Bosch C1210ES Specifications

Temperature Modulated with Electronic Ignition Suitable for heating potable water and space heating (Intended for variable flow applications)INDOOR RE

10 | Appliance detailsC 1210 ES/ESC6 720 644 887 (2014/11)3.5 Dimensions and minimum installation clearancesFig. 6 Dimensions[1] On/Off button[2] Rese

Installation instructions | 116 720 644 887 (2014/11)C 1210 ES/ESCFig. 7 Side view4 Installation instructions4.1 Specialized toolsThe following specia

12 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)4.3.1 Vent materialAll combustion air and vent pipe materials and fittings must comp

Installation instructions | 136 720 644 887 (2014/11)C 1210 ES/ESC4.3.2 Vent specificationsEstablish vent clearances that comply with the vent manufac

14 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)Calculation example for 4" venting:ExhaustCombustion airFor this example, the m

Installation instructions | 156 720 644 887 (2014/11)C 1210 ES/ESCRequired direct vent terminal clearances (twin pipe / concentric penetration)Fig. 9[

16 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)Required other than direct vent terminal clearances (single pipe penetration)Fig. 10

Installation instructions | 176 720 644 887 (2014/11)C 1210 ES/ESC4.3.3 Vent configuration examplesBelow are approved examples of vertical and horizon

18 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)Fig. 15 Horizontal venting system (single pipe penetration)[1] Exhaust pipe[2] Drain

Installation instructions | 196 720 644 887 (2014/11)C 1210 ES/ESCFig. 18 Appliance drain installation[1] Leave minimum ¼ " air gap[2] Trap requi

2 | Table of contentsC 1210 ES/ESC6 720 644 887 (2014/11)Table of contents1 Key to symbols and safety instructions . . . . . . . . . . . . . . . . . .

20 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)Fig. 22[1] Good[2] Better[3] BestFig. 23[1] Good[2] Better[3] Best[4] Enclosed vent

Installation instructions | 216 720 644 887 (2014/11)C 1210 ES/ESC4.3.7 Fan speed adjustment! IMPORTANT INFORMATION:Natural gas heaters with installat

22 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)Adjusting minimum power fan speed (P2)To select fan speed:▶ Press ON/OFF button in

Installation instructions | 236 720 644 887 (2014/11)C 1210 ES/ESC4.4 Combustion air requirementsTwin pipe and Concentric pipeThe water heater is desi

24 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)If wall is sheathed with plaster or drywall, it is recommended that two support boar

Installation instructions | 256 720 644 887 (2014/11)C 1210 ES/ESC4.8 Gas piping & connections Before connecting the gas supply, check the rating

26 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)4.8.1 Gas Line Sizing Tables for NATURAL GASFor your convenience see below for an ex

Installation instructions | 276 720 644 887 (2014/11)C 1210 ES/ESC4.8.2 Gas Line Sizing Tables for LP GASFor your convenience see below for an excerpt

28 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)4.9 Water connections ▶ When facing the heater, the ¾ ” cold connection is on the bo

Installation instructions | 296 720 644 887 (2014/11)C 1210 ES/ESCFig. 33 Plumbing Connections (with shutoff valves) and Pressure Relief Valve[1] Pres

Key to symbols and safety instructions | 36 720 644 887 (2014/11)C 1210 ES/ESC1 Key to symbols and safety instructions1.1 Key to symbolsWarningsThe fo

30 | Installation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)▶ Check water level in the condensate trap.Fig. 38 Water level in condensate trap▶ A

Installation instructions | 316 720 644 887 (2014/11)C 1210 ES/ESCFig. 40 Pressure drop curveFig. 41 Space heating diagram[1] Hot water outlet[2] Cold

32 | Electrical connectionsC 1210 ES/ESC6 720 644 887 (2014/11)4.14 Measuring gas pressureConfirm gas pressure upon installation.Connecting manometer▶

Operation instructions | 336 720 644 887 (2014/11)C 1210 ES/ESCNote: Outlet appliance is plugged in to should be clear from possible water damage.5.2

34 | Operation instructionsC 1210 ES/ESC6 720 644 887 (2014/11)Fig. 49 Temperature indicatorFig. 50 Error indicatorFig. 51 Locked condition indicator

Operation instructions | 356 720 644 887 (2014/11)C 1210 ES/ESCSetting the water temperatureThe desired temperature of the hot water can be adjusted o

36 | Maintenance and serviceC 1210 ES/ESC6 720 644 887 (2014/11)After following instructions indicated in “Troubleshooting” section,▶ press reset butt

Maintenance and service | 376 720 644 887 (2014/11)C 1210 ES/ESCinstructions on descaling the heat exchanger.Fin Coils• Inspect heat exchanger fincoil

38 | Maintenance and serviceC 1210 ES/ESC6 720 644 887 (2014/11)Condensing heat exchanger unit maintenance;▶ Shut off power. Disconnect power cord.▶ D

Maintenance and service | 396 720 644 887 (2014/11)C 1210 ES/ESCC. Adjusting CO2:Note: P1 adjustment will change the P2 reading. Confirm the P1 value

4 | Key to symbols and safety instructionsC 1210 ES/ESC6 720 644 887 (2014/11)Risk of scalding at the hot water draw-off point▶ When the water heater

40 | Maintenance and serviceC 1210 ES/ESC6 720 644 887 (2014/11)7.6 Program valuesThis section describes details on programming the appliance. For mos

Maintenance and service | 416 720 644 887 (2014/11)C 1210 ES/ESC7.7 Control board diagnostics1. Press ON/OFF button into ON.2. Press and hold simult

42 | TroubleshootingC 1210 ES/ESC6 720 644 887 (2014/11)8Troubleshooting8.1 IntroductionMany of the questions customers ask regarding operation of thi

Troubleshooting | 436 720 644 887 (2014/11)C 1210 ES/ESC8.6 Hot water temperature fluctuates at tap1. Hot water is very hot out of the water heater, r

44 | Problem solvingC 1210 ES/ESC6 720 644 887 (2014/11)9Problem solving9.1 Error code diagnosticsTo remove error code from the display, press the res

Problem solving | 456 720 644 887 (2014/11)C 1210 ES/ESC(Flashing) Water flow signal over specified maximum value.Water flow > 10 gallon/min.(Statu

46 | Problem solvingC 1210 ES/ESC6 720 644 887 (2014/11)No flame ionization detected with water flow.1. Verify that all manual gas shut off valves are

Electrical diagram | 476 720 644 887 (2014/11)C 1210 ES/ESC10 Electrical diagramFig. 71 Electrical scheme[1] Inlet water temperature sensor[2] Outlet

48 | Sensor resistance chartsC 1210 ES/ESC6 720 644 887 (2014/11)11 Sensor resistance chartsFig. 72 Outlet sensor characteristicsFig. 73 Inlet sensor

Sensor resistance charts | 496 720 644 887 (2014/11)C 1210 ES/ESCFig. 74

Key to symbols and safety instructions | 56 720 644 887 (2014/11)C 1210 ES/ESCFor your safety▶ Do not store or use gasoline or other flammable, combus

50 | Functional schemeC 1210 ES/ESC6 720 644 887 (2014/11)12 Functional schemeFig. 75 Functional schemeFan speedOK?waitingtime of 10spassed?water tapo

Interior components diagram and parts list | 516 720 644 887 (2014/11)C 1210 ES/ESC13 Interior components diagram and parts list13.1 Interior componen

52 | Interior components diagram and parts listC 1210 ES/ESC6 720 644 887 (2014/11)Fig. 77 Appliance overview

Interior components diagram and parts list | 536 720 644 887 (2014/11)C 1210 ES/ESC13.2 Components diagram13.2.1 Group 1Fig. 78 Components DiagramItem

54 | Interior components diagram and parts listC 1210 ES/ESC6 720 644 887 (2014/11)13.2.2 Group 2Fig. 79 Components Diagram

Interior components diagram and parts list | 556 720 644 887 (2014/11)C 1210 ES/ESCItem Description Reference1 Heat exchanger 8 705 406 419 02 Heat ex

56 | Interior components diagram and parts listC 1210 ES/ESC6 720 644 887 (2014/11)13.2.3 Group 3Fig. 80 Components DiagramItem Description Reference1

Interior components diagram and parts list | 576 720 644 887 (2014/11)C 1210 ES/ESC13.2.4 Group 4Fig. 81 Components DiagramItem Description Reference1

58 | Interior components diagram and parts listC 1210 ES/ESC6 720 644 887 (2014/11)13.2.5 Group 5Fig. 82 Components DiagramItem Description Reference1

Interior components diagram and parts list | 596 720 644 887 (2014/11)C 1210 ES/ESC13.2.6 Group 6Fig. 83 Components DiagramItem Description Reference1

6 | FCC rulesC 1210 ES/ESC6 720 644 887 (2014/11)2 FCC rulesFCC:This device complies with Part 15 of the FCC rules. Operation is subject to the follow

60 | Protecting the environmentC 1210 ES/ESC6 720 644 887 (2014/11)14 Protecting the environment PackingThe packing box may be fully recycled as confi

Installer Checklist to be completed by installer upon installation | 616 720 644 887 (2014/11)C 1210 ES/ESC15 Installer Checklist to be completed by i

62 | C 1210 ES/ESC6 720 644 887 (2014/11)Notes

| 636 720 644 887 (2014/11)C 1210 ES/ESCNotes

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Appliance details | 76 720 644 887 (2014/11)C 1210 ES/ESC3.2 Specifications (Technical data) Approved in US/CanadaSafety devices• Flame failure device

8 | Appliance detailsC 1210 ES/ESC6 720 644 887 (2014/11)3.3 Unpacking the heaterBefore installing the unit, be certain you have the correct heater fo

Appliance details | 96 720 644 887 (2014/11)C 1210 ES/ESC3.3.3 Remove combustion cover (service only; unplug appliance before removing cover)▶ Open th