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Hand these instructions to customer.Use a heat shield (accessory item part number 9 708 061 400) if the unit is to be installed on a combustible surface. Allow minimum air gap of 10 mm between the flue and the heat shield, (refer figure 2). Check that gas and water valves are open, operate as indicated in Fig. 3 Refit front cover and tighten screws Fig. Open hot water tap fully and adjust gas pressure regulator to 1.13kPa for NG or 2.60kPa for LPG. Call: (08) 8444 7311 Bosch hot water systems are very economical to run and provide high energy efficiency ratings. Adelaide Hot Water TM install, service and repair Bosch hot water appliances and here we have provided customers with a range of Bosch hot water manuals. The manuals cover the Bosch Highflow, Hydropower, Internal Compact, Pilot Ignition, the condensing gas range and Bosch commercial hot water. We can install, service or repair your Bosch hot water in the Adelaide metro and local country area within 24 hours. Give us a call now for our very best prices on Hot Water Adelaide and Bosch hot water systems on 8444 7311. Page Count: 24 Piezo Ignition. Suitable for heating potable water only. Not approved for space heating purposes. AQ 125 BO NG - Natural Gas. AQ 125 BO LP - Liquefied PetroleumIf the information in this manual is notDo not store or use gasoline or other flammableImproper installation, adjustment, alteration, serviceFor assistance orIn the CommonwealthInstallationUponWhatClose gas valve. Do not try to light any appliance. Do not touchIf you cannotImmediately calI your gas supplier from a neighbor'sInstallation and service must be performedIndexFeaturesDimensions and installation clearancesWater connectionsWarningPiezo IgnitionMain burnersIntroductionPilot will light but not stay on when button releasedWater is too hotParts listWhatClose gas valve. Do not try to light any appliance.http://xn--80aamdqpfpr.xn--p1ai/upload_picture/bosch-pfs-65-manual.xml
Do not touch any electricalImmediately call your gas supplier from a neighbor'sIf you cannotInstallation and service must be performedDo not use or store flammableKeep flammable products:Water heater has a mainVapors:Installation. Do not install water heaterRead and follow water heater warnings and instructions. If owners manuals is missing, contact the retailer or manufacturer. Fig.Water temperature over 125 F canChildren, disabled and elderly areSee instruction manual beforeFeel water before bathing orTemperature limiting valves areFig. 1Cold water connection. Burner output proportional to hot water flow demandWater valve material. Sulfid). Stainless. Minimum recommendedAdjustable water flow restrictor to ensure that waterConnections. Safety thermocouple. Dimensions. Automatic. Copper. Easily removable. Easy one person installation. Easy PilotBuilt-in corrosionFlame. IgnitionApprovedWidth. Weight:Gas types. Natural Gas. LP Gas. SafetyFlame failure device (ionization. Pressure relief valve (supplied. Over heat preventionIP X5 (protection. Capacity. Polymer (PPS) (Polypropylene. WaterMaximum output. Maximum input. Efficiency in . Recovery efficiency 80. Min. Output. Gas Requirement. Gas connection. Inlet gas pressure. Propane. Pressure, chapter 3.6.Measuring. Gas. WaterBefore installing the unit, be certain you have theNatural Gas. Identification labels are found on theThe box includes. Mounting. Product. InstallationDo not lose this manual, there is a charge for aPlease complete and return the enclosed productThe appliance and its gas connectionDo not locateGas piping must be sized toNote: manual gasImmediatelyThe AQ125 BO is not approved or designed for:The AQ125 BO shouldIn the United States. TheGeneral rules to followMinimumTable 1 MinimumPleaseFailureDamage or injury. Improper. Loss of warranty.Please contactBBT North America with any questions. Proper locationCarefully select the location of the water heater.http://eatorhours.org/e-bussiness/fckimages/bosch-pho-100-planer-manual.xml
Follow the guidelines below:The heater is equippedElectrical power must be maintainedHeaterThe AQ125. BO is design certifiedKeep the area below the heater free of combustibleMinimumIf the appliance is installed under an overhang, thereFront cover should be removed in order toTo remove front cover. Loosen the two screwsFig. 5Fig. 6Ensure that the flueAfter inspection,Install only on an external wall, as close as possibleIf the unit is to be installed on a combustibleRemoveTable 2 ClearancesVinylVinylFig. 7. Secure heater to wall using enclosedLocate head of screwVent Safety System. The AQ125 BO will shut down if the intake or exhaustBefore connectingIn the United States: The installation must conform withNote: The 125 BO comesThe regulator supplied with theIt is an appliance level regulatorOn appliancesNote: The gas pressuresSee chapter 3.6 for measuringTable 3 AboveMeasure the length of gas supply line and use the tablesIf there areInstall a union when connecting. The minimum diameter. National Fuel Gas Code requires that a sedimentInstall in accordanceNote: Under sizing the gas line may result in diminishedSee chapterWhen connections are made, check for gas leaks at allA combustibleCopper tubing is prohibited for use with Natural Gas in the CommonwealthFor multipleNominal. Iron. Length. Pipe. Internal. Size. DiameterIron Pipe, FeetTubeDiameter. The greaterPressure) (Based on a Pressure Drop of 0.5 Inch Water Column). HydraulicNominal. Diameter. The greaterLength of FlexbleCorrugatedSta nlessSteel Tubng (CSST), Feet. Iron pipe. BlackLength. Tube. Iron PipeIr 567Capacity. PetroleumSemi-RigidUndiluted. Water. Tubing. InletNationalDrop of 0.5 Inch Water. Fuel Gas Code. AllowanceLengthFeetPressure).Liquefied. ColumnMeasuring. ConnectingShut off gas. Remove front cover and locate inlet gas pressureLoosen screw from test point on the left side of gasBlow out orFull port valves should be installed on both the coldConnecting.http://www.bouwdata.net/evenement/3jh4e-manual
StaticA listed pressure relief valve supplied with the heaterNo valve is. Turn gas supply back on. Operate all other gas appliancesRecord static gas pressureOperating pressure test. Run high hot water flow rate. Set flow control knob fully clockwise. Set slide control to the right. Record operatingThe location of the PRV must be readily accessible forPRV, a suitable fitting connectedSupport all piping.See Gas Line Sizing under chapter 3.5.Fi9.9. Plumbing. ValveConnectionsPressure. ReliefNever sweat any rigidKeep water inlet and outletIt is recommendedThe freeze protection provided with the heater will notIf the cold and hot connectionsBe certain thereThe 125 BO requires an electrical power supply from aA means for switching off the 120VAC power supplyA. This appliance employs a piezo-igniter to light theB. What to do if you smell gas.Do not touch any electricThe heater will now fire at minimum power whenImmediately call your gas supplier from a neighborsIf you cannotNote: If main burner should fail to ignite, make sure pilotNote: The 125BOC. Use only your hand to push in the gas controlForced or attemptedD. Do not use this appliance if any part has been underNote. OnThis step may haveTo turn off appliance. SettingThe 125 BO has a gas control that modulates burnerIts purpose is to ensure thatTemperatureThe temperature adjustment knob on the front bottom ofSee table 4 for details. Degree rise. ActivationMax flow rateAs the temperature adjustment knob is turned counterclockwise,Fig. 11. Gas control slide button. The gas control slide button adjusts temperature byAs the slide is adjusted to the left, the outputThe hottest position is the threeThe 125 BO requires periodicEvery yearEvery 3 to 5 yearsWaterShut off the installer supplied cold water supply valve.http://www.compass-it.com/images/bosch-home-security-manual.pdf
Disconnect water pipe going to the back of the waterReplace if the filter is at allIf present, rebuild the waterLubricatingA more detailed instructionShut off all water to theLoosen two set screws at the base of the gas valve andSeparate the two halves byFig 13, pos. 23). Inspect and clean the venturi (see FigRebuildingMain burnersThe water valve is the main control that tells the heater. InspectingDisconnect the flame sensor rod cable and the igniterRemove two screws holding pilot assembly in place. Loosen compressionNote: The orifice sits on topPolish flameIfDo notThe pilot should burn with a clean sharp blue flame. TheCleaningPilotThe main burner flames should be blue, with a moreYellow flamesTo clean theInspect the draft hood and heat exchanger fins for signsThe 125 BO, when operated at lower temperaturesIfThe heating coilsConsult your service person. Several parts within the water valve should be replacedThe expected reading is 24mVDC or greater. Many of the questionsVisit our webFor best results, perform each stepThe suggested solutionsSee chapterIf the container fills in 30If the knob is fullHave licensed gas technicianSeeSee chapterWater running is a signConsult a local plumber orBurners do not ignite with waterPilot will not lightSeeElectromagnet is located on the right side of the gas valveThe. Electromagnet connection is a large aluminum 17mmTighten bothWater running is a signConsult a local plumber orSeeFor installation onIf it happensNG is a natural gas unit and LP is for liquid propane.Use the slide control toFor installation onWater running is a signConsult a local plumber orHeat exchanger. Pilot assembly. Burner manifold gas pressure test nipple. Main gas burner. Pilot gas tubingGas control slide. Electronic control boxComponentsDiagramPacking. The packingComponents. Many parts in the heater can be fully recycled in the endSaving water resources:Repair any leaking tap.
For increased safety shut off the appliance fromAt below freezing temperatures, disconnect theTo prevent any freeze damage, introduce shortYear. Limited. Warranty. General. AquastarManufacturerBBT North America (BBTNA) will furnish a replacementTheThis warranty will be valid onlyNote:How to Make a Claim. Any claim for warranty parts should be made to yourIf BBTNA, pleaseThe Heat Exchanger. If the heat exchanger fails within twelve (12) years afterHowever, if theWaitsfield, VT 05673. Phone: 800-642-3111Exceptions. This warranty will not apply:All Other Parts. If any other part fails within two (2) years after originalShipping costs. In most cases, the dealer or distributor will be able toBBTNA. However, all replacements are made subject toMiscellaneous. No one is authorized to make any other warranties onSome states doThis warranty gives specific legal rights. You may alsoIn addition to supplying the replacement part(s). BBTNA will provide ground service delivery for theseService. Labor Costs. This warrantyAdditionally,Serial NumberBuilding. Water. Average. Winter Temperature. Average. Summer Temperature. InstallingStatic. Pressure. Operating. Range if on Well system. Company. Installer name. Address. Phone. InstallationReplacement. Parts availableBosch Water HeatingWaitsfield,Fax (802)RecycledWaitsfield, VT all rights reservedFile Type Extension: pdf. PDF Version: 1.2. Linearized: No. Page Count: 24. Page Layout: SinglePage. Page Mode: UseNone. Producer: Goby Monitor Application version 4, 0, 0, 13. Create Date: Mon Jul 21 00:53:36 2008. Author. Title. Subject. Volts Amps Watts for water heater Bosch tankless water heater CleanGet up your wallet Phone Support: Gas Products Technical Support: 800-642-3111 Electric Product Technical Support: 866-330-2729 Check rates for parts, service, and yearly maintenance before countingDeliming will not restore full efficiency.Only takes 45 minutes.
Assemble parts for flushing and do itArern't you glad you squeezed that tankless in the closet, over theBecause they don't. Faucet must fill quart in 20 seconds and gallon in 80 seconds Crossover and Low water pressure can reduce flowPromise of unlimited hot water not consistant with water conservation. We have no relationship with advertisers, products, or services discussed at this website. We also discuss the conditions, maintenance, and factors that affect how long a water heater can be expected to last. Alan Carson is a past president of ASHI, the American Society of Home Inspectors. Carson Dunlop Associates' provides extensive home inspection education and report writing material. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume. Special Offer: For a 10 discount on any number of copies of the Home Reference Book purchased as a single order. InspectAPedia.com editor Daniel Friedman is a contributing author. Or choose the The HOME REFERENCE eBook for PCs, Macs, Kindle, iPad, iPhone, or Android Smart Phones. Special Offer: For a 5 discount on any number of copies of the Home Reference eBook purchased as a single order. InspectAPedia.com editor Daniel Friedman is a contributing author.
Do not store or use gasoline or other flammable,Warning: Carefully plan where youWarning: Exhaust gas must be ventedWarning: Place the heater in a locationWarning: Field wiring connections andCanadian Electrical Code, CSA C22.1. Part 1. Warning: Shock hazard line voltage isWhat to do if you smell gasFig. 1Warning: The heater must beCaution. Any changes or modifications not expresslyFig. 2Appliance detailsMaximum input. Parts. Efficiency in Recovery efficiency 86.5Min. OutputTemperature Control. Safety. Gas Requirement. Gas connection (inches) - ?”. Inlet gas pressure under operation (with a high hot. High Quality Materials for Long Working LifeFeaturesGas pressures. LPG will result in insufficient degree rise to the hotAccessoriesBOSCH is constantly improving itsFig. 3. Gas pressure measuring point. VentingSee chapter 2.9 for Venting on page 9. Water. Capacity. Sulfid). Maximum outputPSI (2.07 bar)CombustionDimensions. Gas types. Natural Gas. LP Gas. Converting the gas type can only be done by a certifiedCEC for conversion instructions. This heater is packed securely.Do not lose this manual. Please complete and returnBefore installing the unit, be certain you have theNatural Gas. Identification labels are found on theTo remove front cover. VoltageAmperage. IDLE - 40 mA. Operation - ? 2,5 A. Noise. Plastic decalsSafety devices. Water resistant. IP X4 (protection against water drops). Fig. 4Remove front coverFig. 5. Dimensions. Cover. LCD display. Temperature buttons. Fig. 6. Minimum clearances. Model GWH-635-ESB 1. You should follow these instructions when youIn Canada: The Installation should conform withB 2. Carefully plan where you install the heater. CorrectB 3. When the unit is installed indoors and ROOM. SEALED (twin pipe) it is permitted to be located inSee chapter 2.9. If the unit willB 4. You must vent your heater. See section onThe appliance and its gas connection must be leakB 6. Keep water heater area clear and free fromDo not locateB 7.
Correct gas pressure is critical for the optimumGas piping must be sized toB 8. Should overheating occur or the gas supply fail toNote: manual gasB 9. Do not use this appliance if any part has beenCarefully select the location of the water heater. ForFollow the guidelines below. B 1. Locate the heater where venting, gas andB 2. It is strongly recommended that the heater beB 3. The hot water lines should be kept short to saveWarning: The water in this waterTo prevent any freeze damage,Warning. FlammableThe applianceThe GWH-635-ES is design certified for installation onSee also Fig. 6. A. Top 12 inches (306 mm). B. Front 4 inches (102 mm). C. 0 inches. D. Sides 4 inches (102 mm). E. Bottom 12 inches (306 mm). Clearances from any exhaust vent pipe are dependentSingle wall stainless steelWarning: before starting installation. B check that there are no loose partsFig. 7. Mounting the heater. B ensure that gas pipe, gas valve, mixer,Front cover should be removed (seeThe GWH-635-ES is design certified for mounting on aDo not install this appliance on a carpeted wall or overThe heater must be mounted on a wall usingIf the mounting bracket is unable to line up on two wallThe heater should be kept levelExpansion and contraction of piping due to changingBefore installing the unit, be certain you have theNatural Gas. Identification labels are found on theThe GWH-635-ES is a sealed water heater and it isObserve all local building codes when penetrating aThe heater has the ability to operate withoutObserve the followingThe confined space must be provided with twoOr the confined space must be provided with oneThis openingLouvers, grills and screens have a blocking effect. If theRefer to the National Fuel. Gas Code for complete information. In buildings of tightWarning: Do not reduce the ventNOTE: This appliance's exhaust must be ventedThe heater shall notCaution: The vent system must beMonoxide poisoning could result.
CECEstablish vent clearances that comply with the ventIn all cases follow localVenting. Options. ExhaustCombustionCombustionVent pipeVent pipeRoomOpenSeeSeeExhaust vent is always fan assisted. Installation of exhaust vent and combustion air piping may be run vertically or horizontallyNOTE: clearance distances areNever reduce pipe diameter. Table 2The appliance should be located as close to the pointThe maximum vent length isSubtract 2?Any vent section greater thanNote: The stainless steel exhaust vent pipe should notIf the vent system passes throughThe distance toNote: Type-B vent should never be used as theNote: reduce 2? ft for each elbow used after the firstVent Safety System. The GWH-635-ES will shut down if inadequate exhaustAttaching the exhaust and air inlet connectionMinimum exhaust vent size and length. Fig. 10. Fig. 8. Maximum vent lengths. Fig. 11. B Attach the flue gas exhaust accessory (8 705 504Fig. 9B Attach the combustion air inlet accessory (8 705NOTE: The appliance has theInstalling this water heater as a room sealed (TWIN. PIPE SYSTEM) is the recommended method. Contact. CEC or dealer for available vent termination kits andExhaust venting shall be done with 3”Room sealed installation (TWIN PIPE SYSTEM). The exhaust vent pipe and combustion airMaximum length for each individual pipe isOpen combustion installation (SINGLE PIPEFig. 12. Exhaust vent pipe: ? 26 ft (8 m). Combustion air pipe: ? 26 ft (8 m). Fig. 15. Fig. 13. Note: reduce 2? ft for each elbow used after the firstConnecting a one piece 90 degree elbow pipe to theNote: reduce 2? ft for each elbow used after the firstRecommended exhaust vent terminator position. Fig. 16. Ref. Description. Minimum distance. Directly below an opening; operable windows, doors and any nonmechanical fresh air openingsBelow a gutter, sanitary pipework or eavesBelow a gutter, sanitary pipework or eaves, protected by metalFrom any internal cornerAbove groundAbove a paved sidewalk or driveway.
From an opposing wall or structure facing the terminationFrom any other building opening, gas utility meter, service regulatorFrom a terminator facing a terminatorVertically between two exhaust vent terminators on the same wallHorizontally between two exhaust vent terminators on the same wallHorizontally from combustion air inlet of 635-ESVertically above combustion air inlet of 635-ES. From the combustion air inlet of any appliance or below theFrom any external cornerHorizontally from an opening; operable windows, doors and anyVertically from a wall, roof slope, or obstruction (venting through aTable 3Supporting the exhaust vent system and the useExternal condensate traps. B A condensate trap must be used in any sidewallB A condensate trap must be used for any verticalB When installing the condensate tube at the bottom ofThis tube must beFig. 18 Above the roof clearance requirements fromThe venting materials and accessoriesFig. 17 Horizontal side wall venting installationFig. 19 Vertical venting installation (combustion airBefore connecting the gas supply, check the ratingIn the United States: The installation must conform withIn Canada: The Installation should conform with CGAApplicable Plumbing Code for a maximum draw ofUse the charts in Fig. 22 toNote: It is important that if any flexible gas line is used,Fig. 20 Vertical venting installation - Masonry. Chimney (combustion air piping not beingInlet gas particle screen. Gas piping. Fig. 21. B Install a manual gas shut off valve, on the gas supplyB The use of a union when connecting gas pipe to theB Flexible gas line connectors are not recommendedMaximum Capacity of pipe in Cubic Feet of Gas per. Hour for Gas Pressure of 0.5 Psig or less and a. Follow boxed numbers for piping just one GWH635-ES (example: ?” B.I. Natural Gas pipe for 20 ftNominal. Iron. Length of Black Iron Pipe, Feet. Pipe. Internal. Size. DiameterHour of Undiluted Petroleum Gases (at 11 inches. Water Column Inlet Pressure) (Based on a Pressure.
Drop of 0.5 Inch Water Column). Nominal. Black Iron Pipe. Iron Pipe. Length of Pipe, Feet. Size,Length of Tubing, Feet. Outside. Diameter. InchColumn)B It is strongly recommended that the Natural Gas pipeBlack Iron pipe up to 20 feet (6.1m) and 1” Black IronNOT recommended, but if used, then oversize theB It is strongly recommended that the LP Gas pipe beWarning: The heater must beSee Gas Connections,Fig. 23 Gas pressure measuring (left tapping)Altitude. Liquid. Propane:Burner output at altitudes greater than 4000 ft (1219Follow instruction below. High altitude adjustment. B Disconnect power supply to heater. The water heater must not be piped with gas supplyWhen connections are made, check for gas leaks at allB Remove front cover of heater. B Remove control box auxiliary cover (Fig. 24, pos. 4). Danger: If you have a leak, shut off theNever test for gasTo measure and verify if adequate gas pressure is beingFig. 24B Remove the 5 screws on the front retaining bar (see. Fig. 24, pos. 1 and 2) being careful not to damageB Remove the two electrical strip connectors inside theRubberOnce auxiliary cover isOnce off, the wiringFig. 25 Electrical strip connectors. B At the ignition electrodes, pull off the 2 yellow igniterHigh altitude adjustmentFig. 26 Control board adjustment for high altitudesFor altitudes greater than 8000 ft (2438 m),When facing the heater, the ?” cold water inlet is on theB While holding the board in one hand or resting it onTo make theB Remove the jumper from the JP3 pin (see Fig. 26). B Line up the two jumper sockets with the two JP3B Insert the jumper.
B Replace the front cover to the control board and reinsert into heater and then proceed with previousBe sure that the rubberB The use of a union when connecting both waterAlthough water piping throughout the building may bePlastics or other PEXKeep water inletIf the cold and hot connections to the heater areBe certain thereBlow out orFull port valves should be installed on both the coldConnecting the pressure relief valve (PRV). A listed pressure relief valve supplied with the heaterNo valve isThe discharge line must be aThe location of the PRV must be readily accessible forPRV, a suitable fitting connected to an extension on aSupport all piping. Fig. 28 Plumbing Connections and Pressure Relief. ValveWarning. ForWarning: This heater must beNational Electrical Code. NFPA 70. In. Canada, all electrical wiring to theCode, CSA C22.1 Part 1. Do not relyThe GWH-635-ES requires an electrical power supplyA means for switching off the 120VAC power supplyThe heater is wired as shown in the wiring diagramB Before proceeding with the operation of the heaterB Turn off power supply to heater. B Open the cold water inlet supply to the heater fully. B Open a hot water faucet to permit the water to fill theB Close the hot water faucet after the water flows freelyThe water heater is nowNOTE: when the heater is turned on itsAdditionallyWarning: If you do not follow theseA. This appliance is equipped with electronic ignition forWhen turning the heater on,B Do not touch any electric switch; do not use anyB Immediately call your gas supplier from a neighborsB If you cannot reach your gas supplier, call the fireNever use tools. Follow these instructions exactly. IfAttempted forceful repairD. Do not use this appliance if any part has been underB 1. STOP! Read the previous safety information. OFF switch to position (0). Wait five (5) minutes toIf you do not smellB 3. This appliance is equipped with electronic ignitionWhen turning theB 5. Open a hot water tap. B 6.
The burners will remain on until the hot water tapNOTE: on a first time initialWhen the heater is in operation you will hear its powerUpon turning off the hotOperation instructions. Fig. 29. Program Key. Increasing temperature selector. Decreasing temperature selector. LCD displayPower. On. B To start the appliance switch the button to positionFig. 31. If the outlet water temperature is set too high, the heaterIn the event of any temperature instability with the useAdditionally the temperatureFig. 30. Off. B To shut down the appliance switch the button toTo select water temperature outlet:Setting the water temperature. The desired temperature of the hot water can beThe GWH-635-ES has an electronically controlled gasInlet (?F) 40. Inlet (?F) 50. Inlet (?F) 60. Inlet (?F) 70Inlet (?C) 4. Inlet (?C) 10. Inlet (?C) 16. Inlet (?C) 21Fig. 35. Fig. 33 Remote control. AfterRemote control registration. B Press and holdB press reset button in order to make the applianceLCD shows one number and one rotating digit. The number represents the remote control which is toThe rotating digit shows that the electronics isB Hold remote control in front of the control panel onFig. 36 Reset button. If the problem persists, contact your installer.New remote control is programmed.Program button. Each remote control program button canProgramming “Program” function. Programming actions are similar for both controlsOperation. B When a hot water tap is opened, main burner ignitesB Press “Program” key (Fig. 29, pos. 3) for 3 seconds. Fig. 34. B LCD blinks until selected temperature is reached.See the error code on LCD andReset button. Temperature on LCD starts blinking, showing currentB Press buttonsB Hold “Program” button for 3 seconds to saveScale build upWhen LCD stops blinking. Temperature is saved onUsing “Program” function. In order to select memorized temperature. Introduction. B Press “Program” key.
LCD shows pre-memorized temperature, which is nowThis condition is only valid for appliances with moreFig. 38 Locked condition. Whenever LCD showsAppliance will be automatically unlocked after closingMaintenance and service. Warning: Always turn off the electricalThe unit should be checked once a year by a gasTo remove front cover. B Remove plastic decals on front panel. B Undo two Philips head screws located behindB Lift front cover panel upward and remove. Systems and parts that should be checked atReference diagrams on pages 30 and 31.Troubleshooting. The GWH-635-ES burner is activated by a water flowThese water flow related problems can cause theProblems stated below in upper case and in bold faceAny failures that result in a displayed error code areA Functional Scheme of the. GWH-635-ES is detailed on page 29. If there is aMake sure cold water inlet connection is plumbed toRemove water inlet filter screen and clean. TheThe heater activates when there is sufficient water. If there is a crossover in theA plumbing crossoverSee specifications in chapter 2.10 - 2.12. The. GWH-635-ES requires adequate gas pressure toGWH-635-ES will effectively reach the selectedTest by following 4th bullet under BURNERS DOThe GWH-635-ES will effectively support two 2.02.5 gpm shower heads simultaneously or multipleIn such cases whenIf the outlet water temperature is set too high, theAdjustments should be made to the hottest setting inFor installation on a private well system with the useWatts brand 25AUB?” or N35B-?” pressure relief valves or equivalentSee specifications in chapter 2.10 - 2.12. The. GWH-635-ES requires adequate gas pressure toIts motorized water valveProper gas pressure willRemove water inlet filter screen and clean. TheDisplay. Cause. SolutionCheck gas pressure. Check that gas is not diluted with air, as a. Check if vent terminal is blocked (speciallyCheck water valve and flow sensor.Table 5Electrical diagram. Fig. 39 Electrical schemeIonization sensor.