Table 48: Programmable
Button Access Description
Present Date Operator
Allows the user to specify the present date. This value is
critical to logging system shutdowns accurately and for
utilizing the scheduling capabilities. When prompted to
enter a date value, the user must enter the day, month,
and four-digit year (using leading zeroes as necessary). If
within range, the value will be accepted. If out of range, the
user is prompted for the information again. At this point the
user may retry the date entry, or cancel the programming
attempt.
Present Time Operator
Allows the user to specify the present time. This value is
critical to logging system shutdowns accurately and for
utilizing the scheduling capabilities. When prompted to
enter a time value, the user must enter the hour and minute
desired (using leading zeroes as necessary). If the chiller is
presently set to 24-hour mode, the time must be entered
in the 24-hour format. Otherwise, the user must also select
AM or PM for the entered time. If out of range, the user
is prompted for the information again. At this point the
user may retry the time entry, or cancel the programming
attempt.
Clock (Enabled /
Disabled)
Operator
Allows the user to enable or disable the real-time clock in
order to conserve battery life. The clock will be disabled
during manufacturing and must be enabled at system
commissioning. In addition, when preparing for prolonged
shutdown the clock should once again be disabled.
12/24 Hr Operator
Allows the user to specify the format in which the time will
be presented. This setpoint affects the display of the time on
the chiller panel and on all reports generated. The 12-Hour
time format will include the AM and PM modifiers and show
the range of time between 1:00 and 12:59, while the 24-Hour
time format will show the range of time between 0:00 and
23:59.
Change Settings Operator
Used to enter the following setpoints. Pressing this key
places a green selection box around the first changeable
setpoint. The access level determines which setpoints can
be changed. Use the ▲ and ▼ buttons to place the selection
box around the desired setpoint. With the setpoint selected,
press the ENTER (tick) button. A dialog box appears with the
range of settings.
Line Voltage Service
Allows a service technician to program the applicable supply
line voltage.
Line Frequency Service
Allows as service technician to program the line frequency to
50 Hz or 60 Hz.
YMC
2
Mod B with OptiView
™
Control Center
74
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