINATION GAS-AIR ATOMIZING OIL UNITS 60-750 pressure regulator, gas gauge, and gas cock; gas-electric ignition assembly Gas-oil burner shall consist of a combination annular port flame retention type consisting of a pilot burner, 6,000 volt ignition transformer, automatic gas valve, gas burner and air atomizing oil burner for No. (2) (4) (5) (6) oil with all gas pressure regulator, and gas cock; air flow safety switch; lead sulphide flame necessary controls for (modulated) (two-position) type of operation with detector; low fire interlock; and all necessary controls and linkage for (modu proved low fire start. Gas controls shall include a main gas control group con lated) (two position) firing with proved low fire start. Fuel-air control shall sisting ot an automatic motorized gas valve, automatic safety gas valve, gas provide (modulated) (two-position) regulation of the air damper and the gas volume control valve with adjustable cam operator, gas pressure regulator, volume control valve by means of a modutrol motor. gas gauge and gas cock. Oil controls shall include an air unit consisting of an air FOR PRESSURE ATOMIZING OIL UNITS 20-50 compressor, air pressure regulating valve, motor, inlet air filter, check valve, air proving safety switch, air gauge; an oil pump assembly and relief valve Oil burner shall be of the mechanical pressure atomizing type for No. 2 oil mounted on the boiler skid; air-oil atomizing nozzle; oil solenoid valve; oil with a two-stage oil pump direct connected to the blower motor. Burner shall metering valve with adjustable cam operator; thermostatically controlled include oil atomizing nozzles; oil solenoid valve; 10,000 volt ignition trans electric oil heater (omit lor No. 2 oil). (Oil burning equipment lor No. 6 oil shall former; photocell flame detector; and all necessary controls for "on-off" type ol operation. include factory mounted and piped (baffled u-tube oil preheater) (safety type oil preheater) complete with necessary temperature control for (below-water FOR PRESSURE ATOMIZING OIL UNITS 60-160 Oil burner shall be of the mechanical pressure atomizing type for No. 2 oil line water operation) isteam operation). A control shall be provided lor No. 5 and 6 oil to permit continuous operation of separate oil pump and oil preheaters when burner is not running). Note: Specify oil tent beating system lobe used. Con with a two-stage oil pump assembly mounted on the boiler skid. Burner shall trols for both fuels shall include lead sulphide flame detector; air flow safety include oil alomizmg nozzle; oil solenoid valve; oil control valve; gas-electric switch; low lire interlock; and gas-electric ignition assembly consisting of a ignition assembly with pilot burner, 6,000 volt ignition transformer, automatic pilot burner, 6000 volt ignition transformer, automatic gas valve, gas pressure gas valve, gas pressure regulator and gas cock; air flow safety switch; lead regulator and gas cock. Fuel-air control shall provide (modulatedi (two-posi sulphide flame detector; low fire interlock; and all necessary controls and tion > regulation of the air damper, the gas volume control valve, and the oil linkage lor (modulated) (two-position) tiring with proved low fire start. Fuel- metering valve by means of a modutrol motor. Changeover from one luel to the air control shall provide (modulated) (two-position) regulation of the air other shall be accomplished by means of a manual fuel selector switch in (he damper and the oil control valve by means of a modutrol motor. control cabinet. No changes in linkage, burner position, or mechanical adjust i FOR AIR ATOMIZING OIL UNITS 60-750 ment shall be necessary when changing fuels. The fuel selector switch shall provide, through the combustion control relay, proper ignition timing for the Oil burner shall be of the air atomizing type for No. (2) (4) (5) (6) oil with an fuel being burned. 13146 IP X 13147