Ordering Information
Table 1 Product Numbers
110 Vac 50/60 Hz *
LFL1.133-110V LFL1.333-110V LFL1.335-110V LFL1.635-110V
220 Vac 50/60 Hz *
LFL1.133 LFL1.335 LFL1.635
Timing description
Pre-purge time 7.5 sec 26 sec 31 sec 55 sec
Pilot trial for ignition (PTFI) 2.5 sec 4 sec 4 sec
Main trial for ignition (MTFI) 2.5 sec 4 sec
Interval from the beginning of MTFI
until release to modulation
2.5 sec 10 sec 10.5 sec
Post purge time 12 sec 15 sec 12 sec
Flame failure response time (FFRT) 1 sec
*All times listed above are for 60 Hz operation. (Times for 50 Hz operation will be 20% longer.)
Description Product Number
LFL Control unit Refer to Table 1 above
(without wiring base)
Wiring base AGM410490550
Flame sensor
UV (shown) QRA 4.U
forward looking 3/4” NPT
UV Refer to
QRA2… , QRA10 … Technical Instruction 7712
Flame rod By others
Wiring Base
The wiring base provides the following:
• 24 Terminals ______________
• 3 Ground connections __________________--
• 3 Neutral connections,
connected to terminal 2
3/12
Siemens Building Technologies CC1N7451en
HVAC Products 11.15.2004
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