Emerson Liebert iCOM, Manual

Page: 163 / 172

Service Menu Parameters
155 Liebert
®
iCOM
®
for Liebert DSE
™
Figure 140 Options setup, page 3 of 6
S424 CW Flush —Selects the number of hours between each chill water coil flush cycle. The default is
every 24 hours. Reducing this number will increase the number of coil flushes.
S425 Freecooling Flush —Selects how many hours between each free-cooling coil flush cycle. The
default is every 24 hours. Reducing this number will increase the number of coil flushes.
S426 Hot Water Flush —Selects how many hours between each hot water coil flush cycle. The
default is every 24 hours. Reducing this number will increase the number of coil flushes.
S427 Ball Valve Setpoint Offset —Adjusts the operating compressor discharge pressure by
changing the targeted range of control for units with motorized ball valves. The psi added here
increases valve sensitivity. The higher the number, the more the ball valve will open at a given
pressure.
S428 Heaters Outputs as (Liebert HPM ™ only)—Activates the heater digital output based on the
selected event on units with no heaters.
S429 CW Valve Control —Allows the valves to be set to operate in parallel, alternate or cascade for
units equipped with dual motorized ball valves controlling flow to the chilled water coil. Parallel is the
default selection and operates the valves at the same opening based on the call for cooling.
S430 Main Valve —Selects which valve is the lead valve if CW Valve Control is set for “Alternate or
Cascade.”
S431 Auto Valve Rotation —Allows the valves to be rotated based on the Valve Rotation Hour if CW
Valve Control is set for “Alternate or Cascade.”
S432 Valve Rotation Hour —Determines the time between the valve rotations if Auto Valve
Rotation is enabled.
S433 Dehum Operation —Selects the dehumidification operation of the valves for units equipped
with dual motorized ball valves controlling flow to the chilled water coil.