Page 15
NOL Compact Modulating
F
LAME
F
AILURE
& S
EQUENCE
C
ONTROL
The standard control box fitted to the NOL
Modulating series of burners is the Landis & Staefa
type LAL1.
The unit is designed to provide control and
supervision for atomising oil burners of medium
to large capacity. They are suitable for use on multi
stage and modulating burners.
For safety reasons, at least one controlled
shutdown must be provided within each 24 hour
period of continuous operation.
When a burner failure is encountered the box goes
into lockout mode. This is indicated by an orange
neon, which displays within the lockout window
of the control and is repeated at the lockout lamp
on the panel facia.
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If a lockout situation occurs, the burner will not
start until it is manually reset by pressing the
lockout window on the control. (The control can
also be reset by the off/on/reset switch situated on
the control panel facia)
If the burner fails to fire and persists in locking out,
no more than three attempts should be made.
To
do so may create a
dangerous situation.
If a burner becomes troublesome then the
assistance of a qualified commissioning engineer
should be obtained. To assist in his diagnosis, notes
should be made detailing the events leading up to
the lockout situation. The symbol appearing in the
lockout window should also be noted prior to
resetting the burner.
(Refer to theSequence Diagram
and Timing Chart below).
PLEASE NOTE.
When the control box goes to
lockout it is generally performing the function it is
designed for.
Burner Control Program
Burner operational sequence based on the Landis
& staefa LAL1.25 Control box. Note. Timings are
for operation on a 50 hz electrical supply only.
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All pumps are set for 2 pipe (suction & return) system.
Refer to pages 6&8 for single pipe (gravity feed) connection.
