Fireye BurnerLogiX ZB110 Manual page 35

CUT IN (Cut In): This is the setpoint where the BurnerLogix will close its operating control when
operating as the Lag1 Boiler. This is a differential value that is subtracted from the Lag1 Setpoint
(LAG1 STPT). When this value is set to zero, the Lag Boiler will close its operating control con-
tacts at the programmed Lag Setpoint (LAG1 STPT).
CUT OUT (Cut Out): This is the Cut Out value the BurnerLogix will use during Lag1 Operation.
This is a differential value that is added to the Lag Setpoint LAG STPT). See SEQUENCE OF
OPERATION - OPERATING CONTROL section.
MOD RNG (Modulating Range): This is the Modulating Range the BurnerLogix will use during
Lag1 Operation. This is a differential value that is subtracted from the Lag1 Setpoint (LAG1
STPT). See SEQUENCE OF OPERATION - MODULATING CONTROL section.
STRT DLY (Lag To Start Delay): A time delay (0 to 15 minutes) from when the control variable
falls below the cut in value to when the burner is commanded to initiate a burner start cycle. The
object of this function is to allow the LEAD boiler time to recover from a change in load demand.
During this delay period, the display screen will indicate the starting delay time and count down to 0
as follows:
STANDBY
LAG1 DELAYED
LAG DLY (Lead to Lag Delay): When a BurnerLogix control is commanded to go from LEAD
Operation to LAG Operation (based on the status of terminal 16 or 21), LEAD operation will con-
tinue for this user settable delay (0 to 15 minutes) before switching to LAG operation. The purpose
for this delay is it allow sufficient time for the "New Lead" Boiler to prepare to meet demand. Dur-
ing this period the ALL-INFO display will indicate –
8.4P AUTO
LEAD>LAG1
MOD MAX (Modulator Motor Maximum): Both LAG 1 and LAG 2 allow the modulating motor
travel to be separately limited to a value of 0 to 100%. This can be useful where the maximum firing
rate for an alternate fuel needs to be limited. Another use may be limited firing during an off peak or
low fire use period, i.e. weekends, holidays, etc.
LAG CUT IN: The cut in setpoint (CUT IN) provides the two options for programming how the
Lag Boiler will respond to a call in demand. Programming the cut in setpoint to zero will close the
operating control at the Programmed Lag Setpoint for Steam Pressure or Hot Water (LAG1 STPT).
This would cause the lead and lag boilers to operate as shown in Figure 9. By programming a value
greater than zero for this setpoint, the user can program the Lag Setpoint for Steam Pressure or Hot
Water (LAG SP) the same as the Steam Pressure Setpoint (STM STPT) or Water Temperature Set-
point (WTR STPT) as the Lead Boiler. This would cause the lead and lag boilers to operate as
shown in Figure 12 and Figure 13.)
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FLM42
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