gas, oil, and dual fuel, single burner applica-
tions.
The LFL… is applicable for on-off, multi-
stage or modulating burners. The LFL… is
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
Contents
Control Interface .................................................2
Installation...........................................................2
Ordering information ...........................................3
Wiring base.........................................................3
Specifications .....................................................4
Specifications continued .....................................5
Description of oper controls ................................6
Ladder diagram external connections.................7
Sequence Dial OPERATION ..............................8
Sequence Dial FAULT and LOCKOUT...............9
Sequence Chart................................................10
Dimensions.......................................................11
11.15.2004
Siemens Building Technologies
HVAC Products
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