Normal Operation
P
ower On
When the Power Switch / Disconnect is placed in the ON position, the Controller goes into a “Standby” mode.
Five decimal points (…..) will appear on the Controller’s displays.
CAUTION: DO NOT turn Controller power ON until the Reservoir has been filled. When Controller power is
turned ON, the pump automatically begins pumping. If Reservoir has not been filled, the pump may be
damaged.
Press the Controller’s Power Button. The system startup sequence will begin and proceed as follows:
• The pump will turn on and fluid will begin circulating through the system.
CAUTION: On initial startup or after long periods of inactivity, run the Chiller for 10 seconds, turn
power OFF, and restart five times to remove any air in the process lines.
• The set point temperature will appear briefly on the Temperature Display; after a few seconds, it will be
replaced by the actual fluid temperature. The right decimal point will flash while the set point is being
displayed.
• The system will go through a short initialization sequence.
• Once initialization has been completed, the compressor will begin operating. When the pressure in the
discharge line reaches 400 psi (27.6 bar), the fan will turn ON. Water-cooled units: The coolant water
regulating valve opens/closes to maintain the pressure in the discharge line at approximately 250 psi
(17.2 bar).
• The Controller will display the actual process fluid temperature and the appropriate ‘degrees’ LED will
be lit (C or F).
Temperature Unit (°C or °F) Selection / Factory Default Reset
The LEDs adjacent to the Temperature Display indicate the unit (°C or °F) used for Temperature Displays.
To change from °C to °F or vice versa, proceed as follows:
To change to °F
— Place the Power Switch / Disconnect in the OFF position. Press and hold the
Units/Menu Select Button while returning the Power Switch / Disconnect to the ON position.
To change to °C
— Place the Power Switch / Disconnect in the OFF position. Press and hold the
Power Button on the front panel while returning the Power Switch / Disconnect to the ON position.
IMPORTANT: Temperature set point and many other user-settable operating parameters return to the
original factory defaults when the temperature unit is changed. It is recommended that you record all user-
settings before changing the temperature unit or performing a factory default reset so that these operating
parameters can be restored easily to the desired values.
Units / Menu
Select Button
Pressure / Flow
Rate Display
Pressure / Flow Rate Unit
Select / Set Knob
Temperature Unit
Temperature
Display
Power Button
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