CleaverBrooks CFC-500 Operation, Service And Parts Manual page 101

Overrun Time - keeps the pump running for a short time after the
input turns off or demand is satisfied
Output Connection - selects Pump A, B, or C
Cycle Count - one cycle counter for each pump output; can be
reset if a pump is replaced
Pump Control - selects Auto or Manual control
A Pump Exercise routine helps to prevent pumps from freezing up
due to long periods of inactivity. Configurable parameters are Pump
Exercise Interval (days) and Pump Exercise Time (minutes). Any
pump that remains off for the Pump Exercise Interval will be turned
on for the duration given by Pump Exercise Time.
The relays may be configured for various other functions, including
isolation valves, damper interlocks, operating status, etc.
Annunciator
The Annunciator monitors the Falcon control circuit to provide fault
and status messages, and also provides first out annunciation for
interlock lockouts. Eight inputs are available in addition to the
Interlock, Load Control, and Pre-Ignition Interlock inputs, totalling
11 monitored points.
Lead/Lag Control (up to eight boilers)
Multiple CB Falcon units can be connected in a lead/lag system.
Controllers in a lead/lag configuration communicate over the Global
Modbus network.
One CB Falcon in the lead/lag network hosts the Master function,
which coordinates the activities of the Slave units (individual
Falcons, including the one hosting the Master) via Modbus. The
Master uses its host controller's header and outdoor temperature
sensors to receive control input information and to maintain the
optimum setpoint
Boiler sequencing, on/off staging, and firing rate allocation are user-
configurable.
MASTER
SLAVE
Figure 4-12 Falcon Lead/Lag
Refer to Falcon manual (Appendix A) or to the Falcon Lead/Lag
manual (750-302) for additional information.
Part No. 750-263
SLAVE SLAVE SLAVE
Section 4 — CFC Commissioning
4-31