WaterFurnace CLW Chiller - Manual (Page 16)

16
CLW QUAD SERIES CHILLER INSTALLATION MANUAL
Control Features
Alarm Outputs
• The control has 18-enumerated status variable for each
compressor and the unit.
• Compressor Lockout
• Any compressor can be locked out from the local
display or using the HOA switch.
Motor & Oil Thermal Overload
• The motor thermal overload switch is a normally
closed (NC) switch that monitors the temperature of
the motor.
• This safety can be configured to auto reset or manual
reset (factory default).
Motor Rotation Direction
• The motor rotation direction switch is a normally
closed (NC) switch that monitors the rotation direction
of the motor.
Electrical Thermal Overload
• The electrical thermal overload switch is a normally
closed (NC) switch that monitors the electrical thermal
conditions of the wires leaving the main contactor.
• This safety can be configured to auto reset or manual
reset (factor default).
Flow Switches
• The optional flow switches are normally closed (NC)
switch that monitors the flow in the pipes into the
evaporator and condenser.
• This safety clears when flow is present.
Freeze Protection
• The optional freeze protection switch is a normally
closed (NC) switch that monitors the temperature of
the water in the pipe coming out of the evaporator for
freeze conditions.
• This safety can be configured to auto reset or
manual reset.
Low Refrigerant Saturation Temperatures
• The controller monitors the refrigerant saturation
temperatures for low saturation temperatures. Without
glycol, it is recommend to set the low saturation
temperature to 34°F and consider it an alarm condition
it the saturation temperature continuously remains
below that temperature for 90 seconds.
• The compressor will not restart until the low saturation
compressor delay time delay has been satisfied.
High Refrigerant Saturation Temperatures
• The controller monitors the refrigerant saturation
temperatures for high saturation temperatures. An
alarm condition occurs if the saturation temperature
exceeds the high limit.
• The compressor will not restart until the high saturation
compressor delay time delay has been satisfied.