DuraChill DCA203C4, Operator'S Manual

Page: 21 / 43

110-275 20
High Temperature Limit (HL)
This menu item serves two functions. First, it establishes the maximum allowable set point temperature and thus
helps prevent an operator from inadvertently selecting a temperature set point above a pre-established value.
Secondly, it serves as a high temperature alarm, automatically activating both audio and visual alarm indicators if
the measured fluid temperature reaches the HL setting. This also causes the compressor, heater, fan, and pump
to turn off.
To change the high limit value, rotate the Select/Set Knob until the desired value is displayed.
HL 35
Low Temperature Limit (LL)
This menu item also serves a dual function. First, it establishes the minimum allowable set point temperature and
thus helps prevent an operator from inadvertently selecting a temperature set point below a pre-established value.
Secondly, it serves as a low temperature alarm, automatically activating both audio and visual alarm indicators if
the measured fluid temperature drops to the LL setting. This also causes the compressor, heater, fan, and pump
to turn off.
To change the low limit value, rotate the Select/Set Knob until the desired value is displayed.
LL 0.0
High Ambient Temperature Limit (HA)
NOTE:
This value is always set in °C.
This menu item protects the Chiller from overheating due to a high ambient temperature. Should the ambient
temperature rise above the limit value, the audio and visual alarms will activate and the compressor, heater, fan,
and pump will turn off.
To change the high ambient temperature value, rotate the Select/Set Knob until the desired value is displayed on
the Temperature Readout.
HA 40
Maximum Fluid Pressure (FP)
This is the maximum allowable fluid pressure and can be set in either PSI or kPa (the LED adjacent to the display
indicates the active unit of measure). Should the fluid pressure rise above the maximum fluid pressure value, the
audio and visual alarms will activate and the compressor, heater, fan, and pump will turn off.
To change the fluid pressure limit value, rotate the Select/Set Knob until the desired value is displayed on the
Temperature Readout.
NOTE:
When FP first appears, the PSI LED will be lit. To view the FP value in kPa, press the Units/Menu
Button again. The FP will remain on the display, and the kPa LED will light up.
FP
PSI
80