Figure 8.4.1 Milborne Multiple Installation - Hamworthy MILBORNE381 Series Design Installation, Commissioning And Operating Instructions

8.4 Set-up for multiple boiler installations
One of the many functions included in Milborne
electronics allows for the installation of several modules
in series, to create boiler assemblies having an overall
power exceeding 75 kW.
This type of system requires one single Milborne
equipped with a Master control unit, while all other
boilers will be equipped with a Slave control unit.
The cabling and setting of components, is as follows:
8.4.1 Connect the cabling of the modules making up
the series as shown in figure 8.4.1
8.4.2 Every slave control unit making up the system
should be identifiable by the single Master control unit
by means of an address which is assigned through
specific settings on the two series of switches, J10 and
J17, located on each Slave in the set.
Each slave (one for each burner) needs to be properly
configured so that the Master controller can identify its
position in the sequence.
First the Slave boards need to be divided into 15
blocks. The Master control system can manage a
maximum of 15 blocks each made up of 4 Slaves.
Eg, If 5 Slave controllers are connected to one Master
controller then 2 blocks are required. The first
containing 4 Slave controllers and the second just 1.
To configure the addresses follow the next procedure.
1. Identify the block that each Slave is to be
assigned, eg block 1... 2... 3... etc.
2. Identify the position that each Slave is to be
assigned in its chosen block, e.g. position 1...
2... 3 etc.
HAMWORTHY HEATING LTD
Milborne multiple installation (1 Milborne 382/502 Master with 2 Milborne 382/502 Slaves
Milborne 382/502 Slave
Slave Slave
No 3 No 4
Figure 8.4.1 - Milborne Multiple Installation
Note: Master controllers are all pre-set as follows;
381/501 - 382/502 Master controllers are always
despatched as position 1 and position 2 of block
number 1.
382/502 Slave controllers always despatched as
position 3 and position 4 of block number 1.
Therefore as part of the pre-commissioning checks
the settings of all Slave controller block and position
switches must be checked.
To assist the correct setting of the block and position
switches, see figure 8.4.2.
Figure 8.4.1 indicates an installation with 1 block and
with 1 boiler module. Both addresses are set to 1.
8.4.3 example of installation consisting of 7 boiler
modules.
When installing 7 boiler modules, ie 7 slaves, two
blocks are needed. The first consisting of four boiler
modules and the second consisting of three boiler
modules. The two blocks must be addressed
separately 1 & 2, with block 1 having boiler module
addresses 1, 2, 3 & 4 and block 3 having boiler
module addresses 1, 2 & 3 - refer to figure 8.4.3
Milborne 382/502 Master
Slave Slave
No 1 No 2
Master
30
MILBORNE
Milborne 382/502 Slave
Slave Slave
No 5 No 6
500001130/J