Controls And Programming Unit; Control Unit Controls - Bosch CFB 840 Servicing Instructions

B Reposition rotary dial.
1
Fig. 4 Boiler water temperature controller
[1] End stop tabs
4

Controls and programming unit

4.1

Control unit controls

Fig. 5 Control unit controls (delivered condition)
[1] High limit safety cut-out
[2] Boiler water temperature controller
[3] Fuse F1
Fig. 6 Fitted modules
[1] Slot 1, e.g. FM442/CMM 920 - heating circuit 1, heating circuit 2
[2] Slot A: ZM422 - feed for external heat sources, heating circuit 0
CFB 840
6 720 803 704-04.1T
1 2 3
1 2
4 5 6
[4] Connection for external service equipment and programmer
[5] Burner emergency operation switch
[6] On/Off switch
3 4
[3] Slot B: Programmer (CM431) - programming unit
[4] Slot 2, e.g. FM442/CMM 920 - heating circuit 3, heating circuit 4
Controls and programming unit | 7
6 720 803 704-05.1T
6 720 803 704-06.1T
6 720 802 836 (2012/05)