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Interior components diagram and parts list
37
8.3 Parts list
Item Description Reference
GROUP 1
1 Front cover 8 705 431 223
2 Cover screw no. 10 x 22mm 2 910 612 435
3 Trade mark badge 8 701 103 140
4 Gasket 8 704 701 077
5 Support set 8 708 006 130
6 Grommet set 8 710 203 039
7 Deflector plate 8 700 100 376
8 Screw M4,8 x 9,5mm 8 703 403 012
9 Angle bracket 8 708 003 218
10 Flue gas accessory 8 705 504 149
11 Washer 8 716 140 939
12 Screw 8x3/8" philips 2 910 612 424
13 Washer 8 711 004 022
14 Throttle disc set (GWH345ESR) 8 709 918 779
14 Throttle disc set (GWH450ESR NG) 8 709 918 780
14 Throttle disc set (GWH450ESR LP) 8 709 918 782
15 Combustion air accessory 8 705 504 148
16 Clip 8 701 201 032
17 Holding bracket (GWH345ESR) 8 701 302 099
17 Holding bracket (GWH450ESR) 8 701 302 235
18 Cover 8 701 302 225
19 Mounting bracket with screws 8 708 003 143
GROUP 2
1 Heat exchanger (GWH345ESR) 8 705 406 323
1 Heat exchanger (GWH450ESR) 8 705 406 329
2 Temperature limiter/ECO 104°C 8 707 206 204
3
Washer 25OD X 21ID X 2MM
8 700 103 125
4 Locknut G 1/2" 8 713 300 018
5
Fiber washer 18.6x13.5x1.5
8 710 103 045
6 Cold water pipe 8 700 703 163
7 O-ring 8 700 205 135
8 Temperature sensor 8 700 400 015
9 Connection bush 8 703 305 326
10 Wireform spring 8 714 606 002
11 Mounting bracket 8 701 309 158
12 Screw 8 743 401 019
13 Cage nut 8 703 309 001
14 Screw M 5.0X20 DIN 7985 2 910 642 162
15 Clip 8 716 102 607
GROUP 3
1 Main burner LP (GWH345ESR) 8 708 120 625
1 Main burner NG (GWH345ESR) 8 708 120 624
1 Main burner LP (GWH450ESR) 8 708 120 623
1 Main burner NG (GWH450ESR) 8 708 120 622
Table 17
2 Screw 8 703 404 089
3 Screw 8 703 401 069
4 Screw M4 x 12 phillips 2 910 952 122
9 Washer 8 701 003 010
10 Angle bracket 8 711 304 287
11 Screw 2 910 619 409
12 Washer 1" 8 710 103 060
13 Ignition electrode 8 708 107 008
14 Screw m3.5x6 phillips steel 2 910 642 082
15 Flame sensor 8 708 107 009
GROUP 4
1 Gas valve 8 707 021 333
2 Connector 8 705 202 126
3
Washer- fibre 24OD X 16ID X 2MM
8 700 103 014
4 Connection bush 8 703 305 325
5 O-ring 8 700 205 144
6 Screw 2 912 601 120
GROUP 5
1 Front cover 8 707 207 219
2 Selector knobs 8 702 000 309
3 Cover 8 705 400 069
4 Screw 8 703 403 074
5 Cover 8 705 400 056
6 Printed circuit board 8 708 300 193
7 Fuse T3, 15A 1 904 522 745
8 Centrifugal blower 8 707 204 061
9 Differential pressure line 8 703 305 302
10 Set of hose 8 700 703 049
11 Pressure differential switch
(GWH345ESR)
8 707 406 007
11 Pressure differential switch
(GWH450ESR)
8 707 406 074
12 Screw tapping no6 x 9.5 2 910 612 410
13 Cable 8 704 401 311
14 Cable 8 704 401 312
15 Set of cables 8 704 401 309
16 Cable 8 704 401 308
17 Set of cables 8 704 401 310
18 Power supply cord 8 704 401 267
19 PCB wire harness 8 704 401 295
20 Junction box 8 701 103 142
Item Description Reference
Table 17