Bosch Appliances GWH 2700 ES LP Level Vent length1 Speed P2, Adjusting minimum power fan speed P2

Page 18

Installation instructions

				Natural Gas	Liquid propane

	Altitude	Total	Minimum	Maximum	Maximum
	(above sea	equivalent	power fan	power fan speed	power fan speed
	level)	vent length1)	speed (P2)	(P1)	(P1)
	0 - 2000 ft	5.5 - 32 ft	7	No	No
	0 - 2000 ft			No	No
	(0 - 610 m)			modification required	modification required
	(0 - 610 m)	33 - 57 ft	8	modification required	modification required
			8

						For operation at elevations
		5.5 - 32 ft	8*	48*	47*	For operation at elevations
	2000 - 4500 ft	5.5 - 32 ft	8*	48*	47*	above 2,000 ft (610 m) the
	2000 - 4500 ft					equipment ratings shall be
	(610 - 1372 m)					reduced at the rate of 4% for
	(610 - 1372 m)	33 - 57 ft	8*	49*	48*	reduced at the rate of 4% for
		33 - 57 ft	8*	49*	48*	each 1,000 ft (305 m) above sea
						level
	4500 - 8000 ft	5.5 - 32 ft	9*	49*	48*
	4500 - 8000 ft
	(1372 - 2439 m)
	(1372 - 2439 m)	33 - 57 ft	9*	50*	49*
		33 - 57 ft	9*	50*	49*

* Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see section 6.4 for instructions.

Table 12 Fan speed adjustment

1)Full equivalent length (inlet + outlet piping + fittings)

Adjusting minimum power fan speed (P2)

To select fan speed:

BPress ON/OFF button into OFF.

BPress and hold "Program" button and press ON/OFF button to turn appliance ON.

Adjusting maximum power fan speed (P1)

To select fan speed:

BPress ON/OFF button into OFF.

BPress and hold "Program" button and press ON/OFF button to turn appliance ON.

Fig. 22

B As soon as '188' is displayed, release "Program"

button , and the display should read P2.

BPress or to choose the fan speed suitable with your installation, see Table 12.

BPress and hold (± 5 sec.) “Program” button until the display flashes, then the selected value is memo- rized.

Fig. 23


B As soon as '188' is displayed, release "Program" but-
ton	, and the display reads P2.
B Press the minus button			to display P1.
B Press “Program” button			to enter P1 adjustment.
The current setting will appear on the display.
B Press	or	to choose the fan speed suitable
with your installation, see Table 12.
B Press and hold (± 5 sec.) “Program” button				until

i

Do not set P2 to greater then 9.

the display flashes, then the selected value is memo-

rized.

Proceed directly to Section 6.4 to confirm

iCO2 values are within range.

18	6 720 608 542

Image 18

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 DimensionsIntroduction Installation instructionsTools required for installation VentingInstallation instructions Horizontal venting systems only Venting SpecificationsFittings or Piping Equivalent Feet Minimum combustion air and exhaust pipe length Installation instructions Condensate drain requirementsTwin pipe termination clearances 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 FabIntake Total equivalent vent length calculationExhaust 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 GWHStatic Pressure Test Connecting manometerMeasuring gas pressure 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 Operation Use of optional remote control Accessory part no. TSTAT2Reset button Program buttonAnnual maintenance Maintenance and serviceAnnual maintenance table Every year Winterizing for seasonal useAdjusting CO2 carbon dioxide Descaling using a pumpMineral scale build-up Returning to Service Measuring CO2 combustion cover must be installedAdjusting CO2 Once Gas Pressure is adequateFinal Readings % 3.0 % 60 ppmProgram Description Factory Default Program valuesComment Control board diagnostics Diagnostic menuWater is too hot TroubleshootingTroubleshooting 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 Packing Protecting the environmentProtecting the environment ComponentsLimited Warranty Limited Warranty 6720608542