CleaverBrooks CFC-E 1000, Manual, Page: 7 / 61

BOILER BOOK CFC-E PRODUCT OFFERING
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Figure 3. ClearFire CE Control Panel
4. Forced Draft Burner
A. The burner is a “Pre-mix” design consisting of a unitized venturi, single body dual safety gas
valve, blower, and burner head. Consistent fuel-air ratio is maintained with a self-regulating
gas valve-venturi system which automatically compensates for changes in air density.
B. Full modulation is accomplished with a variable speed fan for 5:1 turndown ratio.
C. For near flameless combustion, the burner utilizes a Fecralloy-metal fiber head.
D. Noise level at maximum firing is less than 70 dBA regardless of boiler size.
E. Operating on Natural Gas, NOx emissions will be less than 20 PPM regardless of boiler size.
F. As an option, the burner is capable of direct vent combustion.
G. Ignition of the main flame is via direct spark, utilizing high voltage electrodes and a UV
scanner for flame supervision.
H. To ensure adequate combustion air is present prior to ignition, and to ensure the fan is
operating, a combustion air proving switch is furnished.
I. A High Air Pressure Switch is provided to ensure burner lockout if excessive back pressure
due to a blocked stack occurs.
J. For ease of maintenance and inspection, the burner is furnished with hydraulic rods and easy
opening lockdown nuts, which permit the burner to swing up. This provides full access to the
burner and electrodes, as well, to the tube sheet and tubes.
K. Supports direct vent combustion air.
5. Burner Gas Train
The standard gas train is equipped in accordance with UL certification and complies with ASME
CSD-1. Each burner gas train includes:
• Low Gas Pressure Interlock, manual reset.