Installation Notes; Bst Quick Start Chart - Watts Aerco Benchmark BMK750 Operation And Service Manual

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 7 – BOILER SEQUENCING TECHNOLOGY

Installation Notes

7.1.1
A ProtoNode is needed for all Protocols on BMK with EDGE[i] Controllers, including BACnet,
Modbus. If your installation includes a ProtoNode SSD (Client-Client Device), you must adhere
to the procedure listed below. Failure to complete these steps can result in the failure of the
BST system.
a) Do NOT install the ProtoNode device at the outset of the installation. If the ProtoNode device
is already installed, you must physically disconnect it from the Modbus network on the I/O
board.
b) Make sure that the Modbus load and bias resistors are properly configured for the system
to operate without the ProtoNode installed.
c) Temporarily set the BST system for Constant Setpoint mode of operation (see below).
d) Turn on and completely test the installation to verify that it is operating proper.
e) Once the installation is working properly as a BST system, install the ProtoNode device.
f) Make sure that the Modbus load and bias resistors are properly configured for the system
to operate with the ProtoNode installed.
g) Set the BST system for desired mode of operation (Setpoint mode).
h) Test the system completely with the ProtoNode installed.

7.2 BST QUICK START CHART

Select the single option that suites your installation and then complete the instructions in the
corresponding sub-sections of section 7.3 BST Implementation Instructions.
Constant Setpoint (choose option 1 or 2)
Option 1 – Direct Wired Header (Header Temp)
Option 2 – Modbus Header (Network)
Outdoor Reset (choose option 3 or 4)
Option 3 – Direct Wired Header AND Direct Wired Outdoor Air
Option 4 – Modbus Header AND Modbus Outdoor Air
Remote Setpoint (choose option 5 through 8)
Option 5 – 4-20ma Drive AND Direct Wired Header
Option 6 – Modbus Drive via ProtoNode AND Direct Wired Header
Option 7 – 4-20ma Drive AND Modbus Header
Option 8 – Modbus Drive via ProtoNode AND Modbus Header
OMM-0145_D • GF-218 •
11/2/2020
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Complete section 7.3.1
Complete section 7.3.2
Complete section 7.3.3
Complete section 7.3.4
Complete section 7.3.5
Complete section 7.3.6
Complete section 7.3.7
Complete section 7.3.8
Page 108 of 213