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6. Press NEXT to highlight the holiday table that you
wish to view or change. Each table is one holiday pe-
riod, starting on a specific date, and lasting up to 99 days.
7. Press SELECT to access the holiday table. The Con-
figuration Select table now shows the holiday start month
and day, and how many days the holiday period will last.
8. Press
NEXT
or
PREVIOUS
month, day, or duration.
9. Press
SELECT
to modify the month, day, or
duration.
10. Press INCREASE or DECREASE to change the se-
lected value.
11. Press ENTER to save the changes.
12. Press EXIT to return to the previous menu.
EF/EX/FA CHLR HOLDY01S
Holiday Start Month
Start Day
Duration (days)
NEXT
Fig. 21 — Example of Holiday Period Screen
to highlight the
CONFIGURATION
SELECT
0
0
0
PREVIOUS
SELECT
EXIT
START-UP/SHUTDOWN/
RECYCLE SEQUENCE (Fig. 22)
Local Start-Up —
is initiated by pressing the LOCAL menu softkey which is
on the default LID screen. Local start-up can proceed when
Time Schedule 01 is in OCCUPIED mode, and after the in-
ternal 15-minute start-to-start and the 1-minute stop-to-start
inhibit timers have expired.
The chiller start/stop status point on the Status01 table may
be overridden to start, regardless of the time schedule, in
order to locally start the unit. Also, the remote contacts may
be enabled through the LID and closed to initiate a start-up.
Whenever the chiller is in LOCAL control mode, the PIC
will wait for Time Schedule 01 to become occupied and the
remote contacts to close, if enabled. The PIC will then per-
form a series of pre-start checks to verify that all pre-start
alerts and safeties are within the limits shown in Table 3.
The run status line on the LID now reads ''Starting.'' If the
checks are successful, the chilled water/brine pump relay will
be energized. Five seconds later, the condenser pump relay
is energized. One minute later the PIC monitors the chilled
water and condenser water flow switches, and waits until the
WATER FLOW VERIFY TIME (operator configured, default
5 minutes) to confirm flow. After flow is verified, the chilled
water/brine temperature is compared to CONTROL POINT
plus DEADBAND. If the temperature is less than or equal to
this, the PIC will turn off the condenser pump relay and go
into a RECYCLE mode. If the water/brine temperature is
high enough, the start-up sequence continues on to check
the guide vane position. If the guide vanes are more than 6%
open, the start-up waits until the PIC closes the vanes. If the
vanes are closed, and the oil pump pressure is less than 3 psi
(21 kPa), the oil pump relay will then be energized. The PIC
then waits until the OIL PRESS (Pressure) VERIFY TIME
(operator configured, default 15 seconds) for oil pressure to
reach 15 psi (103 kPa). After oil pressure is verified, the PIC
waits 10 seconds, and then the compressor start relay (1CR)
is energized to start the compressor.
Failure to verify any of the requirements up to this point
will result in the PIC aborting the start and displaying the
applicable pre-start mode of failure on the LID default screen.
A pre-start failure does not advance the starts in 12 hours
counter. Any failure after the 1CR relay has energized re-
sults in a safety shutdown, advances the starts in the
12 hours counter by one, and displays the applicable shut-
down status on the LID display.
Shutdown Sequence —
occur if any of the following events happen:
• the STOP button is pressed for at least one second (the
alarm light will blink once to confirm stop command)
• recycle condition is present (see Chilled Water Recycle Mode
section)
• time schedule has gone into UNOCCUPIED mode
• remote contact opens
• the start/stop status is overridden to stop from the CCN
network or the LID
34
Local start-up (or a manual start-up)
Shutdown of the machine can
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