Bst Implementation Instruction; Option 1 Constant Setpoint: Direct Wired Header Temp Sensor - Watts AERCO Benchmark OMM-0136 Operation And Service Manual

Benchmark Platinum-Edge [II]: Operation-Service Manual
SECTION 7 – BOILER SEQUENCING TECHNOLOGY

7.3 BST Implementation Instruction

There are 8 BST implementation options, described below. The instructions for each refer to I/O
board connections on the Benchmark boilers, as described in Section 2.11.1 of Benchmark
Platinum-Edge: INSTALLATION Manual (OMM-0136, GF-210).
All instructions in the sections below refer to one or more of the following components:
•
Modbus Transmitter, either:
o P/N 24444-1 includes PT1000 Header Temp Sensor P/N 61058.
o P/N 24444-3 includes PT1000 Header Temp Sensor P/N 61058, box and power supply.
•
Header Temp Sensor: P/N 69195 (was 24410)
•
Outdoor Temp Sensor: P/N 61048

7.3.1 Option 1 Constant Setpoint: Direct Wired Header Temp Sensor

OPTION 1 Instructions: Constant Setpoint with Direct Wired Header Temp Sensor
HEADER TEMP SENSOR WIRING – BST MANAGER Unit
Step 1:
1. On the BST Manager unit, connect the Header Temp Sensor to the I/O board terminal
strip J3, terminals 4 (Supply Header +) and 5 (Supply Header –).
2. Ground the shield to any Shield terminal on the I/O board, such as terminal 3 or 8.
NOTES:
•
The Header Temp Sensor must be installed between 2 and 10 feet (0.61 and 3.1m)
downstream of the LAST boiler in the plant's supply water header.
•
Shielded pair 18 - 22 AWG cable is recommended for Header Temp Sensor wiring.
There is no polarity to be observed.
•
The ground for the shield is at the Shield terminal on the I/O the board. The sensor end
of the shield must be left free and ungrounded.
HEADER TEMP SENSOR
Step 2: OPTION 1 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.
OMM-0137_E • GF-211 •
12/13/2019
→ →
Advanced Setup
→ →
Advanced Setup
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
3 Shield
4 Supply Header +
5 Supply Header –
I/O board Strip J3
→
BST Cascade Cascade
→
BST Cascade Cascade
Configuration:
Communication:
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