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327502 - AO Smith Water Heaters

1. YINVL NOISNVdX3 Alddns YaLVM 4109 NOILOANNOO EN 17 lt N3dO OL 391 NAME 5 e Le S MalvaH LOH EE 6 LS N3dO N3dO Ba OL 481 3dld OL 381 OL 881 3dld S3unixiJ OL E OL 381 LOH HOLIMS 331 VH adiWa3 STN3NW3MHIQO3M TVNOI LIQOV HOJ aunivuadWwal SHONVNIGHO ANY 53809 W907 HLIM MO3HO 5 YSHLO ANY NOLLVHOOIJ3NOO SNIdld GALSADONS SMOHS SNIMVSG SIH L ONINHVM IMYA JYANSSIAd amva 7l 4413H Q QN3931 a e MNVL 39VHOLS T1V2ILH3A SLINN v 3N14 1LINW 48 NOISNVdX3 AlddNS YALVM 0109 Nanay LOH HOLIMS H3 1VM 3o9vodgunivd3adWail j ON LHOd 1103 C NOILLVOOT J3IVNSALTV N3dO SayYnlxla OL 431 Adid LOH IOH LNOO 1 ONUV OI 4473H 0553 3ATVA 33r138 3Hnssaud QN3931 eJnjeJeduje yue y UeY JeuBiu 4 195 eq pjnoys s jejeeu
2. 17 VENTINGINSTIALLATION 18 Vening 18 Multiple Heater Manifold 18 WATER HEATER 21 Water Line Connections 21 T amp P Valve Discharge 21 Installation Diagrams Top Inlet Outlet Usage 22 Heater Winhg EET 23 GAS PIPING DE 24 Gas Line Leak Testing ccce tenen een 24 24 START RE 25 Prion to Start Up irae cese Renate 25 Initial Start Up ws ica necesite enter iat 25 CHECKING VENTING o e Renee 26 Checking thie Input ertt rrt tree 26 Water Temperature 26 SEQUENCE OF OPERATION 2 2 2 27 Lighting amp Operating Label 27 Sequence of Operation Flow 28 MAINTENANCE 4 eas Ege ec Re 29 Venting Systems iioi nei be 29 Intake Air Screen rete innt riri 29 Temperature Pressure Relief Valve 29 Anode Rod Inspechon 29 Draining and Flushing 30 Periodic Removal of Lime Deposits from Tank Type Commercial Water Heaters iei ete dee dE 30 Deliming Solvents nuncios 30 Tank Cleanout
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4. CS Y Y Y es Y NOISNVdX3 L 1 P 07090 Oma SE Ex N3dO N3dO 1 e OL d 1 Adid OL d 1 Adid S3lVM LOH p B N3dO Ed 9 1 01 431 3dld MEE s deeg EE LI 4 M lt 1 4 OL S31lVM LOH HOLIMS 1 SYNLWYAdNAL SLNAWAYINOAY S3ONVNIQO ANY 58009 HLIM MOSHO gunivH3dW3l dWNd SNILV INDIO S301430 H3H LO ANY ONIdId GALSADONS SMOHS SIH L ONINHVM AAA J3r138 34nss3ud amva ON 3ATVA salad LHOd 1103 Q lt 5 QN3931 SLINN an13 111nW ag o 44 NOISNVdX3 NYNLIY WI VM LOH HOLIMS H3 1VM 39Vv9 1 1 amva MOH DON LHOd 1103 C AlddnS YALVM A109 Wi NOILOANNOO YALVM 0109 LIV yue y UeY JeuBiu 4 1es eq pinous 5 eu s yue oun pue y pue eq eJnjeJeduie yue 941
5. 31 Deliming Using Flo Jug 31 SERVICE 32 Ignition Control System oo ee aea 32 System 2 2 1 1 32 coiere dee 32 FOR YOUR INFORMATION eee 33 Start Up Conditions occ naiiai iiaa 33 Operational Conditions 33 5 34 WATER PIPING 58 sese 35 NOTES PODER 50 LIMITED 202 51 SAFE INSTALLATION USE AND SERVICE The proper installation use and servicing of this water heater is extremely important to your safety and the safety of others Many safety related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard Read and obey all safety messages and instructions throughout this manual It is very important that the meaning of each safety message is understood by you and others who install use or service this water heater This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death DANGER indicates an imminently hazardous situation which if not avoided A DANGER will result in injury
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11. ojo It is important to guard against gas control valve fouling from contaminants in the gas ways Such fouling may cause improper operation fire or explosion If copper supply lines are used they must be internally tinned and certified for gas service Before attaching the gas line be sure that all gas pipe is clean on the inside To trap any dirt or foreign material in the gas supply line a sediment trap must be incorporated in the piping See Figure 21 The sediment trap must be readily accessible and not subject to freezing conditions Install in accordance with recommendations of serving gas suppliers Refer to the current edition of the National Fuel Gas Code To prevent damage care must be taken not to apply too much torque when attaching gas supply pipe to gas control valve inlet Apply joint compounds pipe dope sparingly and only to the male threads of pipe joints Do not apply compounds to the first two threads Use compounds resistant to the action of liquefied petroleum gases 24 Gas Meter Size Natural Gases Only Be sure the gas meter has sufficient capacity to supply the full rated gas input of the water heater as well as the requirements of all other gas fired equipment supplied by the meter If gas meter is too small ask the gas company to install a larger meter having adequate capacity GAS PIPING AND SEDIMENT TRAP INSTALLATION REGULATED GAS SUPPLY LINE MAIN GAS SHUTOFF VALVE REDU
12. 4 Close the hot water faucet opened in Step 2 as water starts to flow Supply Gas Line Purging AWARNING Fire or Explosion Hazard Gas line purging is required with new piping or systems in which air has entered To avoid risk of fire or explosion purge discharge must not enter into confined areas or spaces where ignition can occur The area must be well ventilated and all sources of ignition must be deactivated or removed Use only the gas shown on the water heater rating label Keep ignition sources away from faucets after extended periods of non use H Read instruction manual before installing using or servicing water heater 1 Close the Main Gas Shutoff Valve see Figure 21 on page 24 2 Purge all air from the supply gas line up to the water heater s Main Gas Shutoff Valve 3 When all air has been purged from the supply gas line tighten all supply gas line connections 4 Check for gas leaks see Gas Line Leak Testing on page 24 and repair any leaks found 25 INITIAL START UP Required Test Equipment U tube manometer pressure gauge or digital manometer Recommended range 20 W C 5 kPa NOTE All test equipment must be acclimated to ambient temperature before calibration and use Preparation 1 Adjust the thermostat to the lowest temperature setting 2 Turn the water heater s on off switch to the off position 3 Close the Main Gas Shut Off Valve see Figure 21 on page 24 4 Wait f
13. 5 5 y jueuoduJoo Aug Jo Bunei ainssoid jou jjeus Bumes l pue 941 Buidid 9 v eBesn 1194 sepoo 10 uMOUS 76 de E LF GSHSINIS D 1 Tt 1 I3 TTT Lo LA Q 5 N3dO N3dO N3dO Ol 3dld OL d 1 3dld OL 491 Adid lt EEIKEIN d EEIKEIN La 5 f EN dd f f g 6 O OL d 1 3dld OL H31VM LOH IOH LNOO Sen MNV L ONUV OI 22114 0553 33r138 39 5534 9 QN3931 Se go Y STN3OIN3IDQCOS SAONVNIGHO ANY 58009 HLIM MO3HO S301440 H3HLO ANY NOLLVHOO9IJNOO GALSADONS SMOHS SIH L ONINHVM MNVL 5 1V2ILH3A 2 3N14 1LINW 45 eJnye1eduie yue y uey 195 eq Pinoys s Jejeeu eu S quei y pue y y pue eq eunjeJeduie yue 941 wajsAs y ui jueuoduuoo Aug
14. L2 NEUTRAL CIRCULATING PUMP WIRING DIAGRAM DISHWASHER LOOP WITH TOGGLE SWITCH DISHWASHER TOGGLE SWITCH FIELD SUPPLIED TEMPERATURE CONTROL INSTALLED IN THE CIRCULATING LOOP RETURN LINE NOTE USE SEPARATE 120 VAC POWER SUPPLY FOR PUMP CIRCUIT DO NOT SHARE POWER WITH WATER HEATER 5 THIS MAY CAUSE ELECTRICAL LINE NOISE AND LEAD TO ERRATIC CONTROL SYSTEM OPERATION 120 VAC POWER L1 HOT L2 NEUTRAL FIGURE 9 11 HIGH ALTITUDE INSTALLATIONS A WARNING e Under no circumstances should the input exceed the rate shown on the water heater s rating label e Overfiring could result in fire or explosion e Gas and carbon monoxide detectors are available AWARNING Breathing Hazard Carbon Monoxide Gas e Under no circumstances should the input exceed the rate shown on the water heater s rating label e Special consideration must be taken with installations above 10 100 3078m for standard models e Overfiring could result in damage to the water heater and sooting e Gas and carbon monoxide detectors are available Breathing carbon monoxide can cause brain damage or death Always read and understand instruction manual The water heaters covered by this manual are certified for use without modification for an altitude of 10 100 feet 3 078 m Consult the factory for installation at altitudes over 10 100 feet 3 078 m Some gas utility companies derate their gas for altitude maki
15. TOP VIEW FRONT VIEW BACK VIEW FIGURE 6 TABLE 1 ROUGH IN DIMENSIONS 182 25 93 98 18542 GEET PoE 2094 5271 2012 5207 2012 5207 21 533 27 54 2 594 J K 1wu2NPT 142NPT _______ __ L QD ___ 203 8 203 Approx Shipping Weight STD Approx Shipping Weight ASME TABLE 2 RECOVERY CAPACITIES BASED 80 THERMAL EFFICIENCY U S Gallons hr and Liters hr at Temperature Rise Indicated Liters Eff 36 40 50 54 60 70 72 80 90 100 108 110 120 126 130 140 c 20 22 28 30 33 39 40 44 50 56 60 61 67 70 72 78 120 81 80 320 288 230 213 192 165 160 144 128 115 107 105 96 91 89 82 HOt r1 Teen He Hor Lave soe 027 ees ace eas ase ase oc 387 36r 328 398 aio fa eph 4 Faro 2e Tara Fate tot Hoe Hes Her Hae Hot Hoa Hizo Hir tiia Hoe J 45 __ 307 1555 1399 1120 1037 933 800 777 700 622 560 518 509 466 444 431 400 80 GPH 480 432 346 320 288 247 240 216 192 173 160 157 144 137 133 123 53 307 1818 1636 1309 1212 1091 935 909 818 727 654 606 595 545 519 503 467 mum schlecht erem 58 307 2009 1808 144
16. Aes we A This appliance is equipped with an ignition device which automatically lights the pilot Do not try to light the pilot by hand B BEFORE OPERATING smell all around the appliance area for gas Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor WHAT TO DO IF YOU SMELL GAS e Do not try to light any appliance e Do not touch any electric switch do not use any telephone in your building e Immediately call your gas supplier from a neighbor s telephone Follow the gas suppliers instructions If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life If you cannot reach your gas supplier call the fire department C Use only your hand to switch the gas valve on or off Never use tools If the on off switch will not move don t try to repair H Call a qualified service technician Force or attempted repair may result in a fire or explosion D Do not use this appliance if any part has been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water OPERATING INSTRUCTIONS 4 D STOP Read the safety information above on this label Set thermostat to lowest setting 3 Turn off all electric power to the appliance This appliance is equipped with an ignitio
17. EE Model 400 Input 390 000 btu hr Total Vent Height Feet Vent connector size 6 inches 6 8 10 15 20 30 50 100 Input Btuhr Rise Vent Connector Diameter Inches 390 000 ___14 __ v 7 6 390 000 D 256 __ a a v 7 6 300008 ee a 6 NumberofHeaters Combined Input Btu hr 2 1 7000 2 12 12 40 10 9 9 8 00 16 14 4 14 12 12 10 9 WATER HEATER INSTALLATION WATER LINE CONNECTIONS The water piping installation must conform to these instructions and to all local code authority having jurisdiction Good practice requires that all heavy piping be supported Read and observe all requirements in the following sections before installation of the water piping begins 1 Water Temperature Control and Mixing Valves on page 12 Dishwashing Machines on page 13 Temperature Pressure Relief Valve on page 13 Closed Systems and Thermal Expansion on page 13 For multiple water heater installations see Water Piping Diagrams beginning on page 35 Water potable Heating And Space Heating 1 All piping components connected to this unit for space heating applications shall be suitable for use with potable water Toxic chemicals such as those used for boiler treatment shall NEVER be introduced into this system This unit may NEVER be connected to any existing heating system or component
18. NOTE Artificially softened water requires the anode rod to be inspected annually DRAINING AND FLUSHING ADANGER e Burn harzard e Hot water discharge e Keep hands clear of drain valve discharge It is recommended that the water heater storage tank be drained and flushed every 6 months to reduce sediment buildup The water heater should be drained if being shut down during freezing temperatures To Drain the Water Heater Storage Tank 1 Turn off the electrical supply to the water heater 2 Turn off the gas supply at the Main Gas Shutoff Valve if the water heater is going to be shut down for an extended period 3 Ensure the cold water inlet valve is open Open a nearby hot water faucet and let the water run until the water is no longer hot 5 Close the cold water inlet valve to the water heater 6 Connecta hose to the water heater drain valve and terminate it to an adequate drain 7 Open the water heater drain valve and allow all the water to drain from the storage tank 8 Close the water heater drain valve when all water in the storage tank has drained 9 Close the hot water faucet opened in Step 4 10 If the water heater is going to be shut down for an extended period the drain valve should be left open To Flush the Water Heater Storage Tank 1 Turn off the electrical supply to the water heater 2 3 Ensure the cold water inlet valve is open Open a nearby hot water faucet and let the wat
19. Order Part Number 9005416105 1 gallon packed 4 gallons per case or Part Number 90054171065 5 gallon container NOTE is not available for use in Canada Hydrochloric base acids are not recommended for use glass lined tanks Observe handling instructions on label of product being used TANK CLEANOUT PROCEDURE The following practices will ensure longer life and enable the unit to operate at its designed efficiency 1 Once a month the heater should be flushed Open the drain valve and allow two gallons of water to drain from the heater Inlet water valve should remain open to maintain pressure in tank 2 A cleanout opening is provided for periodic cleaning of the tank Gas must be shut off and heater drained before opening cleanout To clean heater through cleanout opening proceed as follows 3 Drain heater 4 Remove outer cover plate from lower side of heater jacket 5 Remove six 6 hex head screws securing tank cleanout plate and remove plate 6 Remove lime scale or sediment using care not to damage the glass lining 7 Inspect cleanout plate gasket if new gasket is required replace with part no 9004099215 8 Install cleanout plate Be sure to draw plate up tight by tightening screws securely 9 Replace outer jacket cover plate In some water areas the sediment might not be removed by this method and may result in the water heater making rumbling or boiling noises To dissolve and r
20. eui pue eq oJju02 eunjeJeduie yue 941 5 5 y jueuoduJoo Aug Jo Bugel 1 jou jjeus Dumas pue 941 6 5 sepoo e20 10 UMOUS E Buidid peujsjeJg d 2 HOCH oor GSHSINIS NOISNVdX3 NOLLO3NNOO p H3IVM 4102 Mddns ALWNYAL TV YALWM 109 vL d 2 5 OL 491 3dld Ol 381 Jdid TE lt o c H31VM LOH ily inl E OL L H31VM LOH Q X HOLIMS H3 1VM 39Vv9 3qunivi3diaL AAWA Set TIV8 TI IOH LNOO 1 1 1 ONUV OI 4473H 0553 3ATVA 4413H lt 5 9 QN3931 SLNAWAYINOAY S3ONVNIQO ANY 58009 HLIM MO3HO S301440 H3HLO ANY NOLLVHOOIJNOO qa3ls399f SMOHS SIH L ONINHVM 39VHOLS 1VOLLH3A HLIM SLINN 2 ana UE e eo 39 yue y uey 1euBiu 4
21. 991 76 s 4ue1 eBe101s y pue 99 eui pue eq pinous eJnjeJeduie xue 941 7 eus sepoo e20 10 UMOUS BDIAIOS E y ui jueuoduJoo Aug Hugel ejnsseud jou jJeus Dumas jer aJ euynsseJd pue 941 72 Buidid T8001 G3HSINIJ N3dO OL d8L Adid La N3dO OL 491 Adid N3dO 5 Ol 3481 3dld N3dO d OL 3481 E H SLNAWAYINOAY S3ONVNIQO ANY 58009 1 HLIM MOSHO S301440 H3HLO ANY NOLLVHOOIJNOO SNIdld QALSADONS SMOHS SIHL ONINSVM MNVL 39VHOLS TVLNOZINOH SLINN 3N14 1LLINW 8 3 c 49 NOTES 50 COMMERCIAL WATER HEATER LIMITED WARRANTY fe Smith EFFECTIVE For 3 Years in the event of a tank leak we will repair or at our discretion replace the defective water heater For 1 Year in the event of part failure we will repair or at our discretion replace the defective part We warrant this product against defects in materials or workmanship as described in this document if installed within the United States or Canada and provided the product
22. Diameter Inches Combined Input in Thousands of Btu hr Manifold and Common Vent Diameter Inches 308 000 7 e 6 6 je 6 6 WEE EES 462 000 6 4 616 000 po 9 7 7 6 Model BTL 180 198 8199 Ventconnectorsize 6inches 6 8 10 15 20 30 50 100 input Btn Rie 7 VentConnectorDiameter Inches 2 _________ 8000 tft 7 7 6 6 e 6 o 6 19900 110 7 7 7 e e 6 6 6 8000 24 e e e e 6 6 6 6 S 349900 2t 7 7 e e 6 eo 6 e S 8000 3t 6 6 e e e 6 o 6 1900 t 6 6 6 6 6 6 o 6 Combined Input in ee pO Number of 154 Heaters Thousands of Btu hr Manifold and Common Vent Diameter Inches 360000 se 39500 LS 8 7 7 7 6 6 4 59700 jo 8 8 7 7 ____720 000 12 12 140 10 9 8 8 79600 72 12 10 190 9 8 8 50 100 BU EE 25000 c DEE Combined Input in Number of 250 Heaters om Thousands of Btu hr 500 000 750 000 a GR gt _______4 ________ 1 000 000 14 12 12 10 10 9 9 TABLE 6 TECHNICAL DATA VENTING Continued Model 275 Input 275 000 btu hr Total Vent
23. W C 3 48 we nang 120 60 310 THRU 400 A 4 5 WC 1 12 KPA 14 W C 3 48 kPa 120 60 ____ lt 5 LOCATING THE WATER HEATER CAUTION All water heaters eventually leak Do not install without adequate drainage When installing the heater consideration must be given to proper location Location selected should be as close to the stack or chimney as practicable with adequate air supply and as centralized with the piping system as possible AWARNING Fire or Explosion Hazard Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance Avoid all ignition sources if you smell gas Do not expose water heater controls to excessive gas pressure Use only the gas shown on the water heater rating label Maintain required clearances to combustibles Keep ignition sources away from faucets after extended periods of non use A Read instruction manual before installing using or servicing water heater There is a risk in using fuel burning appliances such as gas water heaters in rooms garages or other areas where gasoline other flammable liquids or engine driven equipment or vehicles are stored operated or repaired Flammable vapors are heavy and travel along the floor and may be ignited by the heater s igniter or main burner flames causing fire or explosion Some local codes permit operation of gas appliances in such areas if they are ins
24. could result in death or serious injury This manual must remain with the water heater Water temperature over 125 F 52 C can cause severe burns instantly resulting in severe injury or death ADANGER Children the elderly and the physically or mentally disabled are at highest risk for scald injury Feel water before bathing or showering Temperature limiting devices such as mixing valves must be installed when required by codes and to ensure safe temperatures at fixtures AWARNING Overheated water can cause water tank explosion Properly sized temperature and pressure relief valve must be installed in the opening provided CAUTION Improper installation use and service may result in property damage Do not operate water heater if exposed to flooding or water damage Inspect anode rods regularly replace if damaged Install in location with drainage Fill tank with water before operation Properly sized thermal expansion tanks are required on all closed water systems Refer to this manual for installation and service Verify the power to the water heater is turned off before performing any service procedures GENERAL SAFETY INFORMATION PRECAUTIONS DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN EXPOSED TO FLOODING OR WATER DAMAGE Immediately call a qualified service technician to inspect the water heater and to make a determination on what steps should be taken next If
25. flowing static pressure SUPPLY GAS REGULATOR The maximum allowable gas supply pressure for this water heater is 14 inches W C 3 48 kPa Install a positive lock up gas pressure regulator in the gas supply line if inlet gas pressure can exceed 14 inches W C 3 48 kPa at any time Regulators must be sized used according to manufacturer s specifications If a positive lock up regulator is required follow these instructions 1 Positive lock up gas pressure regulators must be rated at or above the input Btu hr rating of the water heater they supply Supply gas regulators shall have inlet and outlet connections not less than the minimum supply gas line size for the water heater they supply See Table 7 on page 24 Positive lock up gas pressure regulator s should be installed no closer than 3 feet 1 meter and no farther than 8 feet 2 4 meters of equivalent length from the water heater s inlet gas connection After installing the positive lock up gas pressure regulator s an initial nominal supply pressure setting of 7 0 W C 1 74 kPa while the water heater is operating is recommended and will generally provide good water heater operation 2 12 Some addition adjustment maybe required later to maintain a steady gas supply pressure When installing multiple water heaters in the same gas supply system it is recommended that individual positive lock up gas pressure regulators be installed at each unit POWER SUPPLY The
26. remains at its original place of installation Warranty coverage begins the date of installation OR the date of manufacture if installation cannot be verified WHAT S COVERED Subject to these terms in the event of defect in materials and or workmanship resulting in a tank leak during the first three years we will Replace the water heater should the tank leak Subject to these terms in the event of a defect in materials and or workmanship appearing during the first year we will Repair or at our discretion replace any part of the water heater covered under this limited warranty excluding parts subject to normal maintenance Example non electronic anode rod filter etc Service labor shipping delivery installation handling or any other costs are not covered at any time under this warranty Any replacement part or product will be warranted only for the unexpired portion of the original water heater s limited warranty period If an identical model is no longer available due to a change in law regulation or standard we will replace the product with one having comparable capacity and input In these instances the owner will have the option of paying the difference between what was paid for the original model and the new model with the additional features or receiving a refund of the portion of the purchase price on a pro rata basis allocable to the unexpired portion of the warranty SERVICE INQUIRIES W
27. the unit is exposed to the following do not operate heater until all corrective steps have been made by a qualified service technician 1 External fire 2 Damage 3 Firing without water GROUNDING INSTRUCTIONS This water heater must be grounded in accordance with the National Electrical Code and or local codes These must be followed in all cases This water heater must be connected to a grounded permanent wiring system or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater see Figure 20 HYDROGEN GAS FLAMMABLE AWARNING Explosion Hazard Flammable hydrogen gases may be present Keep all ignition sources away from faucet when turning on hot water Hydrogen gas can be produced in a hot water system served by this water heater that has not been used for a long period of time generally two weeks or more Hydrogen gas is extremely flammable To reduce the risk of injury under these conditions it is recommended that a hot water faucet served by this water heater be opened for several minutes before using any electrical appliance connected to the hot water system If hydrogen is present there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow THERE SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN INTRODUCTION Thank You for purchasin
28. with minimum clearance from combustion construction as indicated in Figure 7 and Table 4 In all installations the minimum combustible clearances from vent piping shall be 6 15 2 cm Vent piping passing through a combustible wall or ceiling must be a continuous run no joints and retain 6 15 2 cm clearance unless an approved reducing thimble is used When the water heater is installed directly on carpeting the water heater shall be installed on a metal or wood panel extending beyond the full width and depth of the water heater by at least 3 in 76 2 mm in any direction or if the water heater is installed in an alcove or closet the entire floor shall be covered by the panel The panel must be strong enough to carry the weight of the heater when full of water A service clearance of at least 24 61 cm should be maintained from serviceable parts TABLE 4 MINIMUM CLEARANCES TO COMBUSTIBLE OR NON COMBUSTIBLE CONSTRUCTION Model Right Side B Left Side C Back D Ceiling 0 CEILING LEFT SIDE 6 CLEARANCE ON REDUCING THIMBLE SEE RIGHT WALL FRONT VIEW REAR WALL LEFT WALL RIGHT SIDE Z Z ZS Ze TOP VIEW FIGURE 7 NSF LEG KIT 1 2 13 BOLT 4 FLAT WASHER 8 S NSF END PLATE 2 LEFT 2 RIGHT HEATER SUPPORT LEG BEVEL WASHER 4 1 2 13 NUT 4 4 TALL LEG EXTENSION 2 FIGURE 8 The NSF Leg K
29. 7 1340 1206 1033 1005 904 804 723 670 658 603 574 556 517 BTL 199 80 GPH S531 478 382 354 319 273 265 239 212 191 177 174 159 152 147 137 58 378 2009 1808 1447 1340 1206 1033 1005 904 804 723 670 658 603 574 556 517 ee EES E 73 378 2524 2272 1818 1683 1515 1298 1262 1136 1010 909 841 826 757 721 699 649 E E Ee er ee Harper ee ese err ES 378 LPH 2777 2499 1999 1851 1666 1428 1388 1250 1111 1000 926 909 833 793 769 714 86 80 827 744 595 551 496 425 413 372 331 298 276 271 248 236 229 213 J 9 325 X LPH 3130 2817 2254 2087 1878 1610 1565 1409 1252 1127 1043 1024 939 894 867 805 ENEE EE fera ros Test F sae teoa tree tra tsr ___ 107 325 LPH 3696 3326 2661 2464 2217 1901 1848 1663 1478 1330 1232 1209 1109 1056 1023 950 Ett ___ 114 325 3938 3544 2835 2625 2363 2025 1969 1772 1575 1418 1313 1289 1181 1125 1091 1013 TABLE 3 GAS AND ELECTRICAL CHARACTERISTICS Gas Supply P wen Se Be EE 120 THRU 275 A 3 5 W C 0 87 aT 14
30. ASES SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION This heater is not approved for direct vent installation Heater must be protected from freezing downdrafts Remove all soot or other obstructions from the chimney that will retard a free draft Type B venting is required with these heaters For typical venting application see TECHNICAL DATAVENTING on pages 19 and 20 This water heater must be vented in compliance with all local codes the current revision of the National Fuel Gas Code ANSI Z223 1 and with the Category Venting Tables If any part of the vent system is exposed to ambient temperatures below 40 F 4 4 C it must be insulated to prevent condensation Do not connect the heater to a common vent or chimney with solid fuel burning equipment This practice is prohibited by many local building codes as is the practice of venting gas fired equipment to the duct work of ventilation systems CORRECT METHOD OF VENT PIPE INSTALLATION INCORRECT INSTALLATION WITH NO UPWARD T ANGLE PROVIDE MAXIMUM VERTICAL RISE OF VENT PIPE DIRECTLY ABOVE HEATER BEFORE TURNING INTO HOIZONTAL RUN FIGURE 12 FIGURE 11 18 Where a separate vent connection is not available and the vent pipe from the heater must be connected to a common vent with an oil burning furnace the vent pipe should enter the smaller common vent or chimney at a point above the large vent pipe MULTIPLE HEATER MANIFOLD Fi
31. CE PAID WHETHER BASED ON CONTRACT TORT STRICT LIABILITY OR ANY OTHER LEGAL THEORY For service inquiries call the telephone number listed below Be prepared to provide the following information name address and telephone number the model and serial number of the water heater proof of installation and a clear description of the problem For your records fill in the product Serial Model U S Customers A O Smith Corporation 500 Tennessee Waltz Parkway Ashland City Tennessee 37015 800 527 1953 www hotwater com Canadian Customers Box 310 768 Erie Street Stratford Ontario N5A 6T3 800 265 8520 51 fe Smith 500 Tennessee Waltz Parkway Ashland City TN 37015 Tech Support 800 527 1953 Parts 800 433 2545 www hotwater com Copyright O 2014 A O Smith Corporation All rights reserved
32. CER COUPLING AWARNING Use joint compound or Teflon tape compatible with propane gas Leak test before placing the water heater in operation Disconnect gas piping and main gas shutoff valve before leak testing Install sediment trap in accordance with NFPA 54 Any time work is done on the gas supply system perform a leak test to avoid the possibility of fire or explosion 1 For test pressures exceeding 1 2 psi 3 45 kPa disconnect the water heater and its Main Gas Shutoff Valve from the gas supply piping system during testing see Figure 21 The gas supply line must be capped when disconnected from the water heater For test pressures of 1 2 psi 3 45 kpa or less the water heater need not be disconnected but must be isolated from the supply gas line by closing the Main Gas Shutoff Valve during testing Coat all supply gas line joints and connections upstream of the water heater with a non corrosive soap and water solution to test for leaks Bubbles indicate a gas leak Do not use matches candles flame or other sources of ignition for this purpose 4 Repair any leaks before placing the water heater in operation PURGING Gas line purging is required with new piping or systems in which air has entered Purging should be performed per the current edition of NFPA 54 the National Fuel Gas Code 5 PRIOR TO START UP Installation and start up of this water heater requires abilities and skills equiva
33. HAT S NOT COVERED Problems caused by improper gas supply line sizing gas type venting connections combustion air voltage wiring or fusing Failure to follow applicable codes Failure to follow printed instructions Abuse misuse accident fire flood Acts of God Improper installation sizing delivery or maintenance Claims related to rust noise smell or taste of water Failure to conduct authorized factory start up if required Alterations to the water heater Non outdoor heaters installed outdoors Damages due to failure to allow for thermal expansion Heat exchanger failure due to lack of adequate proper supply of water Heaters moved from their original location Service trips to explain proper installation use or maintenance of the product unit or to describe compliance requirements under applicable codes and regulations Charges related to accessing your heater including but not limited to door wall removal equipment rental etc Replacement parts after expiration of this warranty LIMITATIONS NOTWITHSTANDING ANYTHING ELSE TO THE CONTRARY THIS IS YOUR SOLE AND EXCLUSIVE WARRANTY ALL OTHER WARRANTIES INCLUDING A WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE ARE EXPRESSLY DISCLAIMED SELLER SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL INCIDENTAL SPECIAL PUNITIVE OR OTHER INDIRECT DAMAGES TOTAL LIABILITY ARISING AT ANY TIME SHALL NOT EXCEED THE PURCHASE PRI
34. Height Feet Vent connector size 6 inches 6 8 10 15 20 30 50 100 Input Rise VentConnectorD ameter Inches 27500 18 8 8 8 7 7 6 e 6 2500 28 8 8 7 7 7 o e 6 L 275 000 sm r p 7 7 7 6 6 e 2 50 0 o 8 8 7 7 5 550 74 12 12 wo o 8 4 1 5900 4 14 14 12 12 12 10 9 Model 310 Input 310 000 btu hr Total Vent Height Feet Vent connector size 6 inches 6 8 10 15 20 30 50 100 InputBtuhr 7 Connector Diameter Inches 310000 18 a j 8 8 v v e 6 7000 24 8 8 7 7 7 e 6 3 000 e asa 7 7 7 6 6 Number Heaters Combined Input Btu h 0 1 2 6000 0 o 9 8 8 7 5 3 4 4 12 12 10 59 9 4 700 16 14 14 14 12 12 10 9 e i cs Model 366 Ventconnectorsize 6inches 6 8 140 15 2 so 50 100 InputBtuhr Rise 7 VentConnectorDiameter Inches 366 000 w pe px p m e 36600 28 es v 7 6 36600 3t 8 7 7 6 6 Number of Heaters Combined Input Btu h 0 21 po 782 009 e 2 re 9s 9 s e j _____53 19 00 4 4 14 12 12 12 10 9
35. ILVINOYIO OL H31VM LOH HOLIMS Y3LYM JOYLNO9 FYNIWYAdWSL SLN3IN3HIQO3MH IWNOILIGGV HOJ 3ovogxunivu3dWal ONILVINOUIO SHONVNIGHO 53805 1V901 HLIM MO3HO S301430 YSHLO NOLLVHOOIJ3NOO qalsa99fns s SMOHS SIH L ONINHVM 3ATVA 33r 138 AYNSSadd amva ON 3ATVA SASSY Q QN3931 m e 39VHOLS TVLNOZINOH HLIM LINN ana 36 jeus sepoo e20 10 UMOYS 99IAOS y ui eunsseJd jou 5 5 pue 991 e Buidid LU SALON MNVL NOISNVdX3 c 8 wll OL 0 HalvM LOH N3dO OL 891 Q Alddns 8331V3H Nanay QS 191100 eg A c H 191110 Ha3lvM HOLIMS S3 IV M 3i VH3dl YNVL TVNOI LIQOV 3ovo 3univsuadWal 9NLLVTQYOSIO S3ONVNIQHO ANY 53809 1VO9O 1 MO3HO S301430 YSHLO ANY NOILVHOOIJNOO SNIdld
36. Instruction Manual MODELS BTL 120 154 180 198 199 250 A 275 A 310 A 366 A 400 A 500 Tennessee Waltz Parkway Ultra Low NOx SERIES 200 Ashland City TN 37015 INSTALLATION OPERATION SERVICE MAINTENANCE LIMITED WARRANTY Complies with SCAQMD Low NOx Rule 1146 2 CERTIFIED www ahridirectory org GAS FIRED SSIF B LISTED Low Lead Content WATER QUALITY HLW WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your building e Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions e f you cannot reach your gas supplier call the fire department AAMWARNING Read and understand this instruction manual and the safety messages herein before installing operating or servicing this water heater Installation and service must be performed by a_ qualified installer service agency or the gas supplier Failure to follow these instructions and safety messages could result in death or serious injury Thank you for buying this energy efficient water heater This m
37. LE ESALLON SNS FLOW JUG NY VENT ACTIVITY DRAIN POSITION pa pELIMING COVER POSITION FLOW JUG CARTON GRADUATIONS FIGURE 27 SERVICE The installer may be able to observe and correct certain problems which may arise when the unit is put into operation HOWEVER it is recommended that only a qualified service agency using appropriate test equipment be allowed to service the heater As preliminary step check wiring against diagram check for grounded broken or loose wires Check all wire ends to be sure that they are making good contact IGNITION CONTROL SYSTEM Before calling your qualified service agency the following checklist should be examined to eliminate obvious problems from those requiring replacement or servicing Check that main gas shutoff valve is fully open and that gas service has not been interrupted Check electrical supply to the water heater for possible blown or tripped fusing or power interruption Also check the 3 amp fuse on the front of the digital thermostat Fig 2 Is the water temperature in tank below the thermostat dial setting on the water heater thermostat calling for heat It is possible that the high limit E C O has functioned to shut off the water heater See page 7 High Limit Switch for reset procedure Contact your service agent if limit continues to function to shut off water heater 32 SYSTEM DIAGNOSTICS Your water heat
38. N LED FUSE loo 0 Of ei DIGITAL THERMOSTAT FIGURE 3 ELECTRONIC IGNITION CONTROL Each heater is equipped with an ignition control The solid state ignition control Figure 4 ignites the burner by utilizing an intermittent spark to pilot igniter Spark and pilot gas ON until lightoff or trial for ignition ends If pilot fails to light pilot gas and spark OFF 100 shutoff After 5 minutes delay a new trial for ignition is initiated This sequence continues until lightoff or Call for Heat is removed IGNITION CONTROL FIGURE 4 BLOWER BURNER ASSEMBLY The fan assisted combustion system includes spark to pilot igniter 100 premix stainless steel burners and prejets for input rate and precision air gas ratio control BURNER PILOT ASSEMBLY BLOWER PROVER SWITCH GAS L i Fo 4 2 BURNER BLOWER ASSEMBLY for Input of 199KBtu H or Less BLOWER ASSEMBLY AIR INTAKE aves SCREEN PROVER SWITCH GAS VALVE LOW GAS PRESSURE SWITCH FOR SELECT MODELS 3 BURNER BLOWER ASSEMBLY for Input of 250KBtu H or Higher FIGURE 5 The intake air screen is attached to the inlet of the combustion blower Inspect the intake air screen every six months The intake air screen should be cleaned of any buildup of debris or foreign material INSTALLATION CONSIDERATIONS ROUGH IN DIMENSIONS 8 VENT CONNECTION TOP OUTLET 11 2 NPT TOP INLET 11 2 NPT
39. NFPA documents are also available from the National Fire Protection Association 1 Batterymarch Park Quincy MA 02269 3 If after reading this manual you have any questions or do not understand any portion of the instructions call the local gas utility or the manufacturer whose name appears on the rating plate 4 Carefully plan the place where you are going to put the water heater Correct combustion vent action and vent pipe installation are very important in preventing death from possible carbon monoxide poisoning and fires Examine the location to ensure the water heater complies with the Locating the Water Heater section in this manual 5 For California installation this water heater must be braced anchored or strapped to avoid falling or moving during an earthquake See instructions for correct installation procedures Instructions may be obtained from California Office of the State Architect 400 P Street Sacramento CA 95814 FEATURES AND COMPONENTS CONTROLS CONTROL PANEL DIGITAL THERMOSTIAT IGNITION CONTROL ON OFF SWITCH FIGURE 1 THE ELIMINATOR SELF CLEANING SYSTEM These units include The Eliminator Self Cleaning System installed in the front water inlet see Figure 2 The Eliminator inlet tube can only be used in the front water inlet connection Do not install the Eliminator inlet tube in either the top or back inlet water connection The Eliminator must be oriented correctly for prop
40. SLINN Z 2013 LLIN QN3931 41 eDesn 5 sepoo e20 Buld AJas 10 UMOUS E 5 5 y ui jueuoduJoo Aug 5 1 jou eys Dumas Jer aJ pue 941 72 Buidid peugjeJd LU SALON SE ES 1 NYNLAY YALVM 15008 MNV I NOISNVdX3 N e a A eege YALVM 15 4315008 4315008 OL H31VM QalvaH 3ud H31VM LOH EZ N wy I L_ 9 gt gt gt E E E SSYNLXI4 OL S3unixi4 OL LOH 1 315009 HO UMS ANI OMINOO NYL 3ovodunivu3dWal dWndoNuvinoun S3ONVNIQSO ANY 53809 1V2O 1H LIM MOSHO S301440 H3HLO ANY NOLLVHOOIJNOO SNIdld GQALSADONS SMOHS SIHL ONINSVM ann INI 3ATVA 43734 3ATVA Jara 3ATVA 11 8 1HOd TINA C dunss3ud SUNLWYAdWAL 2 aunivs3dWal OML SLINN 2 3073 LLIN QN3931 42 sepoo un 929IAJOS E ulgjs s ay ui jueuoduuoo Aue zou eys
41. adian Electrical Code CSA C22 1 If any of the original wire as supplied with the water heater must be replaced it must be replaced with 105 C rated wiring or its equivalent except in the burner housing In this case 200 C rated wire must be used The controls of this water heater are polarity sensitive Be certain to properly wire the hot and neutral connections wee how WIRING DIAGRAM PROBE PROBE BLOWER THERMOSTAT 120 VAC HOT 120 VAC NUETRAL EARTH GROUND LOW GAS PRESSURE BLOWER POWER RELAY SWITCH PRESSURE SELECT MODELS SWITCH IGNITION MODULE LEGEND R RED W WHITE BLK BLACK Y YELLOW FACTORY INSTALLED GAS VALVE eee BY INSTALLER IF ANY OF THE ORIGINAL WIRE AS SUPPLIED MUST BE REPLACED US ONLY 18 AWG 105 C 600V UL AWM STYLE 1015 WIRE EXCEPT GAS VALVE CABLE WHICH MUST USE 2 CONDUCTOR 18 AWG 80 C 300V UL CATEGORY QPTZ POWER LIMITED CIRCUIT CABLE 327382 000 REV 00 FIGURE 20 23 GAS Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area Size the main gas line in accordance with Table 7 The figures shown are for straight lengths of pipe at 0 5 in W C pressure drop which is considered normal for low pressure systems Note Fittings such as elbows tees and line regulators will add to the pipe pressure drop Also refer
42. ails to completely reset and continues to release water immediately close the cold water inlet to the water heater and drain the water heater see Draining and Flushing on page 30 Replace the Temperature Pressure Relief Valve with a properly rated sized new one see Temperature Pressure Relief Valve on pages 13 14 for instructions on replacement TEMPERATURE PRESSURE RELIEF VALVE DISCHARGE PIPE FIGURE 25 If the Temperature Pressure Relief Valve on the water heater weeps or discharges periodically this may be due to thermal expansion NOTE Excessive water pressure is the most common cause of Temperature Pressure Relief Valve leakage Excessive water System pressure is most often caused by thermal expansion in a closed system See Closed Water Systems and Thermal Expansion on page 13 The Temperature Pressure Relief Valve is not intended for the constant relief of thermal expansion Temperature Pressure Relief Valve leakage due to pressure build 29 up in a closed system that does not have a thermal expansion tank installed is not covered under the limited warranty Thermal expansion tanks must be installed on all closed water systems DO NOT PLUG THE TEMPERATURE PRESSURE RELIEF VALVE OPENING THIS CAN CAUSE PROPERTY DAMAGE SERIOUS INJURY OR DEATH AWARNING Temperature Pressure Relief Valve must comply with ANSI 221 22 CSA 4 4 and ASME code Properly sized temperature pressure relief valve must be
43. al or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of the following 1 1 square inch per 3000 Btu hr 733 mm of the total input rating of all appliances located in the enclosure and 2 Not less than the sum of the areas of all vent connectors in the space OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS FIGURE 16 The confined space shall be provided with two permanent horizontal ducts one commencing within 12 inches 300 mm of the top and one commencing within 12 inches 300 mm of the bottom of the enclosure The horizontal ducts shall communicate directly with the outdoors See Figure 16 Each duct opening shall have a minimum free area of 1 square inch per 2 000 Btu hr 1100 mm2 per kW of the aggregate input rating of all appliances installed in the enclosure When ducts are used they shall be of the same cross sectional area as the free area of the openings to which they connect The minimum dimension of rectangular air ducts shall be not less than 3 inches 7 6 cm OUTDOOR AIR THROUGH TWO VERTICAL DUCTS The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only DO NOT refer to these illustrations for the purpose of vent installation See Venting Installation on page 18 for complete venting installation instructions FIGURE 17 The confined space shal
44. and approved Temperature Pressure Relief Valve installed Call the toll free technical support phone number listed on the back cover of this manual for further assistance in sizing a T amp P valve for remote storage tanks 21 T amp P VALVE DISCHARGE PIPE AWARNING Temperature Pressure Relief Valve must comply with ANSI 221 22 CSA 4 4 and ASME code Properly sized temperature pressure relief valve must be installed in opening provided Can result in overheating and excessive tank pressure Can cause serious injury or death This water heater is provided with a properly rated sized and certified combination temperature pressure T amp P relief valve by the manufacturer See Temperature Pressure Relief Valve on pages 13 14 for information on replacement and other requirements CAUTION e Temperature Pressure Relief Valve discharge pipe must terminate at adequate drain Install a discharge pipe between the T amp P valve discharge opening and a suitable floor drain Do not connect discharge piping directly to the drain unless a 6 15 2 cm air gap is provided To prevent bodily injury hazard to life or property damage the relief valve must be allowed to discharge water in adequate quantities should circumstances demand If the discharge pipe is not connected to a drain or other suitable means the water flow may cause property damage T amp P Valve Discharge Pipe Requirements Shall not be smal
45. anual must remain with the We appreciate your confidence in our products water heater PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE PRINTED 0914 327502 005 TABLE OF CONTENTS SAFE INSTALLATION USE AND 3 5 cts fasta sen terae e Eee ENEE nes 9 GENERAL SAFETY 4 Precautions a rv ema A bed 5 Grounding Instructions eic eeaeee 5 Hydrogen Gas Flammable 5 INTRODUCTION iiiter meet efte 6 Abbreviations Used ettet reet 6 EE 6 Preparing for the Installation sees 6 FEATURES AND COMPONENTS 6 lui E 6 The Eliminator self cleaning system 6 Pigh Limit SWwIECh i cio rrt Ft melins 7 Electronic Ignition Control 7 Blower Burner 7 INSTALLATION CONSIDERATIONS 8 Rough In 8 Locating the Water Heater 9 EE 9 NSF Leg Kit iiie eee 10 Ins lation Blanket cinere teens 10 Water eene reins 10 Circulati
46. ating label NOTE In addition to the factory installed Temperature Pressure Relief Valve on the water heater each remote storage tank that may be installed and piped to a water heating appliance must also have its own properly sized rated and approved Temperature Pressure Relief Valve installed Call the toll free technical support phone number listed on the back cover of this manual for technical assistance in sizing a Temperature Pressure Relief Valve for remote storage tanks For safe operation of the water heater the Temperature Pressure Relief Valve must not be removed from its designated opening nor plugged The Temperature Pressure Relief Valve must be installed directly into the fitting of the water heater designed for the relief valve Install discharge piping so that any discharge will exit the pipe within 6 inches 15 2 cm above an adequate floor drain or external to the building In cold climates it is recommended that it be terminated at an adequate drain inside the building Be certain that no contact is made with any live electrical part The discharge opening must not be blocked or reduced in size under any circumstances Excessive length over 30 feet 9 14 m or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve valve or other obstruction is to be placed between the Temperature Pressure Relief Valve and the tank Do not connect discharge piping directly to the drain un
47. closest to heater and allow water to run until it is cool enough to handle safely Close cold water inlet valve to heater Connect hose to drain valve at bottom of heater and start draining heater into suitable floor drain area Remove relief valve while heater is draining NOTE Do not replace relief valve until deliming is completed Relief valve opening will also act as a vent in case of possible contact between the delimer and the anode rod s which may produce flammable hydrogen air mixtures If relief valve appears to be limed up place it in a clean glass or plastic container adequate in size so that you can pour enough UN LIMEG into the container to cover the valve and allow space for foaming When foaming stops run fresh cool water into the container and rinse the relief valve for a few minutes If heater does not drain completely after a reasonable length of time turn off the main water supply valve to stop water from entering the tank due to a by pass problem or defective cold water inlet valve Also check for clogged drain valve opening Heater must be completely drained before introducing UN LIME Remove the cleanout cover and place a clean plastic bucket next to the cleanout opening Partially open the cold water inlet valve to allow time to accomplish the following and then close the valve While the water is being run through the tank insert a stiff wire copper tube flattened at one end or an opened wire coat ha
48. combustibles Keep ignition sources away from faucets after extended periods of non use Read instruction manual before installing using or servicing water heater Keep water heater area clear and free of combustible materials gasoline and other flammable vapors and liquids CONTAMINATED AIR A WARNING Breathing Hazard Carbon Monoxide Gas Install water heater in accordance with the Instruction Manual and NFPA 54 or CAN CSA B149 1 To avoid injury combustion and ventilation air must be taken from outdoors Do not place chemical vapor emitting products near water heater Breathing carbon monoxide can cause brain damage or death Always read and understand instruction manual Corrosion of the flue ways and vent system may occur if air for combustion contains certain chemical vapors Such corrosion may result in failure and risk of asphyxiation Combustion air that is contaminated can greatly diminish the life span of the water heater and water heater components such as igniters and burners Propellants of aerosol sprays beauty shop supplies water softener chemicals and chemicals used in dry cleaning processes that are present in the combustion ventilation or ambient air can cause such damage Do not store products of this sort near the water heater Air which is brought in contact with the water heater should not contain any of these chemicals If necessary uncontaminated air should be obtain
49. e Switch power on to unit Thermostat calls for heat Blower power relay is energized to start the blower The blower pressure switch is closed 24VAC power is applied to the Ignition Control Module The Ignition Control performs diagnostic self check on system components After 30 seconds delay the Ignition Control begins the trial for ignition by turning on the Spark Igniter and the Pilot Gas Valve The Ignition Control monitors the Flame Sensor during the ignition trial period LIGHTING amp OPERATING LABEL If the Ignition Control does not sense the pilot flame during the ignition trial period the Ignition Control shuts the Pilot Gas Valve and turns off the Spark Igniter After 5 minute delay a new trial for ignition is initiated This sequence continues until the unit lights or Call for Heat is removed If the pilot flame is proved during the ignition trial period the Ignition Control will energize the main gas control valve to start the heating cycle If the flame signal is lost during the heating cycle the Ignition Control closes the gas control valve and re starts the ignition process at step 5 10 Once the unit is satisfied the Thermostat will turn off 24vac power to the blower relay and the Ignition Control and the unit will be in standby mode until another call for heat is initiated by the thermostat See the flow chart on page 28 for more detailed information FOR YOUR SAFETY READ BEFORE OPERATING
50. e can cause serious injury or death e Turn off gas lines during installation e Contact a qualified installer or service technician for installation and service Supply gas pressure shall be measured while the water heater is not firing static pressure and while the water heater is firing at full capacity dynamic pressure If the supply gas pressure to the water heater is not between the required minimum and maximum values given in Table 3 on page 8 adjust the supply gas regulator as necessary Adjust the supply gas regulator s per the regulator manufacturer s instructions to achieve the required static and dynamic supply gas pressure Multiple Water Heater Installations In multiple water heater installations or in installations where the installed water heater s share a common gas supply main with other gas fired appliances the supply gas pressures shall be measured at each water heater with all gas fired appliances connected to a common main firing at full capacity On multiple water heater installations the supply gas line regulators shall be adjusted to provide gas pressure to each water heater within the minimum and maximum supply pressure requirements listed in Table 3 on page 8 with all gas fired appliances connected to a common gas main firing at full capacity NOTE A pressure drop of more than 1 5 W C 0 37 kPa when the Main Burner ignites is an indication of an inadequate supply of gas and can lead
51. e following instructions shall be used to calculate the size number and placement of openings providing fresh air for combustion ventilation and dilution in confined spaces The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only DO NOT refer to these illustrations for the purpose of vent installation See Venting Installation on page 18 for complete venting installation instructions OUTDOOR AIR THROUGH TWO OPENINGS FIGURE 14 The confined space shall be provided with two permanent openings one commencing within 12 inches 300 mm of the top and one commencing within 12 inches 300 mm of the bottom of the enclosure The openings shall communicate directly with the outdoors See Figure 14 Each opening shall have a minimum free area of 1 square inch per 4 000 Btu hr 550 mm2 per kW of the aggregate input rating of all appliances installed in the enclosure Each opening shall not be less than 100 square inches 645 cm2 OUTDOOR AIR THROUGH ONE OPENING FIGURE 15 16 Alternatively a single permanent opening commencing within 12 inches 300 mm of the top of the enclosure shall be provided See Figure 14 The water heater shall have clearances of at least 1 inch 25 mm from the sides and back and 6 inches 150 mm from the front of the appliance The opening shall directly communicate with the outdoors or shall communicate through a vertic
52. e property damage serious bodily injury or death UNCONFINED SPACE An Unconfined Space is one whose volume IS NOT LESS THAN 50 cubic feet per 1 000 Btu hr 4 8 cubic meters per kW of the total input rating of all appliances installed in the space Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors are considered a part of the unconfined space Makeup air requirements for the operation of exhaust fans kitchen ventilation systems clothes dryers and fireplaces shall also be considered in determining the adequacy of a space to 15 provide combustion ventilation and dilution air Unusually Tight Construction In unconfined spaces in buildings infiltration may be adequate to provide air for combustion ventilation and dilution of flue gases However in buildings of unusually tight construction for example weather stripping heavily insulated caulked vapor barrier etc additional air must be provided using the methods described in the Confined Space section that follows CONFINED SPACE A Confined Space is one whose volume IS LESS THAN 50 cubic feet per 1 000 Btu hr 4 8 cubic meters per kW of the total input rating of all appliances installed in the space Openings must be installed to provide fresh air for combustion ventilation and dilution in confined spaces The required size for the openings is dependent on the method used to provide fresh ai
53. e the threads 3 Find the 3 4 male adapter apply teflon tape to the threaded end and screw it into the 3 4 IPT opening in the cap 4 Put cap with male adapter back on the container and slide 3 4 hose over end of male adapter and fasten in place using hose clamp provided Delime using Flo Jug Method 5 Slide the hose clamp over end of hose and slide hose over the male adapter in the water heater drain opening and secure in place using hose clamp 6 Lift container to the Pour Position see Figure 27 being careful to keep the vent in the handle above the liquid level and pour the UN LIME into the heater 7T Lower container you may have to place the container on its empty carton to prevent the UN LIME from flowing back into the container 8 Let UNeLIME remain in the heater for 5 minutes and then lower the container to the Drain Position see Figure 27 9 Deliming activity is indicated by foaming on the surface of the UN LIME If there is deliming activity repeat steps 6 thru 8 Normally lime removal will be completed within one hour Severe build up of lime may take longer than an hour to complete descaling Note To check UNeLIME for continued use place some scale or white chalk in a glass with a small amount of UN LIME If the material is vigorously dissolved by the UN LIME it can be reused if not the UNeLIME should be replaced POSITION INSTALL 3 4 X 4 NIPPLE OR DRAIN VALVE NIPP
54. ed from remote or outdoor sources The limited warranty is voided when failure of water heater is due to a corrosive atmosphere See limited warranty for complete terms and conditions AIR REQUIREMENTS AWARNING Breathing Hazard Carbon Monoxide Gas Breathing carbon monoxide can cause brain damage or death Always read and understand instruction manual Install water heater in accordance with the Instruction Manual and NFPA 54 or CAN CSA B149 1 To avoid injury combustion and ventilation air must be taken from outdoors Do not place chemical vapor emitting products near water heater For safe operation an adequate supply of fresh uncontaminated air for combustion and ventilation must be provided An insufficient supply of air can cause recirculation of combustion products resulting in contamination that may be hazardous to life Such a condition often will result in a yellow luminous burner flame causing sooting of the combustion chamber burners and flue tubes and creates a risk of asphyxiation Do not install the water heater in a confined space unless an adequate supply of air for combustion and ventilation is brought in to that space using the methods described in the Confined Space section that follows Never obstruct the flow of ventilation air If you have any doubts or questions at all call your gas supplier Failure to provide the proper amount of combustion air can result in a fire or explosion and caus
55. ell gas Do not expose water heater controls to excessive gas pressure Use only the gas shown on the water heater rating label Maintain required clearances to combustibles Keep ignition sources away from faucets after extended periods of non use Ld Read instruction manual before installing using or servicing water heater A WARNING Breathing Hazard Carbon Monoxide Gas Install vent system in accordance with codes Do not operate water heater if exposed to flooding or water damage Do not operate if soot is present Do not obstruct water heater air intake with insulating jacket Do not place chemical vapor emitting products near water heater Gasandcarbon monoxide detectors are available Special consideration must be taken with installations above 10 100 3078m for standard models Breathing carbon monoxide can cause brain damage or death Always read and understand instruction manual Property Damage Hazard All water heaters eventually leak Do not install without adequate drainage Turn off power to the water heater before performing any service e Label all wires prior to disconnecting when performing service Wiring errors can cause improper and dangerous operation Verify proper operation after servicing Failure to follow these instructions can result in personal injury or death For continued protection against risk
56. emove these more stubborn mineral deposits UN LIME Professional Delimer should be used DELIMING USING FLO JUG METHOD UNeLIME in the 5 gallon size is recommended for deliming of all models Contact your local dealer distributor or water heater manufacturer Prepare the Water Heater To delime the water heater using the Flo Jug method first prepare the heater for deliming AWARNING Explosion Hazard Flammable hydrogen gases may be present Keep all ignition sources away from faucet when turning on hot water Do not smoke or have open flame or sparks in vicinity of heater Do not mix UN LIME with other chemicals Do not allow contact with magnesium aluminum or galvanized metals 31 ACAUTION Product contains phosphoric acid Keep out of reach of children Use rubber or neoprene gloves UN LIME contains phosphoric acid In case of external contact flush with cool water If irritation persists get medical attention If swallowed give 1 or 2 glasses of water or milk and call physician Get immediate medical attention for eyes Keep out of reach of children NOTE THE USE OF RUBBER OR NEOPRENE GLOVES IS RECOMMENDED ESPECIALLY IF YOU HAVE ANY OPEN SORES OR CUTS TO AVOID UNNECESSARY IRRITATION OR DISCOMFORT 1 Turn off fuel and or power supply to heater Also turn off power to any electrical device or equipment which is attached or part of the system Open hot water side of faucet
57. er function There is a marked range on the pipe nipple portion of the Eliminator that must be aligned with the top of the inlet spud A label above the jacket hole has an arrow that will point to the marked portion of the pipe nipple if the orientation is correct If the arrow does not point within the marked range on the pipe nipple adjust the pipe nipple to correct A pipe union is supplied with the Eliminator to reduce the probability of misaligning the Eliminator accidentally while tightening the connection to the inlet water supply line Improper orientation of the Eliminator can cause poor performance of the heater and can significantly reduce outlet water temperatures during heavy draws Note The Eliminator have 1 3 or 7 cross tubes FIGURE 2 HIGH LIMIT SWITCH The digital thermostat Figure 3 contains the high limit energy cutout switch The high limit switch interrupts burner gas flow should the water temperature reach 203 F 95 C In the event of high limit switch operation the water heater cannot be restarted unless the water temperature is reduced to approximately 120 F 49 C The high limit reset button on the front of the control then needs to be depressed Continued manual resetting of high limit control preceded by higher than usual water temperature is evidence of high limit switch operation Contact your dealer or service agent if continued high limit switch operation occurs RESET BUTTO
58. er is equipped with an ignition control that incorporates a diagnostic system to assist in troubleshooting the water heater The green LED codes on the ignition module are as follows TABLE 9 2 FLASHES 5 Minutes Retry Delay 3 FLASHES Recycle flame failed during run 4 FLASHES Flame sensed out of sequence 6 FLASHES Control Internal Error 7 FLASHES Flame rod shorted to ground 8 FLASHES Low secondary voltage supply If an internal control failure is indicated replace the ignition control Usethisdiagnosticsysteminconjunctionwith TROUBLESHOOTING and the SEQUENCE OF OPERATION to troubleshoot the water heater ELECTRICAL SERVICING Label all wires prior to disconnection when servicing controls Wiring errors can cause improper and dangerous operation Verify proper operation after servicing FOR YOUR INFORMATION START UP CONDITIONS Smoke Odor It is not uncommon to experience a small amount of smoke and odor during the initial start up This is due to burning off of oil from metal parts and will disappear in a short while Strange Sounds Possible noises due to expansion and contraction of some metal parts during periods of heat up and cool down do not necessarily represent harmful or dangerous conditions Condensation causes sizzling and popping within the burner area during heating and cooling periods and should be considered normal OPERATIONAL CONDITIONS Hot Water Odor In each water hea
59. er run until the water is no longer hot Then close the hot water faucet Connect a hose to the drain valve and terminate it to an adequate drain Ensure the drain hose is secured before and during the entire flushing procedure Flushing is performed with system water pressure applied to the water heater Open the water heater drain valve to flush the storage tank Flush the water heater storage tank to remove sediment and allow the water to flow until it runs clean Close the water heater drain valve when flushing is completed Remove the drain hose 10 11 Fill the water heater see Filling The Water Heater in this manual Turn on the electrical supply to place the water heater back in operation 12 Turn on the gas supply to the water heater at the Main Gas Shutoff Valve Allow the water heater to complete several heating cycles to ensure it is operating properly 13 PERIODIC REMOVAL OF LIME DEPOSITS FROM 30 TANK TYPE COMMERCIAL WATER HEATERS The amount of calcium carbonate lime released from water is in direct proportion to water temperature and usage see chart The higher the water temperature or water usage the more lime deposits are dropped out of the water This is the lime scale which forms in pipes heaters and on cooking utensils Lime accumulation may affect the life of equipment the efficiency of the heater and fuel consumption characteristics The usage of water softening equipment greatly
60. exist water softening or the threshold type of water treatment is recommended This will protect the dishwashers coffee urns water heaters water piping and other equipment See the Maintenance Section in this manual for sediment and lime scale removal procedures CIRCULATION PUMPS A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the water heater See Water Piping Diagrams in this manual for installation location of circulating pumps See the Circulation Pump Wiring Diagrams Figure 9 in this manual for electrical hookup information Install in accordance with the current edition of the National Electrical Code NFPA 70 or the Canadian Electrical Code CSA C22 1 Stainless steel circulating pumps are recommended for use with commercial water heaters Some circulating pumps are manufactured with sealed bearings and do not require further lubrication Some circulating pumps must be periodically oiled Refer to the pump manufacturer s instructions for lubrication requirements CIRCULATING PUMP WIRING DIAGRAM STORAGE TANK OR BUILDING RECIRCULATION FIELD SUPPLIED TEMPERATURE CONTROL INSTALLED IN THE STORAGE TANK OR CIRCULATING LOOP RETURN LINE NOTE USE SEPARATE 120 VAC POWER SUPPLY FOR PUMP CIRCUIT DO NOT SHARE POWER WITH WATER HEATER AS THIS MAY CAUSE ELECTRICAL LINE NOISE AND LEAD TO ERRATIC CONTROL SYSTEM OPERATION L1 HOT 120 VAC POWER
61. f calibration of upper and lower temperature probes Replace probes if out of specification Insufficient hot water Thermostat set too low Set thermostat dial to a higher See WATER TEMPERATURE temperature CONTROL WARNING on page Upper and or lower temperature Call qualified service agency Check continuity and resistance Ohms 12 probe out of calibration of upper and lower temperature probes Replace probes if out of specification Main manual gas shutoff valve Open main manual gas shutoff partially closed valve to fullest extent Heater too small for demand Space usage to give heater time to restore water temperature Heater recovery is slower Call qualified service agency Check gas input If incorrect check for inlet air blockage and or flue gas exhaust blockage Water temperature too hot Thermostat set too high Set thermostat to a lower setting SE Rumbling Sediment accumulation on Drain a quantity of water through Delime heater bottom of tank drain valve If rumbling persists call a qualified service agency Ticking or metallic sounds Expansion and contraction normal Pounding or water hammer Air chambers in piping have Drain piping system and refill Follow the manufacturer s instructions become waterlogged Thermal Heater must be off while this for proper charging of the thermal expansion tank damaged is being done Check thermal expansion tank improperly charged or expansion tank char
62. field supplied regulators to lower the gas pressure to less than 14 W C 3 49 kPa 1 2 PSI Gauge Appliances require gas regulators that are properly sized for the water heater input and deliver the rating plate specified pressures Gas supply systems where pressure exceeds 5 PSI 34 5 kPa often require multiple regulators to achieve desired pressures Systems in excess of 5 PSI building pressure should be designed by gas delivery professionals for best performance Water heaters connected to gas supply systems that exceed 14 W C 3 49 kPa 1 2 PSI Gauge at any time must be equipped with a gas supply regulator GAS PRESSURE REQUIREMENTS All models require a minimum gas supply pressure as shown in Table 3 on page 8 The minimum supply pressure is measured while gas is flowing dynamic pressure The supply pressure dynamic should never fall below that indicated in Table 3 page 8 The supply pressure should be measured with all gas fired appliances connected to the common main firing at full capacity If the supply pressure drops more than 1 5 W C 0 37 kPa as gas begins to flow to the water heater then the supply gas system including the gas line and or the gas regulator may be restricted or undersized See Supply Gas Regulator section and Gas Piping section of this manual The gas control valve on all models has a maximum gas supply pressure limit of 14 W C 3 48 kPa The maximum supply pressure is measured while gas is not
63. g this water heater Properly installed and maintained it should give you years of trouble free service ABBREVIATIONS USED Abbreviations found in this Instruction Manual include ANSI American National Standards Institute ASME American Society of Mechanical Engineers AHRI Air Conditioning Heating and Refrigeration Institute NEC National Electrical Code National Fire Protection Association UL Underwriters Laboratory CSA Canadian Standards Association QUALIFICATIONS Qualified Installer or Service Agency Installation and service of this water heater requires ability equivalent to that of a Qualified Agency as defined by ANSI below in the field involved Installation skills such as plumbing air supply venting gas supply and electrical supply are required in addition to electrical testing skills when performing service ANSI 2223 1 2012 Sec 3 3 85 Qualified Agency Any individual firm corporation or company that either in person or through a representative is engaged in and is responsible for 1 the installation testing or replacement of gas piping or 2 the connection installation testing repair or servicing of appliances and equipment that is experienced in such work that is familiar with all precautions required and that has complied with all the requirements of the authority having jurisdiction If you are not qualified as defined by ANSI above and licensed
64. ge pressure improperly sized when the water system pressure is zero Water leaks Drain valve not closed tightly If drain valve cannot be closed tightly replace If leakage source cannot be Shut off gas supply to heater Repair or in case of suspected tank corrected or identified call and close cold water inlet valve leakage be certain to confirm before qualified service agency to heater replacing heater Gas odors Possible gas leaks Shut off gas supply to heater and call gas company at once 34 WATER PIPING DIAGRAMS 9 1 5 eunjeJeduie yue y uey 4 195 eq jejsouueu es 941 s 4uei y euy y pue eq pinous yue 941 eBesn Maut UMOYS BdIAIBS Uejs s y Aug jo upes einsseJd jou Buas pue 941 peusjeJg SALON NO TW HOO YNVL Q3HSINIJ NOISNVdX3 Alddns H31VM t NOLLO3NNOO M31VM Lv H lt M31V3H LOH GR RH N3dO O1 dL 3did HOLIMS H3JVM
65. gure 13 and tables on pages 19 and 20 should be used for horizontally manifolding two or more heaters VENT TOP CAP gt COMMON VENT gt TOTAL VENT HEIGHT MANIFOLD VENT CONNECTORS CAPPED MANIFOLD 7 _ CONNECTOR RISE HEATER FIGURE 13 TABLE 6 TECHNICAL DATA VENTING TYPE B GAS VENT Multiple Gas Fired Tank Type Heaters When venting multiple tank type heaters using Type B vent pipe follow the installation diagram figure 13 and tables below which give sizing and data based upon NFPA 54 ANSI VENT COMMON VENT MANIFOLD TEE CAPPED VENT CONNECTORS VENT CONNECTOR RISE 2223 2006 HEATER Model BTL 120 Total Vent Height Feet Vent connector size 6 inches O 6 e 170 15 20 30 52 100 InputBtuhr Rise 7 VentConnectorDiameter Inches 120000 t 6 6 5 5 5 5 5 5 Combined Input in Number of 120 Heaters Thousands of Btu hr 2 240 000 17 7 e 6 6 jo 6 6 3 360 000 8 asa 7 7 7 e 6 6 480 000 8 1 9 9 8 7 7 6 Model BTL 154 Model BTE 154 Ventconnectorsize 6 inches o 6 j e 142 15 20 30 52 100 Rise 7 1 VentConnectorDiameter Inches 499 e f e e e e amp 6 29400 ot e 6 e e 6 6 e 6 1400 6 e jo 6 6 6 6 6 Manifold and Common Vent
66. installed in opening provided Can result in overheating and excessive tank pressure Can cause serious injury or death ANODE ROD INSPECTION CAUTION Avoid water heater damage Inspection and replacement of anode rod required The anode rod is used to protect the tank from corrosion Most hot water tanks are equipped with an anode rod The submerged rod sacrifices itself to protect the tank Instead of corroding tank water ions attack and eat away the anode rod This does not affect water s taste or color The rod must be maintained to keep tank in operating condition Anode deterioration depends on water conductivity not necessarily water condition A corroded or pitted anode rod indicates high water conductivity and should be checked and or replaced more often than an anode rod that appears to be intact Replacement of a depleted anode rod can extend the life of your water heater Inspection should be conducted by a qualified technician and at a minimum should be checked annually after the warranty period Artificially softened water is exceedingly corrosive because the process substitutes sodium ions for magnesium and calcium ions The use of a water softener may decrease the life of the water heater tank The anode rod should be inspected after a maximum of three years and annually thereafter until the condition of the anode rod dictates its replacement Anode rod replacement is not covered by warranty
67. it part number 9008883005 is needed only for applications that must conform to NSF ANSI Standard 5 The installed height of the water heater will increase by 4 10 2 cm when the leg kit is installed Follow these steps to install the Leg Kit Use caution to prevent damage to the unit when installing the Leg Kit 1 2 Lift tilt or lay the unit on its side to access the bottom of the legs Position the extension under leg aligning the holes in the leg extension with the holes in the leg Assemble the bolt bevel washers flat washers and nut through the aligned holes in the leg and leg extension as shown in Figure 8 Once in place tighten the nut and bolt assembly Torque to 70 ft lbs 9 67 kgf m Insure that all four nut and bolt assemblies are torqued to the specified value before placing the unit on the floor 10 INSULATION BLANKET AWARNING Breathing Hazard Carbon Monoxide Gas Do not obstruct water heater air intake with insulating blanket Gas and carbon monoxide detectors are available Install water heater in accordance with P me instruction manual Breathing carbon monoxide can cause brain damage or death Always read and understand instruction manual Insulation blankets are available to the general public for external use on gas water heaters but are not necessary with these products The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage
68. ive 5 minutes for any residual gas to clear 5 Open the Supply Gas Pressure Port on the gas control valve by turning the center screw counter clockwise Connect the manometer to the supply gas pressure test port see Figure 22 6 Open the Main Gas Shutoff Valve 7 Measure and record the supply gas pressure this is a static supply gas pressure reading while the water heater is not firing GAS SUPPLY PRESSURE TEST PORT GAS MANIFOLD PRESSURE TEST PORT FIGURE 22 TOP VIEW Lighting The Water Heater 1 Turn the water heater s on off switch to the on position 2 Adjust the thermostat to the desired water temperature 3 Record the supply gas pressure when the 24 VAC Gas Valve is energized and the Burner is operating This is a dynamic gas pressure reading while the water heater is firing Compare the actual supply gas pressure reading recorded above to the required minimum maximum values given in Table 3 on page 8 Adjust supply gas pressure as necessary see the instructions that follow 5 After the supply gas pressure adjustments are complete turn off the water heater and close the Main Gas Supply Shut Off Valve Disconnect the manometer from the Supply Gas Pressure Port and turn the center screw clockwise until the port is closed Supply Gas Pressure Adjustment A WARNING e Do not use water heater with any gas other than the gas shown on the rating A label Excessive gas pressure to gas valv
69. l be provided with two permanent vertical ducts one commencing within 12 inches 300 mm of the top and one commencing within 12 inches 300 mm of the bottom of the enclosure The vertical ducts shall communicate directly with the outdoors See Figure 17 Each duct opening shall have a minimum free area of 1 square inch per 4 000 Btu hr 550 mm per kW of the aggregate input rating of all appliances installed in the enclosure 17 When ducts are used they shall be of the same cross sectional area as the free area of the openings to which they connect The minimum dimension of rectangular air ducts shall be not less than 3 inches AIR FROM OTHER INDOOR SPACES FIGURE 18 The confined space shall be provided with two permanent openings one commencing within 12 inches 300 mm of the top and one commencing within 12 inches 300 mm of the bottom of the enclosure See Figure 18 Each opening shall communicate directly with an additional room s of sufficient volume so that the combined volume of all spaces meets the criteria for an Unconfined Space Each opening shall have a minimum free area of 1 square inch per 1 000 Btu hr 2200 mm per kW of the aggregate input rating of all appliances installed in the enclosure Each opening shall not be less than 100 square inches 645 cm VENTING INSTALLATION VENTING THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE G
70. lation of 180 F 82 C water The circulation should be just enough to provide 180 F 82 C water at the point of take off to the dishwashing machine Adjust flow by throttling a full port ball valve installed in the circulating line on the outlet side of the pump Never throttle flow on the suction side of a pump See Water Piping Diagrams in this manual CLOSED WATER SYSTEMS Water supply systems may because of code requirements or such conditions as high line pressure among others have installed devices such as pressure reducing valves check valves and back flow preventers Devices such as these cause the water system to be a closed system THERMAL EXPANSION As water is heated it expands thermal expansion In a closed system the volume of water will grow when it is heated As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion Thermal expansion can cause premature tank failure leakage This type of failure is not covered under the limited warranty Thermal expansion can also cause intermittent Temperature Pressure Relief Valve operation water discharged from the valve due to excessive pressure build up This condition is not covered under the limited warranty The Temperature Pressure Relief Valve is not intended for the constant relief of thermal expansion A properly sized thermal expansion tank must be installed on all closed systems to control the harmful effec
71. lent to that of a licensed tradesman in the field involved see Qualifications on page 6 Do not place the water heater in operation if any part has been under water Immediately call a qualified service technician to inspect the water heater and to replace any part of the control system and any gas control which has been under water Light the water heater in accordance with the Lighting and Operation Instruction label on the water heater and in this manual on page 27 The water heaters covered by this manual are equipped with an electronic control system that automatically sequences the Blower the Igniter the 24 VAC Gas Valve Burner ignition and flame sensing The control system will lock out after three unsuccessful ignition attempts Before attempting start up thoroughly study and familiarize yourself with the exact Sequence Of Operation see the written Sequence Of Operation on page 27 and the Sequence Of Operation Flow Chart on page 28 Be certain that the water heater is full of water that air is purged from the gas and water lines and that there are no leaks in the gas and water lines Ensure all inlet water valves are open Filling The Water Heater Follow these steps to fill the water heater prior to start up 1 Close the heater drain valve 2 Open a nearby hot water faucet to permit the air in the system to escape 3 Fully open the cold water inlet valve allowing the piping water heater to fill with water
72. ler in size than the outlet pipe size of the valve or have any reducing couplings or other restrictions Shall not be plugged or blocked Shall not be exposed to freezing temperatures Shall be of material listed for hot water distribution Shall be installed so as to allow complete drainage of both the Temperature Pressure Relief Valve and the discharge pipe Must terminate a maximum of six inches above a floor drain or external to the building In cold climates it is recommended that the discharge pipe be terminated at an adequate drain inside the building Shall not have any valve or other obstruction between the relief valve and the drain INSTALLATION DIAGRAMS INLET OUTLET USAGE Use of the top inlet water connection requires an inlet dip tube refer to figure 19 The tube is supplied in the heater Follow caution labels if applying heat to this fitting Do not allow pipe dope to contact the plastic tube during installation TUBE INLET INSTALLATION TOP INLET EXTENTION DIP Di FIGURE 19 22 HEATER WIRING ELECTRICAL WIRING All electrical work must be installed in accordance with the National Electrical Code ANSI NFPA 70 or the Canadian Electrical Code CSA C22 1 and local requirements When installed the water heater must be electrically grounded in accordance with local codes in the absence of local codes with the National Electrical Code ANSI NFPA 70 or the Can
73. less a 6 15 2 cm air gap is provided To prevent bodily injury hazard to life or property damage the relief valve must be allowed to discharge water in adequate quantities should circumstances demand If the discharge pipe is not connected to a drain or other suitable means the water flow may cause property damage CAUTION e Temperature Pressure Relief Valve discharge pipe must terminate at adequate drain T amp P Valve Discharge Pipe Requirements Shall not be smaller in size than the outlet pipe size of the valve or have any reducing couplings or other restrictions Shall not be plugged or blocked Shall not be exposed to freezing temperatures Shall be of material listed for hot water distribution Shall be installed so as to allow complete drainage of both the Temperature Pressure Relief Valve and the discharge pipe Must terminate a maximum of six inches above a floor drain or external to the building In cold climates it is recommended that the discharge pipe be terminated at an adequate drain inside the building Shall not have any valve or other obstruction between the relief valve and the drain A DANGER e Burn hazard e Hot water discharge e Keep clear of Temperature Pressure Relief Valve discharge outlet The Temperature Pressure Relief Valve must be manually operated at least twice a year Caution should be taken to ensure that 1 no one is in front of or around the outlet of the Tempe
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75. lve and Spark off 5 minutes retry delay Loss of flame signal Close Main valve and Pilot valve Thermostat is satisfied Blower off Blower Prover opens Ignition Control off Gas Valve closes FIGURE 24 28 connections for leakage repair or reseal as necessary Remove all soot or other obstructions from chimney which will retard free draft INTAKE AIR SCREEN The intake air screen is attached to the inlet end of the combustion blower Inspect the intake air screen every six months The intake air screen should be cleaned of any buildup of debris or foreign material TEMPERATURE PRESSURE RELIEF VALVE TEST A DANGER Burn hazard Hot water discharge Keep clear of Temperature Pressure Relief Valve discharge outlet It is recommended that the Temperature Pressure Relief Valve should be checked to ensure that it is in operating condition every 6 months When checking the Temperature Pressure Relief Valve operation make sure that 1 no one is in front of or around the outlet of the Temperature Pressure Relief Valve discharge line and 2 that the water discharge will not cause any property damage as the water may be extremely hot Use care when operating valve as the valve may be hot To check the relief valve lift the lever at the end of the valve several times see Figure 25 The valve should seat properly and operate freely If after manually operating the valve itf
76. n Adjust thermostat so water heater shall operate continuously 5 Inspect vent system for leakage after 5 minutes of main burner operation 6 After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above return doors windows exhaust fans fireplace dampers and any other gas burning appliance to their previous conditions of use 26 T If improper venting is observed during any of the above tests the venting system must be corrected FAILURE TO CORRECT BACK DRAFTS MAY CAUSE AIR CONTAMINATION AND UNSAFE CONDITIONS If the back draft cannot be corrected by the normal method or if a suitable draft cannot be obtained a blower type flue gas exhauster must be employed to assure proper venting and correct combustion CHECKING THE INPUT Follow these instructions to determine the firing rate of the water heater 1 Follow the procedure described in the Initial Start Up section on page 25 to measure the static and dynamic supply gas pressures Verify that the static and dynamic supply gas pressures conform to the values listed in Table 3 on page 8 Use this formula to clock the meter Be sure that other gas consuming appliances are not operating during this interval 3600 T x Btuh T Time in seconds to burn one cubic foot of gas Btu s per cubic foot of gas Btuh Actual heater input Example BTL 199 T 18 1 seconds 1000 BTU C
77. n device which automatically lights the burner Do not try to light the burner by hand Move Off On switch to the Off position Wait five 5 minutes to clear out any gas If you then smell gas STOP Follow B in the safety information above on this label If you don t smell gas go on to next step Move Off On switch to the On position 7 Turn on all electric power to the appliance 8 Set thermostat to desired setting 9 If the appliance will not operate follow the instructions To Turn Off Gas To Appliance and call your service technician or gas supplier On Off Switch TO TURN OFF GAS TO APPLIANCE 1 Set the thermostat to lowest setting 2 Turn off all electric power to appliance if service is to be performed 3 Move Off On switch to the Off position do not force FIGURE 23 27 SEQUENCE OPERATION FLOW CHART Description of this flow chart can be found in the SEQUENCE OF OPERATION section found on page 27 Switch power on to unit Thermostat calls for heat Blower power relay is energized to start blower Blower engages Prover Switch 24VAC power to the Ignition Control and self check 30 Seconds Prepurge Trial for ignition Ignition Control provides power to Spark Igniter and Pilot Gas Valve and monitors Flame Sensor to determine if Burner is lit Flame Proved Spark Off and Open main Gas Valve Ignition Control monitors flame signal Close pilot gas va
78. ng it unnecessary to install high altitude orifices Call the local gas or utility company to verify BTU content Due to the input rate reduction at high altitudes the output rating of the water heater is also reduced and should be compensated for in the sizing of the equipment for applications INSTALLATION REQUIREMENTS GAS SUPPLY SYSTEMS Low pressure building gas supply systems are defined as those systems that cannot under any circumstances exceed 14 W C 3 49 kPa 1 2 PSI Gauge These systems do not require pressure regulation Measurements should be taken to insure that gas pressures are stable and fall within the requirements stated on the water heater rating plate Readings should be taken with all gas burning equipment off static pressure and with all gas burning equipment running at maximum rate dynamic pressure The gas supply pressure must be stable within 1 5 W C 0 37 kPa from static to dynamic pressure to provide good performance Pressure drops that exceed 1 5 W C 0 37 kPa may cause rough starting noisy combustion or nuisance outages Increases or spikes in static pressure during off cycles may cause failure to ignite or in severe cases damage to appliance gas valves If your low pressure system does NOT meet these requirements the installer is responsible for the corrections High Pressure building supply systems use pressures that exceed 14 W C 3 49 kPa 1 2 PSI Gauge These systems must use
79. nger through the cleanout opening and scrape out any loose deposits of scale or sediment This is an economical way to avoid unnecessary usage of the deliming solution Repeat the opening and closing of the cold water inlet valve as necessary but be sure the heater is completely drained when ready to introduce the UN LIME Upon completion reinstall the cleanout cover and use a new cleanout cover gasket part number 9004099215 Remove the drain valve Install the long plastic male adapter insert fitting into the drain valve opening of heater after applying Teflon tape or paste to threads Tighten firmly by hand and use wrench or adjustable pliers to check for secure connection Do not over tighten to avoid damage to threads and fittings Prepare the Up N Down Transfer Kit The next step is the preparation on the Up N Down Transfer Kit if you have not already done so 1 With the 5 gallon Up N Down container in the vertical position unscrew the plastic vent cap in the handle and pierce the plastic membrane over the vent boss under the cap to allow the container to vent Note If your container does not have the vent cap and vent boss drill a 3 16 hole in the handle When you have finished deliming you will be able to plug this drilled vent with the stainless steel screw that is supplied with the kit 2 Remove the container s cap and cut the plastic membrane located in the 3 4 IPT opening in the cap Take care to not damag
80. of fire e Do not install water heater on carpeted floor e Do not operate water heater if exposed to flooding or water damage AWARNING Use joint compound or Teflon tape compatible with propane gas Leak test before placing the water heater in operation Disconnect gas piping and main gas shutoff valve before leak testing Install sediment trap in accordance with NFPA 54 AWARNING e Do not use water heater with any gas other than the gas shown on the rating label Excessive gas pressure to gas valve can cause serious injury or death e Turn off gas lines during installation e Contact a qualified installer or service technician for installation and service AWARNING Jumping out control circuits or components can result in property damage personal injury or death e Service should only be performed by a qualified service technician using proper test equipment e Altering the water heater controls and or wiring in any way could result in permanent damage to the controls or water heater and is not covered under the limited warranty Any bypass or alteration of the water heater controls and or wiring will result in voiding the water heater warranty GENERAL SAFETY INFORMATION Read understand this instruction manual and the safety messages herein before installing operating or servicing this water heater Failure to follow these instructions and safety messages
81. on 5 2 2 2 eta ux etta 10 High Altitude Installations een 11 INSTALLATION REQUIREMENTS 12 Gas Supply Systermis tte eet 12 Gas Pressure 12 Supply Gas 12 POWER SUPP site ricis sonet ee Rio 12 Water Temperature Control and Mixing Valves 12 Dishwashing 13 Closed Water 2 2 13 Thermal niece ctc 13 Temperature Pressure Relief Valve 13 Combustible Material 14 Contaminated Air reete nera 14 Air Requirements 24 15 Unconfined uie 15 Confined Space ch Dee SED edu 15 Fresh Air Openings for Confined Spaces 16 Outdoor Air Through Two Openings 16 Outdoor Air Through One Opening 16 Outdoor Air Through Two Horizontal Ducts 16 Outdoor Air Through Two Vertical Ducts 17 Air From Other Indoor
82. or certified as required by the authority having jurisdiction to perform a given task do not attempt to perform any of the procedures described in this manual If you do not understand the instructions given in this manual do not attempt to perform any procedures outlined in this manual PREPARING FOR THE INSTALLATION 1 Read the General Safety Information section pages 4 5 of this manual first and then the entire manual carefully If you don t follow the safety rules the water heater will not operate properly It could cause DEATH SERIOUS BODILY INJURY AND OR PROPERTY DAMAGE This manual contains instructions for the installation operation and maintenance of the gas fired water heater It also contains warnings throughout the manual that you must read and be aware of All warnings and all instructions are essential to the proper operation of the water heater and your safety Since we cannot put everything on the first few pages RE AD THE ENTIRE MANUAL BE FORE ATTEMPTING TO INSTALL OR OPERATE THE WATER HEATER 2 The installation must conform with these instructions and the local code authority having jurisdiction In the absence of local codes the installation must comply with the current editions of the National Fuel Gas Code ANSI Z223 1 NFPA 54 or CAN CSA B149 1 the Natural Gas and Propane Installation Code All documents are available from the Canadian Standards Association 8501 East Pleasant Valley Road Cleveland OH 44131
83. or death WARNING indicates a potentially hazardous WARNING situation which if not avoided could result in injury or death CAUTION indicates a potentially hazardous situation which if not avoided could result CAUTION minor or moderate injury CAUTION used without the safety alert symbol indicates a potentially hazardous CAUTION situation which if not avoided could result in property damage All safety messages will generally tell you about the type of hazard what can happen if you do not follow the safety message and how to avoid the risk of injury The California Safe Drinking Water and Toxic Enforcement Act requires the Governor of California to publish a list of substances known to the State of California to cause cancer birth defects or other reproductive harm and requires businesses to warn of potential exposure to such substances WARNING This product contains a chemical known to the State of California to cause cancer birth defects or other reproductive harm This appliance can cause low level exposure to some of the substances listed in the Act APPROVALS GAS FIRED slic UL AR 2 CERTIFIED UL www ahridirectory org LISTED HLW Low Lead Content WATER QUALITY GENERAL SAFETY INFORMATION Fire or Explosion Hazard Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance e Avoid all ignition sources if you sm
84. r to the confined space AND the total Btu hr input rating of all appliances installed in the space Exhaust Fans Where exhaust fans are installed additional air shall be provided to replace the exhausted air When an exhaust fan is installed in the same space with a water heater sufficient openings to provide fresh air must be provided that accommodate the requirements for all appliances in the room and the exhaust fan Undersized openings will cause air to be drawn into the room through the water heater s vent system causing poor combustion Sooting serious damage to the water heater and the risk of fire or explosion may result It can also create a risk of asphyxiation Louvers and Grilles The free areas of the fresh air openings in the instructions that follow do not take in to account the presence of louvers grilles or Screens in the openings The required size of openings for combustion ventilation and dilution air shall be based on the net free area of each opening Where the free area through a design of louver or grille or screen is known it shall be used in calculating the size of opening required to provide the free area specified Where the louver and grille design and free area are not known it shall be assumed that wood louvers will have 25 free area and metal louvers and grilles will have 7596 free area Non motorized louvers and grilles shall be fixed in the open position FRESH AIR OPENINGS FOR CONFINED SPACES Th
85. rature Pressure Relief Valve discharge line and 2 the water manually discharged will not cause any bodily injury or property damage because the water may be extremely hot If after manually operating the valve it fails to completely reset and continues to release water immediately close the cold water inlet to the water heater follow the draining instructions in this manual and replace the Temperature Pressure Relief Valve with a properly rated sized new one NOTE The purpose of a Temperature Pressure Relief Valve is to prevent excessive temperatures and pressures in the storage tank The T amp P valve is not intended for the constant relief of thermal expansion A properly sized thermal expansion tank must be installed on all closed systems to control thermal expansion 14 see Closed Water Systems and Thermal Expansion on page 13 If you do not understand these instructions or have any questions regarding the Temperature Pressure Relief Valve call the toll free number listed on the back cover of this manual for technical assistance COMBUSTIBLE MATERIAL STORAGE AWARNING Fire or Explosion Hazard Do not store or use gasoline or other flammable vapors liquids in the vicinity of this or any other appliance e Avoid all ignition sources if you smell gas Do not expose water heater controls to excessive gas pressure e Use only the gas shown on the water heater rating label e Maintain required clearances to
86. reduces the hardness of the water However this equipment does not always remove all of the hardness lime For this reason it is recommended that a regular schedule for deliming be maintained The time between cleaning will vary from weeks to years depending upon water conditions and usage The depth of lime buildup should be measured periodically Heaters equipped with cleanouts will have about 2 of lime buildup when the level of lime has reached the bottom of the cleanout opening A schedule for deliming should then be set up based on the amount of time it would take for a 1 buildup of lime It is recommended that the water heater initially be inspected after 6 months Example 1 Initial inspection after 6 months shows 1 2 of lime accumulation Therefore the heater should be delimed once a year Example 2 Initial inspection after 6 months shows 2 of lime accumulation Therefore the heater should be delimed every 3 months POUNDS OF LIME DEPOSITED VS TEMPERATURE AND WATER USAGE 210 tt BIWER i Yt B 4 E ET 500 WATER USAGE IN GALLONS PER DAY SN 3800 FIGURE 26 DELIMING SOLVENTS UN LIME is recommended for deliming UN LIME is a patented food grade acid which is safe to handle and does not create the harmful fumes which are associated with other products UN LIME may be obtained from your dealer distributor or water heater manufacturer
87. s previously used with a non potable water heating appliance When the system requires water for space heating at temperatures higher than required for domestic water purposes a tempering valve must be installed Please refer to Water Piping Diagrams beginning on page 35 of this manual for suggested piping arrangements These water heaters cannot be used in space heating applications only Thermometers not Supplied Thermometers should be obtained and field installed as shown in the installation diagrams Thermometers are installed in the system as a means of detecting the temperature of the outlet water supply Water Piping Diagrams This manual provides detailed water piping diagrams for typical methods of application for the water heaters see Water Piping Diagrams beginning on page 35 The water heater may be installed by itself or with a separate storage tank When used with a separate storage tank the circulation may be either by gravity or by means of circulating pump Adjust flow by throttling a full port ball valve installed in the circulating line on the outlet side of the pump Never throttle flow on the suction side of a pump See the Water Piping Diagrams beginning on page 35 NOTE In addition to the factory installed Temperature Pressure Relief Valve T amp P valve on the water heater each remote storage tank that may be installed and piped to a water heating appliance must also have its own properly sized rated
88. state law requiring a certain water temperature at the point of use then special precautions must be taken In addition to using the lowest possible temperature setting that satisfies the demand of the application a Mixing Valve should be installed at the water heater see Figure 10 or at the hot water taps to further reduce system water temperature Mixing valves are available at plumbing supply stores Consult a Qualified Installer or Service Agency Follow mixing valve manufacturer s instructions for installation of the valves TABLE 5 Time for Permanent Burns 2nd amp 3rd Degree Most Severe Burns Water Temperature Time for 1st Degree Burn Less Severe Burns 122 50 131 55 140 60 149 65 154 68 WATER INLET FIGURE 10 DISHWASHING MACHINES All dishwashing machines meeting the National Sanitation Foundation requirements are designed to operate with water flow pressures between 15 and 25 pounds per square inch 103 kPa and 173 kPa Flow pressures above 25 pounds per square inch 173 kPa or below 15 pounds per square inch 103 kPa will result in improperly sanitized dishes Where pressures are high a water pressure reducing or flow regulating control valve should be used in the 180 F 82 C line to the dishwashing machine and should be adjusted to deliver water pressure between these limits The National Sanitation Foundation also recommends circu
89. stem that has not been used for a long period of time generally two weeks or more Hydrogen gas is extremely flammable and explosive To prevent the possibility of injury under these conditions we recommend that the hot water faucet located farthest away from the water heater be opened for several minutes before any electrical appliances which are connected to the hot water system are used such as a dishwasher or washing machine If hydrogen gas is present there will probably be an unusual sound similar to air escaping through the pipe as the hot water faucet is opened There must be no smoking or open flame near the faucet at the time it is open HIGH WATER TEMPERATURE SHUT OFF SYSTEM This water heater is equipped with a manual reset type high limit Energy Cutout switch The high limit switch interrupts the main burner gas flow should water temperature reach 203 F 95 In the event of high limit switch operation the water heater cannot be restarted unless the water temperature is reduced to approximately 120 F 49 C The high limit reset button on the front of the thermostat then needs to be depressed See Figure 2 for the location of the reset button TROUBLESHOOTING COMPLAINT CAUSE 5 QUALIFIED SERVICE AGENCY Water not hot enough Thermostat set too low Set thermostat dial to a higher temperature Upper and or lower temperature Call qualified service agency Check continuity and resistance Ohms probe out o
90. talled 18 or more above the floor This may reduce the risk if location in such an area cannot be avoided Do not install this water heater directly on a carpeted floor A fire hazard may result Instead the water heater must be placed on a metal or wood panel extending beyond the full width and depth by at least 3 inches in any direction If the heater is installed in a carpeted alcove the entire floor shall be covered by the panel The heater shall be located or protected so it is not subject to physical damage by a moving vehicle Flammable items pressurized containers or any other potential fire hazardous articles must never be placed on or adjacent to the heater Open containers or flammable material should not be stored or used in the same room with the heater The heater must not be located in an area where it will be subject to freezing Locate it near a floor drain The heater should be located in an area where leakage from heater or connections will not result in damage to adjacent area or to the lower floors of the structure When such locations cannot be avoided a suitable drain pan should be installed under heater Such pans should be fabricated with sides atleast 2 deep with length and width atleast 2 greater than diameter of heater and must be piped to an adequate drain Pan must not restrict combustion air flow CLEARANCES This water heater is approved for installation on combustible flooring in an alcove
91. tank heaters The water heaters covered by this manual meet or exceed the Energy Policy Act standards with respect to insulation and standby heat loss requirements making an insulation blanket unnecessary Should you choose to apply an insulation blanket to this heater you should follow these instructions See the Features and Components section of this manual for identification of components mentioned below Failure to follow these instructions can restrict the air flow required for proper combustion potentially resulting in fire asphyxiation serious personal injury or death e DO NOT apply insulation to the front of the combustion chamber flange plate to insure that the spark igniter flame sensor and sightglass remain uncovered DO NOT cover the gas control valve or the Temperature Pressure Relief Valve DO NOT apply insulation within 5 13 cm of the blower to insure the safe operation of the blower assembly DO NOT apply insulation on the control box that encloses the thermostat ignition control and variable frequency drive DO NOT cover the instruction manual Keep it on the side of the water heater or nearby for future reference DO obtain new warning and instruction labels from the manufacturer for placement on the blanket directly over the existing labels DO inspect the insulation blanket frequently to make certain it does not sag thereby obstructing combustion air flow HARD WATER Where hard water conditions
92. ter there is installed at least one anode rod for corrosion protection of the tank Certain water conditions will cause a reaction between this rod and the water The most common complaint associated with the anode rod is one of a rotten egg smell in the hot water The smell is a result of four factors which must all be present for the odor to develop a b C A concentration of sulfate in the supply water Little or no dissolved oxygen in the water A sulfate reducing bacteria which has accumulated within the water heater this harmless bacteria is nontoxic to humans An excess of active hydrogen in the tank This is caused by the corrosion protective action of the anode Hot water odor may be eliminated or reduced in some water heater models by replacing the anode s with one of less active material and then chlorinating the water heater tank and all water lines 33 Contact the local water heater supplier or service agency for further information concerning an Anode Replacement Kit and this chlorination treatment If hot water odor persists after anode replacement and chlorination treatment we can only suggest that chlorination or aeration of the water supply be considered to eliminate the water problem Do not remove the anode rod leaving the tank unprotected By doing so all warranty on the water heater tank is voided AIR IN HOT WATER FAUCETS HYDROGEN GAS Hydrogen gas can be produced in a hot water sy
93. to ignition failure rough starts and or rough operation If a drop of more than 1 5 W 0 37 kPa in supply gas pressure occurs when the Main Burner ignites ensure the supply gas lines and regulator s are properly sized and installed See the requirements for Supply Gas Regulator on page 12 and Gas Piping on page 24 Ensure all requirements and installation instructions are maintained CHECKING VENTING The following steps shall be followed with each appliance connected to the venting system placed in operation while any other appliances connected to the venting system are not in operation 1 Seal any unused openings in the venting system 2 Inspect the venting system for proper size and horizontal pitch as required in the National Fuel Gas Code ANSI Z223 10r the CAN CGA B149 Installation Codes and these instructions Determine that there is no blockage or restriction leakage corrosion and other deficiencies which could cause an unsafe condition 3 So far as is practical close all building doors and windows and all doors between the space in which the water heater s connected to the venting system are located and other spaces of the building Turn on all appliances not connected to the venting system Turn on all exhaust fans such as range hoods and bathroom exhausts so they shall operate at maximum speed Close fireplace dampers Follow the lighting instruction Place the water heater being inspected in operatio
94. to the current edition of the National Fuel Gas Code Schedule 40 Steel or Wrought Iron Pipe is the preferred material for the gas line of this water heater It is imperative to follow the sizing recommendations in the current edition of the National Fuel Gas Code if Corrugated Stainless Steel Tubing CSST is used as the gas line for this water heater The heater is not intended for operation at higher than 14 0 W C natural gas 1 2 pound per square inch gage supply gas pressure Exposure to higher supply pressure may cause damage to the gas control valve which could result in fire or explosion If overpressure has occurred such as through improper testing of gas lines or emergency malfunction of the supply system the gas control valve must be checked for safe operation Make sure that the outside vents on the supply regulators and the safety vent valves are protected against blockage These are parts of the gas supply system not the heater Vent blockage may occur during ice storms TABLE 7 GAS SUPPLY PIPE LENGTHS IN FEET Maximum Equivalent Pipe Length Natural Gas Only Schedule 40 Steel or Wrought Iron Pipe Input rate 180 000 10 200 199000 30 90 200 250000 20 60 200 7500 10 55 200 310 000 10 40 150 366000 30 100 39 00 20 10 20 Te 31 41 52 69 Screwed Fittings 200 200 NININ ojojo ojojo
95. ts of thermal 13 expansion Contact a local plumbing service agency to have a thermal expansion tank installed See Water Line Connections on page 21 and Water Piping Diagrams starting on page 35 TEMPERATURE PRESSURE RELIEF VALVE AWARNING Temperature Pressure Relief Valve must comply with ANSI 221 22 CSA 4 4 and ASME code Properly sized temperature pressure relief valve must be installed in opening provided Can result in overheating and excessive tank pressure Can cause serious injury or death This water heater is provided with a properly rated sized and certified combination Temperature Pressure Relief Valve T amp P valve by the manufacturer The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems ANSI 221 22 CSA 4 4 and the code requirements of ASME If replaced the new T amp P valve must meet the requirements of local codes but not less than a combination Temperature Pressure Relief Valve rated sized and certified as indicated in the above paragraph The new valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater 150 psi 1 035 kPa and a discharge capacity not less than the water heater Btu hr or kW input rate as shown on the water heater s model r
96. u Ft Btuh 3 600 18 1 x 1 000 199 000 Compare with BTL 199 model and rating UNDER NO CIRCUMSTANCES SHOULD THE GAS INPUT EXCEED THE INPUT SHOWN ON THE HEATER S RATING PLATE WATER TEMPERATURE ADJUSTMENT Water temperature over 125 52 can cause severe burns instantly resulting in severe injury or death Children the elderly and the physically or mentally disabled are at highest risk for scald injury A DANGER Feel water before bathing or showering Temperature limiting devices such as mixing valves must be installed when required by codes and to ensure safe temperatures at fixtures The water temperature is controlled by a thermostat Fig 3 which has two sensing elements One sensor is located near the top of the tank and the other is near the center The thermostat is set in the lowest position before the heater leaves the factory The thermostat temperature dial Fig 3 is accessible by removing the control cover The dial is adjustable and may be set for 120 F 49 C to 180 F 82 C water temperature but 120 F 49 C is the recommended starting point It is suggested the dial be placed on the lowest setting which produces an acceptable hot water supply This will always give the most energy efficient operation The temperature control has a 4 fixed differential SEQUENCE OF OPERATION The following information will describe the Sequence of Operation for this water heater 1 AUN
97. water heaters covered in this manual require a 120 VAC 10 single phase 60Hz 15 amp power supply and must also be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 or the Canadian Electrical Code CSA C22 1 WATER TEMPERATURE CONTROL AND MIXING VALVES Water temperature over 125 F 52 can cause severe burns instantly resulting in severe injury or death ADANGER Children the elderly and the physically or mentally disabled are at highest risk for scald injury Feel water before bathing or showering Temperature limiting devices such as mixing valves must be installed when required by codes and to ensure safe temperatures at fixtures Water heated to a temperature which will satisfy clothes washing dish washing and other sanitizing needs can scald and cause permanent injury upon contact Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the water heater s temperature setting by up to 20 F 11 C Some people are more likely to be permanently injured by hot water than others These include the elderly children the infirm and the physically mentally disabled Table 5 shows the approximate time to burn relationship for normal adult skin If anyone using hot water provided by the water heater being installed fits into one of these groups or if there is a local code or

327502 - AO Smith Water Heaters

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