WARNING: 94% CONDENSING TANKLESS For Your Safety! WATER HEATER
WARNING:If the information in theseinstructions is not followedexactly, a fire or explosion mayresult, causing death, personalinjury, or property damage.For Your Safety! D o not store or use gasolineor other flammable vapors andliquids in the vicinity of this orany other appliance. To do somay result in an explosion orfire. Installation and service mustbe performed by a qualifiedinstaller, service agency, or thegas supplier.What to Do IfYou Smell Gas D o not try to light anyappliance. Do not touch any electricalswitch; do not use anyphone in your building. Immediately call your gassupplier from a neighbor’sphone. Follow the gas supplier’sinstructions. If you cannot reach yourgas supplier, call the firedepartment. Do not return to your home untilauthorized by the gas supplieror fire department.Do not destroy manual. Please readcarefully and keep in a safe placefor future reference.WARNING:This water heater is not suitablefor use in manufactured (mobile)homes.AP18161 (02/16)94% CONDENSINGTANKLESSWATER HEATERUSE AND CARE MANUALWith Installation Instructionsfor the InstallerCondensing Direct Vent and Outdoor199,900 Btu/hr, 180,000 Btu/hr and157,000 Btu/hr ModelsDESIGNCERTIFIEDCERTIFIED R
CONTENTSSafetyImportant Safety InformationSafety Precautions . 2–8Product InformationProduct Information . 8Specifications . 9, 10General Descriptions . 11, 12Using Your Water HeaterSetting the Water Temperature .13, 14Caring for Your Water HeaterWater Heater Inspections . 15, 16Care and Cleaning . 17, 18Preventive Maintenance . 19Draining the Water Heater .20–22Freeze Protection . 22Vacation and Extended Shutdown . 23Troubleshooting Chart . 23, 24Service Error Code Chart. 25, 26If You Need ServiceCall for Assistance. 26Installation InstructionsStandards Compliance . 28Choosing a Location.28, 29Product Inspection. 30Water Heater Installation . 30–33Venting. 34–46Water Quality/Supply .47-51Condensate . 51Gas Supply .52-57Electrical Wiring .57-61Remote Control Installation .60-61Insulation Blankets . 62Installation Checklist . 63Piping for Space Heaters . 64Recirculation Control .65-67Activating the Water Heater.68-69Setting the Water Temperature .70-72High-Altitude Dip Switch Adjustments .72-73Water Saving Control Option.74-75Maintenance Notice Option .76-77Parts Replacement .78-79Warranty Information.83-84IMPORTANT SAFETY INFORMATIONREAD THE SAFETY INFORMATIONYour safety and the safety of others are very important.WARNINGS:There are many important safety messages in this manualand on your appliance. Always read and obey all safetymessages.This is the safety alert symbol. Recognize thissymbol as an indication of Important SafetyInformation! This symbol alerts you to potentialhazards that can kill or hurt you and others.All safety messages will follow the safety alert symboland either the word “DANGER,” “WARNING,” “CAUTION,”or “NOTICE.”These words mean:DANGER:An imminently hazardous situation thatwill result in death or serious injury.WARNING:A potentially hazardous situationthat can result in death or serious injury and/or damage toproperty.CAUTION: A potentially hazardous situation thatmay result in minor or moderate injury.NOTICE: Attention is called to observe a specifiedprocedure or maintain a specific condition.2 This water heater is not approved for use inmanufactured (mobile) homes! Improper installation, adjustment, alteration, service,or maintenance can cause death, personal injury, orproperty damage. Follow the instructions in this manual.READ ALL INSTRUCTIONSBEFORE USING.Be sure to read and understand the entire Use and Care Manualbefore attempting to install or operate this water heater. Itmay save you time and money. Pay particular attention to theSafety Instructions. Failure to follow these warnings could resultin death or serious bodily injury. Should you have problemsunderstanding the instructions in this manual, or have anyquestions, STOP and get help from a qualified service technicianor the local gas utility.WARNING:California Proposition 65This product contains chemicals known to the state of Californiato cause cancer, birth defects, or other reproductive harm.
IMPORTANT SAFETY INFORMATIONWater Heater Venting SafetyDANGER:WARNINGS: Gasoline and other flammable liquids, materials,and vapors (including paint thinners, solvents,and adhesives) are extremely dangerous. DO NOThandle, use, or store gasoline or other flammable orcombustible materials anywhere in the vicinity of awater heater or any other appliance. Be sure to readand follow the labels on the water heater, as well as thewarnings printed in this manual. Failure to do so canresult in death, bodily injury, or property damage. Combustible construction refers to adjacent walls andceilings and should not be confused with combustibleor flammable products and materials. Combustiblematerials, such as clothing, cleaning materials, orflammable liquids, should never be stored in the vicinityof this or any gas appliance. Fire or explosion can occurcausing death, personal injury, and/or property damage.See page 29 for clearances to combustible materials. Follow vent manufacturer’s instructions for ventinginstallation, including additional clearances fromcombustibles, to avoid conditions that can lead todeath, personal injury, and/or property damage. Use tankless water heater manufacturer-approvedSchedule 40 PVC (foam core is not permitted at anytime), Schedule 80 PVC, CPVC, ABS, UL 1738-listedCategory III Stainless Steel, or InnoFlue PP. No othervent material is permitted. For Canada, installationsmust follow ULC S636 for exhaust venting. Moisture in the flue gas will condense as it leaves thevent terminal. In cold weather this condensate canfreeze on the exterior wall, under the eaves, and onsurrounding objects. Some discoloration to the exteriorof the building is to be expected. However, improperlocation or installation may result in severe damage tothe structure or exterior finish of the building. For multiple-unit installation, a minimum distancebetween vent terminations must be maintained toprevent recirculation of vent gases. See page 39 forinformation on venting and clearances to multipleterminations.DANGERFLAMMABLESSafety Failure to install and properly vent the water heater tothe outdoors as outlined in the “Venting” section of theInstallation Instructions in this manual will result indeath from fire, explosion, or asphyxiation from carbonmonoxide. NEVER operate this water heater unless it isproperly vented and has the air supply piping properlyinstalled and terminated to the outdoors. Be sure to inspect the vent terminal, the air intake,and the vent system on the water heater for properinstallation at initial start-up and at least annuallythereafter. Refer to the “Care and Cleaning” sectionof this manual for more information regarding ventsystem inspection.Flammable VaporsVapors from flammableliquids will explode andcatch fire causing death orsevere burns.Do not use or store flammableproducts such as gasoline,solvents or adhesives in thesame room or area near thewater heater.Keep flammable products:1. far away from heater,2. in approved containers,3. tightly closed and4. out of children's reach.Installation:Do not install water heaterwhere flammable products willbe stored or used unless themain burner flame is at leastWater heater has a mainburner flame.The main burner flame:1. which can come onat any time and2. will ignite flammablevapors.Vapors:1. cannot be seen,2. are heavier than air,3. go a long way on thefloor and4. can be carried fromother rooms to themain burner flame byair currents.18" above the floor. This willreduce, but not eliminate, therisk of vapors being ignitedby the main burner flame.Read and follow water heater warnings and instructions. Ifowners manual is missing, contact the retailer or manufacturer.CAUTIONS: Ensure that the appliance vent is securely glued andattached to the vent connection on the top of the waterheater. DO NOT USE SCREWS. DO NOT operate without the condensate drain connectedand routed to a proper drain.3
IMPORTANT SAFETY INFORMATIONWater Supply Safety! DANGERS:DANGERCAUTIONS:Safety WATER TEMPERATURE SETTINGS This water heater must only be used!– Safety and energy conservationwith the following water supply systemare factors to be considered whenconditions:selecting the water temperature– With clean, potable water free of corrosivesetting of a water heater’s remotechemicals, sand, dirt, or other contaminants.control. Water temperatures above– With inlet water temperatures above 32 F125 F (52 C) can cause death(0 C), but not exceeding 120 F (49 C).or severe burns from scalding.HOTBe sure to read and follow the– DO NOT reverse the hot and cold waterwarnings outlined on the picturedconnections. The water heater will not operate.label. Even when drained properly, a small There is a hot water scald potentialamount of water will remain in the waterif the water temperature is setBURNheater. In cold weather conditions, thistoo high. Households with smallwater can freeze. If this happens, allowchildren, the disabled, or elderlythe defrost protection on the heaterpersons may require a 120 FWater temperature over 125 F (52 C)at least 30 minutes to melt the frozen(49 C) or lower temperature settingcan cause severe burns instantly orwater or the water heater may not workto prevent contact with “HOT”death from scalds.properly.water.Children, disabled and elderly areat highest risk of being scalded. Before manually operating theSeeinstruction manual beforerelief valve, make certain no oneThe factory setting allows operatingsetting temperature at waterwill be exposed to the dangertemperatures between 100 F (38 C) and 120 Fheater.of the hot water released by(49 C). Temperatures of 85 F (29 C) and up toFeel water before bathing orthe valve. The water may be hot140 F (60 C) can be achieved with the MAINshowering.enough to create a scald hazard.(UMC-117) remote control. Temperatures ofTemperaturelimitingvalvesareThe water should be released into85 F (29 C) can be achieved with the Bathavailable, see manual.a suitable drain to prevent injury or(USC-117 or USC2-117) remote control. Onlyproperty damage.qualified service personnel should perform this Failure to perform the recommended Routine Preventiveadjustment. Only factory-authorized remote control(s) should beMaintenance can harm the proper operation of thisused.water heater, which can cause carbon monoxidedangers, excessive hot water temperatures, and otherpotentially hazardous conditions.NOTICE:!WARNINGS: IMPORTANT: DO NOT apply heat to the HOT or COLDwater connections. If sweat connections are used,sweat tubing to adapter before fitting adapter to thewater connections on heater. Any heat applied to thewater supply fittings will permanently damage theinternal components of the water heater. In case the pipe insulation is not rated for theappropriate weather conditions, install electric heattracing or equivalent to prevent freezing of the pipes.DO NOT insulate or block the drain valve on the hotoutlet fitting. If the pipes are allowed to freeze, thewater heater and the pipes may malfunction or leak dueto freezing water. Failure to drain the water heater as described on page20 can cause serious personal injuries from scaldingand/or damage the water heater.4Time/Temperature Relationship in ScaldsWater Temperature120 F (49 C)125 F (52 C)130 F (54 C)135 F (57 C)140 F (60 C)145 F (63 C)150 F (66 C)155 F (68 C)Time to Producea Serious BurnMore than 5 minutes1 1/2 to 2 minutesAbout 30 secondsAbout 10 secondsLess than 5 secondsLess than 3 secondsAbout 1 1/2 secondsAbout 1 secondTable courtesy of Shriners Burn InstituteTemperature Conversion Chart F/ C85 100 102 104 106 108 110 112 114 116 118 120 125 130 140 F29 38 39 40 41 42 43 44 46 47 48 49 52 54 60 C
IMPORTANT SAFETY INFORMATION Never attempt to convert the water heater from naturalgas to LP or vice versa. The water heater must only usethe fuel type in accordance with listing on data plate—natural gas for natural gas units and LP for LP units.Any other fuel usage will result in death or seriouspersonal injury from fire and/or explosion. This waterheater is not certified for any other fuel type. Both natural gas and propane (LP) have an odorantadded to aid in detecting a gas leak. Some peoplemay not physically be able to smell or recognize thisodorant. If you are unsure or unfamiliar with thesmell of natural gas or LP, ask the gas supplier. Otherconditions, such as “odorant fade,” which causesthe odorant to diminish in intensity, can also hide orcamouflage a gas leak. Water heaters using LP gas are different from naturalgas models. A natural gas water heater will notfunction safely on LP and vice versa. LP must be used with great caution. It is heavier thanair and will collect first in lower areas, making it hardto detect at nose level. Before attempting to light the water heater, make sureto look and smell for gas leaks. Use a soapy solutionto check all gas fittings and connections. Bubbling ata connection indicates a leak that must be corrected.When smelling to detect a gas leak, be sure to also sniffnear the floor. Gas detectors are recommended in LP and naturalgas applications and their installation should bein accordance with the detector manufacturer’srecommendations and/or local laws, rules, regulations,or customs. Combustible materials, such as clothing, solvents,cleaning materials, or flammable liquids, must not beplaced in the vicinity of the water heater. If a gas leak is present or suspected:– DO NOT attempt to find the cause yourself.SafetyNatural Gas and Liquefied Petroleum SafetyDANGERS:WARNINGS: The installation of gas piping must comply with localutility company requirements and/or in the absence oflocal codes, use the latest edition of National Fuel GasCode (NFGC), ANSI Z223.1/NFPA 54, or CAN/CSA B149.1,Natural Gas and Propane Installation Code. If inlet gas pressure is out of allowable range [4.0” w.c.(1.0kPa) – 10.5” w.c. (2.6kPa)] for Natural Gas, or [8.0”w.c. (2.0kPa) – 13.0” w.c. (3.2kPa)] for LP gas, a gaspressure regulator must be installed to maintain theallowable inlet gas pressure. Should overheating occur or the gas supply fail to shutoff, turn off the manual gas control valve to the waterheater.CAUTIONS: DO NOT attempt repair of electrical wiring, gas piping,remote control, burners, vent connectors, or other safetydevices. Refer repairs to qualified service personnel. Turn off the manual gas shut-off valve if the waterheater has been subjected to overheating, fire, flood,physical damage, or if the gas supply fails to shut off. DO NOT turn on the water heater unless the water andgas supplies are completely opened.– Never use an open flame to test for gas leaks. The gas canignite resulting in death, personal injury, or property damage.– Follow the steps listed under “What to Do If You Smell Gas”found on the front cover of this manual.5
IMPORTANT SAFETY INFORMATIONSafetyBefore operating this water heater, be sure to read andfollow the instructions on the label pictured below and allother labels on the water heater, as well as the warningsprinted in this manual.Failure to do so can result in unsafe operation of the waterheater, resulting in death, personal injury, or propertydamage. Should you have any problems reading orfollowing the instructions in this manual, STOP and gethelp from a qualified service technician.FOR YOUR SAFETY READ BEFORE OPERATINGWARNING : If you do not follow these instructions exactly, a fire or explosion may resultcausing property damage, personal injury or loss of life.OPERATING INSTRUCTIONS1.STOP! Read the safety information above on this label.GAS SHUTOFF2.Turn off all electric power to the appliance.VALVE3.Do not attempt to light the burner by hand.4.Turn the Gas Shutoff Valve located on the outside of the unitOPENCLOSEclockwiseto the "OFF" position.5.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow "B" inthe safety information above on this label. If you don't smell gas, go to the next step.6.Turn the Gas Shutoff Valve located on the outside of the unit counterclockwisetothe "ON" position.7.Turn on all electric power to the appliance.8.If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"and call your service technician or gas supplier.TO TURN OFF GAS TO APPLIANCE1.Turn off all electric power to the appliance if service is to be performed.2.Turn the Gas Shutoff Valve located on the outside of the unit clockwiseto the "OFF" position.6
IMPORTANT SAFETY INFORMATIONElectrical SafetyWARNINGS: For your safety, the information in this manual mustbe followed to minimize the risk of fire, explosion, orelectric shock that can result in death, personal injury,and/or property damage. Field wiring connections and electrical grounding mustcomply with local codes or, in the absence of localcodes, with the latest edition of the National ElectricalCode, ANSI/NFPA 70, or in Canada, Canadian ElectricalCode, CAN/CSA C22.1, Part 1.CAUTIONS:SafetyDANGER: Shock Hazard – Make sure the electrical power to thewater heater is off to avoid electric shock that willresult in death or serious personal injury. Label all wires prior to disconnecting for service. Wiringerrors can cause dangerous and improper operation.Verify correct operation after servicing. For your safety, burner inspection and cleaning shouldbe performed only by qualified service personnel. Make certain the power to the water heater is OFFbefore removing the unit cover panel. Exposedelectrical components and moving parts can causepersonal injuries. For your safety, DO NOT attempt repair of electricalwiring, gas piping, remote control, burners, ventconnecto
(49 C). Temperatures of 85 F (29 C) and up to 140 F (60 C) can be achieved with the MAIN (UMC-117) remote control. Temperatures of 85 F (29 C) can be achieved with the Bath (USC-117 or USC2-117) remote control. Only qualified service personnel should perform this
TANKLESS WATER HEATERS TANKLESS CONDENSING HIGH EFFICIENCY SPECIFICATIONS The fully modulating, on-demand, condensing gas fired tankless water heater(s) shall be State model CT-199, having a maximum input rating of 199,000 Btu/h and available in NG or LP. The heater shall have ¾ in. male NPT water and gas connections.
Tankless Water Heater TANKLESS CONDENSING HIGH EFFICIENCY SPECIFICATIONS The fully modulating, on-demand, condensing gas fired tankless water heater(s) shall be A.O. Smith model CT-199, having a maximum input rating of 199,000 Btu/h and available in NG or LP. The heater shall have ¾ in. male NPT water and gas connections. The inlet gas supply
Hotter temperature setting on tankless will cause you to use more cold water, reducing water flow through tankless increasing risk that tankless will not turn ON. Numbers shown in Fig 1 above are for new tankless unit working at optimal performance without allowance for age of
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payback, compared with conventional tankless or tank-type water heaters. Navien's Condensing Tankless also enjoys the highest gallons-per-minute (GPM) when comparing input BTUs. Navien utilizes an ultra-e cient burner, which uses less gas, resulting in a reduction of harmful emissions—better for you, better for the environment.
Tankless water heater shall have a recovery of 257 gallons per hour at a 77 F temperature rise. Tankless water heater shall have Low NOx emissions and is 2012 SCAQMD NOx certifi ed to rule 1146.2. CONSTRUCTION Water heater shall be of gas fi red, tankless design with a modulating power burner and negative pressure gas valve.
TANKLESS WATER HEATER INSTALLATION DIAGRAMS Rheem Water Heating ATTN: Tankless Business Unit 2600 Gunter Park Drive East Montgomery, AL 36109-1413 Office: 334-260-4692. Hot Water . H-1-07 Indoor or Outdoor Tankless Water Heater C-1 MIC-185 Manifold Controller (RTG20126A) C-2 MICS-180 Controller Expansion Card (RTG20126B)
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