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Bosch C 1210 ES/ESC Manual

Natural gas liquefied petroleum gas indoor residential and commercial models
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INDOOR RESIDENTIAL AND COMMERCIAL MODELS
C 1210 ES/ESC
C 1210 ES/ESC - Natural Gas / C 1210 ES/ESC - Liquefied Petroleum (LP) Gas
Temperature Modulated with Electronic Ignition Suitable for heating potable water and space heating
(Intended for variable flow applications)
Warning: If the information in this manual is not followed
exactly, a fire or explosion may result causing property dam-
age, personal injury or death.
Do not store or use gasoline or other flammable vapours and
liquids in the vicinity of this or any other appliance.
Improper installation, adjustment, alteration, service or main-
tenance can cause injury or property damage. Refer to this
manual. For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
In the Commonwealth of Massachusetts this product must be
installed by a licensed plumber or gas fitter.
Upon completion of the installation, these instructions should
be handed to the user of the appliance for future reference.
What to do if you smell gas
• Close gas valve. Open windows.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in
your building.
• Immediately call your gas supplier from a neighbour's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire depart-
ment.
• Installation and service must be performed by a qualified
installer, service agency or the gas supplier.

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  Summary of Contents for Bosch C 1210 ES/ESC

  • Page 1 INDOOR RESIDENTIAL AND COMMERCIAL MODELS C 1210 ES/ESC C 1210 ES/ESC - Natural Gas / C 1210 ES/ESC - Liquefied Petroleum (LP) Gas Temperature Modulated with Electronic Ignition Suitable for heating potable water and space heating (Intended for variable flow applications)
  • Page 2: Table Of Contents

    Use of optional remote control accessory 16 LIMITED WARRANTY FOR BOSCH THERM 1210 ESC TANKLESS (part no. TSTAT2) ......34 WATER HEATERS .
  • Page 3: Key To Symbols And Safety Instructions

    ▶ Immediately correct all faults to prevent system damage. ▶ In the Commonwealth of Massachusetts, the water heater must be ▶ Use only Bosch spare parts! Damage caused by the use of parts not installed by a licensed plumber. supplied by Bosch may void the warranty.
  • Page 4 ▶ After a flood, do not use the appliance if any part has been submerged. Damage to appliances that have been submerged can be quite severe and pose numerous safety risks. ▶ Every appliance that has been submerged must be replaced. 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 5 ▶ The maximum inlet gas pressure must not exceed the component(s) previously used with a nonpotable value specified by the manufacturer and the minimum water heating appliance. value listed is for the purpose of input adjustment. C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 6: Fcc Rules

    1.5 to 2 minutes • Pressure relief valve 150 PSI (7738001152) 130 °F (54 °C) approx. 30 seconds BOSCH is constantly improving its products, therefore 135 °F (57 °C) approx. 10 seconds specifications are subject to change without prior 140 °F (60 °C) less than 5 seconds notice.
  • Page 7: Specifications (Technical Data)

    Appliance details | 7 Specifications (Technical data) Technical characteristics Units C 1210 ES/ESC Approved in US/Canada Height inches (mm) 30½ (775) Weight pounds (kg) 74 (33.5) Technical characteristics Units C 1210 ES/ESC Capacity Gas types Maximum flow rate at a 45 °F GPM (l/min) 9.2 (35)
  • Page 8: Unpacking The Heater

    • Product registration card • Energy Guide label Please complete and return the enclosed product registration card. The C 1210 ES/ESC is not approved or designed for: • Manufactured (mobile) homes, boats or any mobile installation. (Modular homes are acceptable for installation).
  • Page 9: General Rules To Follow For Safe Operation

    Check with your local gas supplier, and see the section on connecting the gas supply. See chapter 4.8 (page 24). C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 10: Dimensions And Minimum Installation Clearances

    10 | Appliance details Dimensions and minimum installation clearances Fig. 6 Dimensions On/Off button Reset button Program key Power ON or stand-by LED LCD display Up button Down button 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 11: Installation Instructions

    If improperly installed, a hazardous condition such as explosion or carbon monoxide poisoning could result. Bosch Thermotechnology Corp. is not responsible for improperly installed appliances. Common installation practice is to first determine the venting/combustion air point of termination, then design the piping layout back to the heater.
  • Page 12 24 In. long 3- In. Y Concentric Fitting 2- ½ In. Diameter SDR-26 Pipe 37-1/8 in. long 1 3- In. Condensate drain Tee 1.5- In. Condensate drain bushing Table 6 Concentric vent part breakdown 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 13 Combustion air length pipe length 90° 45° Twin pipe 63ft 63ft 2.5ft 1.5ft system Concentric 43ft 43ft 2.5ft 1.5ft system Table 9 Maximum Allowable Exhaust and Combustion Air Lengths for 4" venting C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 14 63’ 90° elbow reduction - 5’ sub-total = 58’ 45° elbow reduction - 3’ Total = 55’ Table 18 For this example, the maximum allowable combustion air pipe length is 55 feet. 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 15 A minimum clearance value determined by testing in accordance with section 2.20, or; b) A reference to the following footnote: “Clearance in accordance with local installation codes and the requirements of the gas supplier.” C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 16 A minimum clearance value determined by testing in accordance with section 2.20, or; b) A reference to the following footnote: “Clearance in accordance with local installation codes and the requirements of the gas supplier.” 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 17 3 ft minimum shown) Termination Minimum above ground or normally expected snow accumulation level Appliance Elbow (note: minimum 1ft of straight vent pipe required) Horizontal run ¼ " per foot down to termination C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 18 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 disposal in accordance with local codes. Fig. 16 Exhaust connection 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 19 Fig. 19 External condensate drain installation 6720608643-19.1V Condensate drain Fig. 21 Blackflow reducer (9301BFP) installed Dispose of condensate in accordance with local codes [LA] Minimum 4" C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 20 20 | Installation instructions Fig. 22 Good Better Best Fig. 23 Good Better Best Enclosed vent pipe (Do not install damper) Unconditioned space (Do not install damper) Preferred damper position for vertical terminations 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 21 * Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see chapter 7.5 for instructions. Table 22 Fan speed adjustment for 4" piping 1) Full equivalent length (inlet + outlet piping + fittings) C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 22 The sign shall read, in print size no less than one half (1/2) inch in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 23: Combustion Air Requirements

    12 inches (304.8mm) of the bottom of the gas supply you will be connecting the heater, See enclosure. Each opening must have a minimum free area of one Fig.2, page 8. square inch per: C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 24: Gas Piping & Connections

    In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/ NFPA 54. 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 25 4.8.1 and 4.8.2, page 26 or the gas line manufacturer’s sizing tables to determine the pipe diameter necessary. If there are more gas drawing appliances on C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 26 (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Follow boxed numbers for piping just one C 1210 ES/ESC (example: ¾” B.I. Natural Gas pipe for 10 ft (3.0m). will handle 278,000 btu’s (81.5 kWh). For multiple appliances combine the total maximum btu input load and then refer to applicable chart below.
  • Page 27: Water Connections

    For water analysis data call your local water department, or if on a well, have well water analyzed periodically. If water quality exceeds one or more of the values specified below, Bosch recommends consulting a local water treatment professional for water softening/conditioning options.
  • Page 28: Filling The Condensate Trap

    Please proceed as follows: ▶ Remove front cover, see fig. 4, page 8. ▶ Open the four clips and remove the combustion cover, see fig. 5, page 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 29: Domestic Hot Water Recirculation

    Bosch supports applications of combination DHW and space heating in an open loop configuration if plumbed similar to fig. 41. Use of a Bosch tankless water heater in a combination DHW and space heating application will result in the product warranty being reduced to 3 years.
  • Page 30 [17] Thermostat Atmospheric vacuum breaker [18] Space heating zone Cold inlet [19] Zone controller Check valve [20] Space heating pump [10] Pump [21] Expansion tank [11] Thermostatic mixing valve [22] Pressure relief valve 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 31: Measuring Gas Pressure

    Canadian Electrical Code, CSA C22.1 Part 1. Do not rely on the gas or water piping to ground the metal parts of the heater. C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 32: Position Of The Fuses In Control Unit

    Up button Down button Power On or stand-by LED Description LCD Display WARNING: Fig. 48 Power bar indicator (input) ▶ Do not use any cleaning aggressive or corrosive agents to clean the window. 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 33: For Your Safety Read Before Operating Your Water Heater

    Temperature selection To select hot water temperature: ▶ Press buttons in order to reach desired temperature. Fig. 53 Solar mode indicator (see chapter 6.4, page 33) Fig. 54 Remote control indicator Fig. 56 C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 34: Use Of Optional Remote Control Accessory (Part No. Tstat2)

    Follow instructions below to reset error first. Record the error code on LCD and consult “Problem solving” chapter 9.1, page 43. Fig. 57 Fig. 60 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 35: Program Button

    Scale build up will shorten the life of the water heater and damage resulting from scale is not covered under warranty. Refer to section7.3 for detailed instructions on descaling the heat exchanger C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 36: Winterizing For Seasonal Use

    • Inspect heat exchanger fincoil for soot build-up or blockage. To commercial descalant, refer to manufacturer's instructions for proper access fincoil, consult service bulletin at www.bosch-climate.us. If dilution ratio. there is evidence of soot build-up or blockage, the heat exchanger ▶...
  • Page 37: Adjusting Co2

    ▶ One factor that may affect CO levels is improper gas pressure. Please see Chapter 4.14 for the procedure to measure gas pressure and record your findings below: Static Gas Pressure: “ WC P1 Operating Pressure: “ WC C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 38: Program Values

    4. Press ON/OFF button to turn OFF the heater and then turn ON the heater. 5. Heater is ready for normal operation. 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 39: Control Board Diagnostics

    “P” - button Cascading type This menu is only available when cascade mode is selected CC. Contact Bosch Water Heating for details. Primary/Secondary mode Table 34 Program values, factory default settings and ranges. Control board diagnostics Diagnostic menu 1.
  • Page 40: Troubleshooting

    It is recommended to use “Control board diagnostics” page 39, chapter 5. Clean inlet filter screen per chapter 4.9, page 27. 7.7 as a tool for problem solving. If the display is showing a blinking two digit code, refer to this section. 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 41: Water Is Too Hot

    The end result is nothing supplied. See fig. 2, page 8 for location of rating plate. but cold water coming out of the outlet. Consult www.bosch- 5. Avoid restrictive outlets. Clean all shower heads and faucet aerators.
  • Page 42: Noisy Burner/Heater During Operation

    6. Verify proper CO readings per chapter 7.5, page 37. CO adjustments must be done by a certified gas technician with a calibrated combustion gas analyzer. 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 43: Problem Solving

    (Status message, not an error). desired output temperature. 3. Check supply voltage. It must be 120VAC and properly grounded. 4. Possible defective control unit call Bosch Water Heating for further instructions. Table 39 * By installer or service technician only.
  • Page 44 83, page 59. 2. Check supply voltage. It must be 120VAC and properly grounded. 3. Possible defective component in fan or defective control unit call Bosch Water Heating for further instructions.
  • Page 45 See chapter 4.3, page 11. 4. Call Bosch Water Heating for further instructions. Overheat sensor (ECO) open circuit (resets 1. Disconnect power supply cord and check wire connections on the overheat when cooler temperatures are detected sensor (fig.
  • Page 46 GPM. Measure voltage at the gas valve wire plug connection. The voltage should measure 24VDC between the left pair of wires and 24VDC between the right pair of wires when the unit is operating. If voltage is not proper, contact Bosch Water Heating for further instruction.
  • Page 47: Electrical Diagram

    [12] Water valve [13] Primary fan [14] ON/OFF switch [15] Secondary fan [16] Power supply cord [17] Power connection [18] Ignition electrodes [19] Ground post [20] Antifreeze kit connection [21] Fuse [22] Fuse C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 48: Sensor Resistance Charts

    48 | Sensor resistance charts Sensor resistance charts Fig. 72 Outlet sensor characteristics Fig. 73 Inlet sensor characteristics 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 49 Sensor resistance charts | 49 Fig. 74 C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 50: Functional Scheme

    WF < 0.45 gpm ± 0.05 gpm WF < 0.45 gpm ± 0.05 gpm (WF < 1.7 l/min ± 0.2 l/min) (WF < 1.7 l/min ± 0.2 l/min) Water flow procedure Fig. 75 Functional scheme 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 51: Interior Components Diagram And Parts List

    LCD display [18] Control unit On/Off button [19] Up button Reset button [20] Down button Program key [21] LED [10] Flue gas limiter [11] Heat exchanger overheat sensor (ECO) [12] Ignition electrodes C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 52 52 | Interior components diagram and parts list Fig. 77 Appliance overview 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 53: Components Diagram

    8 705 504 154 0 Observation window 8 705 600 003 0 Mounting bracket 8 701 309 164 0 Holding bracket 8 708 104 103 0 Table 40 Screw 8 703 403 012 0 Table 40 C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 54 54 | Interior components diagram and parts list 13.2.2 Group 2 Fig. 79 Components Diagram 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 55 8 705 202 141 0 Condensate drain pipe 8 700 703 177 0 Condensate drain pipe clip 8 716 102 607 0 Condensate drain pipe O-ring 8 704 701 094 0 Table 41 C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 56 Fan mount nut 2 915 011 006 0 Table 42 Secondary fan 8 707 204 082 0 Screw 8 703 403 012 0 Gas / Air Mixer 8 705 700 170 0 Table 42 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 57 8 700 507 002 0 Gasket 8 704 701 107 0 Gas / Fan connector 8 705 202 140 0 Washer 8 704 701 062 0 Regulation screw 8 703 404 220 0 Table 43 C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 58 8 700 507 081 0 Cover 8 738 702 550 0 Wire form spring 8 704 705 029 0 O-ring 8 700 205 312 0 O-ring 8 700 205 157 0 Table 44 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 59 Printed circuit transceiver (optional) 8 708 300 123 0 Fan cables 8 704 401 347 0 Wire harness 8 704 401 348 0 Table 45 Electrode cables 8 704 401 346 0 Table 45 C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 60: Protecting The Environment

    ▶ Define the temperature you want, in the appliance or with the remote control. This way you have the precise water flow needed (mixing cold water to regulate temperature will increase the water flow with consequent waste of water). 6 720 644 887 (2013/02) C 1210 ES/ESC...
  • Page 61: Limited Warranty For Bosch Therm And Greentherm Tankless Water Heaters | 61

    Water Heater. If year from the date of original installation, provided it is installed and this action is not possible or you don't receive a response, contact Bosch properly maintained by a qualified heating contractor and the other Thermotechnology Corp., 50 Wentworth Avenue, Londonderry, NH...
  • Page 62: Limited Warranty For Bosch Therm 1210 Esc Tankless Water Heaters

    Water Heater. If SERVICE LABOR COSTS this action is not possible or you don't receive a response, contact Bosch This warranty provides labor costs, at BTC approved rates, for one (1) Thermotechnology Corp., 50 Wentworth Avenue, Londonderry, NH year from the date of original installation, provided it is installed and 03053.
  • Page 63: Installer Checklist To Be Completed By Installer Upon Installation

    Table 46 1) See Chapter 4.14, page 31 and gas pressure table (to be filled out by installer) Installation manual should be left with the owner after the installation is tested and completed. C 1210 ES/ESC 6 720 644 887 (2013/02)
  • Page 64 6720644887...

This manual is also suitable for:

C 1210 esC 1210 esc