42
JOHNSON CONTROLS
FORM 150.68-ICOM1
ISSUE DATE: 10/15/2020
ENTRY KEYS
The Entry Keys allow the programmed values to be
viewed and changed.
UP and DOWN ARROW Keys
Used in conjunction with the OPER DATA and
HISTORY keys, the UP arrow and DOWN arrow keys
allow the user to scroll through the data messages.
The UP arrow and DOWN arrow keys are also used for
programming the control panel when changing setpoints,
setting the daily schedule, changing safety setpoints, unit
options, and setting the clock.
ENTER/ADV Key
The ENTER key must be pushed after any change is
made during programming to enter the new value into
memory. If the ENTER key is not pressed after a value is
changed, the changes will not be entered and the original
values will be used to control the unit.
SETPOINTS KEYS
Programming and viewing the cooling and heating
setpoints, daily schedule, and safeties is accomplished
by using the SETPOINTS keys.
Setpoints
Cooling Setpoint
The cooling SETPOINT and RANGE can be viewed or
programmed by pressing the SETPOINTS key (Refer to
Setpoint and Cut-out Settings). After pressing the key
the SETPOINT and RANGE entry message is displayed:
C SETP = XX.X
o
F
RANGE = +/- X.X
o
F
The above message shows the current chilled water
temperature SETPOINT at XX.X°C. Pressing the UP
arrow or DOWN arrow will change the SETPOINT in
0.1° increments. The ENTER/ADV key must be pressed
to enter the SETPOINT into memory and advance to
the RANGE.
The cursor will move under the current RANGE setting.
Pressing the UP arrow or DOWN arrow will change the
setting between 1.5°F to 4.5°F in 0.1°F increments. The
ENTER/ADV key must be pressed to enter the range
into memory.
The RANGE setting takes into account the number of
compressors on the unit and the temperature dierence
between leaving (LCHLT) and return chilled liquid at
full load.
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