Bosch Appliances GWH 2700 ES LP Program values, Program Description Factory Default, Comment

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Maintenance and service

6.5Program values

This section describes details on programming the appliance. For most applications the factory default values will robust and stable operation. Only adjust the factory settings if the installation requires changes as indicated in the appropriate section of this manual.

Refer to chapter 6.6 Control board diagnostics (page 37) regarding how to access these P-modes.

Caution: Misadjusted program values can lead to appliance malfunction, errors, and service calls.

Program

Description

Factory Default

MIN

MAX

Comment

 

 

 

 

 

 

P1

Maximum Power

NG: 48, LP: 46

21

NG: 50, LP: 49

see chapter 3.12, page 27.

 

 

 

 

 

note: reducing P1 values below

 

 

 

 

 

maximum will reduce maximum

 

 

 

 

 

power of the appliance.

 

 

 

 

 

 

P2

Minimum Power

7

7

20

see chapter 3.3.6, page 17

 

 

 

 

 

 

P3

Remote Con-

_0

_0

6

see chapter 5.5, page 31

 

trols installed

 

 

 

 

 

 

 

 

 

 

P4

Access to Diag-

E

0d

10f

see chapter 6.6, page 37

 

nostic Mode

 

 

 

 

 

 

 

 

 

 

P5

Cascade Mode

NO

NO

CC

contact Bosch for details

 

 

 

 

 

 

P6

Temperature

°F

°F

°C

 

 

Unit

 

 

 

 

 

 

 

 

 

 

P7

Appliance Type

NO

Cd

NO

Condensing / Non-condensing*

 

 

 

 

 

 

P8

Back light

dE

dE

ON

dE turns back light off after 60

 

 

 

 

 

seconds from last button

 

 

 

 

 

pushed, ON turns backlight on

 

 

 

 

 

permanently

 

 

 

 

 

 

P9

Fan Purge

 

 

 

runs secondary and primary fan

 

 

 

 

 

when P9 is selected by

 

 

 

 

 

depressing the “P” - button

 

 

 

 

 

 

Table 18 Program values, factory default settings and ranges. * Incorrect setting causes errors.

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Contents Intended for variable flow applications What to do if you smell gasIndex For your safety Features Appliance detailsSpecifications Technical data To remove combustion cover service only Unpacking the heaterGWH 2700 ES is not approved or designed for General rules to follow for safe operation VentingDimensions and Minimum installation clearances DimensionsInstallation instructions Tools required for installationIntroduction VentingInstallation instructions Horizontal venting systems only Venting SpecificationsFittings or Piping Equivalent Feet Installation instructions Condensate drain requirements Twin pipe termination clearancesMinimum combustion air and exhaust pipe length Maximum combustion air and exhaust pipe lengthCanadian installations1 Installations2 Canadian installations1 Horizontal twin pipe penetration Vertical venting installation twin pipe penetra- tion Vent connectionsInstallation instructions Condensate drain installation Venting Flex ProTech Heat FabTotal equivalent vent length calculation ExhaustIntake ExampleAdjusting minimum power fan speed P2 Adjusting maximum power fan speed P1Level Vent length1 Speed P2 Installation instructions Combustion air requirements Twin pipe and Concentric pipeProper location for installing your heater Heater placement and clearancesMounting installation Gas piping & connections GAS Line Sizing For Natural GAS Water connections Water qualityDomestic hot water recirculation GWHConnecting manometer Measuring gas pressureStatic Pressure Test Operating Pressure TestElectrical power supply Electrical connectionsPosition of the fuses in control unit Operation instructions LCD Display functionsFor your safety read before operating your water heater PowerTemperature selection Use of optional remote control Accessory part no. TSTAT2 Reset buttonOperation Program buttonMaintenance and service Annual maintenance table Every yearAnnual maintenance Winterizing for seasonal useAdjusting CO2 carbon dioxide Descaling using a pumpMineral scale build-up Measuring CO2 combustion cover must be installed Adjusting CO2Returning to Service Once Gas Pressure is adequateFinal Readings % 3.0 % 60 ppmProgram Description Factory Default Program valuesComment Control board diagnostics Diagnostic menuTroubleshooting TroubleshootingWater is too hot Water is not hot enoughHot water temperature fluctuates at tap Low water flow/pressureNoisy burner/heater during operation Lack of adequate gas pressure. Inadequate gas Problem solving Error code diagnosticsProblem solving Display Cause Solution Venting may cause this failureOver-temperature detected by No flame ionization detected with Electrical diagram Electrical diagramSensor resistance charts Back Flow characteristics GWH 2700 ES Functional scheme Functional schemeInterior components diagram and parts list Interior components diagram and parts listInterior components Appliance overview Components diagram GroupDescription Reference Interior components diagram and parts list Group 1211 6720608158-73.1AL Interior components diagram and parts list Group 708 300 Protecting the environment Protecting the environmentPacking ComponentsLimited Warranty Limited Warranty 6720608542