Electrical Connections To The Oci 345 Interface; Access To Parameters - Siemens AVS 75.391 Handbuch

3.3

ELECTRICAL CONNECTIONS TO THE OCI 345 INTERFACE

The OCI 345 interface is an electronic device allowing the boilers in the cascade arrangement to communicate between themsel-
ves via BUS. An OCI 345 accessory must be connected to each boiler. The following connections must be made:
• Between each OCI 345 unit and the X30 connector of the boiler main board via a flat cable (supplied with the accessory).
• Between the MB connector of an OCI 345 unit and the MB connector of another unit.
• Between the DB connector of an OCI 345 unit and the DB connector of another unit.
To make the connections between the various connectors MB and DB use a "HAR H05 VV-F" 2X1.5 mm
a maximum length of 200m.

4. ACCESS TO PARAMETERS

To set the parameters, use the Control Panel. To connect the accessory to the boiler, consult the boiler instructions manual.
SYMBOLS ON THE CONTROL PANEL (section 1)
Turn knob B
Press knob B
Press button A or C
To correctly configure all the cascade parameters, access must be made at level 3,as described in the following procedure.
KEY TO FIGURE MENU
1
Enduser
2
Commissioning
The following procedure is used to access the four boiler pro-
gramming menus:
• from the main menu
• A andC (hold down for approx. 6 seconds)
menu 1-2-3-4 (see figure to side and key).
• C to go back one menu at a time to the main menu.
7105035.03 (1-10/11)
3
Engineer
4
OEM
C.
Display shows
Press button A and knob B together
Press buttons A and C together
16
harmonised cable with
2