Burnham BOILERS Boiler User Manual
Contents
1. Figure 18 Different Manufacturer s Zone Valve Connections to Honeywell R8889 24 NOTICE The Burnham EC5000 Control includes a water temperature sensor Mount this sensor to the system supply piping 8 Burnham EC5000 Circulator Zoned System Refer 9 Burnham EC5000 Zone Valve Zoned System to Figure 19 of this manual for the electrical Refer to Figure 20 of this manual for the electrical diagram for this type of system Wire the system as diagram for this type of system Wire the system as indicated in that diagram Refer to the manual indicated in that diagram Refer to the manual provided with the Burnham EC5000 Control for provided with the Burnham EC5000 for control control operation and setup details operation and setup details 25 Figure 19 Circulator Zoning with EC5000 Wiring Schematic onewayos Buum 000993 YM pauoz Jaja 9UOoZ 0z NBA ENG N3349 yovg YIJNYNA DdV 113993 aaNddNS sin Jakt aNv aZIS doo 199 434 NOD X08 NOILDONNF 831108 NO ONIHSS YOHSILNY 3SN LoaNNOOSIG AN WA INOZ lt lt L INOZ A8 GaNddNS SWALI 00059 VI Oil Piping A General 1 Use flexible oil line s so that burner can be removed without disconnecting the oil supply 2 A supply line fuel oil filter is recommended as a minimum for all firing rates but a pleated paper fuel oil2. V Electrical DANGER Positively assure all electrical connections are unpowered before attempting installation or service of electrical components or connections of the boiler or building Lock out all electrical boxes with padlock once power is turned off Failure to properly wire electrical connections to the boiler may result in serious physical harm A General 1 3 Install wiring and electrically ground boiler in accordance with requirements of the authority having jurisdiction or in absence of such require ments the National Electrical Code ANSI NFPA 70 and or the CSA C22 1 Electric Code A separate electrical circuit should be run from the main electrical service with a fused disconnect switch in the circuit Wiring should conform to Figure 14 and or 15 B System Controls and Wiring 1 Refer to National Electric Code or Local Electric Codes for proper size and type of wire required Follow Code Use anti short bushings on all wiring passing through boiler jacket junction boxes and or control boxes Use armored cable BX over all exposed line voltage wiring If an Alliance indirect water heater is used use priority zoning Do not use priority zoning for Hydro Air Systems Single Zone System Refer to Figure 14 or 15 of 20 Electrical power may be from more than one source Make sure all power is off before attempting any electrical work Each b
3. INSTALLATION INSTRUCTIONS FOR SHIELD REQUIRED FOR COMBUSTIBLE FLOOR This shield for combustible floors is intended for use only with the following Burnham oil fired boilers Use Part Number 6183504 for the following models RSA H 85 OO RSA H 110 RSA H 125 RSACH 135 ADDS 4 3 16 TO BOILER HEIGHT Use Part Number 6183505 for the following models RSA170 RSA195 RSA240 RSA285 ADDS 5 3 8 TO BOILER HEIGHT 1 Place shield on combustible floor with TOP surface shifting position during setting of boiler upward and FRONT surface directly below the expected position of the oil burner 4 Set boiler squarely on top of shield such that base plate of boiler rests flat on top surface of shield and does not 2 Locate shield such that clearances to combustible walls over hang shield on any side Confirm clearance to are as indicated in Figure 24 These dimensions will combustible walls Refer to Figure 2 assure that the boiler jacket will be at least 18 from the side and rear walls and 48 from the front wall as 5 Do not enclose boiler including shield on all four required by ANSI NFPA 31 sides Boiler may be enclosed on any three sides while maintaining minimum clearance shown in Figure 24 3 Fasten shield to combustible floor to keep shield from for each of those three sides COMBUSTIBLE WALLS Figure 24 35 VIII Service and Cleaning NOTICE BURNER SHUTDOWN Open Service Switch to turn off burn
4. start Operate boiler until the system water temperature reaches its normal operating range Adjust the valves to maintain 180 F to 200 F boiler water temperature and greater the 120 F return temperature Adjust both valves simulta neously Closing the boiler return valve while opening the bypass valve will raise the boiler return temperature Opening the boiler return valve while closing the by pass valve will lower the boiler return temperature A water boiler installed above radiation level must be provided with a low water cutoff device as part of the installation AND B SHUT OFF VAI AND IN SUMMER 2er AND D SHUT I AND CLUSED IN SUMMER VALVES AR X HEA IPEN IN WIN CIRCULATOR URN MAIN AND Cl OM CUMBIN SYSTEM Figure 7 Recommended Piping for Combination Heating and Cooling Refrigeration System Install Pressure Relief Valve See Figures 8 and 9 Pressure Relief Valve must be installed with spindle in the vertical position Installation of the relief valve must be consistent with ANSI ASME Boiler and Pressure Vessel Code Section IV 13 C D Install Drain Valve in return piping See Figures 8 and 9 Oil grease and other foreign materials which accumu late in new hot water and a new or reworked system should be boiled out and then thoroughly flushed A qualified water treatment chemical specialist should be consulted for re
5. AF60XP SF60FY Spec No 647104 647106 647201 1 Air Band 3492 3492 3217 Air Band Nut 4150 4150 460 Air Band Screw 4198 4198 4219 2 Air Shutter 3494 3494 3215 Air Shutter Screw 4198 4198 493 6 Blower 2459 2459 2288 7 Bulkhead Fitting 3488 3488 3488 8 Bulkhead Fitting Locknut 3666 3666 3666 9 Connector Tube Assembly 5636 5636 5636 10 Coupling 2454 2454 2433 11 Electrode Clamp 149 149 149 Electrode Clamp Screw 4219 4219 4219 12 Electrode Insulator Assembly EA21502 EA21502 E21502 15 Spider Spacer Assembly 5653 5653 5653 16 Escutcheon Plate 3493 3493 3493 18 Flange and Air Tube Assembly 58115 58115 58115 Gasket 3616 3616 3616 19 Head 360012 360022 5434 Head Screws 4221 4221 4221 Hole Plug 2139 2139 2139 20 Housing Assembly w Inlet Bell 5624 5624 53485 21 Motor 2456 2456 2364 22 Nozzle Adapter 213 213 213 23 Nozzle Line Electrode Assembly NC6048 NC6058 NC6048 25 Pump 2460 2460 2460 27 Static Plate 3383 3383 3383 28 Ignitor 7440 7440 7440 29 Ignitor Hinge Screw 4217 4217 4217 30 Ignitor Holding Screw 4198 4198 4198 31 Ignitor Gasket Kit 51304 51304 51304 32 Wire Guard 3345 3345 3345 46 Ordering Information for Quality Replacement Parts Figure 30 BECKETT AF and SF MODEL BURNERS 47 48
6. BOILERS FOR REPLACEMENT OIL BURNER PARTS CONTACT YOUR WHOLESALER OR THE BURNER MANUFACTURER R W BECKETT CORP 38251 CENTER RIDGE RD P O BOX 1289 ELYRIA OHIO 44036 1 800 645 2876 NOTE When ordering parts always give the serial and model numbers shown on the boiler and burner Also provide the name of the part s and part s number as listed below Boiler Model Burner Model Air Tube Combination Spec No Air Band Air Band Nut Air Band Screw Air Shutter Air Shutter Screw Blower Bulkhead Fitting Bulkhead Fitting Locknut Connector Tube Assembly Coupling Electrode Clamp Electrode Clamp Screw Electrode Insulator Assembly Spider Spacer Assembly Escutcheon Plate Flange and Air Tube Assembly Gasket Head Head Screws Hole Plug Housing Assembly w Inlet Bell Motor Nozzle Adapter Nozzle Line Electrode Assembly Pump Static Plate Ignitor Ignitor Hinge Screw Ignitor Holding Screw Ignitor Gasket Kit Wire Guard Baffle RSA85 RSA110 RSA125 RSA135 AFG AFG AFG AFG AF60BN AF60XN AF60J2 AF60JZSS BCB6201 BCB6202 BCB6203 BCB6204 3492BKA 3492BKA 3492BKA 3492BKA 4150 4150 4150 4150 4198 4198 4198 4198 3709BK 3709BK 3709BK 3709BK 4198 4198 4198 4198 2999 2999 2999 2999 3488 3488 3488 3488 3666 3666 3666 3666 5636 5636 5636 5636 2454 2454 2454 2454 149 149 149 149 4219 4219 4219 4219 EA21502 EA21502 EA21502 EA21502 5653 5653 5653 5653 3493 3493 3493 3493 3146812 3146812 3146812 3146812 314
7. boiler or controls Retain your contractor or a competent serviceman to assure that the unit is properly adjusted and maintained Have Firetubes cleaned at least once a year preferably at the start of the heating season to remove soot and scale The inside of combustion chamber should also be cleaned and inspected at the same time Have Oil Burner and Controls checked at least once a year or as may be necessitated Do not operate unit with jumpered or absent controls or safety devices Do not operate unit if any control switch component or device has been subject to water WARNING Appliance materials of construction products of combustion and the fuel contain alumina silica heavy metals carbon monoxide nitrogen oxides aldehydes and or other toxic or harmful substances which can cause death or serious injury and which are known to the state of California to cause cancer birth defects and other reproductive harm Always use proper safety clothing respirators and equipment when servicing or working nearby the appliance This boiler contains very hot water under high pressures Do not unscrew any pipe fittings nor attempt to disconnect any components of this boiler without positively assuring the water is cool and has no pressure Always wear protective clothing and equipment when installing starting up or servicing this boiler to prevent scald injuries Do not rely on the pressure and temperature gauges to determine the temperature a
8. ii Fuel line leak due to crushed or bent tubing iii Filter connection leaks iv Tank connection leaks The following actions can eliminate air leaks i Bleed pump as detailed in System Start Up Section of this manual ii Replace flare fittings iii Replace oil supply line iv Repair oil filter leaks v Replace or repair tank fittings e GASKET LEAKS If 11 5 to 12 5 CO with a 1 smoke cannot be obtained in stack look for air leaks around the canopy seal Such air leaks will cause a lower CO reading in the stack The smaller the firing rate the greater effect an air leak can have on CO readings f DIRT A fuel filter is a good investment Accidental accumulation of dirt in the fuel system can clog the nozzle strainer and produce a poor spray pattern from the nozzle g WATER Water in the fuel in large amounts will stall the fuel pump Water in the fuel pump in smaller amounts will cause excessive wear on the pump but more importantly water does not burn It chills the flame causes smoke and allows unburned fuel to pass through the combustion chamber and clog the flueways of the boiler h COLD OIL If the oil temperature approach ing the fuel pump is 40 F or lower poor combustion or delayed ignition may result Cold NOTICE CHECK TEST PROCEDURE A very good test for isolating fuel side problems is to disconnect the fuel system and with a 24 length of tubing fire out of an auxiliary
9. 98 31498 31498 31498 360003 360003 360006 360006 4221 4221 4221 4221 2139 2139 2139 2139 5624 5624 5624 5624 2456 2456 2456 2456 213 213 213 213 NC6058 NC6058 NC6058 NC6048 2460 2460 2460 2460 31646 3383P 31646 31646 7440 7440 7440 7440 4217 4217 4217 4217 4198 4198 4198 4198 51304 51304 51304 51304 3345 3345 3345 3345 3708 N A N A N A 44 Ordering Information for Quality Replacement Parts SQUARE PLATE ASSEMBLY r ESCUTCHEON PLATE FOR FIXED HEADS RANSF ORMER m KNURLED NU ASSEMBLY AIR TUBE RANSFORMER GASK ASSEMBLY ASSEMBLY COMBUSTION PLUG AN EAD f LOW FIRING RATE BAFI CINSIDE HOUSING NOZZLE LI ELEC ASSEMBLY MOUNTIN FLANGE CONNECTOR FUEL TUBE 2 EE a TITTI SIDE VIEW FRON mi NOZZLE LINE ELECTRODE N eet an J assedi BULKHEAD ASSEMBLY YA LI T S Lo QL N pe kas n mo e a l Li A ELECTRODE Ye m 2 2 n ere CLAMP SCREW DK SPIDER SPACER STATIC PLATE KNURLED NUT ASSEMBLY Figure 29 BECKETT AFG MODEL BURNER 45 BECKETT BURNER PARTS LIST FOR RSA SERIES STEEL BOILERS FOR REPLACEMENT OIL BURNER PARTS CONTACT YOUR WHOLESALER OR THE BURNER MANU FACTURER R W BECKETT CORP 38251 CENTER RIDGE RD P O BOX 1289 ELYRIA OHIO 44036 1 800 645 2876 Boiler Model RSA170 RSA195 RSA240 285 Burner Model AF AF AF Air Tube Combination AF60XO
10. Offices A Burnham Corporation Central amp Western Regions C Burnham Corporation Metropolitan Region P O Box 3079 P O Box 3079 Lancaster PA 17604 3079 Lancaster PA 17604 3079 Phone 717 481 8400 Phone 717 481 8400 FAX 717 481 8408 FAX 717 481 8409 Burnham Sales Corporation Northeast Region Burnham Corporation Mid Atlantic Region 19 27 Mystic Avenue P O Box 3079 Somerville MA 02145 Lancaster PA 17604 3079 Phone 617 625 9735 Phone 717 481 8400 FAX 617 625 9736 FAX 717 481 8409 Contact Regional Office Indicated for your State Alabama A Nebraska A Oregon Arizona A New Hampshire B Rhode Island Arkansas A New Jersey South Carolina ojlo California Atlantic Burlington Camden South Dakota Colorado Cape May Cumberland Tennessee Connecticut Gloucester Mercer Texas Delaware Monmouth Ocean Salem Utah Dy rl ry gt ry gt Florida Counties Vermont Georgia All other Counties C Virginia Hawaii New Mexico Arlington Acco mack Clarke Idaho gt New York Fairfax Frederick Fauquier gt Illinois Albany Fulton Montgomery Loudoun Northampton and gt Indiana Rensselaer Saratoga Prince William Counties gt lowa Schenectady Schoharie All other Counties gt Kansas Warren Washington Counties Washington Kentucky All Other Counties C Washington D C Louisiana A North Carolina A West Virginia Maine B North Dakota A Wiscon
11. Price 3 00 INSTALLATION OPERATING AND SERVICE INSTRUCTIONS FOR RSA BOILERS CBurnham AMERICA S BOILER COMPANY Burnham Corporation Lancaster PA 17604 3079 IMPORTANT INFORMATION READ CAREFULLY All boilers must be installed in accordance with National State and Local Plumbing Heating and Electrical Codes and the regulations of the serving utilities These Codes and Regulations may differ from this instruction manual Authorities having jurisdiction should be consulted before installations are made In all cases reference should be made to the following Standards All wiring on boilers installed in the USA shall be made in accordance with the National Electrical Code and or Local Regulations All wiring on boilers installed in Canada shall be made in accordance with the Canadian Electrical Code and or Local Regulations USA BOILERS A Current Edition of American National Standard ANSI NFPA 31 Installation of Oil Burning Equipment for recommended installation practices B Current Edition of American National Standard ANSI NFPA 211 Chimneys Fireplaces Vents and Solid Fuel Burning Appliances For Venting requirements C Current Edition of American Society of Mechanical Engineers ASME CSD 1 Controls and Safety Devices for Automatically Fired Boilers for assembly and operations of controls and safety devices CANADIAN BOILERS A Current Edition of Canadian Standards Association CSA B139 Install
12. S CHECK THERMOSTAT OPERATION Raise and lower thermostat setting as required to start and stop burner VERIFY PRIMARY CONTROL SAFETY FEA TURES using procedures outlined in Instructions furnished with control See back of Control Cover or Instructions as follows a Simulate flame failure e Follow the starting procedure to turn on the burner e Close the hand valve in the oil supply line e Safety switch should lock out in approxi mately 15 seconds Ignition should stop and oil valve should close Blower will stop after postpurge period e Push red reset button to reset safety switch b Simulate ignition failure e Follow the starting procedure to turn on the burner but do not open the oil supply hand valve e Safety switch should lock out in approxi mately 15 seconds Ignition and motor should stop and oil valve should close e Push red reset button to reset safety switch c Simulate power failure e Follow the starting procedure to turn on the burner e With the burner running turn off the power to the system by tripping the circuit breaker or removing the fuse Burner should stop e Restore power Burner should start 3 VERIFY HIGH LIMIT OPERATION a Adjust thermostat to highest setting b Observe temperature gauge When temperature is indicated adjust limit to setting below observed temperature Burner should stop c Adjust limit to setting above observed tempera ture Burner shoul
13. TILATION AIR Local code provisions may apply and should be referenced Determine volume of space boiler room Rooms communicating directly with the space in which the appliances are installed through openings not fur nished with doors are considered a part of the space Volume ft Length ft x Width ft x Height ft Determine total input of all appliances in the space Add inputs of all appliances in the space and round the result to the nearest 1000 BTU per hour Determine type of space Divide Volume by total input of all appliances in space If the result is greater than or equal to 50 ft 1000 BTU per hour then it is considered an unconfined space If the result is less than 50 ft 1000 BTU per hour then the space is considered a confined space For boiler located in an unconfined space of a conven tionally constructed building the fresh air infiltration through cracks around windows and doors normally provides adequate air for combustion and ventilation For boiler located in a confined space or an unconfined space in a building of unusually tight construction provide outdoor air with the use of two permanent openings which communicate directly or by duct with the outdoors or spaces crawl or attic freely communi cating with the outdoors Locate one opening within 12 inches of top of space Locate remaining opening within 12 inches of bottom of space Minimum dimension of air opening is 3 inches Size each ope
14. any signs of damage 1 ALL EQUIPMENT is carefully manufactured inspected and packed Our responsibility ceases upon delivery of the crated boiler to the carrier in good condition ANY CLAIMS for damage or shortage of shipment must filed immediately against the carrier by the consignee No claims for variances from or shortage in orders will be allowed by the manufac turer unless presented within sixty 60 days after receipt of goods B LOCATE BOILER in front of final position before removing crate NOTE LOCATE so that smoke pipe connection to chim ney will be short and direct BOILER IS NOT SUITABLE FOR INSTALLATION ON COMBUS TIBLE FLOOR unless combustible floor shield Z LA Y a mern supplied by Burnham is used DO NOT install on carpeting FOR BASEMENT INSTALLATION provide a solid base such as concrete if floor is not level or if water may be encountered on floor around boiler PROVIDE SERVICE CLEARANCE of at least 48 from the front of the jacket for servicing of burner and removal of tankless heater For minimum clearances to combustible materials See Figure 2 oa 18 T fi G Far a 18 me lt a Fe z hee CA Sy pa aa EL ez e e FRONT VIEW I FLOOR LIN m a 13 ponm er Wa C GGG td QS _ 0 Se 7 a 3 T RIGHT SIDE VIEW Figure 2 Minimum Clearanc
15. ation Code for Oil Burning Equipment for recommended Installation Practices The following terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning product life DANGER CAUTION Indicates an imminently hazardous situation Indicates a potentially hazardous situation which if not avoided will result in death which if not avoided may result in serious injury or substantial property moderate or minor injury or property damage damage WARNING NOTICE Indicates a potentially hazardous situation Indicates special instructions on which if not avoided could result in death installation operation or maintenance serious injury or substantial property which are important but not related to damage personal injury hazards NOTICE This boiler has a limited warranty a copy of which is printed on the back of this manual It is the responsibility of the installing contractor to see that all controls are correctly installed and are operating properly when the installation is complete The warranty for this boiler is valid only if the boiler has been installed maintained and operated in accordance with these instructions DANGER DO NOT store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance WARNING Improper installation adjustment alteration service or maintenance can cause property dama
16. ation of boiler water or scale lime build up caused by frequent addition of water A Design a piping system and install boiler which will prevent oxygen contamination of boiler water and frequent water additions inch clearance from hot water piping to combus tible materials a If this boiler is used in connection with refrig 1 There are many possible causes of oxygen contami nation such as a Addition of excessive make up water as a result of system leaks b Absorption through open tanks and fittings c Oxygen permeable materials in the distribution system 2 In order to insure long product life oxygen sources should be eliminated This can be accomplished by taking the following measures a Repairing system leaks to eliminate the need for addition of make up water b Eliminating open tanks from the system c Eliminating and or repairing fittings which allow oxygen absorption d Use of non permeable materials in the distribu tion system e Isolating the boiler from the system water by installing a heat exchanger WARNING System supply and return piping must be connected to correct boiler pipe Burnham recommends sizing the system circulator to supply sufficient flow GPM to allow a 20 F temperature differential in the system When sizing the system circulator the pressure drop of all radiators baseboard and radiant tubing and all connecting piping must be consi
17. ation of the boiler See Figure 12 for recommended installation a Install a draft regulator supplied by installer following the instructions furnished with the regulator See Figure 13 for alternate regulator locations b With any new or replacement installation the chimney has to be considered Chimneys that have a high heat loss become less suitable as the heat loss of the home goes down and the efficiency of the boiler goes up Most homes have a chimney appropriate for the fuel and the era in which the home was built That may have been a coal fired or an inefficient oil fired boiler built into a home without insulation or storm windows With increasing fuel prices that home probably has been insulated and fitted with storm windows so that the heat loss of the home has been reduced This requires less fuel to be burned and sends less heat up the chimney A new boiler probably has a higher efficiency means that the stack temperature from the new boiler will be lower than that from the old boiler and with less room air being drawn up the chimney to dilute the stack gases The combina tion of a large uninsulated chimney reduced firing rate reduced firing time lower stack temperature and less dilution air can in some cases contribute to the condensing of small amounts of water vapor in the chimney Such condensation when it occurs can cause chim ney deterioration In extreme cases the chim ney may have to be lined to insula
18. commendations regarding appropriate chemical compounds and concentrations which are compatible with local environmental regulations After the boiler and system have been cleaned and flushed and before refilling the entire system add appropriate water treatment chemicals if necessary to bring the pH between 7 and 11 IF REQUIRED Figure 8 Recommended Boiler Piping for Circulator Zoned Heating Systems Figure 9 Boiler Piping for Zone Valve Zoned Heating Systems F CONNECT TANKLESS HEATER PIPING AS 2 TEMPERING OF HOT WATER Installation of SHOWN IN FIGURE 11 See Table 1 for Tankless an automatic mixing valve will lengthen the Heater Rating delivery of the available hot water by mixing some cold water with the hot This prevents the possibil ity of scalding hot water at the fixtures In addition savings of hot water will be achieved since the user will not waste as much hot water while seeking a water temperature Higher temperature hot water required by dishwashers and automatic washers is possible by piping the hot water from the heater prior to entering the mixing valve The mixing valve should be trapped by installing it below the cold water inlet to heater to prevent lime formation in the valve Refer to Figure 11 3 FLUSHING OF HEATER All water contains some sediment which settles on the inside of the coil Consequently the heater should be periodi cally backwashed This is accomplished b
19. cu larly to well water An appropriate water softener should be installed based on the analysis and dealer s recommendation This is not only benefi cial to the tankless heater but to piping and fixtures variations in the range of 20 to 125 psi plus the many other benefits derived from soft water HERMOMETER CIRCULATOR O zel Br L AT j UDI m SUPPLY VALVE 3YPASS RETURN A VALVE O SYSTEM DRAIN 4 Ali e COCK tane HA bad RETURN VALVE Figure 10 Recommended System Bypass Piping 16 SAFETY RELIEF VALVE TEMPERED HO O FAUCETS AND SHOWERS Figure 11 Schematic Tankless Heater Piping Table 1 Tankless Heater Ge eae a O Boiler Model Lem De Dem en RSA110 H 125 amp 135 i 16 SERIA STD 7524 OPT 7530 oller Mode RSO 70 25 26 17 IV Venting A General Guidelines than the boiler being replaced That probably 1 Vent system installation must be in accordance with these instructions and applicable provisions of local building codes Contact local building or fire officials about restrictions and installation inspec tion in your area The RSA Series is designed to be vented into a fireclay tile lined masonry chimney or chimney constructed from type L vent or a factory built chimney that complies with the type HT require ments of UL103 The chimney or vent pipe shall have a sufficient draft at all times to assure safe proper oper
20. d connect the Alliance thermostat and circulator to the Zone 1 terminals of the R8889 Set thermostat anticipator settings to 0 12 amps ITEMS SUPPLIED BY INSTALLER POWER SUPPLY SAL JUMPER SUPPLIED 3 YWE 3Y HONEY NER TION BOX DIAGRAM LEGEND W VOLTACE SIZE 18 2 AWG ED CIRCU LINE VOLTAGE S TYPE TW OR TEW TYPE LINE VO Tere IYPE TW NOTES F ANY OF THE ORIGINAL N MUST BE REPLACED IT MUST BE W S OR EQUIVALENT Figure 14 RSAL Wiring Less Tankless Single Circulator SCHEMATIC DIAGRAM LEGEND LIMITED CIP Figure 15 RSAT or RSAR Wiring with Tankless Single Circulator 21 USE ANTIS NA USE ARMOUR EXPOSED Esa TION gt SUPPLIED BY INSTALLER FIELD INSTAL FACTORY AL ELECT FOR COD E AND TYPE 2 AL JUMPER e BURNER WIRE MOTOR Figure 16 Circulator Zoned Wiring for Honeywell R8888 HONEYWELL OIL BU PRIMARY R4184D 68884 410 Bun pouoz SAJBA 9QUOZ 44 N YOLINSI AA0D AHIM 44442 qaaainoa ddA GSYINDAY S 3 WNOILIGGY NY SINOZ af ON 318v9 ajan NO ES2 LORANG VC VALVI ces GRAY Li 118 BLACK BLUE BROWN WHITE m D so ES2 RED O YELLO YELL J m 0 N D amp pou 1 n ORD 2
21. d start d Adjust thermostat to lowest setting Adjust limit to desired setting 34 4 CHECK LOW WATER CUTOFF if so equipped a Adjust thermostat to highest setting b With boiler operating open drain valve and slowly drain boiler c Burner should stop when water level drops below low water cutoff probe Verify limit thermostat or other controls have not shut off boiler d Adjust thermostat to lowest setting Refill boiler Q Boiler is now ready to be put into service A leaky system will increase the volume of make up water supplied to the boiler which can significantly shorten the life of the boiler Entrained in make up water are dissolved minerals and oxygen When the fresh cool make up water is heated in the boiler the minerals fall out as sediment and the oxygen escapes as a gas Both can result in reduced boiler life The accumulation of sediment can eventually isolate the water from contacting the steel When this happens the steel in that area gets extremely hot and eventually cracks The presence of free oxygen in the boiler creates a corrosive atmosphere which if the concen tration becomes high enough can corrode the steel through from the inside Since neither of these failure types are the result of a manufacturing defect the warranty does not apply Clearly it is in everyone s best interest to prevent this type of failure The maintenance of system integrity is the best method to achieve this
22. dered 3 Connect System supply and return piping to boiler See Figures 8 and 9 Also consult I B R Installa tion and Piping Guides Maintain minimum 1 2 12 eration systems the boiler must be installed so that the chilled medium is piped in parallel with the heating boiler using appropriate valves to prevent the chilled medium from entering the boiler See Figure 7 Also consult I B R Installation and Piping Guides If this boiler is connected to heating coils located in air handling units where they may be exposed to refrigerated air the boiler piping must be equipped with flow control valves to prevent gravity circulation of boiler water during the operation of the cooling system If boiler is used with an Alliance Indirect Fired Domestic Water Heater install the Alliance as a separate heating zone Refer to the Alliance Installation Operating and Service Instructions for additional information Use a system bypass if the boiler is to be operated in a system which has a large volume or excessive radiation where low boiler water temperatures may be encountered i e converted gravity circulation system etc The bypass should be the same size as the supply and return lines with valves located in the bypass and return line as illustrated in Figure 10 in order to regulate water flow for maintenance of higher boiler water temperature Set the bypass and return valves to a half throttle position to
23. e and readjust oil pressure If dripping or after burn persist replace fuel pump instrumentation to obtain a CO of 11 5 to 12 5 with draft of 02 w c in fire box These settings will assure a safe and efficient operating condition If the flame appears stringy instead of a solid flame try another nozzle of the same type Flame should be solid and compact After all adjustments have been made recheck for a draft of 02 w c over the fire 4 TURN OFF BURNER and remove pressure gauge Install gauge port plug and tighten Start burner again M FLAME FAILURE The RSA boiler controls operate the burner automati cally If for unknown reasons the burner ceases to fire and the rest button on the primary control has tripped the burner has experienced ignition failure Before pressing the rest button call your serviceman immedi ately N 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 Usually cycling the burner operation about 5 to 10 times will rid oil line of this air 32 a O HINTS ON COMBUSTION NOZZLES Although the nozzle is a relatively inexpensive device its function is critical to the successful operation of the oil burner The selection of the nozzle supplied with the RSA boil
24. el i e natural gas LP propane All flammable debris rags paper wood scraps etc should be kept clear of the boiler at all times Keep the boiler area clean and free of fire hazards Do not operate boiler on combustible floor without a factory supplied floor shield Concrete over wood joists is considered combustible flooring Do not operate on masonry floors which may contain moisture Tables of Contents L Pre Installation i 7 ME PIPI piena 28 II Knockdown Boiler Assembly 9 VIL System Start Up ii 30 III Water Piping and Trim 12 VII Service and Cleaning 36 IV MV aaa 18 IX Repair Parts a icc soci ses 38 V Electrical and Sequence of Operation 20 Figure 1 RSA Packaged Boiler RSA85 RSA135 5 TO CEILING OUTLET 23 SUPPLY CONNECTION THERALTIMETER N _ 14 RETURN CONNECTION x AC DRAIN 283 CIRCULATOR FRONT VIEW oe See 7 SIDE VIEW Figure 1A RSA Packaged Boiler RSA170 RSA285 Boiler Minimum Chimney Sizes Water Approx Bare Boiler oa Model Assembly In x In x Ft In dia x Ft Capacity Shipping Number height height Gallons Weight RSA240 WV 29 16A 8x 12 x 20 660 Ib RSA285 WV 29 19A 8x 12 x 20 690 Ib I Pre Installation A INSPECT SHIPMENT carefully for
25. equire any field lubrication Water lubricated circulators do not need field lubrication SET CONTROLS with burner service switch turned OFF 1 SET ROOM THERMOSTAT about 10 above room temperature 2 PRESS RED RESET BUTTON on R4184D Oil Primary Control and release 3 SET HIGH LIMIT dial on L8124C L8148A at temperature to suit requirements of installation REMOVE GUN ASSEMBLY 1 Check nozzle size head size gun setting and positioning of electrodes This information is shown in Figure 23 and Tables 4 and 4A 2 Reinstall gun assembly VERIFY OIL BURNER SETTINGS BEFORE STARTING 1 BURNER AIR BAND AND AIR SHUTTER SETTINGS see Tables 4 and 4A 2 OPENALL OIL LINE VALVES 3 Attach a plastic hose to fuel pump vent fitting and provide a container to catch the oil 4 REMOVE GAUGE PORT PLUG from fuel pump and install pressure gauge 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 Table 4 Beckett AFG AF amp SF Burners Boiler Model Firing Rate GPH RSA85 75 x 70B 1 RSA110 90 x 80B RSA125 1 0 x 80B 0 7 RSA170 1 65 80 A 7 RSA195 2 00 80 B 7 RSA240 2 50 80 B 7 Table 4A Becket AFG Burner Boiler Model RSAH85 Firing Rate 65 x 80B RSAH125 RSAH135 90 x 80B 1 0 x 80B 1 25 SOLID stream without air bubbles for approxi mately 10 seconds 1 3 Close vent f
26. er Manual Oil Supply Valve should be closed and Electric Service to boiler turned off if boiler will not be operated for an extended period of time A General Inspection service and cleaning should be conducted annually Turn off electric power and close oil supply valve while conducting service or mainte nance B Firetubes and Combustion Chamber See Figure 25 1 CLEAN THE FIRETUBES a Disconnect electric to burner and remove stack b For access to the firetubes pull top jacket panel off Loosen wing nuts that hold canopy down Without taking wing nuts off carriage bolts disengage bolts from slots on tubesheet Pull canopy off c Remove turbulators d Using a firetube brush clean firetubes DO NOT extend brush past the end of the bottom tubesheet e Assemble the boiler in reverse order Units should be cleaned at least once a year preferably at the end of each heating season It is not necessary to remove burner to clean boiler Brush scrape or vacuum from top ECTRICAL POWER Figure 25 Cleaning of RSA Boiler 36 IX Repair Parts All RSA Repair Parts may be obtained through your local Burnham Wholesale distributor Should you require assistance in locating a Burnham distributor in your area or have questions regarding the availability of Burnham products or repair parts please contact your Burnham Regional Sales Office as listed below Burnham Corporation Regional
27. er is the result of extensive testing to obtain the best flame shape and efficient combustion Other brands of the same spray angle and spray pattern may be used but may not perform at the expected level of CO and smoke Nozzles are delicate and should protected from dirt and abuse Nozzles are mass produced and can vary from sample to sample For all of those reasons a Spare nozzle is a desirable item for a service man to carry FLAME SHAPE Looking into the combus tion chamber through the flame plug hole the flame should appear straight with no sparklers rolling up toward the top of the chamber If the flame drags to the right or left sends sparklers upward or makes wet spots on the combustion chamber the nozzle should be replaced If the condition persists look for fuel leaks air leaks water or dirt in the fuel as described below FUEL LEAKS Any fuel leak between the pump and the nozzle will be detrimental to good combustion results Look for wet surfaces in the air tube under the ignitor and around the air inlet Any such leaks should be repaired as they may cause erratic burning of the fuel and in the extreme case may become a fire hazard d AIR LEAKS Any such leaks should be repaired as they may cause erratic burning of the fuel and in extreme cases may become a fire hazard There may be many possible causes of leaks in oil lines such as i Fitting leaks due to misflared tubing or damaged fitting
28. es to Combustible Materials 1 Listed clearances comply with American National Standard ANSI NFPA 31 Installation of Oil Burning Equipment 2 RSA boilers can be installed in rooms with clearances from combustible material as listed above Listed clearances can not be reduced for alcove or closet installations 3 For reduced clearances to combustible material protection must be provided as described in the above ANSI NFPA 31 standard 7 C PROVIDE AIR SUPPLY AND VENTILATION to accommodate proper combustion If natural ventila tion is inadequate provide a screened opening or duct from the boiler room to the outside The opening or duct must be sized so the boiler input will not exceed 4 000 BTUH Sq In of free area If other air consum ing appliances are near the boiler the air inlet should be larger Consult respective manufacturers VENTILATION AIR must be provided to maintain the ambient temperature at safe limits Local and national codes may apply and should be referenced 1 In unconfined spaces basement in buildings of conventional frame brick or stone construction infiltration normally is adequate to provide air for ventilation 2 In confined spaces two permanent openings one near the top of the enclosure and one near the bottom shall be provided Each opening shall have a free area of not less than 1 sq inch per 1000 BTUH of the total input of all appliances in the space PROVIDE COMBUSTION AND VEN
29. filter is recommended for the lowest firing rate application to prevent nozzle fouling 3 Use Flared fittings only Do not use compression B Single pipe Oil Lines 1 Standard burners are provided with single stage 3450 rpm fuel units with the bypass plug removed for single pipe installations The single stage fuel unit may be installed single pipe with gravity feed or lift Maximum allowable lift is 8 feet See Figure 21 NOTICE fittings 4 Use of a high efficiency micron filter Garber or Oil piping must be absolutely airtight or equivalent in addition to conventional filter is leaks or loss of prime may result Bleed line highly recommended and fuel unit completely Ne AK A VENT del i MIN FILI D IN PIPE SE j Y A a u u Pag Figure 21 Single Pipe Installation 28 TABLE 2 SINGLE STAGE UNITS 3450 RPM TWO PIPE SYSTEMS Maximum Length of Tubing Lift H H RI See Figure TABLE 3 TWO STAGE UNITS 3450 RPM TWO PIPE SYSTEMS Maximum Length of Tubing Lift pal tH pu See Figure See Figure a lt See Figure 3 8 OD 1 2 OD Tubing 3 GPH Tubing 3 GPH o f e f o 1 78 100 100 100 100 100 100 100 100 100 100 3 8 OD 1 2 OD W ao N i rirpjlofo afsfa faf o N tQ R N NNNJ S 2 100 C Two Pipe Oil Lines 1 For two piped systems where mo
30. five gallon pail of clean fresh warm 2 oil from another source If the burner runs successfully when drawing out of the auxiliary pail then the problem is isolated to the fuel or fuel lines being used on the jobsite 33 oil is harder to atomize at the nozzle Thus the spray droplets get larger and the flame shape gets longer An outside fuel tank that is above grade or has fuel lines buried in the ground above the frost line is a good candidate for cold oil The best solution is to place the tank and oil lines in the ground below the frost line i HIGH ALTITUDE INSTALLATIONS Typically the rule to use for high altitudes is to increase the air supply by 4 per each 1000 ft above 2000 ft altitude from sea level This means that the air setting will have to be higher than the calibration marks in proportion to the altitude Use instruments and set for 11 5 to 12 5 CO j START UP NOISE Late ignition is the cause of start up noises If it occurs recheck for electrode settings flame shape air or water in the fuel lines k SHUT DOWN NOISE If the flame runs out of air before it runs out of fuel an after burn with noise may occur That may be the result of a faulty cut off valve in the fuel pump or it may be air trapped in the nozzle line It may take several firing cycles for that air to be fully vented through the nozzle Water in the fuel or poor flame shape can also cause shut down noises P TEST CONTROL
31. ge personal injury or loss of life Failure to follow all instructions in the proper order can cause personal injury or death Read and understand all instructions including all those contained in component manufacturers manuals which are provided with the appliance before installing starting up operating maintaining or servicing this appliance Keep this manual and literature in legible condition and posted near appliance for reference by owner and service technician This boiler requires regular maintenance and service to operate safely Follow the instructions contained in this manual Installation maintenance and service must be performed only by an experienced skilled and knowledgeable installer or service agency All heating systems should be designed by competent contractors and only persons knowledgeable in the layout and installation of hydronic heating systems should attempt installation of any boiler It is the responsibility of the installing contractor to see that all controls are correctly installed and are operating properly when the installation is completed Installation is not complete unless a pressure relief valve is installed into the tapping located on top of appliance See Section Ill of this manual for details This boiler is not suitable for installation on combustible flooring unless installed with a combustible floor shield available at extra cost Do not install boiler on carpeting Do not tamper with or alter the
32. interlocked with the equipment to open automatically during equipment operation II Knock Down Boiler Assembly A REMOVAL OF BOILER 1 Remove all boiler to skid hold down fasteners Refer to Figure 3 2 Carefully walk boiler to the edge of skid Tilt the boiler back allowing an edge to rest on the floor and remove the skid Figure 3 Base on Skid B TEST HEAT EXCHANGER FOR LEAKS before proceeding with jacket assembly Heat exchanger canopy and base are preassembled 1 Install pressure gauge supplied a hose to the city water and a valve in the supply tapping Plug remainder of tappings 1 Before jacket can be secured to boiler assembly tankless heater coil or blank plate must be attached Using rubber gasket and bolts provided secure heater coil or blank plate to boiler extension by inserting the bolts from the backside of the exten sion Refer to Figure 4 H INSTALLING THE JACKET 2 Fill boiler with water and apply a pressure of at least 10 psig but no more than 30 psig Figure 5 Burner Mounting 10 LL e Figure 6 RSA Jacket Assembly III Water Piping and Trim WARNING Failure to properly pipe boiler may result in improper operation and damage to boiler or structure Oxygen contamination of boiler water will cause corrosion of iron and steel boiler components and can lead to boiler failure Burnham s Standard Warranty does not cover problems caused by oxygen contamin
33. iping Note Terminate hose at a suitable floor drain or outdoor area 4 Starting with one circuit at a time open zone valve or valve 5 Open bib cock 6 Open fill valve Make up water line should be located directly after isolation valve in boiler supply piping between air scoop and expansion tank 7 Allow water to flow into drain until discharge from hose is bubble free for 30 seconds 8 When zone is completely purged of air close zone valve or balancing valve Open the zone valve for the next zone to be purged Repeat this step until all zones have been purged At completion open all zone valves or valves 9 Close bib cock continue filling the system until the pressure gauge reads 12 psig Close fill valve Note If make up water line is equipped with pressure reducing valve system will automatically fill to 12 psig D E 2 10 Open isolation valve in boiler supply piping 11 Remove hose from bib cock CONFIRM that the boiler and system have no water leaks CHECK CONTROLS WIRING AND BURNER to be sure that all connections are tight and burner is rigid Verify that all electrical connections have been completed fuses installed that the oil tank is filled and oil lines have been tested LUBRICATION Follow instruction on burner and circulator label to lubricate if oil lubricated Most motors currently used on residential type burners employ permanently lubricated bearings and thus do not r
34. itting and burner flame should start immediately 4 If the burner does not start immediately check the manual overload switch on the motor if so equipped and the safety switch on the burner primary control K ADJUST OIL PRESSURE 2 1 Locate oil pressure adjusting screw and turn screw until Pressure Gauge reads the correct pump pressure required for the specific boiler Refer to table 4 amp 4A 3 2 DO NOT REMOVE PRESSURE GAUGE until later 31 Nozzle Shutter Head stop screw Pump Pressure m Cesos 7 0 NA C7 fo Na e fe KEN L OTHER ADJUSTMENTS ADJUST THE AIR BAND AND OR AIR SHUT TER Beckett Burners a Adjust air supply by loosening lock screws and moving the air shutter and if necessary the air band Refer to Table 4 and 4A preliminary settings ADJUST DRAFT REGULATOR for a draft of 02 water gauge over the fire after chimney has reached operating temperature and while burner is running READJUST AIR BANDS on burner for a light orange colored flame while draft over the fire is 02 w c Use a smoke test and adjust air for minimum smoke not to exceed 1 with a mini mum of excess air Make final check using suitable Non Burnham Drawing Copy from other Manual Figure 23 Electrode Head Setting 2 IF NOZZLE CONTINUES TO DRIP repeat step N 1 If this does not stop the dripping remove cut off valve and seat and wipe both with a clean cloth until clean Then replac
35. nd pressure of the boiler This boiler contains components which become very hot when the boiler is operating Do not touch any components unless they are cool This appliance must be properly vented and connected to an approved vent system in good condition Do not operate boiler with the absence of an unapproved vent system This boiler needs fresh air for safe operation and must be installed so there are provisions for adequate combustion and ventilation air The interior of the venting and air intake systems must be inspected and cleaned before the start of the heating season and should be inspected periodically throughout the heating season for any obstructions Clean and unobstructed venting and air intake systems are necessary to allow noxious fumes that could cause injury or loss of life to vent safely and will contribute toward maintaining the boiler s efficiency This boiler is supplied with controls which may cause the boiler to shut down and not re start without service If damage due to frozen pipes is a possibility the heating system should not be left unatttended in cold weather or appropriate safeguards and alarms should be installed on the heating system to prevent damage if the boiler is inoperative This boiler is designed to burn No 2 fuel oil only Do not use gasoline crankcase drainings or any oil containing gasoline Never burn garbage or paper in this boiler Do not convert to any solid fuel i e wood coal or gaseous fu
36. ning per following 1 Direct communication with outdoors Minimum free area of 1 square inch per 4 000 BTU per hour input of all equipment in space 2 Vertical ducts Minimum free area of 1 square inch per 4 000 BTU per hour input of all equip ment in space Duct cross sectional area shall be same as opening free area 3 Horizontal ducts Minimum free area of 1 square inch per 2 000 BTU per hour input of all equip ment in space Duct cross sectional area shall be same as opening free area Alternate method for boiler located within confined space Use indoor air if two permanent openings communicate directly with additional space s of sufficient volume such that combined volume of all spaces meet criteria for unconfined space Size each opening for minimum free area of 1 square inch per 1 000 BTU per hour input of all equipment in spaces but not less than 100 square inches F Louvers and Grilles of Ventilation Ducts 1 All outside openings should be screened and louvered Screens used should not be smaller than 1 4 inch mesh Louvers will prevent the entrance of rain and snow 2 Free area requirements need to consider the blocking effect of louvers grilles or screens protecting the openings If the free area of the louver or grille is not known assume wood louvers have 20 25 percent free area and metal louvers and grilles have 60 75 percent free area 3 Louvers and grilles must be fixed in the open position or
37. oiler must be protected with a properly sized fused disconnect Never jump out or make inoperative any safety or operating controls The wiring diagrams contained in this manual are for reference purposes only Refer to the wiring diagram of any controls used with the boiler Read understand and follow all wiring instructions supplied with the controls this manual for the electrical diagram for this type of system Connect the system circulator wire leads to the proper locations on the Aquastat control L8124C L8148A See Figure 14 or 15 Connect the thermostat to the T T terminals on the L8124C L8148A control Set thermostat heat anticipator settings to 0 60 amps Conventional Circulator Zoned System Refer to Figure 16 of this manual for the electrical diagram for this type of system Read understand and follow all of the instructions provided with the Honeywell R8888 control Conventional Zone Valve Zoned System Refer to Figure 17 Wiring to the most popular models of zone valves are given in Figure 18 Locate C1 and C2 inside the L8124C Honeywell control Connect the two 2 terminals to the system circulator wire leads supplied with boiler Connect the Hl and H2 terminals inside the R8889 to the T T terminals in the L8124C Honeywell Control Refer to Figure 17 Connect the thermostat of each zone and the circulator for that zone to R8889 panel If an Alliance indirect water heater is use
38. re lift is required the two stage fuel unit is recommended Table 2 single stage and Table 3 two stage show allowable lift and lengths of 3 8 inch and 1 2 inch OD tubing for both suction and return lines Refer O N gt oo INDO to Figure 22 OUTSIDE TANK FUEL PUMP ABOVE BOTTOM OF TANK F FUEL PUM AIR Fi PIPE NTA TT mm zu dd FILTER i AJ A INLET l ie gt gt a i l mi ea Tp SS p Fi zee IL J l Het ly RETURN gr INE Figure 22 Two Pipe Installation 29 Vi A Q I System Start Up Verify that the venting water piping oil piping and electrical system are installed properly Refer to installation instructions contained in this manual Confirm all electrical water and oil supplies are turned off at the source and that the vent is clear from obstructions Fill entire heating system with water and vent air from system Use the following procedure on a Series Loop or multi zoned system installed as per Figure 8 or 9 1 Close isolation valve in boiler supply piping 2 Isolate all circuits by closing zone valves or balancing valves 3 Attach a hose to bib cock located just below isolation valve in boiler supply p
39. sin Maryland Wyoming Massachusetts Athens Belmont Gallia Michigan Jefferson Lawrence Meigs Minnesota Monroe and Washington Mississippi Counties Missouri All other Counties 37 O 5 fo gt gt gt REPAIR PARTS NOTE When ordering parts always give the serial number and model number shown on the boiler Also provide the name of the part s shown below Figure 26 RSA85 135 Bare Boiler Repair Parts Washer Flat 1 4 SAE TE fog son nn sso Turbulator 8113501 I I CET ka on 9 10 SASO7B3 16x1 1 4 Bolt Tankless Heater Coil Standard S350 Tankless Heater Coil Optional S375 Washer Flat USS 3 8 1 2 Thick x 2 x 13 3 4 Cerafelt Strip 1 2 Thick x 2 x 18 1 2 Cerafelt Strip 39 NOTE When ordering parts always give the serial number and model number shown on the boiler Also provide the name of the part s shown below Figure 27 RSA170 285 Boiler Repair Parts 40 Ya Thick x 1 x 23 Cerafelt Strip Ya Thick x 1 x 17 Cerafelt Strip Turbulator See A for Quantity e Tankless Heater cas fO sossos e tappee Heater Cover Plate rosa feet Bronanger Assemty Ve x 2 x 25 Cerafelt Strip Ye x 2 x 21 Cerafelt Strip Jacket Lower Front Panel Assembly Borer Model m m 41 1 2 4 5 DATE SERVICE SCHEDULE SERVICE PERFORMED 43 BECKETT BURNER PARTS LIST FOR RSA SERIES STEEL
40. te the chimney and thus prevent the condensation The addition of dilution air into the chimney may assist in drying the chimney interior surfaces A massive chimney on a cold or exposed outside wall may have produced adequate draft when it was fired with a higher input and greater volumes of heated gases With reduced input and volume the draft may be severely affected In one instance our research showed a new chimney of adequate sizing produced only 035 W C after 30 minutes of continuous firing at 13 0 CO Outside wall chimneys take longer to heat up and can have 00 W C draft at burner start up You may have to consider a special alloy chimney flue liner with insulation around it and stabilizing draft cap or even a draft inducing fan in severe cases c For the same reasons as in 2 above heat extractors mounted into the breeching are not recommended 3 For minimum clearances to combustible materials refer to Figure 2 _ OF CANOPY OUTLET COLLAR A je NOTE ALL HORIZONTAL S FIRECLAY TILE LINED CHIMNEY _ SMOKEPIPE 26 GA MIN X FULL SIZ DO NOT REDUC KEPIPE SHOULC OPE THAN ONE INCH IN FOUR FEE E I REGULATOR MIN DILUTION AIR y OIL BURNER FLOOR NE 18 MIN Figure 13 Draft Regulator Locations 19
41. y install ing hose bibs as illustrated and allowing water at WARNING Install automatic mixing valve at tankless heater outlet to avoid risk of burns or scalding due to excessively hot water at fixtures Adjust and maintain the mixing valve in accordance with the manufacturer s instructions Do not operate tankless heater without mixing valve THE FOLLOWING GUIDELINES SHOULD BE FOLLOWED WHEN PIPING THE TANKLESS HEATER 1 FLOW REGULATION If flow through the heater is greater than its rating the supply of adequate hot water may not be able to keep up with the demand For this reason a flow regulator matching the heater rating should be installed in the cold water line to the heater The flow regulator should preferably be located below the inlet to the heater and a minimum of 3 away from the inlet so that the regulator is not subjected to excess tem peratures that may occur during off periods when it is possible for heat to be conducted back through the supply line The flow regulator also limits the flow of supply water regardless of inlet pressure city pressure to run into hose bib A through the heater and out hose bib B until the discharge is clear The tees in which the hose bibs are located should be the same size as heater connections to minimize pressure drop HARD WATER A water analysis is necessary to determine the hardness of your potable water This is applicable to some city water and parti
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