ACL 5100 Installation Manual page 6

ACL 5100 COMBUSTION SAFETY CONTROL
S/D INPUTS
REMOTE S/D
(STOP)
REMOTE START
PROOF OF
CLOSURE
(P.O.C)
SYSTEM ON
LIGHT
ALARM LIGHT
ALARM STATUS
ACL
Manufacturing Inc.
The shutdown input provides a means of connecting other shutdown devices
such as low level, high temperature, low gas and high gas shutdowns for
additional protection. A jumper is installed at the factory and should only be
removed to utilize this feature. Shutdown devices connected (in series) to the
shutdown terminal, must be dry contacts
operating conditions. If any of the S/D switches go to fault condition, their
contacts will open, de-energizing the solenoid outputs and shutting down fuel to
the pilot and main burners and disabling the re-light sequence. This will be
indicated by the alarm light flashing. Once the fault condition is corrected the
system can be restarted by pressing the stop/reset and then the start buttons.
Note: if a restart is attempted without clearing the fault condition, the controller
will not attempt a re-light. Do not run shutdown loop wire in the same conduit
solenoid wiring. Induced voltage may damage sensitive circuit board
components.
The remote S/D function is available when the jumper is removed and a
momentary normally closed contact button or remote relay contact (N/C) is
utilized. Note: Must be dry contacts.
The remote start function is available when a momentary normally open contact
button or remote relay contact (N/O) is utilized. When contacts close
momentarily the unit initiates starting sequence.
This feature allows controller to use valves with proof of closure switches for
ensuring main valve is closed before initiating an ignition. When valve switch
contacts are in an open state indicating the valve may be open, the controller will
not start. The contacts must be closed in order for controller to start. Once start
is initiated, the contacts from proof of closure switch can then change state.
The system on light indicates power supplied to the ACL 5100. When it is
flashing it indicates there has been a power failure.
A solid light indicates the pilot has failed to ignite. A flashing light indicates a
shutdown is open.
Alarm status is provided from a set of normally open/normally closed
contacts which change state when a pilot flame is detected. If the pilot goes out
due to any of the shutdowns or fails to re-light, the contacts return to normal or
alarm state.
and be in a closed state during normal
4
4 6
Note: Must be dry contacts.
dry
as