Watts Aerco Benchmark Series Operation And Service Manual page 90

Benchmark Platinum-Edge: Operation-Service Manual
SECTION 7 – BOILER SEQUENCING TECHNOLOGY
OPTION 4 Instructions: Outdoor Reset, Modbus Header Sensor & Modbus Outdoor Sensor
NOTES:
•
Polarity must be observed for the RS485 connections. The ground for the shield is at
the "SHLD" terminal in the I/O the Box.
•
When mounting the Outdoor 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 4 CONFIGURATION
On All Boiler:
1. Go to: Main Menu
•
Set the Unit Mode parameter to BST Client.
2. Go to: Main Menu
•
Set the Unit Address parameter to the communication address of the unit.
On the Manager only:
1. Go to Main Menu  Advanced Setup  BST Cascade, set the Parameters to the Values
in each menu in the table below.
Menu/Screen Name
Cascade
Configuration
Application
Configuration
Cascade Comm
OMM-0137_D • GF-211 • 7/16/2019
 
Advanced Setup
 
Advanced Setup
Parameters
Unit Mode
Hdr Temp Sensor
Sensor Comm Address
Hdr Temp Point
Application
SH Operating Mode
Outdoor Temp Sensor
Sensor Comm Address
Outdoor Temp Point
Plant Setpoint
Min address
Max address
Cascade Baud Rate
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST

BST Cascade Cascade Configuration:

BST Cascade Application Configuration:
Values
BST Manager
Network
240
14
Space Heating
Outdoor Reset
Outdoor Sensor
240
15
Header temperature required for the cascade
The minimum unit address in the cascade
The maximum unit address in the cascade
The baud rate for the cascade.
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