Riello NXHP Series Installation, Operation And Maintenance Instructions page 44

3 - INSTALLATION OF SYSTEM
3.7.3 - Control configuration steps
a - Configuration steps: one master and two slaves with one user interface on master
N° Steps Figure
1
2
3
4
5
44
Table Par. Designation Description
For master unit with a WUI, to address the different units of master/slave installation,
it is necessary to disconnect RS485 bus (Green connector J6) from Master and all Slaves
except the last one.
But WUI is switched on by master unit (12VDC)
CCN
641 Element
Address
Wait 30s before next step.
An error can appear on WUI screen, but it is not a problem to continue the configuration.
Connect the RS485 bus (Green connector J6) on Slave 1, besides Slave 2
CCN
641 Element
Address
Wait 30s before next step.
An error can appear on WUI screen, but it is not a problem to continue the configuration.
Connect the RS485 bus (Green connector J6) on Master, besides Slave 1 + 2
Slave #1
743
Address
Slave #2
744
Address
Master/
742 Slave
Selection
MSL_
CONF
Cascade
751
Type
Capa. to
746 Start Next
Unit
Apply procedure §3.7.3.b-Manage the Master and Slave
units with a commom user interface to pass on Slave 1 status
Master/
MSL_
742
Slave
CONF
Selection
User
UI_CONF 521 Interface
Type
It is necessary to set the NHC board
address of Slave 2 different as NHC
board address of Master
It is necessary to set the NHC board
address of Slave 1 different as NHC
board address of Master
It is necessary to set the Slave address
different as Master address
It is necessary to set the Slave address
different as Master address
Allow the Master/Slave operation as
Master:
0 = Disable
1 = Master
2 = Slave
The cascade type configuration refers
to the control of master / slave
operation.
0 = Starting Master First, then first
Slave to last Slave. Stopping Last
Slave to first Slave, then Master.
1 = Starting/stopping units according to
their wear factors.
2 = All units (Master and Slaves) are
started/stopped at the same time.
If Cascade Type = 0 or 1, then it is
possible to set this parameter [P746]. It
define the purcentage of capacity that
the operating unit must reach before to
start the next unit. This parameter is
defined only on master unit.
Allow the Master/Slave operation as
Slave:
0 = Disable
1 = Master
2 = Slave
Configure User interface for Slave:
0 = No User Interface
1 = Remote control by contacts or SUI
2 = WUI remotely installed in the
house ("Air Temp" icon is displayed)
Range Default Ex. Unit
0 to
0 3 -
239
0 to
0 2 -
239
0 to
0 2 -
239
0 to
0 3 -
239
0 to 2 0 1 -
0 to 2 1 1 -
30 to
75 75 %
100
0 to 2 0 2 -
0 to 2 0 1 -