CFH Startup Guide
10
Part No. 750-293
Turn the control panel DEMAND switch to LOC (local). The burner
sequence should now begin. To verify that the sequence is in
progress, check the ‘Burner state’ display on the Operation screen. If
operating normally, the controller should advance through the steps
in the burner sequence (see
Figure 13
).
Note:
The <Burner switch> screen button enables the burner, but
will not by itself start the lightoff sequence. In order for the burner to
start, the following must be true:
• <Burner switch> screen button is ON
• All control circuit interlocks are satisfied
• A demand for steam exists (example: DEMAND switch is
on LOC and steam pressure is below setpoint)
Once started, the boiler will continue running until demand is met, an
alarm condition occurs, or until manually shut down.
Before leaving the boiler unattended, ensure all safety controls have
been checked and boiler operational settings are properly set,
As part of the initial safety checks, a flame failure test should also be
performed to verify that the controls are able to respond properly to a loss of flame: Disconnect the flame
rod cable and attempt to start the burner. The CB Falcon should lock out, indicating
Lockout 109 Ignition
Failure
. Reconnect flame rod cable after test.
The CB Falcon requires a manual reset to resume operation after a lockout.
3 - MANUAL OPERATION
Certain circumstances - such as setting combustion - require operating the boiler in manual mode. To enter
manual mode, use the following procedure:
1.On the CB Falcon
Operation
screen, press the
Firing Rate
display in the Modulation section.
2. A numeric keypad will appear, showing the current firing rate
and operating mode.*
3. Under
Firing rate control
select
Manual in Run
.
4. Press <Clear> to clear the current RPM value.
5. Enter the desired RPM setting using the numeric
keypad.
6. Press <OK>. The display will return to the Operation
screen and the burner will modulate to the chosen firing
rate.
*Use
Manual in Run
for normal manual operation. In
Manual in Run
and Standby
mode, the burner will not operate. Use this mode for
testing blower operation without firing the boiler.
Burner Sequence:
STANDBY
(burner switch off or no demand)
SAFE STARTUP
PREPURGE DRIVE TO PURGE
(prove fan
purge rate)
PREPURGE MEASURED PURGE TIME
(30 sec default)
PREPURGE DRIVE TO LIGHTOFF
(prove
lightoff rate)
PREIGNITION TEST
DIRECT BURNER IGNITION
RUN
(release to modulating control)
Figure 13 Burner Sequence
Figure 14
