FXII Chiller Revision: 05 March 25, 2013 8
currents but running currents must be less than the set point. To
disable this fault set the limit to 0.
o Low AC line detection: When set, if the AC line voltage remains
below the set value for 10 minutes, the control will turn off the
compressor or heater and indicate Low AC. Voltages may be set
between 75 and 100 VAC for 120 volt systems, and 175-200 VAC
for 208-230 VAC systems.
o High Limit Threshold: Set this parameter to monitor water outlet
temperature. Temperatures may be selected between 100°F and
135°F.
o System units: Degrees Fahrenheit (°F) or degrees Celsius (°C) can
be selected
o Cycled Sea Pump: This setting will turn on the sea pump with the
compressor. This parameter may be changed to run the Sea Pump
continuously.
o Electric Heat/ Reverse Cycle Heat: Set this parameter only if the
system is equipped with an electric heater. If the heater current
will exceed 10 Amps, a contactor must be connected to the valve
output to use this feature.
o Purge Air in System: This parameter allows the user to operate
the circulating pump for one hour while the system is being filled
so air can be removed. Set the parameter to YES and press the
On/Off button. The display will go blank then the screen saver will
appear with “PURGING AIR” on the screen. The circulating loop
water pump will run for 1 hour then turn off. To exit this function,
press the On/Off button. Flow faults are disabled while Purge Air
is active. Flow switch status may be viewed in the system status
screen. See Viewing System Status for details.
o Starter Present: Set this parameter to YES only if the EasyStart
option board is installed on top of the FXII power supply. This
option must be set for No for ALL other systems including
EasyStart systems where the EasyStart option board is NOT
installed on the FXII power supply such as those systems with
EasyStart in an external box.
o Reset parameters: To reset all parameters to factory defaults,
select YES and then exit the program mode by pressing the
joystick center button. The display will show EEPROM RESET
then the display will go blank indicating the unit is OFF.
Staging two compressors in a system:
In some applications, two compressors may be necessary to handle the cooling or
heating load. On these systems, remove jumper JP8 from one of the two power supplies.
(see Wiring Diagram and Configuration for jumper location details). With JP8 removed,
the second unit will operate at a different default set point and staging delay.
Defaults:
JP8 In: Cool 42°F, Heat 110°F, Staging Delay 15 Seconds
JP8 Out: Cool 44°F, Heat 108°F, Staging Delay 45 Seconds
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