Watts AERCO Benchmark BMK750 Operation And Service Manual page 119

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 7 – BOILER SEQUENCING TECHNOLOGY
OPTION 6 Instructions: Remote Setpoint, Direct Wired Header Temp Sensor, Modbus Setpoint
Drive
NOTES:
•
Polarity must be observed for the RS485 connections.
•
Connect the shield to any SHLD terminal on the I/O Board.
•
When mounting the Outdoor Temp Sensor, it must be located on the North side of the
building where an average outside air temperature is expected. The sensor must be
shielded from direct sunlight as well as impingement by the elements. The outdoor
sensor may be wired up to 200 feet (61m) from the boiler.
•
There is no polarity to be observed. The ground for the shield is at the power supply
ground. The sensor end of the shield must be left free and ungrounded.
Step 3 – OPTION 6 CONFIGURATION
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
OMM-0145_A99 • GF-218 •
Parameters
Unit Mode
Hdr Temp Sensor
Application
SH Operating Mode
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
BST Manager
Header Temp
Space Heating
Rmt Setpt Netwrk
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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