Technical information

Fast Responding System:
Select the fast setting “FSt” for small systems*. Less than 250
pounds of water (30 gallons) and 2,000 pounds of steel might
be considered a small system. This setting has the largest pro-
portional band (4ºF), which allows a fast response to small
deviations between the process variable and setpoint. This
system is typical for small chillers with small molds or other
process machinery. If improperly set up, the configuration
might cause oscillation around the setpoint temperature.
Setup Menu
To access the Setup Menu,
Press and hold the “enter” key for approximately
five seconds, until the service menu is active.
Toggle the Up/Down keys until “PiT” is dis
played. Press the “enter” key once to see the cur
rent tuning setting.
Toggle the Up/Down arrow keys to the desired
SLO, nOr or FSt setting. Press “enter” again to
save this value. If at any time not key is pressed for 10
seconds the control will return to “Home Page”, dis
playing the process variable. If the unit is in any alarm
condition, you must clear it before you can adjust the
tuning selector.
This feature allows you to set the time from when a low
refrigerant pressure alarm is sensed to when the alarm signals.
The range for this alarm is 0-60 seconds standard default
value is 5 seconds. This default value should be adequate for
all systems and should not need adjusted. This alarm can
cycle up to three times per hour before a latching shutdown
occurs. Once a latching shutdown occurs “PAL” will flash on
screen and the unit will need reset.
Press the Enter key until the default con-
figuration page Un appears on the screen.
Toggle up/down keys until until LP1 flash-
es on the display
Press Enter and use the up/down keys to
select your desired amount of time.
Press Enter to accept the units
4-10 OPERATION
Portable Chiller UGH024/1103
TIC TUNING
THE CHILLER
(PIT)
CONTINUED
1
2
3
TIC CONTROL
CHANGING THE
LOW PRESSURE
ALARM IGNORE
TIME (LP1)
1
2
3
4