Bosch Appliances GWH 425 PN/HN4GWH 4254, GWH 260 PN/HN2 manual Pressure

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Applications manual

29

 

 

4.3 External storage tank loading applications.

Introduction

This section lays out tank loading options for high volume water heating for large residential and light commercial applications including continuous flows and high volume demands of large home and commercial applications.

4.3.1GWH 345/450 ESR pressure drops and circulator guidelines The maximum amp draw for any circulator connected directly to the appliance must not exceed 1.5 amps

Circulator should be sized by the professional plumbing contractor

Bronze or stainless steel circulators required for all open loop applications

 

50

feet of head

 

 

 

 

 

 

 

40

feet of head

 

 

 

 

 

 

pressure

30

feet of head

 

 

 

 

 

 

 

 

 

 

GWH 345 ESR

 

 

 

20

feet of head

 

 

 

 

 

 

10

feet of head

 

 

 

 

 

 

Inlet

 

 

 

 

 

 

0

feet of head

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 GPM

1 GPM

2 GPM

3 GPM

4 GPM

5 GPM

6 GPM

 

 

 

 

water flow rate

 

 

 

50

feet of head

 

 

 

 

 

 

 

40

feet of head

 

 

 

 

 

 

pressure

30

feet of head

 

 

 

 

 

 

 

 

 

GWH 450 ESR

 

 

 

20

feet of head

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inlet

10

feet of head

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

feet of head

 

 

 

 

 

 

 

 

0 GPM

1 GPM

2 GPM

3 GPM

4 GPM

5 GPM

6 GPM

 

 

 

 

water flow rate

 

 

Pressure drop curves

Note : Flow above 6 GPM is not permitted.

Bosch Water Heating

Applications manual 11.2007

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Contents Applications manual Table of Contents Introduction Sizing tankless water heaters Sizing by ChartDefinitions Rule of thumb sizingGas Appliance Sizing Chart GWH 715 ES Installation Specifications FeaturesApplications manual GWH 715 ES Installation Clearances 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 Technical Specifications GWH 450 ESR Installation SpecificationsGWH 425 EF Technical Specifications GWH 425 EF Installation SpecificationsGWH 425 EF Installation Clearances GWH 425 HN Installation Clearances GWH 425 HN Installation SpecificationsGWH 425 HN Technical Specifications 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 Service valve Temperature and pressureRelief valve SinkService valve Sink Flow direction Sink Service valves Low flow Flow direction Shower Temperature and pressure relief valvePowerstream Pro RP17PT or RP27PT Service Sink valvesPowerstream Pro whole house applications Standard tub fixtureHotCold Bosch ProTankless gas water heater SymbolsHot Cold Parallel unit applications Bosch GWH 715 ES Bosch GWH C 800 ES Pressure relief valvesGWH 715 ES and GWH C 800 ES cascading Cascading unit applicationsPressure Bosch GWH 345 ESR Bosch GWH 450 ESR Single unit tank loading application plumbing diagramCold water Feed DHW ESR control Board Single Unit Tank Loading Electrical DiagramCold water Radiant space heating and DHW plumbing diagramFeed 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 Back Flow preventer Baseboard Radiant PanelDrawing # 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