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UGH004/0999
microKool Portable Chillers
I
NSTALLATION
3-7
You can establish a normal operating range around the process
temperature setpoint using the high and low deviation parame-
ters. If the process temperature exceeds the high deviation
limit, or falls below the low deviation limit for longer than 15
minutes, the chiller will alert you to the unacceptable tempera-
ture variation with an alarm light.
These temperature deviation limits will adjust automatically
relative to the process temperature setpoint.
The factory default setting is the process temperature setpoint
± 10° F (6° C). This parameter is adjustable to establish a nar-
rower or wider acceptable temperature range for normal oper-
ation. You cannot set the Low Deviation below the factory-set
Low Safety temperature. The High Deviation cannot be set to
exceed the factory-set High Safety temperature.
To change the temperature deviation settings:
Press the Setpoint Select
button to select the deviation
parameter you want to
change.
Use the
▲
and
▼
setpoint
buttons to enter the deviation
temperature.
The setting is
stored in memory even when the
power is turned off. The recom-
mended setting is ± 2-10° F.
E
NTERING
S
ETPOINT
D
EVIATION
P
ARAMETERS
1
F
ACTORY DEFAULT SETTINGS
Model
MPW
MPA
Process Setpoint
50° F (10° C)
50° F (10° C)
High Safety
75° F (24° C)
75° F (24° C)
Low Safety
10° F (-12° C)
10° F (-12° C)
2
NOTE:
If you enabled passcode protection, you must enter
the passcode to change this parameter. See
E
NABLING AND
D
ISABLING
P
ASSCODE
P
ROTECTION
.
Too enter the passcode:
Hold down the Setpoint Select button for 5 seconds. When the
control displays “ 1 PaS”, use the setpoint adjustment buttons
to enter the passcode. Press the Setpoint Select button again.
If the correct passcode was entered the controller will display
ACC PAS for 3 seconds. If the passcode was incorrect, the
controller will display rEJ PAS (rejected passcode).
Access to system parameters remain until power is cycled or
the RUN or STOP button is pressed.
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