Annunciator - CleaverBrooks CFC-500 Operation, Service And Parts Manual

Parameter
Postpurge time

ANNUNCIATOR

The Annunciator section monitors the status of a series string
of limits, control, and interlock contacts to enhance fault and
status messages.
The Annunciator's 8 inputs (A1–A8) along with the Interlock
(ILK), Load (Limit) Control Input (LCI), and Pre Ignition
Interlock (PII) inputs, provide a total of 11 monitored contact
components.
The Annunciator function is defined by a specific model
number.
Each Annunciator input has three parameters:
• Long Name: 20 characters long; name is displayed when
viewing the Annunciator status from a system display like
the 833-3577.
• Short Name: 3 characters long; used for status viewing by
more limited local displays, like the 833-3725. The short
name can also be used as part of a lockout or hold
message.
• Location: Each Annunciator terminal location may be
designated:
• LCI: Monitors a series of wired devices for load/limit
control.
• ILK: Monitors a series of wired devices in the
interlock string.
• PII: Typically a closed indicator switch (pre-ignition
interlock or also called a proof of closure switch)
located on a gas valve (but may include other
devices).
Table 31. Burner Control Safety Parameters. (Continued)
0 seconds to 5 minutes (MM:SS)
This parameter sets the burner control's postpurge time. Setting this parameter to zero
disables postpurge.
Comment
• Unused: not used
• Other: Used to Monitor a circuit, not related to any
of the above.
The input terminal names (Interlock [ILK], Load [Limit] Control
Input [LCI], Pre Ignition Interlock [PII]) can be renamed with a
long (20 character) and short (3 character) name that better
describes their purpose.
Three Annunciator terminals may already be assigned
functions based on the system parameter setup:
• A1: Will be Interrupted Air Switch (IAS) if the parameter is
enabled.
• A7: Will be High Fire Switch (HFS) if the parameter for
Purge Rate Proving parameter is enabled
• A8: Will be Low Fire Switch (LFS) if Lightoff Rate Proving
parameter is enabled.
CHECKOUT
Open equipment Control, Limits, and/or Interlock inputs. Check
that the Falcon reacts as programmed and annunciates the
point status properly.
Important: Restore ALL Controls, Limits, and Interlock
inputs altered above to proper operation.
DO NOT place jumpers wires across the installation controls,
limits and interlocks.
Annunciator Example
Fig. 26 is an example of wiring to the Annunciator terminals
and names that have been assigned for this example.
Note that the assigned terminals (LCI, ILK, and PII) are the last
interlocks in their category.
61
CB FALCON
750-265