154
JOHNSON CONTROLS
FORM 201.21-NM4 (1020)
154
JOHNSON CONTROLS
TECHNICAL DATA
CHILLER ELECTRONIC COMPONENTS
KEYPAD
An operator keypad allows complete control of the
system from a central location. The keypad offers a
multitude of command keys on the left and right side of
the keypad to access displays, program setpoints, history
data, and initiate system commands. Most keys have
multiple displays that can be accessed by repetitively
pressing the key or by pressing the ▲,▼,◄, and ►
(ARROW) keys. The keypad utilizes an overlay to
convert the keypad to various languages.
LD10605
The keypad also contains keys in the center section for
data entry in the various program modes. These keys
are listed below:
• 0-9 Keys
NUMERIC KEYPAD
• ●
PERIOD/DECIMAL
•
+/-
PLUS/MINUS
• √
ENTER
• X
CANCEL
•
▲ UP ARROW
•
▼ DOWN ARROW
•
◄ LEFT ARROW
•
► RIGHT ARROW
The numeric keys allow keying numeric values into
memory.
The ● (PERIOD/DECIMAL) key allows keying a
decimal point into numeric values.
The +/- (PLUS/MINUS) key allows making numeric
values negative.
The √ (ENTER) key stores program changes into
memory.
The X (CANCEL) key is used to cancel the data entry
operation and returns the programmed value to the
original value, before any programming changes were
made, when an error is made.
The ▲ (UP ARROW) and ▼ (DOWN ARROW)
keys allow scrolling backward (▲) and forward (▼)
through items to be programmed under keys such as the
PROGRAM or OPTIONS key.
The ▲ (UP ARROW) and ▼ (DOWN ARROW) keys
also allow scrolling forward (▼) or backwards (▲)
through data display keys that have multiple displays
under keys such as UNIT DATA, SYSTEM DATA, HIS-
TORY, PROGRAM, OPTIONS, etc. The arrow keys
can be used instead of repeatedly pressing the data key
to see the multiple displays under a key. Once the ▲
▼ (ARROW) keys are pressed and used for scrolling,
pressing the original data key will return to the first display
message displayed under the data (UNIT DATA,
SYSTEM DATA, etc.) keys.
The
◄
►
(LEFT & RIGHT ARROW) keys allow scroll-
ing between non-numeric program choices under the
OPTION, DATE/TIME, and SCHEDULE keys.
The
◄
(LEFT ARROW) key allows programming the
default value when programming numeric values. For
changing numeric values, the
►
(RIGHT ARROW) key
has no function.
The
◄
►
(ARROW) keys also allow scrolling side-
ways between the same displays on different systems.
For example: Pressing the
►
(RIGHT ARROW) key
while viewing the system #1 suction pressure moves the
display to system #2 suction pressure.
