Lochinvar KNIGHT XL KBN600 - Manual (Page 4)

In commercial buildings requiring a multiple boiler system, modulating
operation of individual units should be sequenced so that the system
functions as an integrated whole.
SMART SYSTEM includes a built-in cascading sequencer for up to 8
KNIGHT XL units. This eliminates the initial cost and labor required
with installation of a separate sequencer. And, because it’s engineered
specifically for Lochinvar boilers, it removes any uncertainty about
using a ”third-party” sequencer, to ensure precise, dependable
cascading operation.
When utilizing the built-in cascading sequencer, KNIGHT XL boilers
communicate through a simple 2-wire daisy chain connection. On
demand, one boiler in the system functions as the leader, and
modulates with demand to capacity. The additional load then
”cascades” to the second boiler, which fires and modulates to meet
added demand via a patented process to match system load and
reduce equipment short cycling.
Cascading continues as additional boilers fire in sequence, until all
units are in operation or demand is satisfied. When demand drops,
the patented cascading process reverses, with the precision, control
and performance you expect from Lochinvar.
SMART SYSTEM also controls Lead-Lag Rotation. Every 24 hours the
lead boiler role is shifted to the next unit in the sequence. This rotation
ensures long life by distributing ”lead-lag” runtimes equally over each
unit in the system.
In commercia l buildings requ ir ing a
operation of individual un it s should
Including
a Built-in
Cascading
Sequencer!
Cascading contin ues as a dditional boilers fire in sequence, until all
Includin ng