Profire Ev/Lnev Burner; Description; Combustion Air Handling System; Firing Head - CleaverBrooks FLX Series Operation, Service And Parts Manual

A. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
B. Combustion Air Handling System . . . . . . . . . . . . .2-1
C. Firing Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
D. Oil System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
E. Gas System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
F. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
G. FGR System - Low NOx Applications . . . . . . . . .2-6
H. Burner Maintenance . . . . . . . . . . . . . . . . . . . . . . . .2-7
A. Description
The Profire EV Series burners are designed to operate with
gas, light oil, or a combination. All burners feature ignition by
spark-ignited gas pilot flame. With either fuel, the burner
operates with full modulation. A switch permits changeover
from automatic fully modulated firing to manually set firing
at any desired rate between minimum and maximum.
Additional safeguards assure that the burner always returns to
the minimum firing position for ignition.
EV Series burners are designed for automatic, unattended
operation except for periodic inspection and maintenance.
After selecting the proper overload settings for the starter, the
rest of the control panel components require little attention
except for occasional cleaning.
B. Combustion Air Handling System
The combustion air handling system consists of two major
components:
Damper assembly - A rotary damper regulates the
combustion air volume and is positioned by a modulating
motor. The damper is normally almost closed in the low fire
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CHAPTER 2

Profire EV/LNEV Burner

position and opens as the burner drives toward a high fire
position.
Motor driven impeller - The diameter of the impeller
determines available air pressure and the width determines air
capacity in cubic feet per minute. Alternate motor-impeller
combinations are available for 50 cycle or 60 cycle power and
for firing against either moderate or high furnace pressure.
All standard impellers are sized for up to 2,000 ft. altitudes.
Alternate impeller wheels are available. For higher altitudes,
motor and impeller combinations are determined at the
factory.
C. Firing Head
Access to the firing head is provided by swinging open the
impeller housing. For low NOx systems, disconnect the FGR
duct.
An internal gas pilot is standard on all burners. Pilot gas
pressure is adjusted at the pilot pressure regulator.
EV Firing Head
2-1