Bosch Appliances Model GWH 425 manual Parts list, Description Reference

Page 26

Interior components and diagram parts list

8.3Parts list

Item

Description

Reference

1

Front cover

8 705 431 246 0

 

 

 

2

Shield

8 705 506 817 0

 

 

 

3

Temp control knob

8 702 000 295 0

 

 

 

4

Draft Diverter

8 705 505 442 0

 

 

 

5

Exhaust pipe union Ø128

8 705 504 046 0

 

 

 

6

Angle bracket

8 708 003 192 0

 

 

 

7

Trade mark badge

8 701 103 135 0

 

 

 

8

Heat exchanger

8 705 406 275 0

 

 

 

9

Cold water pipe

8 700 715 061 0

 

 

 

10

Main burner NG

8 708 120 618 0

 

 

 

10

Main burner LP

8 708 120 619 0

 

 

 

11

Connector

8 705 209 062 0

 

 

 

12

Piezo clip (x10)

8 701 201 019 0

 

 

 

13

Sparking plug

8 748 107 089 0

 

 

 

14

Pilot gas pipe

8 700 707 369 0

 

 

 

15

Tube (x10)

8 740 609 002 0

 

 

 

16

Pilot screen

8 700 507 067 0

 

 

 

17

Gas valve LP

8 707 021 396 0

 

 

 

17

Gas valve NG

8 707 021 395 0

 

 

 

18

Throttle housing

8 705 502 067 0

 

 

 

19

Washer (x10)

8 701 004 044 0

 

 

 

20

Pilot injector LP

8 708 200 326 0

 

 

 

20

Pilot injector NG

8 708 200 327 0

 

 

 

21

Pilot valve

8 708 500 301 0

 

 

 

22

Poppet valve head (2) NG

8 708 500 358 0

 

 

 

22

Poppet valve head (3) LP

8 708 500 359 0

 

 

 

23

Electromagnet

8 707 201 028 0

 

 

 

24

Electromagnet cap

8 703 305 283 0

 

 

 

25

Valve operation housing

8 708 008 069 0

 

 

 

26

Guide plate

8 701 000 380 0

 

 

 

27

Gas pressure regulator LP

8 707 406 083 0

 

 

 

27

Gas pressure regulator NG

8 707 406 084 0

 

 

 

28

Water valve

8 707 006 344 0

 

 

 

29

Watervalve pushrod (10x)

8 703 204 051 0

 

 

 

30

Diaphragm (L)

8 700 503 084 0

 

 

 

31

Inlet water connection

8 700 306 110 0

 

 

 

32

Selector screw

8 708 500 304 0

 

 

 

33

Piezo igniter

8 708 108 051 0

 

 

 

34

Fixing bracket

8 701 302 181 0

 

 

 

35

Ignition lead

8 704 401 040 0

 

 

 

36

Thermocouple

8 707 202 083 0

 

 

 

37

Flue gas safety device

8 707 206 445 0

 

 

 

38

Washer (x10)

8 701 004 043 0

 

 

 

39

Heat exchanger washer

8 700 103 658 0

 

 

 

40

Threaded bushing

8 700 306 148 0

 

 

 

41

Connector

8 700 306 187 0

 

 

 

42

Water filter

8 700 507 059 0

 

 

 

43

Outlet Hose

8 700 703 139 0

 

 

 

44

Water connection clip

8 701 201 020 0

 

 

 

45

Plunger

8 703 502 039 0

 

 

 

46

Volumetric water governor

8 705 705 034 0

 

 

 

47

ECO

8 707 206 017 0

 

 

 

48

Temperature limiter

8 707 206 132 0

 

 

 

49

Venturi

8 708 205 279 0

 

 

 

50

Hot water pipe

8 700 715 178 0

 

 

 

51

Gas supply pipe

8 700 715 351 0

 

 

 

52

Cover

8 705 500 105 0

 

 

 

Table 5

26

6 720 608 034

Image 26
Contents GWH-425-PN-N GWH-425-PN-L Index IndexAppliance details GWH 425 PN specifications Technical dataOver heat prevention temperature limiter Water resistant Appliance detailsUnpacking the GWH 425 PN heater General rules to follow for safe operationDimensions and installation clearances Dimensions in Inches and mmHeater placement and clearances Installation instructionsProper location for installing your heater Installation instructionsMounting Heater Screws Incandescent particle trayCombustion air requirements Appliances located in confined spacesVenting Installation instructions Masonry chimney Existing interior masonry chimneyGas piping & connections GAS ConnectionsFor Natural GAS Measuring gas pressure Connecting manometer Shut off gasConnecting the pressure relief valve PRV Water connectionsRecirculation application For your safety read before operating your water heaterOperation instructions Operation instructionsLighting instructions To turn off applianceDraining water from heater Setting the water temperatureTemperature adjustment knob Water valve Maintenance and serviceMaintenance intervals PilotMineral scale build-up Vent assemblyMain burners Operate the circulating pumpIntroduction Pilot does not light TroubleshootingPilot lights, but goes out when button is released Pilot goes out during or after hot water useCheck for a clogged inlet water filter screen see chapter Hot water temperature fluctuates at tapBurners do not light with water flow Water is not hot enough Noise when heater is runningWater is too hot Burners ignite without hot water flowBurners do not operate cleanly yellow flames when operating Saving water resources Protecting the environmentProtecting the environment Interior components Interior components and diagram parts listInterior components and diagram parts list Components diagram Components DiagramParts list Description ReferenceFifteen Year Limited Warranty Gas Pressure Reading Static Bosch Group Bosch Water Heating Mad River ParkSerial Number Waitsfield, VT all rights reserved