Falcon Control Functions And Customer Interface - CleaverBrooks CFC Operation, Service & Parts Manual

Section 4 — CFC Commissioning
L. FALCON CONTROL FUNCTIONS AND
CUSTOMER INTERFACE
Following is a brief overview of the Falcon control features on
ClearFire boilers. Please refer to the Falcon Control operating
instructions in Appendix A for more detailed explanations.
• Set Point
• Time-of-Day (TOD) Set Point
• Hysteresis On and Hysteresis Off
• PID modulation control
• Remote Enable and Remote 4-20mA Input
• Remote Modulation
• Remote Set Point
• Rate Limiting/Override
• Configurable pump/auxiliary relay contacts
• Annunciator
• Diagnostics
• Lockout/Alarm History
• Trend Analysis
• Modbus communications
• Lead/Lag Control for up to 8 boilers
• DHW demand priority
Set Point, TOD Set Point, Hysteresis On, Hysteresis Off, and PID
load control
The set point is the value that the boiler's PID load control attempts
to maintain in order to meet system demand. The modulating set
point can be adjusted at the Operation page or under the Central
Heat Configuration parameter group. No password is required to
change the set point. To change the set point at the Operation page,
press the set point value next to "Normal". Clear the current value
and enter the new value. Press <OK> to establish the new set
point.
The Time-of-Day (TOD), or setback, set point is an alternative set
point that is enabled when a remote contact connected to terminals
J10-2 & J10-3 is closed (Refer to Figure 2-10 CFC wiring diagram).
When the circuit is open, the boiler control reverts back to the
normal set point. The TOD set point can be adjusted at either the
Operation page or under the Central Heat Configuration parameter
group. Service level password login may be required to change this
parameter.
The hysteresis on and hysteresis off points can only be changed
under the Central Heat Configuration parameter group and require
a login with the Service level password. Hysteresis on is the
differential below the current set point at which the boiler will
restart following an off cycle. Hysteresis off is the differential above
the current set point at which the boiler will cycle off – effectively
the boiler's operating limit. These two parameters apply to both the
normal and TOD set points. To minimize the frequency of cycling the
boiler on and off, the values of either, or both, of these settings may
be increased. Default settings for Hysteresis on and off are 5 deg F
and 15 deg F, respectively.
Part No. 750-263 4-29