Watts AERCO Benchmark BMK750 Operation And Service Manual page 121

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 7 – BOILER SEQUENCING TECHNOLOGY
OPTION 7 Instructions: Remote Setpoint, Modbus Header Temp Sensor & 4-20ma Setpoint
Drive
Step 3: OPTION 7 CONFIGURATION
Using the Modbus Transmitter provides gives the plant the ability to use the Backup
manager feature. This allows the any of the client units to become a Backup manager if
the manager unit is not communicating.
On All Boiler:
Main Menu → Advanced Setup → BST Cascade → Cascade
1. Go to:
•
Set the Unit Mode parameter to BST Client.
Main Menu → Advanced Setup → BST Cascade → Application
2. Go to:
•
Set the Unit Address parameter to the communication address of the unit.
On the BST Manager only:
Main Menu → Advanced Setup → BST
1. Go to
in each menu in the table below.
Menu/Screen Name
Cascade
Configuration
Application
Configuration
Cascade Comm
* Be sure that the SW1-4 DIP switch on Controller's Interface Board is set appropriately (On = Current,
Off = Voltage.)
OMM-0145_A99 • GF-218 •
Parameters
Auto Manager Transfer
Auto Failover Type
Backup Manager Address
Unit Mode
Hdr Temp Sensor
Sensor Comm Address
Hdr Temp Point
Application
SH Operating Mode
BST Remote Signal
Min address
Max address
Cascade Baud Rate
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019
Cascade, set the Parameters to the Values
Values
Enabled (This is available on the Manager
unit only)
C-More
Enter the designated backup unit address
BST Manager
Network
240
14
Space Heating
Rmt Setpt Analog
4-20mA/1-5V *
The minimum unit address in the cascade
The maximum unit address in the cascade
The baud rate for the cascade.
Configuration:
Configuration:
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