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Bosch GWH 715 ES Applications Manual

Tankless and point-of-use water heaters applications manual.
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Applications manual
For tankless and point-of-use water heaters

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   Summary of Contents for Bosch GWH 715 ES

  • Page 1

    Applications manual For tankless and point-of-use water heaters...

  • Page 2

    Bosch applications manual BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 3: Table Of Contents

    5 Pump Sizing 5.1 Pressure drop curves 5.2 Domestic hot water circulation 5.3 Tank loading 6 Bosch Water Heating Models & Specifi cations 6.1 Sizing tankless water heaters 6.2 Outdoor Installation 6.3 Bosch gas tankless water heater specifi cations 6.4 Bosch electric tankless water heater specifi cations 2.5 Ariston electric mini-tank water heater specifi...

  • Page 4: Introduction

    1 Introduction The Bosch Applications Manual is intended to present some of the most common applications of the Bosch line of tankless and point of use water heaters. Application drawings are shown with both piping and corresponding electrical schematics where applicable. Auxiliary equipment depicted does not necessarily represent any one Certifi...

  • Page 5: Bosch Water Heater Accessories

    Bosch applications manual 3 Tankless Water Heater accessories See Table 1 for available accessories for the Bosch line of tankless water heaters. NOTE: Only models that have accessories available are listed in the table below. Available accessories Table 1 715 ES...

  • Page 6: Pump Sizing

    If the inlet water fi lter, when removed, contains debris install a Y-strainer (installer supplied) on the cold water inlet. 5.1 Pressure drop curves GWH C 800 ES GWH C 920 series GWH 715 ES Flow (GPM) BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 7: Domestic Hot Water Circulation

    Aquastat setpoint. Example: Tankless water heater setpoint = 122°F Aquastat setpoint = 108°F Keep hot water piping insulated to limit heat loss. Set temperature on the GWH 920 ESC must not exceed 140°F. BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 8: Bosch Water Heating Models & Specifi Cations

    Bosch applications manual 6 Bosch Water Heating Models and Specifi cations This section describes the water heaters available from Bosch Thermotechnology Corporation and provides a general overview to the specifi cations of that particular model. More detailed information is contained in the installation manuals. Download these manuals at www.BoschPro.com.

  • Page 9

    GWH 260 PN/HN Degree rise (°F) Gas Appliance Sizing Chart RP27PT RP17PT RP17PT RP12PT RP12PT RP7P RP3P RP1P RP9P Degree rise (°F) Electric Appliance Sizing Chart Note: Maximum flow rates dependent on site conditions BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 10: Outdoor Installation

    ≥ 3 ft pipework, eaves or overhang ≥ 1 ft Above ground From a gas meter or gas ≥ 5 ft regulator Outdoor Installation Clearances Source: NFPA 54 National Fuel Gas Code ANSI Z223.1 BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 11: Bosch Gas Tankless Water Heater Specifi Cations

    C 920 ESC (commercial model) has a maximum setpoint temperature of 180°F. Note: For specifi cations and details on the Bosch GWH 345 ESR and GWH 450 ESR models, see the GWH 345 ESR and GWH 450 ESR applications manual.

  • Page 12: Bosch Electric Tankless Water Heater Specifi Cations

    1 2 | Bosch applications manual 6.4 Bosch Electric Tankless Water Heater Specifi cations Technical Specifi cations Model RP1P RP2P RP3P RP7P RP9P RP12PT RP17PT RP27PT Volts Kilowatts 9.50 6.00 3.40 7.20 9.50 12.00 17.25 26.85 Amps U.S.A: 80 U.S.A: 120...

  • Page 13: Domestic Water Heating Applications

    | 13 7 Domestic Water Heating Applications Potable water Potable water is water that is suitable for drinking. Bosch Water Heating appliances are approved to heat potable water only. Heating any other liquid other than potable water will void the manufacturer’s warranty covering the appliance.

  • Page 14

    Temperature and pressure relief valve Sink Flow direction Ariston Pro GL8 Ti Service valve Drain pan Note: Drawing is not to scale. Cold water piping to fixtures not shown for clarity purposes. BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 15

    RP1P, RP2P, RP3P, Symbols RP7P, RP9P Service valve Sink Flow direction Note: Drawing is not to scale. RP12PT cannot be mounted sideways. Cold water piping to fixtures not shown for clarity purposes. BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 16: Whole House Applications

    7.2.1 Low volume tankless water heater applications The Bosch GWH 260 PN gas tankless water heater and the RP17PT electric tankless water heater offer a compact and lightweight design for easy installation.

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    RP27PT Cold Symbols Standard tub fixture Pressure & Flow temperature direction relief valve Service Sink Note: valve Drawing is not to scale. Cold water piping to fixtures not shown for clarity purposes. BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 18

    3 bathrooms) Service Potable water Sink Aquastat Standard valve expansion tank tub fixture Note: Drawing is not to scale. Cold water piping to fixtures not shown for clarity purposes. BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 19

    | 19 7.2.4 Bosch ProTankless gas water heater Below are two examples of Bosch ProTankless gas water heater installations for the whole house. One example shows an Ariston mini tank in line for reduced hot water wait time and increased temperature stability.

  • Page 20

    2 0 | Bosch applications manual 7.2.5 Bosch ProTankless gas water heater with domestic recirculation loop The circulator should be controlled by an external aquastat or with a See Chapter 5.1 for recirculation pump parameters timer to run only during times of expected hot water usage.

  • Page 21

    Bosch applications manual | 21 7.2.6 Bosch ProTankless gas water heater with direct recirculation loop Use a circulator, aquastat and/or timer, to keep a loop of hot water constantly hot and ready to use. This limits wait time for hot water delivery to the tap and excessive waste of water.

  • Page 22: High Volume Potable Water Heating

    8 High Volume Potable Water Heating Potable water Potable water is water that is suitable for drinking. Bosch Water Heating appliances are approved to heat potable water only. Heating any other liquid other than potable water will void the manfucturer’s warranty covering the appliance.

  • Page 23: Cascading Unit Applications

    Master appliance, a signal is sent to one or more of the Slave appliances to begin operation. See Chapter 5.1 for recirculation pump parameters Bosch GWH 715 ES, Bosch GWH C 800 ES, or Bosch GWH C 920 ES/ESC tankless link tankless link...

  • Page 24

    System parameters: • For applications with 200ft of pipe or less. See Chapter 5.1 for recirculation pump parameters Bosch GWH 715 ES, Bosch GWH C 800 ES, or Bosch GWH C 920 ES/ESC tankless link tankless link tankless link...

  • Page 25: Parallel Unit Applications

    Bosch applications manual | 25 8.2 Parallel unit applications Two Bosch ProTankless units will have double the activation rate of a single unit. The activation rate will continue to double with each additional unit added in parallel. Bosch GWH 425 PN,...

  • Page 26: Residential Solar Applications

    Bosch Thermotechnology. Use GWH 715 ES, GWH C 800 ES, or GWH C 920 ES with aquastat that activates circulator. Timer recommended to interrupt reheating during night time.

  • Page 27: Booster Applications

    Honeywell AM101 Thermostatic Valves required for proper increases comfort by buffering DHW temperature. Recommended operation; appliances: Bosch GWH 715 ES, GWH C 800 ES, GWH C 920 ES/ESC Remove check valves from Thermostatic Valve 1 as it is used as a diverter valve;...

  • Page 28

    Remove check valves from Thermostatic Valve 1 as it is used as a increases comfort by smoothing out DHW temperature. diverter valve; Recommended appliances: Bosch GWH 715 ES, GWH C 800 ES. Thermostatic Valve 2 is a tempering valve; Recommended setpoint 120°F for both Valves;...

  • Page 29: Commercial Solar Applications

    Honeywell AM101 Thermostatic Valves required for proper systems in conjuction with solar water heating (e.g. schools, fi tness operation. centers). For additional system details, consult the Bosch Solar For optimal performance, the fl ow through the water heater Technical Guide.

  • Page 30: Commercial Water Heating Applications

    It also provides high temperature water for a commercial dishwasher. When using the super sprayer, hot water draws must be longer than 15 seconds to avoid temperature fl uctuations. Bosch GWH C 920 ESC Sink Dish sprayer...

  • Page 31

    11.1.2 Commercial kitchen with domestic hot water recirculation System parameters: For optimum performance in applications involving a commercial dishwasher, a hot water circulation loop is recommended. See Chapter 5.1 for recirculation pump parameters Cold Water Bosch GWH C 920 ESC Supply Sink Dish sprayer Y-strainer Dishwasher...

  • Page 32: Basic Tank Loading With Domestic Recirculation

    * If local codes require higher setpoint or to increase the recovery capacity of the water heater, contact Bosch Thermotechnology. See Chapter 5.1 and 5.2 for pump parameters Bosch GWH 715 ES, Bosch GWH C 800 ES, Bosch GWH C 920 ES/ESC Domestic Hot Water...

  • Page 33: Advanced Tank Loading Commercial Hot Water System

    * If local codes require higher setpoint or to increase the recovery See Chapter 5.1 and 5.2 for pump parameters capacity of the water heater, contact Bosch Thermotechnology. Bosch GWH 715 ES, Bosch GWH C 800 ES, or Bosch GWH C 920 ES/ESC cold supply cold...

  • Page 34

    3 4 | Bosch applications manual BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 35

    Bosch applications manual | 35 BOSCH THERMOTECHNOLOGY CORPORATION Bosch applications manual | 06.2009...

  • Page 36

    Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053 Tel: 1-866-642-3198 Fax: 1-603-584-1681 www.boschpro.com BTC 710001101 A | 06.2009...

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