CFH Startup Guide
Part No. 750-293
11
If any of the following conditions occur:
• Loss of flame
• Excessive or unusual noise
• Flame appears irregular when viewed through sight glass
• Frequent low water shutdowns
Cease boiler operation. See the Troubleshooting section in the CFH manual or consult your authorized CB
representative.
Repeated nuisance low water shutdowns may indicate a problem with the boiler feed system and/or water
level controls.
4 - POST STARTUP
• Review
Chapter 4 - Commissioning
in the CFH manual. Ensure all safety checks have been performed
according to instructions.
• Set high gas pressure switch to 50% higher than operating gas pressure at low fire. Set low gas pressure
switch to 50% lower than operating gas pressure at low fire.
• Check the draft on the outlet stack and compare to acceptable limits (-0.25 to +0.25 inches WC).
Operating outside of acceptable limits could result in light off and flame failure problems.
• Verify gas pressure remains within limits shown in Table 1.
• A new boiler should be cleaned by boil-out prior to being placed into service. See Chapter 4 of the CFH
manual for boil-out procedure.
5 - LOCKOUTS, HOLDS, AND ALERTS
To assist in monitoring boiler operation, the CB Falcon control system employs messages of three types:
Lockouts
,
Holds
,
and
Alerts
.
•
Lockouts
and
Holds
indicate interruptions in boiler operation, whether occurring as part of the normal
operating sequence or due to an abnormal condition. Lockouts require a manual reset to continue operation,
while Holds do not. A Hold will automatically clear when the hold condition is removed or satisfied.
The most recent Lockouts are stored in CB Falcon memory and may be accessed through the Lockout
History. Holds are not logged in memory.
Note:
Before attempting to restart the boiler after a Lockout, identify and correct the Lockout condition.
Notice
The CFH has been factory tested at 1000’ ASL and tuned for 5-6%
excess O
2
. To ensure optimum combustion throughout the firing
range, the O
2
% should be verified and if necessary adjusted to the
proper levels. This procedure involves manually firing the burner
while using a combustion analyzer to monitor O
2
%. Low and high
fire adjustments are made at the main gas valve. See the CFH
Operation and Maintenance manual for a detailed procedure.
Note:
If an alarm or lockout occurs
during startup or operation, see the
boiler Operation and Maintenance
manual
