Bosch 520PN Applications Manual
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Bosch 520PN Applications Manual

Greentherm & thermtankless water heaters
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Addendum No. 1
Pre-Bid Meeting 8/26/2014
Attendance – See attached sign in sheet
Will Preneta reviewed the scope of work
Questions/Answers
1. There will be a dumpster on site for scrap metal supplied by the County
2. Vent kit supplied by the County and vent piping from the kits through the
roof has to be purchased by the contractor
3. Water manifold connections need to be identical in size and length
4. Electrical disconnect needs to be provided for each rack
5. Pumps require a fusable disconnect
6. Materials list (see below)
Materials List – Provided by the Owner (the vent pipe is for part number ref only
for contractors)
Quantity
Catalog Nbr
14
9W894N
13
5W650LF
1
5H966C
4
2113418
4
276094
4
2113417
4
2760195
3
7736501253
Wicomico County Purchasing
125 N. Division St. Room B-3
Salisbury, MD 21801
Ph. 410-548-4805 Fax 410-334-3130
Addendum # 1
Tankless Water Heater System Installation
Description
C1210 ES C NG Tankless Water Heater
44443wpr ISO valve sets for water heaters
M3ST120R5A Storage tank ASME
Stratos Z 1.25 X 3-3.5 Wilo pump
1 1/2 FPT Flange Kit
Recirculation pump strato 1.25 X 3X2.5 Wilo
1 1/2 flanges
back to back vent kit starter
1
Date: 8/29/2014

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  • Page 1 Addendum No. 1 Wicomico County Purchasing 125 N. Division St. Room B-3 Salisbury, MD 21801 Ph. 410-548-4805 Fax 410-334-3130 Date: 8/29/2014 Addendum # 1 Tankless Water Heater System Installation Pre-Bid Meeting 8/26/2014 Attendance – See attached sign in sheet Will Preneta reviewed the scope of work Questions/Answers 1.
  • Page 2 Addendum No. 1 7736501252 additional back to back vent pipe 7736501100 side by side for kitchen venting 773650119 roof termination 7736501133 80" vent pipe (Contractor Supplied) 7736501135 40" vent pipe (Contractor Supplied) 7736501137 20" vent pipe (Contractor Supplied) 7736501132 90' vent elbow (Contractor Supplied) 7709003962 cascade wire connection wb2stand...
  • Page 3 Drawings are not to scale. Refer to the appliance and accessory installation manuals for additional detailed information! GREENTHERM & THERM Tankless Water Heaters C1210ES/ESC, C1050ES, C950ES, 940ES, 940ESO, 830ES, 520HN, 520PN, 330PN Applications Manual...
  • Page 4 Applications Manual 2 | THERM/GREENTHERM Tankless Water Heaters Data subject to change Bosch Thermotechnology Corp.

  • Page 5: Table Of Contents

    11.1 Booster applications 12 Commercial Solar Applications 13 Commercial Water Heating Applications 13.1 Commercial Kitchen applications 13.2 Tank loading with domestic hot water recirculation 13.3 Advanced tank loading commercial hot water system 13.4 Common Venting Bosch Thermotechnology Corp. Data subject to change...

  • Page 6: Explanation Of Symbols

    Important information in cases where there is no risk of personal injury or material losses is identi- ed by the symbol shown on the left. It is bordered by horizontal lines above and below the text. Data subject to change Bosch Thermotechnology Corp.

  • Page 7: Introduction

    The following are certi cation stamps and explanations of the most common applications of the Bosch Therm that are speci c to one or more Bosch tankless water tankless water heaters. Application drawings are shown heaters. These certi cations bring the appliances in ac-...

  • Page 8: Tankless Water Heater Accessories

    Part number 520 HN 520 PN 330 PN Freeze prevention kit 7709003775 ¥ ¥ ¥ Isolation valve kit with PRV ES ISO KIT ¥ ¥ ¥ Power vent w/back draft apper ¥ ¥ Data subject to change Bosch Thermotechnology Corp.

  • Page 9: Pump Sizing For Circulation

    Maximum flow allowed for mini-tank DHW recirculation is 2 GPM. 5.1 Pressure drop curves C 950 ES C 1210 series 830 ES, C 1050 ES 940 ES / ESO Flow (GPM) igure 1 Pressure drop curves Bosch Thermotechnology Corp. Data subject to change...

  • Page 10: Domestic Hot Water Circulation

    0.02 0.03 " Pex 0.53 0.04 0.06 " Pex If the Bosch tankless water heater provides the ½ 0.12 0.18 " Pex heat source for recirculated water , the heat exchanger warranty is decreased. Please refer Source: 2009 International Plumbing Code to the installation manual for detailed warranty period information.

  • Page 11: Tank Loading

    * Calculations based on 120°F Set-point temperature, 107°F shower temperature, 2.5 GPM showerhead ow rate, 1.5 GPM sink ow rate, adequate water pressure and gas supply. Variation from these parameters may alter performance. GPM shown is the hot water ow rate at 120°F Set-point temperature. Bosch Thermotechnology Corp. Data subject to change...

  • Page 12: Water Heater Sizing & Speci Cations

    1 0 | THERM/GREENTHERM Tankless Water Heaters 6 Water Heater Sizing & Speci cations This section describes the water heaters available from Bosch Thermotechnology Corp. and provides a general ˚F overview to the speci cations of each particular model. 77˚...
  • Page 13 Temperature rises above 110 °F or more, or output temperatures above 140 °F require either a commercial unit or optional accessories such as a high temperature kit. Bosch Thermotechnology Corp. Data subject to change...

  • Page 14: Tankless Water Heater Speci Cations

    (Schedule 40) 100-140°F 100-140°F 100-140°F 100-140°F 100-140°F 100-180°F 100-184°F 100-184°F 100-184°F 100-184°F 100-184°F (ESC) Temperature range °F 100-140°F (requires HT (requires HT (requires HT (requires HT (requires HT (ES) kit) kit) kit) kit) kit) Data subject to change Bosch Thermotechnology Corp.
  • Page 15 AQ4 not allowed vent kit vent kit Venting diameter Inches Type B-vent Type B-vent Type B-vent Vent material recommended recommended recommended Temperature range °F High to low High to low High to low Bosch Thermotechnology Corp. Data subject to change...

  • Page 16: Water Quality

    If water quality exceeds one or more of the values speci ed below, Bosch recommends installing a water conditioner or softener. If the tankless water heater is operating in applications where the outlet temperature exceeds 140°F, a water softening system is strongly...

  • Page 17: Applications Legend

    All work pertaining to the installation shall be in full compliance with all legal requirements, including national and local codes. Best installation practices should be followed. Bosch Thermotechnology Corp. Data subject to change...
  • Page 18 9 Domestic Water Heating Applications Potable water Potable water is water that is suitable for drinking. Bosch Thermotechnology Corp. appliances are approved to heat potable water only. Heating any other liquid other than po- table water will void the manufacturer’s warranty covering the appliance.

  • Page 19: Low Volume Applications

    THERM/GREENTHERM Tankless Water Heaters | 17 9.1 Low volume applications Low volume applications cover the small applications in Applicable models: Bosch 330 PN, 520 PN, 520 HN. which a large water heater would be inef cient. Common applications for these appliances include cottages, cabins, and summer camps.

  • Page 20: Whole House Applications

    (page 9) to determine the best Bosch water heater model for your application. An enhanced design combining an Ariston mini tank in line after the Bosch water heater will reduce wait times and improve temperature stability. 9.2.1 Bosch gas water heater...
  • Page 21 9.2.2 Bosch gas water heater with buffer tank Applicable models: Bosch 520 PN, 520 HN, 830 ES, Below is an example of a Bosch gas tankless water heater 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES.
  • Page 22 Insulate piping in hot water Applicable models: Bosch 520 PN, 520 HN, 830 ES, recirculation loop to limit heat loss. 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES, Mini tank: Bosch Tronic 3000T ES8.
  • Page 23 Please refer to the installation manual for detailed warranty period information. Applicable models: Bosch 830 ES, 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES. Bosch Thermotechnology Corp. Data subject to change...

  • Page 24: High Volume Potable Water Heating

    Potable water mercial applications. Use of the Intelligent Cascading Kit , Potable water is water that is suitable for drinking. Bosch unlike other parallel applications, maintains the activation Thermotechnology Corp. appliances are approved to heat ow rate of a single appliance.
  • Page 25 For applications with 200ft of pipe or more. balancing pressures between the appliances. Applicable models: Bosch 830 ES, 940 ES, 940 ESO, Locate appliances close together for improved C 950 ES, C 1050 ES, C 1210 ES performance.
  • Page 26 For applications with 200ft of pipe or less. balancing pressures between the appliances. Applicable models: Bosch 830 ES, 940 ES, 940 ESO, Locate appliances close together for improved C 950 ES, C 1050 ES, C 1210 ES performance.

  • Page 27: Parallel Unit Applications

    Applications Manual THERM/GREENTHERM Tankless Water Heaters | 25 10.2 Parallel unit applications Two Bosch water heaters plumbed in parallel will have Applicable models: Bosch 830 ES, 940 ES, 940 ESO, double the ow rate. However, the activation rate C 950 ES, C 1050 ES, C 1210 ES.

  • Page 28: Residential Solar Applications

    C 1050 ES, C 1210 ES * If local codes require higher setpoint or to increase the recovery capacity of the water heater, contact Bosch Thermotechnology. See Chapter 5.2 for recirculation pump parameters Data subject to change Bosch Thermotechnology Corp.

  • Page 29: Booster Applications

    Thermostatic valve 2 acts as a tempering valve that brings potentially hot water temperatures down to a level that is safe for the inhabitants Applicable models: Bosch 830 ES, 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES. Bosch Thermotechnology Corp.
  • Page 30 See Chapter 5.2 for recirculation pump parameters Applicable models: Bosch 830 ES, 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES. Data subject to change...

  • Page 31: Commercial Solar Applications

    (e.g. schools, tness centers). For additional system details, consult the Bosch Solar Technical Guide. See Chapter 5.2 for recirculation pump parameters Applicable models: Bosch 830 ES, 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES. Bosch Thermotechnology Corp.

  • Page 32: Commercial Water Heating Applications

    Applications Manual 3 0 | THERM/GREENTHERM Tankless Water Heaters 13 Commercial Water Heating Applications Introduction This section gives a general overview of high volume, high temperature water heating for commercial applications. Data subject to change Bosch Thermotechnology Corp.

  • Page 33: Commercial Kitchen Applications

    13.1.1 Commercial kitchen with domestic hot water commercial dishwasher, a hot water circulation loop is recirculation recommended. Applicable models: Bosch 830 ES, 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES, C 1210 ESC. See Chapter 5.2 for recirculation pump parameters...

  • Page 34: Tank Loading With Domestic Hot Water Recirculation

    Do not use the Intelligent Cascading Kit in tank loading applications. See Chapter 5.2 for recirculation pump parameters Applicable models: Bosch 830 ES, 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES, C 1210 ESC. supply...

  • Page 35: Advanced Tank Loading Commercial Hot Water System

    Applicable models: Bosch 830 ES, 940 ES, 940 ESO, C 950 ES, C 1050 ES, C 1210 ES, C 1210 ESC. Bosch Thermotechnology Corp.

  • Page 36: Common Venting

    100' (30m) between the last appliance and the termination. Equivalent length for — 90° Elbow: 80" — 45° Elbow: 40" Data subject to change Bosch Thermotechnology Corp.
  • Page 37 Wall Clamp DIA4" 7736501256 Wall Clamp DIA6" 7736501255 Flat Roof Flashing DIA6" 7736501095 PP Extension DIA4" 305 QF 7736501097 Steep Roof Flashing 0-25Ý DIA6" 7736501093 Steep Roof Flashing 25-45Ý DIA6" 7736501091 Wall Bracket DIA6" 7736501113 Bosch Thermotechnology Corp. Data subject to change...
  • Page 38 Schematic shows both vertical and horizontal setup. 45° and 90° elbows can be used as needed. The vent pipe must over its full length be sloped toward the water heaters and low points are not permitted. Data subject to change Bosch Thermotechnology Corp.
  • Page 39 Applications Manual THERM/GREENTHERM Tankless Water Heaters | 37 Side by side con guration Back to back con guration Bosch Thermotechnology Corp. Data subject to change...
  • Page 40 Applications Manual 3 8 | THERM/GREENTHERM Tankless Water Heaters Data subject to change Bosch Thermotechnology Corp.
  • Page 41 Applications Manual THERM/GREENTHERM Tankless Water Heaters | 39 Bosch Thermotechnology Corp. Data subject to change...
  • Page 42 United States and Canada Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053 Tel: 866-330-2730 Fax: 603-965-7581 www.bosch-climate.us BTC 740001301 E / 03.2013...
  • Page 43 Exhibit B 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.
  • Page 44 Use of optional remote control accessory 16 LIMITED WARRANTY FOR BOSCH THERM 1210 ESC TANKLESS (part no. TSTAT2) ......34 WATER HEATERS .

  • Page 45: 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 46 4 | Key to symbols and safety instructions Danger from 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 power supply. Risk of scalding at the hot water draw-off point ▶...
  • Page 47 Key to symbols and safety instructions | 5 For your safety NOTICE: ▶ Do not store or use gasoline or other flammable, combustible or ▶ If a water heater is installed in a closed water supply corrosive vapors and liquids in the vicinity of this or any other system, such as one having a backflow preventer in appliance.

  • Page 48: 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 49: 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) Natural Gas...

  • Page 50: Unpacking The Heater

    ▶ Lift front cover panel upward and remove. • Exhaust vent adaptor (with 4 screws and gasket provided) • Combustion air inlet adaptor (with 3 screws and gasket provided) • Installation manual (manual can be downloaded at www.bosch- climate.us) • Product registration card •...

  • Page 51: General Rules To Follow For Safe Operation

    Appliance details | 9 3.3.3 Remove combustion cover (service only; unplug appliance • 8. Should overheating occur or the gas supply fail to shut off, turn off before removing cover) 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 ▶...

  • Page 52: 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 53: 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 54 12 | Installation instructions 4.3.1 Vent material All combustion air and vent pipe materials and fittings must comply with the following: Item Material United States Canada Vent or PVC schedule 40 ANSI/ASTM D1785 CSA or ULC air pipe certified only PVC-DWV ANSI/ASTM D2665 (ULC-S636)
  • Page 55 Installation instructions | 13 4.3.2 Vent specifications Use of elbows Establish vent clearances that comply with the vent manufacturer's It is recommended to limit the amount of elbows used in the exhaust and specifications and all applicable national/local codes. combustion air piping to reduce friction in the air flow. The following lists the maximum amount of 90°...
  • Page 56 14 | Installation instructions Calculation example for 4" venting: Exhaust System used Twin pipe Number of 90° elbows needed: Number of 45° elbows needed: Table 15 Calculation of example Max. length 63’ 90° elbow reduction - 2.5’ sub-total = 61.5’ 45°...
  • Page 57 Installation instructions | 15 Required direct vent terminal clearances (twin pipe / concentric penetration) Fig. 9 Canadian installations U.S. installations Clearance above grade, veranda, porch, deck or balcony 12 in. 12 in. Clearance to window or door that may be opened 36 in.
  • Page 58 16 | Installation instructions Required other than direct vent terminal clearances (single pipe penetration) Fig. 10 Canadian installations U.S. installations Clearance above grade, veranda, porch, deck or balcony 12 in. 12 in. Clearance to window or door that may be opened 36 in.
  • Page 59 Installation instructions | 17 4.3.3 Vent configuration examples WARNING: Below are approved examples of vertical and horizontal venting ▶ Single pipe penetration should be used in non- installations. freezing climates only and steps must be taken to ensure that adequate combustion air is available to the water heater at all times! Fig.
  • Page 60 18 | Installation instructions ▶ Attach the combustion air inlet accessory to the top of the unit fig. 17 (position 2) using the 3 screws and gasket provided, and install 3" air intake pipe over the accessory. Fig. 17 Inlet connection Fig.
  • Page 61 Installation instructions | 19 4.3.6 Freeze prevention In cold climates, components of a tankless water heater can freeze and burst from negative draft. A leading cause of negative draft is combustion appliances in the building not being supplied with sufficient combustion air.
  • Page 62 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 63 Installation instructions | 21 4.3.7 Fan speed adjustment First calculate the total equivalent vent length. This is the straight pipe length of both exhaust and combustion air plus the number of elbows ! IMPORTANT INFORMATION: used. To determine the length equivalency of each elbow refer to tables Natural gas heaters with installation altitudes below 2,000 ft above sea 8 and 9.
  • Page 64 22 | Installation instructions Adjusting minimum power fan speed (P2) Adjusting maximum power fan speed (P1) To select fan speed: To select fan speed: ▶ Press ON/OFF button into ON. ▶ Press ON/OFF button into ON. ▶ Press and hold simultaneously buttons for 3 ▶...

  • Page 65: Combustion Air Requirements

    Installation instructions | 23 Combustion air requirements – 1000 BTU/hr (292.81 Watts) if all air is taken from inside the building CAUTION: – 2000 BTU/hr (585.62 Watts) if all air is taken from the outside by horizontal ducts ▶ In areas where outside temperatures routinely come close to freezing, sealed combustion operation is –...

  • Page 66: Gas Piping & Connections

    24 | Installation instructions Front cover should be removed (see instructions on page 8) 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.
  • Page 67 Installation instructions | 25 In Canada: The Installation must conform to CGA B149 INSTALLATION the line, size the gas line according to the total maximum amount of BTU CODES and/or local installation codes. draw input rating of for all appliances combined. Note: Undersizing the gas line may result in diminished hot water flow WARNING: rate and temperature.
  • Page 68 26 | Installation instructions 4.8.1 FOR NATURAL GAS Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop of 0.3” in Water Column (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”...

  • Page 69: 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 70: Filling The Condensate Trap

    28 | Installation instructions ▶ Remove the clip and disconnect the drain tube, see fig. 35. Fig. 35 Disconnect drain tube ▶ Fill the condensate trap by pouring approx.14 oz. (400ml) of water into the top of the drain tube. To avoid damage to the appliance use a funnel in this operation, see fig.

  • Page 71: 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 72 30 | Installation instructions C1210ES\ESC 6720644887-01.1V Flow (GPM) Fig. 40 Pressure drop curve 6720644887-02.1V Fig. 41 Space heating diagram Hot water outlet [12] Thermometer (optional) Cold water inlet [13] DHW outlet Pressure relief valve [14] Water to water heat exchanger Gas supply [15] Backflow preventer Shut off gas valve...

  • Page 73: Measuring Gas Pressure

    Electrical connections | 31 4.14 Measuring gas pressure ▶ Operate all other gas appliances (except heater) on same gas piping system at maximum output. Confirm gas pressure upon installation. ▶ Turn on high volume of hot water flow (at least 6 gpm) and burner will Connecting manometer light.

  • Page 74: Position Of The Fuses In Control Unit

    32 | Operation instructions ▶ Remove the six screws from the back cover of the control unit, see fig. 46, pos. 2. ▶ Check the fuses in the printed circuit board, see fig. 46, pos. 3. 6720608643-15.1AL Fig. 44 Connecting power supply cord Power cord length: 3ft.

  • Page 75: For Your Safety Read Before Operating Your Water Heater

    Operation instructions | 33 For your safety read before operating your water heater WARNING: ▶ If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance is equipped with electronic ignition for lighting the main burner.

  • Page 76: Use Of Optional Remote Control Accessory (Part No. Tstat2)

    34 | Operation instructions Setting the water temperature Use of optional remote control accessory (part no. TSTAT2) The desired temperature of the hot water can be adjusted on the front control panel of the heater. The water heater has an electronically controlled gas valve that modulates the burner input in response to both varying hot water flow rates and/or changes in any incoming and outgoing water temperatures.

  • Page 77: Program Button

    Maintenance and service | 35 After following instructions indicated in “Troubleshooting” section, Maintenance and service ▶ press reset button firmly in order to return heater to normal operation. WARNING: ▶ Always shut off the electrical power supply, shut off the manual gas valve and shut off the water valves whenever servicing.

  • Page 78: 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 79: Adjusting Co2

    Maintenance and service | 37 Condensing heat exchanger unit maintenance; The P1 minimum operating gas pressure is 3.5" WC for Natural Gas and 8" WC for Propane. Do not proceed in adjusting CO until pressure is at ▶ Shut off power. Disconnect power cord. or above these levels, but not to exceed 10.5"...

  • Page 80: Program Values

    38 | Maintenance and service Max. CO level range (%) (measured) Nat. Gas max. input 8.3 % - 8.9 % < 290 ppm min. input 2.1 % - 2.4 % < 60 ppm LP Gas max. input 9.9 % - 10.5 % <...

  • Page 81: 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 82: Troubleshooting

    40 | Troubleshooting Example: Diagnostic menu Calculation of number of working hours, 9th most recent error Working hours 10th most recent error Number in H0 60 + Appliance type - Cd (Condensing) Number in H1 5 (X 100) = 500 + Appliance type - nC (Non condensing) Number in H2 0 (X 10 000) =...

  • Page 83: 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 84: Noisy Burner/Heater During Operation

    42 | Troubleshooting Noisy burner/heater during operation 1. Sealed combustion leak. Make sure combustion cover is securely fastened. Ensure the exhaust vent adaptor is properly sealed with supplied gasket. Leaky seals create improper combustion resulting in noise. 2. Improper venting. Venting that is unsealed, the wrong material, too big in diameter or too long in run will result in unstable burner flames and noise.

  • Page 85: 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 86 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 87 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 88 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 89: Electrical Diagram

    Electrical diagram | 47 Electrical diagram Fig. 71 Electrical scheme Inlet water temperature sensor Outlet water temperature sensor Backflow temperature sensor Cascading output connection Cascading input connection Ionization sensor Water flow sensor Flue gas limiter Heat exchanger overheat sensor (ECO) [10] Gas valve [11] Exhaust temperature sensor [12] Water valve...

  • Page 90: 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 91 Sensor resistance charts | 49 Fig. 74 C 1210 ES/ESC 6 720 644 887 (2013/02)

  • Page 92: Functional Scheme

    50 | Functional scheme Functional scheme IDLE Water flow > 0.5 gpm water tap See error code table (> 1.9 l/min) open? (see WF calc.) Fan speed = correct Ionization = off Appliance Temp. limiter = closed ready to start? Temp.

  • Page 93: Interior Components Diagram And Parts List

    Interior components diagram and parts list | 51 Interior components diagram and parts list 13.1 Interior components Fig. 76 Components Exhaust temperature sensor [13] Observation window Condensing heat exchanger [14] Backflow temperature sensor Heat exchanger [15] Secondary air fan Ionization sensor [16] Gas valve Primary fan (Mixer) [17] Condensate trap...
  • Page 94 52 | Interior components diagram and parts list Fig. 77 Appliance overview 6 720 644 887 (2013/02) C 1210 ES/ESC...

  • Page 95: Components Diagram

    Interior components diagram and parts list | 53 13.2 Components diagram 13.2.1 Group 1 Fig. 78 Components Diagram Item Description Reference Item Description Reference Combustion cover clip 8 701 201 032 0 Front cover 8 705 431 412 0 Grommet set 8 710 203 039 0 Cover shield 8 705 506 906 0...
  • Page 96 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 97 Interior components diagram and parts list | 55 Item Description Reference Heat exchanger 8 705 406 419 0 Heat exchanger top gasket 8 704 701 052 0 Condensing exchanger inlet 8 705 700 159 0 Overheat sensor (ECO) 8 707 206 204 0 Heat exchanger bottom gasket 8 704 701 054 0 Site window...
  • Page 98 56 | Interior components diagram and parts list 13.2.3 Group 3 Fig. 80 Components Diagram Item Description Reference Item Description Reference Venturi 8 700 306 226 0 Main burner (Natural Gas) 8 708 120 650 0 O-ring 8 700 205 224 0 Main burner (LP Gas) 8 708 120 673 0 Mixer / Fan gasket...
  • Page 99 Interior components diagram and parts list | 57 13.2.4 Group 4 Fig. 81 Components Diagram Item Description Reference Item Description Reference O-ring 8 700 205 009 0 Gas valve 8 707 021 019 0 Screw 2 910 149 181 0 Pressure tapping 8 703 404 219 0 Table 43...
  • Page 100 58 | Interior components diagram and parts list 13.2.5 Group 5 Fig. 82 Components Diagram Item Description Reference Item Description Reference Temperature sensor 8 700 400 042 0 Water valve with engine 8 708 505 023 0 O-ring 8 700 205 310 0 O-ring 8 700 205 147 0 Connection bush...
  • Page 101 Interior components diagram and parts list | 59 13.2.6 Group 6 Fig. 83 Components Diagram Item Description Reference Item Description Reference Flue gas limiter 8 700 400 032 0 Control unit - C 1210 ES 8 707 207 367 0 Kit Intelligent Cascading 7 709 003 962 Control unit - C 1210 ESC...

  • Page 102: Protecting The Environment

    60 | Protecting the environment Protecting the environment Packing The packing box may be fully recycled as confirmed by the recycling symbol Components Many parts in the heater can be fully recycled in the end of the product life. Contact your city authorities for information about the disposal of recyclable products.

  • Page 103: 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 104: 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 105: Installer Checklist To Be Completed By Installer Upon Installation

    Installer Checklist to be completed by installer upon installation | 63 Installer Checklist to be completed by installer upon installation Serial Number ___ ___ ___ ___ ___ ___ ___ ___ (8 digit serial number is located on rating plate on right side panel) Gas Pressure Reading Static...
  • Page 106 6720644887...
  • Page 107 Exhibit C _______________________________END___________________________________...

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