Bosch Greentherm T9900 SE 160 Installation And Operating Instructions Manual Download Page 1

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6 720 813 635 (2019/03) US

Installation and Operating Instructions

INDOOR RESIDENTIAL TANKLESS WATER HEATERS

Greentherm T9900 SE 160/199 | i 199

WARNING!

Improper installation, adjustment, alteration, service or maintenance can cause
injury or property damage. Refer to this manual. For assistance or additional infor-
mation consult a qualified installer, service agency or the gas supplier.

NOTICE

Upon completion of the installation, these instructions should be handed to the user
of the appliance for future reference.

160 000/199 000 Btu- Natural Gas | 160 000/199 000 Btu - Liquefied Petroleum
(LP) Gas

Summary of Contents for Greentherm T9900 SE 160

Page 1: ...ation service or maintenance can cause injury or property damage Refer to this manual For assistance or additional infor mation consult a qualified installer service agency or the gas supplier NOTICE Uponcompletionoftheinstallation theseinstructionsshouldbehandedtotheuser of the appliance for future reference 160 000 199 000 Btu Natural Gas 160 000 199 000 Btu Liquefied Petroleum LP Gas ...

Page 2: ...ur water heater 45 6 2 Power 45 6 3 Error code reset 45 6 4 Temperature selection 45 6 4 1 Programming the default setpoint temperature 46 6 5 Information Adjustments menu 47 6 5 1 P4 Information 47 6 5 2 SA Settings 47 6 5 3 AU Technical Settings 50 6 5 4 P9 Purge 50 6 6 Service menu AU Technical Settings 51 6 7 Water valves calibration 52 6 8 Gas type 52 6 9 Wi Fi connection 54 7 Maintenance and...

Page 3: ...tantinformationwherethereis no risk to people or property Additional symbols Table 1 1 2 Safety instructions H DANGER Before installation Readallinstructionsbeforeinstalling Perform the steps in the indicated sequence Have the water heater inspected by a trained service technician at least once every year Failure to comply with these instructions can result in severe possibly fatal personal injury...

Page 4: ...ng callthegas utility company and a trained and certified installer H DANGER If you smell flue gas inside the house Switch off the appliance Open windows and doors Inform the certified installer who installed the appliance to change appliance installation location H DANGER Risk of poisoning Insufficient ventilation may cause toxic flue gas to escape Never close off or reduce the size of the air in...

Page 5: ...plain to the customer how the appliance works and how to operate it Informthecustomerthathe shemust not carry out any alterations or repairs H DANGER Risk of electric shock Ensure that only an authorized contractor performs electrical work Before performing electrical work disconnect the power and secure the unit against unintentional reconnection Ensure the system has been disconnected from the p...

Page 6: ...d pressure Installation of a T P safety valve is required H WARNING Electrical safety To protect against corrosion and ensure compliance with the rules for electrical safety observe the following points Use metal fittings for potable water heating systems with plastic piping Useonlyoriginalaccessoriesfromthe manufacturer When installation of the water heater is complete inspect and confirm proper ...

Page 7: ...e personal injury or death WARNING Damage to the appliance from over pressure The heater must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0 5 psi NOTICE Theapplianceshouldbelocatedinanareawhereleakageof the heater or connections will not result in damage to the area adjacent to the appliance or to lower floors...

Page 8: ... treatment shall not be introduced into the potable water used for space heating WARNING Personal Injury from toxic chemicals A water heater which will be used to supply potable water shall not be connected to any heating system or component s previously used with a nonpotable water heating appliance 2 Safety information Fig 1 The chart below shows the relationship between water temperature and ti...

Page 9: ...re touch control Reset function Long press 3 sec the ON OFF button Programmable default temperature Failure codes with message display for easy diagnostics and repair Real time diagnostics for troubleshooting informational purposes Built in freeze prevention Recirculation pump Integrated siphon to limit condensate freezing in external condensate pipes The freeze prevention kit is designed to provi...

Page 10: ...ange F C 100 1205 38 49 100 1205 38 49 Default temperature F C 120 49 120 49 Stability6 F C 2 1 2 1 Gas Requirement Gas connection inches Peak load inlet gas pressure7 Propane water column 8 13 8 13 Natural Gas water column 3 5 10 5 3 5 10 5 To assure maximum heat input at maximum vent length minimum gas pressure should be 5 W C 199kBtu and 4 W C 160kBtu For more information see section 4 6 3 Wate...

Page 11: ...the unit to higher temperatures and then mixing down using cold water after the unit 2 Input rating is based on sea level operation and need not be changed for operation up to 2000 ft 610 m elevation For operation at elevations above 2000 ft 610 m input rating is automatically reduced at the rate of 4 percent for each 1000 ft 305 m above sea level 3 When converted to LPG the minimum input is 17 00...

Page 12: ...ual can be downloaded at www boschheatingandcooling com The Greentherm T9900 SE i are not approved or designed for Manufactured mobile homes boats or any mobile installation Modular homes are acceptable for installation Use above 8000 ft A S L altitude Applications where inlet water temperature is higher than 140 F 60 C for Residential appliances In these applications a 3 way valve or thermostatic...

Page 13: ... fatal accidents can occur such as carbon monoxide poisoning or fire 3 Whentheunitisinstalledindoorswith DIRECT VENT exhaust vent and air intake connected to the outside it is permittedtobelocatedinbathrooms bedrooms and occupied rooms that are normally kept closed See chapter 4 6 page 18 If the unit will be installed indoors and use indoor combustion air NON DIRECT VENT the place where you instal...

Page 14: ... Check with your local gas supplier andseethesectiononconnectingthe gas supply See chapter 4 8 page 33 8 Should overheating occur or the gas supply fail to shut off turn off the gas supply at the manual gas shut off valve on the gas line Note manual gas shutoff valve is not supplied with the heater but must be field installed 9 Do not use this appliance if any part has been underwater Immediately ...

Page 15: ...Appliance details 15 Greentherm T9900 SE i 6 720 813 635 2019 03 3 5 Dimensions and minimum installation clearances Fig 5 Dimensions ...

Page 16: ...ces Common installation practice is to first determine the path and method of venting then design the piping layout 4 3 Proper location for installing your heater Carefullyselectthelocationofthewaterheater Foryoursafety and for proper heater operation you must provide combustion air to the heater and properly vent the exhaust gases Follow the guidelines below 1 Locate the heater where venting gas ...

Page 17: ...no loose or damaged parts inside the appliance Settheheatergastypeaccordingtothegassuppliedtothe unit Frontcovershouldberemoved seeinstructionsonpage 12 in order to inspect components visually WARNING Do not install this appliance on a carpeted wall The heater must be mounted on a wall using appropriate anchoring materials NOTICE Risk of appliance freezing Inareaswhereoutsidetemperatureisroutinely...

Page 18: ... Failuretoventtheexhaustgasestotheoutside seetable 5 for proper material may result in dangerous flue gases filling the structure in which it is installed NOTICE Installations resulting in negative pressure back draft require sealed combustion twin pipe concentric Damage caused from back draft ie freezing are not covered by warranty NOTICE Appliance malfunction Protect the exhaust and inlet from l...

Page 19: ...t use cellular foam core pipe for exhaust This material is approved for intake only The vent connection for the appliance is secured with a clamp on the appliance exhaust adapter All other vent connections must be glued except PP and flex PP Slide the vent pipe into the exhaust adapter The exhaust pipe must be properly supported and must be pitched a minimum of a inch per foot back to the applianc...

Page 20: ... 4 SCH 40 Solid Core PVC CPVC T terminal w vent screen h h 10 2 3 and 4 SCH40 Solid Core PVC CPVC straight pipe h h 1 IPEX 196005 PVC Concentric termination 2 by 16 long h h Exhaust 1 5 Intake 20 IPEX 196105 PVC Concentric termination 2 by 28 long h h Exhaust 2 5 Intake 20 IPEX 196125 PVC Concentric Termination Kit 2 by 40 long h h Exhaust 3 Intake 20 IPEX 196006 197009 PVC CPVC Concentric Termina...

Page 21: ...t h h Exhaust 2 Intake 40 Royal Plumbing Solutions 52SWVKGVS6502 52SWVKGVS6503 2 GVS 65 Side Wall Vent Termination Kit 3 GVS 65 Side Wall Vent Termination Kit h Exhaust 0 Intake 5 1 Close sweep fittings are not accepted Manufacturer Manufacturer part number Product description Diagram Horizontal Vertical Equivalent Lengths Ft Duravent M G 810009685 810009713 810009745 2 PP Twin pipe termination 3 ...

Page 22: ...ntro therm ICRT3539 3 x 5 Concentric Roof Termination h Exhaust 10 Intake 10 Centro therm ICTCR24 2 x 4 60 100mm Exhaust Intake Centro therm ICCT3503 3 x 5 80 125mm Exhaust Intake Centro therm ICWT242 2 x 4 Concentric Wall Termination h Exhaust 4 Intake 4 Centro therm ICWT352 3 x 5 Concentric Wall Termination h Exhaust 6 Intake 6 Ecco Manu facturing 190288 2 PP Concentric Terminations Horizontal W...

Page 23: ...4 WC for 160kBTU models In cases of gas pressure below5 WCforthe199kBTU 4 WCforthe160kBTUmodels the maximum heat input is reduced Thevaluesofmaximumfluelengthintableare 8beforeany deductions for elbows or terminations Table 8 Maximum Allowable Exhaust and Air intake Lengths Improper gas pressure or vent length may result in undesired symptoms or errors such as noisy burner C1 C2 CF EA EC The vent ...

Page 24: ...unventilated soffit F Clearance to outside corner G Clearance to inside corner H Clearance to each side of center line extended above meter regulator assembly 36 in 91cm within a height 15 ft 4 6m above the meter regulator assembly I Clearance to service regulator vent outlet 36 in 91cm J Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other appliance 36 ...

Page 25: ...installation codes and the requirements of the gas supplier 3 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings 4 Permitted only if veranda porch deck or balcony is fully open on a minimum of two sides beneath the floor ...

Page 26: ...earance to outside corner G Clearance to inside corner H Clearance to each side of center line extended above meter regulator assembly 36 in 91cm within a height 15 ft 4 6m above the meter regulator assembly I Clearance to service regulator vent outlet 36 in 91cm J Clearance to nonmechanical air supply inlet to building or the combustion air inlet to any other appliance 36 in 91cm 48 in 1 2m below...

Page 27: ...installation codes and the requirements of the gas supplier 3 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings 4 Permitted only if veranda porch deck or balcony is fully open on a minimum of two sides beneath the floor ...

Page 28: ...awater leak and is not covered by the product s warranty In the event ofnegativeairpressurecausingbackdraftingcontactBoschfor information Fig 12 Horizontal venting system concentric vent 1 Exhaust 2 Air intake 3 Concentric Vent kit 4 Exhaust pipe 5 Air Intake pipe LA Minimum 1 Fig 13 Vertical venting system 1 Exhaust 2 Intake A 12inches 305mm 18in forCanada abovemaximum snow level or at least 24 i...

Page 29: ...whichever is greater NOTICE Place pipe supports every 5 feet 1525mm of horizontal and vertical run beginning with support near water heater Periodiccleaningoftheventterminalandairintakescreens is mandatory Avoid locating vent terminals near equipment vegetation plants or building features which can be subject to degradation from exhaust gases Fig 16 Horizontal venting system sealed combustion 1 In...

Page 30: ...g the condensate water drain NOTICE Risk of condensate pipe freezing Donotinstallcondensatedraintubinginareaswhereitmay freeze Appliance condensate drain installation The appliance comes equipped with an internal condensate drain and siphon This drains condensation formed in the secondary heat exchanger Piping must be installed under the condensate drain outlet on the water heater and piped for di...

Page 31: ... internal flapper must be 100 closed when the water heater is not running Refer to fig 23 for preferred installation positions in the vent system Installation considerations Install the damper per the supplied manufacturer s instructions The damper is only to be used in the exhaust vent piping Ensuredirectionalarrowondamperlabelfacesinthesame direction as exhaust flow If installed horizontally the...

Page 32: ...iltrationairis normally adequate to provide air for combustion Appliances located in confined spaces The confined space must be provided with two permanent openings one commencing within 12 inches 304 8mm of the top and one commencing within 12 inches 304 8mm of the bottom of the enclosure Each opening must have a minimum free area of one square inch per 1000 BTU hr 292 81 Watts if all air is take...

Page 33: ... CONNECTIONS Install a manual gas shut off valve on the gas supply line within easy reach of the appliance Install a union when connecting the gas supply Gas connection to the water heater is NPT See chapter 4 8 1 for the minimum internal pipe diameter required Undersized flexible appliance connector is not permitted National Fuel Gas Code requires that a sediment trap drip leg be installed on gas...

Page 34: ...f the gas to determine the BTU hr capacity Use 1 000 BTU cubic foot for rough estimations Table 11 Maximum pipe capacity in cubic feet of Natural Gas per hour for gas pressures of 2 0 psig 55 WC or 138 mbar and a pressure drop of 0 5 W C 1 25 mbar based on 0 60 specific gravity gas Table 12 Maximum pipe capacity in cubic feet of Natural Gas per hour for gas pressures of 2 0 psig 55 WC or 138 mbar ...

Page 35: ...g Table 16 Maximum capacity in thousands of BTU of the gas supply pipe per hour of Undiluted LP Gas at 11 W C 0 4 psig or 27 4 mbar based on a pressure drop of 0 5 W C 1 25 mbar Source National Fuel Gas Code NFPA 54 ANSI Z223 1 No Additional Allowance is necessary for an ordinary number of fittings Pipe Sizing Between Single or Second Stage Low Pressure Regulator and Appliance Nominal Iron Pipe in...

Page 36: ...eptable Connecting the pressure relief valve PRV A pressure relief valve is included in the box and must be installed at the time of installation No valve is to be placed between the PRV and the heater No reducing coupling or other restrictionmaybeinstalledinthedischargeline Thedischarge line must be a minimum of 4 above a drain and installed such that it allows complete drainage of both the PRV a...

Page 37: ... will facilitate any necessary servicing Plastic or PEX type plumbing materials are not suitable for connecting directly to or within 18 of the water heater Although water piping throughout the building may not be copper we require that copper or suitably rated stainless steel flex line be used for the water connections for 18 on either side of the water heater follow local codes if more stringent...

Page 38: ...purge valve in the recirculation circuit dedicated mode near the appliance water inlet Turn on the appliance Set the recirculation mode in HMI Wait until there is no air in the recirculation circuit a few minutes Close water taps The recirculation system is operational 4 11 2 Recirculation options House Recirculation Compatible with dedicated return line and cross over mode with thermal by pass va...

Page 39: ...3 Sensormustbeinsertedintothetank pocket and plug in at the tank connector in bottom of the appliance Aquastat 7 736 504 584 Compatible with thermostat type solution example Aquastat Thermostat Aquastatmustbeconnectedto theapplianceusingthetankconnectorinbottomofthe appliance Internal NTC Allows tank loading without using any external sensor cable Temperature readings will be made at the appliance...

Page 40: ...tem heat load For external pump sizing please refer to the pressure drop curves fig 34 Also remember to account for system piping pressure loss A minimum of 1 7 GPM is recommended to provide adequate flow through the water heater when determining the size of the primary pump Greentherm T9900 SE i tankless water heaters are approved for use in combination DHW and space heating applications open loo...

Page 41: ...t off gas valve field supplied 6 Thermal expansion tank as required 7 Air purge field supplied 8 Cold water supply 9 Check valve field supplied 10 Thermostatic mixing valve field supplied 11 Thermometer optional field supplied 12 DHW outlet 13 Thermostat only valid if air handler includes a internal pump field supplied 14 Air handler 15 Shutoff valve field supplied 16 NTC sensor Bosch accessory ...

Page 42: ...Installation instructions Greentherm T9900 SE i 6 720 813 635 2019 03 42 Fig 34 Pressure drop curve ...

Page 43: ...be from the test point Tighten the screw inside test point fitting Depending on the vent length gas pressures below 5 W C for Natural Gas or 8 W C for LPG may result in reduced power output or possible error codes and must be corrected See Gas Connections chapter 4 8 page 33 Fig 35 Gas pressure test port 1 Gas pressure measuring port Table 20 Inlet gas pressure readings 5 Electrical connections 5 ...

Page 44: ...e 12 Disconnect all the cables from the control unit Press the four snaps of the control unit and remove the cover Fig 37 Control Unit Press the four snaps inside the control unit and remove the PCB Check the fuse in the printed circuit board for electrical continuity see fig 38 1 Fig 38 Fuse position 1 Fuse After checking the fuse reinstall all parts in reverse order 6 Operation instructions Fig ...

Page 45: ...the police and fire department from outside the building From outside the building call the gas utility company and a trained and certified installer B Use only your hand to press the on off control button Never use tools If the touch control display is dirty wipe down with a damp cloth Forceful repair may result in a fire or explosion C Do not use this appliance if any part has been under water I...

Page 46: ...er temperatures 6 4 1 Programming the default setpoint temperature Fig 43 Program key Touch the symbol or to select the desired temperature Hold the OK button for 3 seconds to save the default set point temperature When the display stops blinking the default set point temperature is saved in memory Selecting the default setpoint temperature In order to select the default setpoint temperature Touch...

Page 47: ...perature sensor of the water outlet pipe Air Pressure current box pressure mbar or psi x100 Fan Speed current fan speed Water Flow total flow through main valve bypass AmbientNTC currenttemperatureinsidecabinetnearthe fan Exhaust Gas NTC Exhaust flue gases temperature sensor SS Hex NTC Flue gases temperature sensor at the condensing unit inlet between heat exchangers AmbientNTC currenttemperaturei...

Page 48: ...mbol when month is correct Use the symbols or to set the day Touch the symbol when the day is correct Use the symbols or to set the year Touch the symbol when the year is correct Touch the symbol to exit the Date menu Clock and Date are defined Touch the symbol the Hours and Clock blink 3 times and exit menu A1 Recirculation Choosing a recirculation program Use the symbols or to scroll through the...

Page 49: ...he symbol to choose On On starts to blink Touch the symbol to define first day of vacation MM DD YYYY Use the symbols or to set the month Touch the symbol when month is correct Use the symbols or to set the day Touch the symbol when day is correct Use the symbols or to set the year Touch the symbol when year is correct Use the symbols or to define the total of days Touch the symbol to finish progr...

Page 50: ...splay shows SA Settings Touch the symbol until the display shows AA Display Timeout Touch the symbol Display shows Backlight Fig 46 Backlight control menu Touch the symbol Use the symbols or to select DIM Touch the symbol Use the symbols or to set between 10 seconds and 1 hour Touch the symbol after reaching the desired value The time is defined the brightness value must now be programmed Use the ...

Page 51: ...ction is in green color Touch symbols or to select Unlocked Touch the symbol Touch the symbol to return to main menu RS Recirculation Settings To define recirculation comfort level Touch the symbol Touch symbols or to define comfort level 1 2 9 Choosingahighercomfortlevel 9 willsettherecirculation water temperature closer to the set point defined on the water heater Choosing a lower value 1 will f...

Page 52: ...here is water flow Access menu PA Touch symbol OK Touch symbols or to select MF main valve Touch symbol OK The appliance will start the auto calibration of main valve Water flow will shut off Wait until indication of calibration completed appears on the screen Touch the symbol to return to main menu 6 7 2 BP bypass valve auto calibration Open one hot water tap Flow rate between 0 80 GPM and 1 80 G...

Page 53: ...3 3 2 Remove the four screws that retain the cover plate to the gas manifold see fig 48 plate in grey color Fig 48 Gas manifold Remove metal plate and seal The 3 restrictor plates should be pre assembled onto their tray but if loose in box follow installation instructions as shown in Figs 49 and 50 1 Insert the LP conversion plate in the appropriate location shown in Figs 49 and 50 2 DANGER All th...

Page 54: ...ettings Touch the symbol Use the symbols or to select A7 Wireless Connectivity Touch the symbol Display shows WF Wi Fi Touch the symbol Activate Wi Fi module Two options are available to activate Wi Fi module in the appliance Connect the appliance to a network SC Scan or Configure Hotspot menu in the appliance HT Hotspot This option is generally chosen in case there is no domestic Wi Fi connection...

Page 55: ... Wireless Connectivity will be the following ST Status DI Disconnect RE Reset MA MAC Address IP IP Address How to access the Wi Fi options Touch the symbol Display shows P4 Information Touch the symbol until the display shows SA Settings Touch the symbol Use the symbols or to choose A7 Wireless Connectivity Touch the symbol Display shows Wi Fi Touch the symbol Usethesymbols or toselectoneoptionfro...

Page 56: ... the electrical power supply shut off the manual gas valve and shut off the water valves whenever servicing DANGER Replace all dismantled seals and o rings with new ones NOTICE Inspect the complete water heating system once a year Follow points 5 and 6 in Table 23 after 400 operation hours or 25000 cycles whichever occurs first see chapter 6 5 1 Data History Inspect the water heater and components...

Page 57: ...izing for seasonal use The water heater must not be installed in a location where it may be exposed to freezing temperatures unless connected to electrical power All water must be drained from the heater in order to avoid damage to the unit from exposure to freezing temperatures NOTICE Useofagentssuchasanti freezeisnotpermittedandvoidsthe warranty as they may cause damage to the water heater s int...

Page 58: ...t clear Changing to a fresh solution may be necessary during this process Disconnect all lines and drain all solution from heat exchanger Properly discard the solution Close the inlet drain connection Position a container below the outlet drain connection and connect the cold water supply Open the cold water supply shutoffvalveandflushtheheatexchangerwithcleanwater Close the cold water shutoff val...

Page 59: ...To lower output temperature see chapter 6 4 page 45 2 Confirmtheheater sgastypecoincideswiththetypeofgas being supplied See fig 2 page 12 for location of rating plate 8 4 Water is not hot enough 1 Selected temperature on the unit is too low To raise output temperature see chapter 6 4 page 45 2 Confirmtheheater sgastypecoincideswiththetypeofgas being supplied See fig 2 page 12 for location of ratin...

Page 60: ...sed by improper gas supply conditions gas pressure and or gas composition Two types of noise can be heard low pitch noise vibration rumbling and high pitch noise vibration whistling 8 7 1 High pitch noise 1 Verify if correct gas type is selected see section 6 8 2 Verify is gas pressure is within specified range see section 3 2 3 Ensure that the venting used is according to specifications see secti...

Page 61: ...cable for the display is connected Open all hot water taps to achieve a flow rate of at least 6 gallonsperminute 1tuband2sinksshouldbesufficient If heater goes back to P2 open more hot water fixtures to allow sufficient flow and access to P1 menu Record the manifold gas pressure reading in table 24 Manifold gas pressure refers to the relative pressure between gas manifold nozzles inlet and outlet ...

Page 62: ...Adjustment Open hot water taps when the display shows Open Taps This message will appear approximately 5 minutes after initiate the automatic adjustment The appliance will display Open Taps whenever more flow is required to continue the automatic adjustment process 1 tub and 2 sinks are usually sufficient Fig 57 Auto Adjust Open Taps Wait until a green check mark is displayed indicating the succes...

Page 63: ...low 1 ChangeL1GasAdjustparameteruntilreaches100 2 Increase L1 Gas Adjust parameter to increase output power and vice versa How to enter a new tuning parameter i e L1 L2 A1 A2 Select the desired parameter Touch the symbol The symbols appears in the display Change to the desired value Touch the symbol when finished The symbols disappear L1 Gas Adjust is now complete A1 Air Adjust Touch symbols or un...

Page 64: ...uch the symbol to return to the main menu Minimum power adjust is completed Table 26 L2 ION values Gas and Air adjustment is complete 8 12 3 Restore factory values To restore factory values for combustion settings Proceed with the following steps To enter P1 and P2 menu Access to AU Technical Settings menu Touch symbols or to select CA menu Display shows CA Combustion Adjust Touch the symbol to en...

Page 65: ...ameter IC Ionization control Default setting is On Only a qualified technician can change this parameter PP P2A2 Default setting is On Only a qualified technician can change this parameter P0 Min Power Ionization control Default setting is Off Only a qualified technician can change this parameter 8 13 CO emissions check In case air gas combustion adjustment has been performed check emissions using...

Page 66: ...s max input P1 8 4 9 0 250 ppm min input P2 N A 100 ppm LP Gas max input P1 9 7 10 4 250 ppm min input P2 N A 100 ppm Values above are for climate controlled conditions Inputs such as gas pressure heating value of the gas humidityandtemperatureofcombustionairallimpactCO and CO2 values Changes in these inputs can result in different CO and CO2 values on the same appliance CO2 range Max CO level mea...

Page 67: ...persists 1 A3 Flue gases temperature sensor 15 disconnected or damaged Check sensor wire connections 1 2 Replace the sensor and or wire connections if the problem persists 1 A4 Air temperature sensor 18 disconnected or damaged Check sensor wire connections 1 2 Replace the sensor and or wire connections if the problem persists 1 A5 Condensing unit flue temperature sensor 16 disconnected or damaged ...

Page 68: ...circulation Check pump and connections 1 Check recirculation circuit for any blockage C5 Bypass water valve 8 disconnected or damaged Check bypass water valve wire connections 1 If the problem persists Replace the bypass water valve and or wire connections After valve replacement proceed with bypass water valve calibration section 6 7 1 C7 Fan 2 disconnected or damaged Check fan wire connections R...

Page 69: ...isconnecttheapplianceandpurgehydrauliccircuit to remove air If the problem persists Reduce setpoint temperature to minimize temperature instabilities E3 Flue gases temperature above 167 F 75 C residential or 2 minutes above 145 F 63 C Appliance burner cut off to prevent overheating Descale appliance section 7 3 1 Reset error touch and hold on off button for 3 seconds If the problem persists Check ...

Page 70: ...ement perform gas and air tuning section 8 12 1 EF Wrong gas connected LP instead of NG for current appliance configuration Check gas type section 6 8 1 F2 Electronic control unit internal error Reset error touch and hold on off button for 3 seconds If the problem persists Replace electronic control unit 1 F3 Electronic control unit internal error Reset error touch and hold on off button for 3 sec...

Page 71: ... Display reads SOLAR and water temperature low Power demand lower than appliance minimum output power Increase hot water flow increase setpoint temperature Displayshowsared X HMI display isnotcommunicatingwithElectronic Control Unit Reset the appliance by unplugging it for some seconds at least 10 and plug it back in Replace the HMI display and or wire connections and or electronic control unit Hi...

Page 72: ...Electrical diagram Greentherm T9900 SE i 6 720 813 635 2019 03 72 10 Electrical diagram Fig 66 Electrical diagram ...

Page 73: ...on 9 Water bypass valve 10 Electrovalve 3 11 Electrovalve 1 12 Electrovalve 2 13 Gas valve Solenoide safety 14 Thermofuse 15 Water flow sensor 16 Exhaust temperature sensor 17 Exhaust temperature sensor Between chambers 18 Water outlet bypass temperature sensor 19 Cabinet temperature sensor 20 Water outlet HC temperature sensor 21 Water inlet temperature sensor 22 Tank temperature sensor 23 Water ...

Page 74: ...nsing unit flue gases temperature sensors characteristics 40 22 4 14 32 50 68 86 104 122 140 158 176 194 40 30 20 10 0 10 20 30 40 50 60 70 80 90 100 110 120 212 230 248 0 1 1 100 RESISTANCE KOHM TEMPERATURE ºF ºC 6720816948 40 1V 10 40 4 32 68 104 140 176 212 284 320 392 428 464 40 20 0 20 40 60 80 100 140 160 200 220 240 248 120 356 180 0 01 0 1 1 10 100 RESISTANCE KOHM TEMPERATURE ºF ºC 6720816...

Page 75: ... filter 2 Air fan 3 Control unit 4 Gas manifold 5 Burner 6 Heat exchanger 7 Condensing unit 8 Main water valve 9 By pass pipe 10 Recirculation pump 11 Gas valve 12 Condensate trap 13 By pass water valve 14 Ionization sensor 15 Ignition electrodes 16 PRV connection 17 HE drain 18 Power cord 19 Gas connection 20 Condensate drain 21 HE drain 6720813635 24 2V 17 18 19 20 21 ...

Page 76: ...se water flowneeded mixingcoldwatertoregulatetemperaturewill increase the water flow with consequent waste of water 14 Installer Checklist to be completed by installer upon installation Table 30 Installation manual should be left with the owner after the installation is tested and completed Additional copies of the installation manual are available at www boschheatingandcooling com Serial Number1 ...

Page 77: ... deleting some characters in from glyph table and copy and distribute such modifications under the terms of Section 1 above provided that the following conditions are met Youmustinsertaprominentnoticeineachmodifiedfilestating how and when you changed that file You must make such modifications Freely Available as a whole to all third parties under the terms of this License such as by offering acces...

Page 78: ...Y AND PERFORMANCE OF THE FONT IS WITH YOU SHOULD THE FONT PROVE DEFECTIVE YOU ASSUME THE COST OF ALL NECESSARY SERVICING REPAIR OR CORRECTION DAMAGES WAIVER UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING INNOEVENTWILLANYCOPYRIGHTTHOLDERS OR OTHER PARTIES WHO MAY COPY MODIFY OR REDISTRIBUTE THEFONTASPERMITTEDABOVE BELIABLETOYOUFORANY DIRECT INDIRECT CONSEQUENTIAL INCIDENTAL SPECIAL OR EX...

Page 79: ...of the Font Software shall not be used to promote endorse or advertise any Modified Version except to acknowledge the contribution s of the Copyright Holder s and the Author s or with their explicit written permission 5 The Font Software modified or unmodified in part or in whole must be distributed entirely under this license and must not be distributed under any other license The requirement for...

Page 80: ...100 Fax 603 965 7581 www boschheatingandcooling com U S A Products manufactured by Bosch Thermotechnik GmbH Junkersstrasse 20 24 D 73249 Wernau www bosch thermotechnology com Bosch Thermotechnology Corp reserves the right to make changes without notice due to continuing engineering and technological advances ...

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