York 160.87-OM1, Operation And Maintenance Manual

Page: 145 / 268

Table 141: Programmable
Button Access level Description
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. With the 031-03630-007 microboard this
setting may be changed but has no effect. The battery in the 03630
microboard will last for over 10 years.
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.
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.
12/24 Hr Operator
Allows the user to specify the format in which the time will be
presented to the user. This setpoint will affect the display of the
time on the chiller panel and on all reports generated. 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 or
higher
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 ▼ keys to place the selection box around the desired setpoint.
With the setpoint selected, press the Enter key. A dialog box appears
with the range of settings.
Chilled
Liquid Pump
Operation
Service
Allows a Service Technician to select Chilled Liquid Pump control
contacts (I/O Board TB2-44/45) operation as either standard or
enhanced.
145 YK-EP Style B Centrifugal Chiller