Connecting Boilers In Cascade With A Oci 345 Module; Configuration For 1 Master Boiler And 1 Slave Boiler - Potterton SIRIUS THREE FS 70 Installation Manual

6 Connecting diagrams and configuration
Tab.16 Connecting the boiler components in cascade
Component 1
OCI 345 module on the boiler
MB connector of a OCI 345 module
DB connector of a OCI 345 module
Fig.35 Connecting OCI 345 modules for
boilers in cascade
DB.MB DB.MB
Tab.17 Settings on boiler 1 (master boiler)
Parameter number
5710
5715
5721
5730
5731
5890
5892
5932
6020
6600
6640
40
6.3.3
Connect the boilers included in the boiler cascade with OCI 345 modules
(electronic devices that handle communication through a BUS link). The
OCI 345 modules must be connected to each boiler with three connectors.
To make the connections between the various MB and DB connectors,
use a shielded cable with the following specifications:
Type
HAR H05 VV-F
DB.MB
MW-3000042-2
6.3.4
1. Go to the installer parameters on boiler 1 (master boiler).
2. Set the following parameters on boiler 1:
Parameter
Temps / mode CH1
Temps / mode CH2
Temps / mode CH3
Hot water sensor
Sensor input BX2
Relay output QX1
Relay output QX3
Sensor input BX3
Function extension module 1
Device address
Clock mode
3. Go to the installer parameters on boiler 2 (slave boiler).
Important
Relay the pumps if the current exceeds 1 A max. per output.

Connecting boilers in cascade with a OCI 345 module

Component 2
X30 connector on the boiler PCB. (Flat cable supplied with the
OCI 345 module)
MB connector of a boiler OCI 345 module
DB connector of a boiler OCI 345 module
Cross section
2 x 1.5 mm

Configuration for 1 master boiler and 1 slave boiler

Adjustment required
On
On
Off
Hot water sensor B3
Common flow sensor B10
heating pump CH1 Q2
Hot water ctrl elem Q3
Cascade return sensor B70
Temps / mode CH2
1
Master
Maximum length
200 m
2
7609493 - v11 - 18052020