LAARS NeoTherm NTV (Sizes 080–850 MBTU/h) - Start Up Guide - Manual (Page 12)

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LAARS Heating Systems
Cascading multiple boilers, continued
Slave Boiler Set Up
Modbus Address
All of the boilers will each need their own Modbus address. On boilers two through eight you will
need to change the “MB1 Modbus Address” and the “MB2 Modbus Address”.
Example: On the Master boiler leave the MB1 and MB2 address as 1. On boiler two the MB1 and
MB2 addresses will be 2. On boiler three the MB1 and MB2 addresses will be 3, etc..
Navigation
•Home screen, press “I Info/Install button, press OK.
•Highlight “Advanced Set Up”, press OK
•Highlight “System Configure”, press OK
•Choose “System ID & Access”, press OK.
•Scroll down to highlight “MB1 Modbus Address”, press OK
•Use the Up arrow buttons to change the number for boilers 2 through 8. Press OK
•Next, use the down arrow button to highlight “MB2 Modbus Address”, press OK
•Log in, the password is “LNT” in lower case.
•Change the MB2 address, then press OK
Note: It will take 5 seconds for the Modbus change to appear on the screen.
Disable the Master function and enable the Slave function on each of the
slave controls.
Navigation
•Home screen, press “I” Info/Install button, press OK
•Highlight “Advanced Set Up”, press OK
•Use the Down button to highlight “Lead Lag Configure”, press OK
•“Lead Lag Master Configure” is highlighted, press OK
•“Master enabled” is highlighted, press OK
•Use the Up button to highlight Disable, press OK
Next, press the Back button to get back to the Lead Lag Configure screen
•Use the Down button to highlight “Lead Lag Slave Configure”
•Press OK to Enable the Slave function
•Use the Down button to highlight “Enable via SOLA master, press OK
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