Benchmark Platinum-Edge [ii]: Installation Manual
SECTION 2
– INSTALLATION
OMM-
136_G • GF-210 • 8/20/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
42
of
62
When operated with the BST system, the BST Manager controls its own isolation valve and
sends signals to BST Clients to open or close their isolation valves. After boiler load is satisfied,
its isolation valve remains opens for a time interval defined in the
SH Valve Close Delay
parameter (see
Main Menu
→
Advanced Setup
→
BST Cascade
→
Operating Controls
→
Sequencing Controls
; default = 1 minute), then closes.
Once system load is satisfied and all Client units have stopped firing, the BST Manager opens
the isolation valves of all Client units.
The implementation of BST, and the installation and use of this valve, is optional. However,
when BST is implemented
,
use of this valve is
strongly recommended
.
Installation consists of installing the sequencing isolation valve in the hot water outlet pipe, and
then connecting it to the pre-wired connector on the shell harness, as described below.
NOTE:
The Sequencing Isolation Valve control is a pre-programmed valve, and is available only
from AERCO. It is installed only on boilers that are part of a Boiler Sequencing Technology
group. Refer to Section 7:
Boiler Sequencing Technology
in the
Benchmark Platinum-Edge:
OPERATION-SERVICE Manual
(OMM-0137, GF-211)
for configuration instructions.
Sequencing Isolation Valve Installation Instructions
1. Install the sequencing isolation valve in the
boiler’s hot water outlet pipe.
Figure 2-13: Sequencing Isolation Valve Installed
2. Find the grey cable
inside the unit’s enclosure with the unused Molex connector with a cap
containing a jumper wire inserted in it (the jumper wire allows units that do not have a
sequencing isolation valve to operate normally). The other end is connected to the I/O
board and to a power supply.
MOLEX CONNECTOR
CAP
HOT WATER
OUTLET
AERCO
SEQUENCING
ISOLATION
VALVE
JUMPER
