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NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting22
Valve types
Path: Main > Setup > System # > System Config > Valve Types
Flow Switch.
Set the location of the optional flow switch in this System. The flow switch detects if
there is adequate liquid coolant (glycol or water) flow to maintain coil operation.
If the flow switch detects inadequate flow in a MultiCool or Economizer coil, it will switch the cool or
dehumidify mode to the direct expansion coil. If the flow switch detects inadequate coolant flow at the
heat exchanger it will disable the compressors.
The Flow Switch setting indicates where the flow switch is installed:
• DX—for the water or glycol line entering the heat exchanger (to maintain head pressure in DX
Systems).
• Multi—for the chilled water input to the MultiCool coil or chilled water coil (Systems using
chilled water only).
• None—for air-cooled Modules with no MultiCool coil.
Cndsr Vlv. The condenser fluid valve controls the flow of coolant into the heat exchanger or to the
Economizer coil. Set the condenser fluid valve as a three-way valve.
Note: Economizer valves are always three-way valves.
Coil Fluid. The coil fluid valve controls the flow of coolant to either the MultiCool, Chilled Water, or
Economizer coil. Set the coil fluid valve as a three-way valve.
Actuator types
Path: Main > Setup > System # > System Config > Actuator Types
Cndsr Vlv.
Set the type of condenser valve actuator; the actuator can be set as Flt Ctrl or None.
• Floating Control maintains the position of the valve when the power is off.
• None indicates that no condenser valve is installed. Air-cooled Systems with no external water
piping do not require a condenser valve actuator.
Coil Fluid. Set the coil fluid valve actuator to Flt Ctrl, or None.
• Floating Control maintains the position of the valve when the power is off.
• None indicates that the Module does not have a MultiCool or Economizer coil.
Flow Switch: Multi
Cndsr Vlv: 3-way
Coil Fluid: 3-way
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Cndsr Vlv: Floating
Coil Fluid: Floating
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