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Service Menu Parameters
97
Figure 90 Options setup, page 3 of 5
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.
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.
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.
Ball Valve Setpoint Offset—Adjusts the operating compressor discharge pressure by changing the
targeted range of control for units with motorized ball valves.
Heaters Outputs as (Liebert HPM only)—Activates the heater digital output based on the selected
event on units with no heaters.
CW Valve Control—For units equipped with dual motorized ball valves controlling flow to the
chilled water coil, this parameter allows the valves to be set to operate in parallel, alternate or
cascade. Parallel is the default selection and operates the valves at the same opening based on the call
for cooling.
Main Valve—Selects which valve is the lead valve if CW Valve Control is set for “Alternate or
Cascade.”
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.”
Valve Rotation Hour—Determines the time between the valve rotations if Auto Valve Rotation is
enabled.
Dehum Operation—Selects the dehumidification operation of the valves for units equipped with
dual motorized ball valves controlling flow to the chilled water coil.