Ch Hydronic Loop Demand And Rate; Burner Demand Priority Control - CleaverBrooks CFC Operation, Service & Parts Manual

CB FALCON
The burner demand priority control block implements a priority scheme according to the descriptions of the parameters shown as
providing input to this block. The implementation is:
DETERMINE IF DHW DEMAND SHOULD IGNORE AN ANTI SHORT CYCLE (ASC) DELAY...

CH Hydronic Loop Demand and Rate

The CH (Central Heating) Hydronic Demand and Rate source
compares a selected input sensor to a setpoint.
Burner demand will exist if the sensor temperature falls below
the setpoint minus a hysteresis value. Once the burner
demand signal is on, it remains on until the sensor temperature
750-265
Fig. 7. Burner demand priority control.
is above the setpoint plus a hysteresis value, or until the other
selected demand source input (e.g., Stat, Remote Stat) if any,
turns off.
Pump demand may be driven by the selected demand source
input (Stat input, a remote stat, or by the sensor alone).
A Proportional-Integral-Differential (PID) controller operates to
generate the demand source's requested modulation rate.
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