LFL
Series
Burner Flame Safeguard Control
The LFL... is a compact electro-mechanical
primary flame safeguard control designed to
provide burner sequencing, automatic igni-
tion and continuous flame monitoring for
gas, oil, and dual fuel, single burner applica-
tions.
The LFL... is applicable for on-off, multi-
designed for direct main burner ignition,
intermittent or interrupted pilot operation.
The LFL... integrates the flame amplifier,
purge timer and sequencer in a single con-
trol. Flame supervision is accomplished
using UV sensor or flame rod detection.
Features
• Primary flame safeguard control
• Visual sequence indication
• Optional combustion air blower control
• Optional postpurge
• Preignition interlock
• Continuous flame monitoring,
including extraneous light detection
• UV sensor functional test
• Proven air switch function
• Proven high fire purge interlock
• Proven low fire ignition interlock
• Direct main burner ignition,
intermittent or interrupted pilot operation
• Integrated flame amplifier
• UV sensor or flame rod detector
• Lockout alarm terminal
• Local and optional remote reset
• Burner off - economy position
(fully closed air damper interlock)
• Unit fuse and spare fuse provided
11.15.2004
Technical Instructions
Contents
Installation........................................................... 2
Wiring base......................................................... 3
Specifications ..................................................... 4
Dimensions ....................................................... 11
Siemens Building Technologies
Document No. 7451US
LFL...
Rev. 2 November 15, 2004
HVAC Products