4
6
4
Manufacturing Inc.
ACL
PILOT
The terminals 27 & 28 provide power to the pilot solenoid valve to allow gas for
initial ignition and flame sensing. The voltage to this output is the same voltage
supplied to the controller. This output has a low power feature for the solenoids
provided by an onboard solenoid driver circuit. This circuit can reduce power
consumption of solenoids as much as 80% power reduction. This circuit also helps
eliminate any noise that may be produced by some solenoids, and helps extend
the life of the solenoids. To utilize onboard solenoid driver, see dip switch settings.
The terminals 25 and 26 provide power to the main solenoid valves. Power to
these terminals are present only 10 seconds after pilot flame is present and
shutdowns are satisfied. This output also has the same low power feature of the
onboard solenoid driver.
The terminals 23 and 24 provides power to the main solenoids through the
temperature 1 setting. This allows for an individual temperature control of one of
the main solenoids eliminating unnecessary stroking of the main safety shutdown
valves to control main gas to the burner for temperature control. This output also
has the low power feature of the onboard solenoid driver.
T-MAIN
INTERMITTENT
PILOT
(Pilotless)
MAIN
OUTPUT CONNECTIONS
The ACL CSC 200 controller provides this feature for applications where a
continuous pilot may not be desirable. The pilot output is only energized when the
controller is calling for heat. In this case, the pilot turns on, then after 10 seconds
the main and T main outputs become energized. This allows for a low fire start
through the main burners or a pilot/main start where an individual pilot and main
are used. This is only initiated if the on/off switch is in the on position and all
shutdowns and POC are closed.
When continuous pilot (C) is selected via (dip switch settings) the pilot output
becomes energized when the on/off switch is turned to on, and all shutdowns and
POC are clear and permissive, regardless of whether the controller is calling for
heat.
Intermittent pilot (I) or Continuous pilot (C) features can be accessed through the
dip switch settings. See dip switch diagram, indicated by I /C.
PILOTLESS OR CONTINUOUS PILOT FEATURE
CONTINUOUS
PILOT
ACL CSC 200 Combustion Safety Control
