RS.8D.M2.22
AK2-SC 255 Reference Manual
18
ment, for this suction group.
PSIG Safety cutout
(-50.0 to 150.0) The gauge pressure at which the
controller will stop the compressors in this suction
group.
Adaptive suction control
(List box)
None: No adaptive suction control.
AK2-SC 255: Target pressure is adjusted based on
discharge temperature of a single fixture.
AKC 16x: Adaptive control of individual evaporators
by an AKC 164 or AKC 161 Smart Case Controller.
Sensor: Target pressure is adjusted based on any
sensor on the AKC 55 I/O network
Dynamic: The SC 255 analyzes the performance of
every case on each individual circuit, and adjusts target
pressure intelligently by using the case sensor that
varies most from the setpoint.
Bd-Pt
(For the first group, to the left of the hyphen, 01 to 99;
for the second group, to the right of the hyphen, 1 to 8).
The board and point address of the fixture sensor used
by the adaptive control algorithm. (Does not appear
when dynamic adaptive control is selected.) Note that
board and point numbers use a different format with
AK2 modules. See the AK2 I/O user manual for more
information.
Temp target
(-50.0 to 100.0) The temperature that the adaptive
control algorithm will seek to maintain in the fixture.
(Does not appear when dynamic adaptive control is
selected.)
Range +/-
(0.0 to 100.0) The dead band around the temperature
target. As long as the fixture temperature remains in
this range, the suction pressure target will not be
modified. (Does not appear when dynamic adaptive
control is selected.)
Maximum pressure float
(0 to 99.9) The number of psig that the adaptive
algorithm will be allowed to cumulatively add or
subtract from the suction pressure target.
Post defrost delay
(0 to 60) The number of minutes after termination of
defrost during which there will be no target adjustment.
(Does not appear when Sensor is selected as the type
of adaptive control.)
Allow float below target
(List box: Yes, No) Determines whether or not the
adaptive algorithm will be allowed to adjust suction
pressure below the target if fixture temperature is
above target tempe range.
Night setback
(List box: Yes, No) Determines whether or not suction
pressure will be offset according to a schedule to be
specified in the following lines.
Setback from time
(Time field) The start time for night setback.
Setback to time
(Time field) The ending time for night setback.
Setback days
(Days selection field) The days on which night setback
will be effective.
