CleaverBrooks CFC-500 Operation, Service And Parts Manual page 181

Parameter
NTC sensor type
LCI enable
PII enable
Interlock start check
IAS start check enable
ILK/IAS open response
ILK bounce detection enable
Interrupted air switch (IAS)
enable
Prepurge time
Table 31. Burner Control Safety Parameters.
10K dual safety, 12K single non-safety, 10K single non-safety
This parameter determines whether 10K or 12K sensors are used for the Inlet, Outlet, DHW
header, Stack, and Outdoor analog sensor inputs. Falcon Steam Control has Stack sensor
option only.
This parameter also determines whether dual sensors are used with a cross-check for the
Outlet, Stack, and DHW sensors. If "10K dual safety" is chosen, these three sensors are each
dual 10K sensors, and if they do not track within 6°F then recycle and hold occurs, until the
sensors are tracking again.
Enable, Disable
If the LCI input is enabled, then the control will check the LCI as a recycle limit. It must be on
before the burner control will exit the Standby condition and LCI will cause a recycle if it turns
off at other times. If this input is off and demand is present, the burner control will indicate that
it is waiting for LCI so the Annunciator can provide a corresponding value in the Annunciator
Hold parameter, for use by a display.
Enable, Disable
If the PII input is enabled, then the control will check the PII as a preignition interlock limit. (As
defined by the equipment setup, it typically must be on before the burner control will exit the
Standby condition.) If this input is off and the burner control is in a hold condition waiting for it
to turn on, then the burner control will indicate that it is waiting for PII so that the Annunciator
can provide a corresponding value in the Annunciator Hold parameter, for use by a display.
Enable, Disable
If the Interlock start check is enabled and the fan is off (in some cases it can be on during
Standby), then the control will check the ILK input as it exits the Standby condition, in
response to demand. If this input is on then the burner control will hold for 120 seconds
waiting for it to turn off. If this hold time expires and the ILK is still on, then a lockout occurs.
Enable, Disable
If the Interrupted Air Switch Enable parameter is set to "Disable" then this parameter is
ignored. Otherwise, if the IAS start check is enabled and the fan is off (in some cases it can
be on during Standby), then the control will check the IAS input as it exits the Standby
condition, in response to demand. If this input is on then the burner control will hold for 120
seconds waiting for it to turn off. If this hold time expires and the IAS is still on, then a lockout
occurs.
Lockout, Recycle
During prepurge after a delay to establish airflow, and during Ignition, MFEP, and Run, the
burner control requires the ILK to remain on. If it opens during Ignition, MFEP, or Run then
this parameter determines the response: either a lockout or a recycle back to the Safe Start
check.
If recycle is selected and ILK is open during prepurge: the purge timer is set to zero and the
prepurge state holds at time zero, waiting for the ILK to reclose which will resume purge
timing. If this hold persists for 30 seconds then the control will go to a Standby Delay
condition for 5 minutes, then try again.
If the burner control is in a hold condition (but not a Standby Delay) waiting for ILK to turn on,
then the burner control will indicate that it is waiting for ILK so that the Annunciator can
provide a corresponding value in the Annunciator Hold parameter, for use by a display.
Enable, Disable
Disable, Purge Only, Purge & Ignition
This parameter determines when the IAS input is tested. If set to "Disable" then the IAS input
is ignored by the burner control, and may be used as an Annunciator input. If set to "Purge
Only" then IAS is monitored in the same way as the ILK input, with the same responses,
during the Prepurge state. If set to "Purge & Ignition" then IAS is monitored in the same way
as the ILK input, with the same responses, during the Prepurge and Ignition states. The IAS
in not monitored during Run.
MM:SS
This parameter sets the burner control's prepurge time. Setting this parameter to zero
disables prepurge.
Comment
57
CB FALCON
750-265