Bosch Combi FS, Operating Instructions Manual

Page 1: ...6720810589 2021 01 CA US Operating instructions Residential Gas Condensing Boiler Greenstar FS Combi FS 6720810589 00 2Wo KBR21 28 35 42 3A KWB28 35 42 3A ...

Page 2: ... the boiler water pressure 12 3 2 Topping up the heating system water 12 4 Operation 13 4 1 Overview of controls 14 4 2 Switching the appliance ON OFF 15 4 3 Turning the space heating ON 16 4 4 Programming the heating control unit 17 4 5 KBR 3A appliances with DHW tank Setting the DHW temperature 18 4 6 KWB 3A appliances combi boilers Setting the DHW temperature 19 4 7 Setting manual summer mode 2...

Page 3: ... FS Combi FS 6720810589 2021 01 Contents 6 Energy saving tips 27 7 Troubleshooting 29 8 Maintenance 30 9 Environmental protection and disposal 31 9 1 Environmental protection and disposal 31 10 Quick reference 32 ...

Page 4: ... not taken The following keywords are defined and can be used in this document DANGER DANGER indicates that severe or life threatening personal injury will occur WARNING WARNING indicates that severe to life threatening personal injury may occur CAUTION CAUTIONindicatesahazardoussituationwhich ifnotavoided couldresultinminor to moderate injury NOTICE NOTICE is used to address practices not related...

Page 5: ...ty instructions H General information This manual is available in English and French Keep this manual for future use Observe the safety instructions of this manual beforeputtingtheheatingapplianceintooperation Iftheinformationinthismanualisnotfollowedexactly a fire or explosion may result causing property damage personal injury or loss of life Do not store or use gasoline or other flammable vapors...

Page 6: ...w the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a trained and certified heating contractor service agency or the gas supplier H If you smell gas Turn off the gas shut off valve Open windows and doors Do not touch any electrical switch telephone and do not use outlets Extinguish all open flames Do not smo...

Page 7: ...anger of flue gas poisoning if supply of combustion air is insufficient Safeguard supply of combustion air Do not cover or reduce the size of ventilation openings in doors windows and walls Safeguard sufficient supply of combustion air also for appliances installed at a later date e g kitchen exhaust fans clothes dryers and air conditioning units with vent to the outside Never operate the applianc...

Page 8: ...n occur H Risk of damage due to operator error Operator errors can result in personal injury and damage to property Ensure that children never operate this appliance unsupervised or play with it Ensure that only people who know to operate this appliance correctly have access to it H Installation conversion Only have the appliance installed or modified by a trained and certified heating contractor ...

Page 9: ...ency and environmentally sound combustion H Explosive and easily combustible materials Never use or store easily combustible materials paper thinners paints etc near the appliance H Combustion air room air To prevent corrosion keep the supply of combustion air room airfreeofcorrosivesubstances e g halogenated hydrocarbons that contain chlorine or fluorine compounds H Overheating of the appliance S...

Page 10: ...r water 2 Information about the appliance 2 1 Certifications This product has been tested and certified for the US and the Canadian market and complies with all applicable standards required for the US and the Canadian market 2 2 Proper use Theappliancemayonlybeinstalledinclosedloophotwatercentralheatingsystems Any other purpose is considered improper use Any resulting damage is excluded from the ...

Page 11: ...ce A 23 KWB42 3 Combi appliance A 23 Table 2 Appliances types K Floor standing heating appliance W DHW heating B Condensing technology R Constant temperature control 21 42 Output in kW 42kW 143 310BTU hr 3 Version A Fan supported appliance 23 Natural gas NG 3 Prepare for operation If existing open the heating supply valve and the heating return valve if existing open the cold water valve and the D...

Page 12: ...to a trained and certified heating contractor 0010026578 001 1 0 2 3 4 bar psi 15 30 45 Fig 1 Pressure gauge 3 2 Topping up the heating system water Topping up the heating system water is different on every system Therefore you should ask a trained and certified heating contractor to show you how it is done Maximum pressure of 30 psi 2 07 bar at maximum heating water temperature must not be exceed...

Page 13: ...g options for controlling the heating system are available Weather compensating control unit installed in the boiler Weather compensating control unit mounted on the wall Room thermostat Weather compensating control with room influence room thermostat Third party system control unit Therefore please read the operating instructions for the heating control unit used Page 32 contains a quick referenc...

Page 14: ...n test button for contractors see installation instructions 2 Service button for contractors see installation instructions 3 Burner operation indicator lamp 4 ON OFF switch 5 Key pad lock 6 ECO button 7 Reset button 8 Display 9 System water pressure gauge 10 DHW temperature control 11 Blank panel for optional programmer 12 Heating temperature control ...

Page 15: ...er in F necessary convert to C a Service function O E Metric or US costomary units max 1 2 3 4 5 6 6 720 613 896 05 1O Fig 3 If the display shows in alternation with the supply temperature the trap filling function is active Shutdown Switch the appliance OFF using the ON OFF switch The display goes out If the appliance is taken out of service for a longer period observe frost protection section 4 ...

Page 16: ... display With radiant floor heating limit the maximum permissible supply temperature Adjusting the supply temperature with the heating temperature control Radiant floor heating e g setting 3 approx 122 F 50 C Panel or cast iron radiator heating setting 6 approx 167 F 75 C Heating with supply temperatures up to 194 F 90 C setting max eco reset 6 720 641 933 53 1O max 1 2 3 4 5 6 max 1 2 3 4 e 6 min...

Page 17: ... F 50 C Radiant floor heating system 4 approx 140 F 60 C 5 approx 153 F 67 C 6 approx 167 F 75 C Radiator heating system max approx 194 F 90 C Convector heating Table 3 Typical supply temperatures 4 4 Programming the heating control unit Observe the operating instructions for the heating control unit included in the scope of delivery There you can read How to set the operating mode How to adjust t...

Page 18: ...mperatureontheDHWthermostat ThesetDHWtemperature flashes on the display for 30 seconds 6 720 641 933 54 1O max 1 2 3 4 5 6 reset eco max 1 2 3 4 e 6 if there is reason for concern for contamination from bacteria such as Legionella considersettingtheDHWthermostat toatleast e 131 F 55 C Thissetting ensures an economical and comfortable DHW generation Consult your local water department or municipali...

Page 19: ...on until it lights up switches from Comfort mode to Economy mode Comfort mode ECO button is not lit default setting In comfort mode the DHW tank has priority The DHW tank is heated to the set temperature first Then the appliance switches to central heating mode Economy mode ECO button lit InEconomymode theappliancealternatesbetweencentralheatingandDHWmode 4 6 KWB 3A appliances combi boilers Settin...

Page 20: ...d at the set temperature Consequently DHW draws are immediate however the appliance may run even if no DHW is being drawn Economy mode ECO button lights up DHW is only generated when DHW is drawn On demand Quickly open and close a DHW tap to signal the appliance to heat to the selected temperature After a short wait DHW will be available The DHW on demand signal allows maximum gas and water saving...

Page 21: ... from freezing Observe frost protection measures where there is a risk of freezing Make a note of the setting of the boiler high limit dial Turn the boiler high limit dial counterclockwise to 6 720 641 933 82 1O eco reset max 1 2 3 5 6 max min 1 2 3 4 e 6 Fig 6 For further information see the operating instructions for the heating control unit included in the scope of delivery ...

Page 22: ...formation see the operating instructions for the heating control unit included in the scope of delivery Alternatively if you prefer switching the appliance OFF Ask a trained and certified heating contractor to mix anti freeze see installation instructions into the heating water All DHW pipes and DHW tank must be completely drained Frost protection of the DHW tank Turn the DHW thermostat e counterc...

Page 23: ...rmostat the service button and the ECO button Activating the key pad lock Press the key pad lock button until and the heating supply temperature are alternating on the display max 1 2 3 4 5 6 max 1 2 3 4 e 6 eco reset 6 720 641 933 83 1O min Fig 9 Unlocking the key pad Press the key pad lock button until the display shows only the supply temperature ...

Page 24: ...anti seize function active Key pad lock active Condensate trap filling function active Bleeding function active Excessively rapid increase in supply temperature temp gradient monitoring Heating mode is disabled for two minutes If this message appears repeatedly inform a trained and certified heating contractor Drying function Table 6 ...

Page 25: ...including the taps For solar DHW tanks the solar portion of the tank is not covered WARNING Risk of scalding Hot water can result in severe scalding Carry out thermal disinfection only outside the normal hours of use The water in the tank will take a while to cool down to the DHW temperature as a result of heat loss be aware that after thermal disinfection the DHW may be hotter than the set temper...

Page 26: ...um temperature has been reached Open all DHW taps from the nearest to the one furthest away and draw off hot water until it reaches a minimum of 158 F 70 C at all taps for at least 3 minutes Reset the DHW thermostat DHW recirculation pump and heating control to standard operation To cancel the thermal disinfection Switch the appliance OFF and ON again The appliance starts up again and the current ...

Page 27: ...pact pollution etc remainas low as possible over an extended period of time we recommend that you sign an inspection maintenance contract with a trained and certified heating contractor covering scheduled annual service and maintenance Heating control unit Use a heating control unit with room temperature influence or an outdoor reset control unit and thermostatic valves For further information see...

Page 28: ...lled in the room when venting Domestic hot water DHW Always set the DHW temperature as low as possible A lower setting on the thermostat means a higher rate of energy savings Furthermore higher DHW temperatures result in increased limescale deposits and thereby may impair the function of the appliance e g longer heating up times or lower output Recirculation pump If there is a DHW recirculation pu...

Page 29: ...he reset button is flashing Press the reset button and hold it until appears on the display The appliance starts up again and the current supply temperature is displayed If the reset button is not flashing Switch the appliance OFF and ON again The appliance starts up again and the current supply temperature is displayed If the fault persists Contact a trained and certified heating contractor for a...

Page 30: ...Inspection and maintenance The operator is responsible for the safety and environmental compatibility of the heating system see local regulations It is therefore recommended to sign a maintenance and inspection contract with a trained and certified heating contractor that provides annual inspection and maintenance This ensures high efficiency and environmentally compatible combustion Cleaning the ...

Page 31: ...tion laws and regulations are strictly adhered to Toprotecttheenvironment weusethebestpossibletechnologyandmaterialstaking into account economic points of view Packaging method For the packaging we participate in the country specific recycling systems which guarantee optimal recycling All packaging materials used are environmentally friendly and recyclable Old appliances Old appliances contain val...

Page 32: ...0 641 933 55 1O max 1 2 3 4 5 6 reset eco max 1 2 3 4 e 6 ECO button not lit comfort mode ECO button lit economy mode Turning space heating ON eco reset 6 720 641 933 53 1O max 1 2 3 4 5 6 max 1 2 3 4 e 6 min Heating control Set the maximum supply temperature on the appliance Set room thermostat to the desired temperature Key pad lock max 1 2 3 4 5 6 max 1 2 3 4 e 6 eco reset 6 720 641 933 83 1O m...

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Page 36: ...552 1100 Fax 603 965 7581 www bosch climate us 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 ...