Bosch Appliances GWH 260 PN/HN2, GWH 425 PN/HN4GWH 4254 Parallel unit applications, Potable water

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Applications manual

 

 

4 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 manfuctures warranty covering the appliance.

Introduction

This section lays out the options for high volume water heating for large residential and light commercial applications including con- tinuous flows and high volume demands of large home and commercial applications.

4.1 Parallel unit applications

Parallel unit applications have twice the activation rate of single unit applications. The following designs are for continuous flow, high volume hot water needs. Not intended for residential use. To bal- ance flows use reverse return piping. (shown below)

Application manual 11.2007

Bosch Water Heating

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Contents Applications manual Table of Contents Introduction Definitions Sizing by ChartSizing tankless water heaters Rule of thumb sizingGas Appliance Sizing Chart Applications manual GWH 715 ES Installation Clearances FeaturesGWH 715 ES Installation Specifications Installation guidelinesGWH C 800 ES Technical Specifications GWH C 800 ES Installation SpecificationsGWH C 800 ES Installation Clearances Description Min Distances Outdoor Installation for GWH 715 ESGWH C 800 ES GWH 345 ESR Technical Specifications GWH 345 ESR Installation SpecificationsGWH 450 ESR Installation Clearances GWH 450 ESR Installation Specifications GWH 450 ESR Technical SpecificationsGWH 425 EF Technical Specifications GWH 425 EF Installation SpecificationsGWH 425 EF Installation Clearances GWH 425 HN Technical Specifications GWH 425 HN Installation SpecificationsGWH 425 HN Installation Clearances Establish a one-foot rise before any elbowsGWH 425 PN Technical Specifications GWH 425 PN Installation SpecificationsGWH 425 PN Installation Clearances GWH 260 PN Technical Specifications GWH 260 PN Installation ClearancesGWH 260 PN Installation Specifications Electrical requirements Maximum flow rate at given temperature riseTechnical Specifications Powerstream Pro RP1P, RP2P, RP3P, RP7P, RP9P,RP12PT Ariston Pro GL2.5Ti, GL4Ti, GL8Ti Introduction Point-of-use applicationsPotable water Relief valve Temperature and pressureService valve SinkService valve Sink Flow direction Temperature and pressure relief valve Sink Service valves Low flow Flow direction ShowerPowerstream Pro whole house applications Service Sink valvesPowerstream Pro RP17PT or RP27PT Standard tub fixtureHotCold Symbols Bosch ProTankless gas water heaterHot Cold Parallel unit applications Pressure relief valves Bosch GWH 715 ES Bosch GWH C 800 ESCascading unit applications GWH 715 ES and GWH C 800 ES cascadingPressure Bosch GWH 345 ESR Bosch GWH 450 ESR Single unit tank loading application plumbing diagramCold water Feed DHW Single Unit Tank Loading Electrical Diagram ESR control BoardFeed Radiant space heating and DHW plumbing diagramCold water External storage tankRadiant Space Heating and DHW Electrical Diagram Radiant space heating and DHW electrical diagramBosch GWH 345 ESR, Bosch GWH 450 ESR Fan coil space heating and DHW plumbing diagramFan Coil Cold water Fan Coil Space Heating and DHW Electrical Diagram Fan Coil space heating and DHW electrical diagramDrawing # BB OL RevA 10/07 Baseboard Space Heating and DHW Electrical Diagram Drawing # Bbaol RevA 10/07 Pkps Insulate piping Cold water feed Terminal box Baseboard Radiant Panel Back Flow preventerDrawing # EID Bbol CN revA 10/07 Descaling procedure Circulating pump Flow direction Filter Service valves Applications manual Applications manual Applications manual Applications manual BBT North America Corporation