NEW SIEMENS LFL1.335 220- 240V GAS CONTROL BOX- Boiler Programmer

Siemens LFL1.335 Burner Control

Overview

The LFL1.335 is a burner control designed for forced-draft burners and is commonly used in systems handling gas, oil, or dual-fuel operation.

It is described for intermittent operation, with controlled shutdown expected at least once every 24 hours, and it is used in burner arrangements that require dependable flame supervision and sequence control rather than simple on/off switching.

This model is especially relevant in combustion systems where start-up timing, flame establishment, and safe shutdown all need to be handled in a defined sequence.

In real plant use, a burner controller like this sits at the center of ignition logic, flame monitoring, and lockout behavior, so it is normally selected as a system-critical replacement rather than as a general electrical part. 

That practical role is consistent with its published use on medium- to high-capacity burners and with its support for direct spark flame or interrupted pilot arrangements.

Technical Data

Application Value

The LFL1.335 fits best in industrial burners, boiler equipment, thermal-process systems, air heaters, and burner panels that already use a dedicated combustion control sequence.

Published product material ties the family to medium- to high-capacity burners, including multistage or modulating systems, which makes it a practical choice where stable burner sequencing matters more than broad controller flexibility.

It also brings value in maintenance work because combustion systems tend to be highly sequence-dependent.

When a burner has already been designed around a specific controller family, keeping the same class of burner control usually helps preserve flame supervision behavior, startup timing, and shutdown logic with less recommissioning effort.

This is an engineering inference supported by the published timing references and burner-use context for the LFL1 family.

Replacement and Selection Perspective

For replacement work, the LFL1.335 should be matched by supply voltage, burner type, operating sequence, and flame-supervision method, not only by housing style. In combustion systems, incorrect sequence timing or mismatch with the burner arrangement can create startup faults or nuisance lockouts.

That is why users typically search this model by exact designation rather than by general burner-control appearance. 

This is an engineering inference based on the product’s published 110V class, timing references, and burner application scope.

FAQ

Q1: What kind of product is LFL1.335?
It is a burner control used to supervise and sequence forced-draft burner operation.

In practical terms, it manages the burner startup and safety chain rather than serving as a general-purpose relay module.

Q2: What applications fit it best?
It fits gas, oil, and dual-fuel burner systems, especially in medium- to high-capacity equipment where intermittent burner operation and flame supervision are part of the normal control strategy.

Q3: Why does exact controller matching matter on burner systems?
Because burner controls are sequence-dependent. Voltage class, purge timing, flame supervision, and shutdown logic all affect whether the burner starts and runs correctly.

A mismatch can lead to nuisance trips or unsafe behavior.

This is an engineering inference based on the published timing structure and burner-use description of the LFL1 family.

Q4: Is this model used for continuous operation?
It is described for intermittent operation, with at least one controlled shutdown every 24 hours.

That makes it more suitable for burner systems designed around cycling control rather than uninterrupted continuous burner duty.

Q5: What should be checked before ordering?
Check the installed model, supply voltage, burner type, ignition arrangement, and the control sequence already used in the burner panel.

Those items usually matter much more than physical similarity alone.

This is an engineering recommendation based on the published use cases and timing references for the LFL1 family.