Installation Notes - Watts Aerco BENCHMARK 750 User Manual

Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
CHAPTER 9. BOILER SEQUENCING TECHNOLOGY

9.1.1 Installation Notes

If you are installing a BST system that also includes a ProtoNode SSD (Slave-Slave 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 in
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.
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11/03/2016
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
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