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pressure value is set at the factory, but is user-adjustable. See Section 4.9 for information on
changing the maximum outlet pressure value.
4.7.5 Minimum Flow Rate (FL)
This is the minimum allowable flow rate and can be set in either GPM or LPM (the LED adjacent to
the display indicates the active unit of measure). Should the fluid flow rate drop below the minimum
flow rate value, the audio and visual alarms will activate and the compressor, heater, fan, and pump
will turn off.
To change the minimum flow rate value, rotate the Select/Set Knob until the desired flow rate value
is displayed on the temperature readout.
NOTE: When FL first appears, the GPM LED will be lit. To view or change the FL value in LPM,
press the Units/Menu Button again. The FL will remain on the display and the LPM LED will light.
With FL set to “0” the flow alarm is disabled and the chiller will continue to operate with the output
flow blocked.
Note: If flow rates are below 1.5 GPM this feature is not recommended as nuisance alarms may
result.
FL
•
GPM
0.8
FL
•
LPM
3.0
4.7.6 Maximum External / Internal Temperature Differential (Sd) (optional)
NOTE: This menu item (Sd) appears only when the remote temperature control probe is installed
and enabled (see Section 4.7.8). Values are always displayed in °C.
This value helps establish the cooling/heating rate when the remote temperature control probe is
being used. Maximum external/internal differential temperature values from 4° to 20°C may be
entered. The higher the setting, the more rapidly the Chiller will achieve the external temperature set
point. Low differential temperature settings minimize the amount of temperature
overshoot/undershoot that occurs when the measured external temperature reaches the external set
point temperature.
Sd
5.0
4.7.7 Auto-Refrigeration Temperature (AF)
This menu item allows you to select the temperature at which refrigeration is activated. To change
the displayed value, rotate the Select/Set Knob until the desired auto-refrigeration temperature is
displayed.
NOTE: This value is always displayed/set in °C.
AF
35.0
4.7.8 Remote Probe (rP)
NOTE: If an external temperature probe is not installed, NAP will be displayed when this menu item
is selected.
This menu item allows you to enable/disable the Chiller’s optional ambient temperature probe (AtC)
or remote temperature control probe (rPC).
If you wish to operate the Chiller using the ambient tracking probe, rotate the Select/Set Knob until
AtC is displayed. When this setting is selected, the cooling fluid temperature will be controlled at the
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