Bosch C 1050 Manual

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Interior components diagram and parts list61
ItemDescriptionReference
1 Heat exchanger 8 705 406 421 
2 Heat exchanger top gasket 8 704 701 052 
3 Condensing exchanger inlet 8 705 700 159 
4 Overheat sensor (ECO) 8 707 206 204
5 Heat exchanger bottom gasket 8 704 701 054
6 Site window 8 701 000 401 
7 Ignition group 8 701 302 249 
8 Heat exchanger O-ring 8 700 205 147
9 Rubber grommet 8 710 303 027 
10 Connecting pipe 8 700 715 403 
11 Pipe connection clip 8 701 201 028
12 Condensing...

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Interior components diagram and parts list 
12.2.3 Group 3 
Fig. 81 Components Diagram
15
14
1
3
4
6
7
8
2
12
9
11
13
16
17
5
6720902975.AA JF
ItemDescriptionReference
1 Main burner (Natural Gas) 8 708 120 642 
1 Main burner (LP Gas) 8 708 120 699 
2 Burner gasket 8 704 701 087 
3 Primary fan 8 707 204 071
4 Backflow temperature sensor 8 707 206 459
5 Washer 8 704 701 097 
6 Fan mount nut 2 915 011 006 
7 Secondary fan 8 707 204 074
8 Screw 8 703 403 012
Table 32
9 Gas / Air Mixer 8 705...

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Interior components diagram and parts list63
12.2.4 Group 4 
Fig. 82 Components Diagram
9
2
14
1
3
4
5
6
7
8
11
11
12
13
10
6720902976.AA JF
ItemDescriptionReference
1 Gas valve 8 707 021 019 
2 Pressure tapping 8 703 404 219
3 Washer 8 700 203 041 
4 Pressure balance tube 8 700 703 136 
5 Pressure balance nut 8 703 300 041
6 Gas supply pipe 8 700 715 389
7 Gas valve washer 8 700 103 014
Table 33
8 Gas filter 8 700 507 002 
9 Gasket 8 704 701 085 
10 Gas / Fan connector 8 705 202 140 
11...

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Interior components diagram and parts list 
12.2.5 Group 5 
Fig. 83 Components Diagram
9
11
12
13
10
1
2
3
4
4
5
6
7
8
9
11
14
15
16
17
12
6720902977.AA JF
(optional)
ItemDescriptionReference
1
Water valve with engine and  
temperature sensor 8 708 505 024
2 O-ring 8 700 205 147 
3 Cold water pipe 8 700 715 394 
4 Pipe connection clip 8 701 201 028
5 Hot water pipe 8 700 715 469 
6 Temperature sensor 8 700 400 015 
7 Outlet fitting 8 703 305 349
8 Inlet / Outlet washer 8 710 103 045 
9...

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Interior components diagram and parts list65
12.2.6 Group 6 
Fig. 84 Components Diagram
3
7
6
9
5
10
4
1
2
15
13
16
14
12
6720608158-75.2V
11
ItemDescriptionReference
1 Control unit 8 707 207 368 
2 Fuse T2.5A  1 904 521 342
3 Fuse T1.6A  8 700 609 008
4 Power supply cables  8 704 401 371 
5 Power supply cord  8 704 401 378 
6 Fan cables 8 704 401 347
7 Wire harness  8 704 401 348 
9 Electrode cables  8 704 401 346
Table 35
10 Flue gas limiter 8 700 400 032 
11 Kit Inteligent Cascading 7...

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Protecting the environment
13 Protecting the environment 
Packing 
The packing box may be fully recycled as confirmed 
by
the recycling symbol  . 
Components 
Many parts in the heater can be fully recycled in t he end
of  the  product  life.  Contact  your  city  authorities  for
information about the disposal of recyclable produc ts.
Saving water resources: B Make sure you close all the taps after any use. Avo id
leaving the taps dripping. Repair any leaking tap.
B Define the temperature...

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Limited Warranty67
14 Limited Warranty
General 
BOSCH PRO tankless water heaters are warranted by 
the  Manufacturer  (BOSCH)  through  Bosch
Thermotechnology Corp.  
Bosch  Thermotechnology  Corp.   will  furnish  a
replacement  heat  exchanger  and  will  furnish  a
replacement of any other part which fails in normal  use
and  service  within  the  applicable  periods  specified
below,  in  accordance  with  the  terms  of  this  warrant y.
The  Bosch  Thermotechnology  Corp....

Replacement Parts available from:
Bosch Termotecnologia SAEstrada de Cacia
3800 - 533 Cacia - PORTUGAL
© 2010 Bosch Thermotechnology Corp., 
Londonderry, N H
BOSCH THERMOTECHNOLOGY  
CORP. 
50 Wentworth Avenue 
Londonderry, NH 03053 USA 
Tel. 866-330-2730 
www.boschpro.com
Installer Checklist to be completed by installer up on installation 
Serial Number ___ ___ ___ ___ ___ ___ ___ ___
(8 digit serial number is located on rating plate on right side panel)
Gas Pressure Reading* Static__________...