SECTION 2: INSTALLATION
•
•
•
2.14 BST Sequencing Isolation Valve Installation
All CFR units are pre-wired with a connection for an optional motorized
external sequencing isolation valve
(P/N
92084-TAB
). This valve is an integral component of AERCO
’s on-board Boiler Sequencing Technology
(BST) solution. BST allows sites with multiple boilers to have one boiler, designated the
“Manager,”
manage the other boilers at the site, designated as
“Clients” in such a way that the efficiency of the entire
boiler array is maximized.
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
open for a time interval defined in the
SH Valve Close Delay
parameter in the
Advanced Setup
→
BST
Cascade
→
Operating Controls
→
Sequencing Controls
menu (default = 1 minute), then closes.
NOTE:
SH Valve Close Delay
appears only if
Unit Mode
(in
Main Menu
→
Advanced Setup
→
BST Cascade
→
Cascade Configuration
) equals
BST Manager
.
Once the 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 pre-programmed Sequencing Isolation Valve control is available only from AERCO. It is
installed only on boilers that are part of a Boiler Sequencing Technology cascade. Refer to
OMM-0164
Section 7:
Boiler Sequencing Technology
for configuration.
Sequencing Isolation Valve Installation Instructions
1.
Install the sequencing isolation valve in the boiler’s hot water outlet pipe.
Figure 2-17: Sequencing Isolation Valve Installed
HOT WATER
OUTLET
AERCO
SEQUENCING
ISOLATION VALVE
Содержание AERCO CFR 3000
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