Chapter 4 — CFC Commissioning
4-12 Part No. 750-263
G.BURNER SEQUENCE
In addition to providing modulation control, the CB Falcon is
responsible for flame supervision and burner sequencing.
The CFC boiler uses direct spark ignition (no gas pilot) to light the
main flame. Flame sensing is accomplished with a flame rod, or
ionization electrode.
Basic burner sequencing (Central Heat):
1. Heat request detected (Setpoint minus On Hysteresis); LCI demand
detected (terminal J6 3).
2. The CH pump is switched on.
3. After a system Safe Start Check, the Blower (fan) is switched on after a
dynamic ILK switch test (if enabled).
4. After the ILK input is energized, 10 sec. allowed for IAS input
(combustion air proving) to energize, and purge rate proving fan RPM is
achieved - prepurge time is started.
5. When 30 sec. purge time is complete, the purge fan RPM is changed to
the lightoff speed.
6. As soon as the fan-rpm is equal to the light-off RPM , the Trial for Ignition
(4 sec.) or Pre-Ignition Time is started (depending on configuration).
1. Press <Begin>
2. Press <Yes>
3. Reset CB Falcon
Confirming Safety Parameter changes
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