AERCO C-More Controls Manual June 2010 - Manual (Page 118)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
Page 118 of 162 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 04/22/14
GF-112 Phone: 800-526-0288 OMM-0032_0E
The BST On Delay is the minimum amount of time BST will wait before turning on two
successive boilers. Once any boiler is ignited by BST, the time value entered in BST On Delay
must elapse before another boiler can be ignited.
This BST On Delay is a constant MINIMUM wait time between successive boiler ignitions. The
PID will decide when to attempt to turn on another boiler.
BST Max Boilers (Span = 1 – 8, Default = 8)
The value entered in BST Max Boilers will determine the maximum number of boilers allowed to
be ignited at any one time (regardless of the number of available boilers).
BST On Timeout (Span = 15 seconds – 300 seconds, Default = 60 seconds)
The BST On Timeout is the amount of time BST will allow a boiler to successfully light off once
an light off command has been issued for that boiler. If the commanded boiler has not
successfully ignited within the allotted BST On Timeout time, BST will attempt to light off a
replacement boiler.
Valve Override (Selections = Off – Open – Closed, Default = off)
Valve Override allows the user to manually control an Isolation Valve as follows:
• Off– Valve Override is disabled and BST will automatically control the Isolation Valve.
• Open – Valve Override is enabled and the Isolation Valve is Opened.
Note! The valve will remain opened as long as the Valve Override feature is set to Open.
Care must be taken to insure that this mode is turned Off during normal BST operation.
• Closed – Valve Override is enabled and the Isolation Valve is closed ONLY if the boiler
is NOT ignited.
Valve Off Delay (Span = 0 min – 15 min, Default = 1 min)
Valve Off Delay is the time an open Isolation Valve will remain open once a boiler has been
cycled off. When an ignited boiler is cycled off, its’ Isolation Valve will remain open for the
specified Valve Off Delay time in order to dissipate residual heat in the heat exchanger.
BST Sequencing (Default = Run Hours)
The BST Sequencing feature allows the user to define the LEAD and LAG units based on the
following selections:
• Run Hours
The Lead and Lag Boilers selection will be determined, in real time, by each unit’s
accumulated Run Hours.
• Unit Size
The Lead and Lag Boilers selection will be determined by the unit size. In this mode, the
lower unit sizes will be defined as Lead units and be lit off first.
NOTE! In the event of multiple units with the same size, the BST will default to Run
Hours to determine Lead and Lag units.
• Select Lead / Select Lag
The Lead and Lag Boilers will be selected by the user via the C-More Keypad.