Daylight Saving Time Configuration; Start-Up/Shutdown/Recycle; Sequence; Local Start-Up - Carrier AquaEdge 19XRV series Operation, Maintenance And Installation Manual
Single-stage or two-stage
semi-hermetic centrifugal liquid chillers
with pic iii controls and hfc-134a
50/60 hz
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Also See for AquaEdge 19XRV series:
- Start-up, operation and maintenance instructions manual (160 pages) ,
- Installation instructions manual (76 pages) ,
- Start-up and service instructions (40 pages)
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the sole time broadcaster (if one is so enabled). See the TIME
BROADCAST ENABLE section.
The broadcast function must be activated for the holidays
configured on the HOLIDEF screen to work properly.
Access the BRODEF screen from the EQUIPMENT
CONFIGURATION table and select ENABLE to activate the
function. Note that when the chiller is connected to a CCN
Network, only one chiller or CCN device can be configured as
the broadcast device. The controller that is configured as the
broadcaster is the device responsible for transmitting holiday,
time, and daylight-savings dates throughout the network.
To access the BRODEF screen, see the SERVICE menu
structure, Fig. 21.
To view or change the holiday periods for up to 18 different
holidays, perform the following operation:
1. At the Menu screen, press
to access the
SERVICE
Service menu.
2. If not logged on, follow the instructions for Attach to
Network Device or To Log Out. Once logged on, press
until Equipment Configuration is highlighted.
NEXT
3. Once Equipment Configuration is highlighted, press
to access.
SELECT
4. Press
until HOLIDAYS is highlighted. This is
NEXT
the Holiday Definition table.
5. Press
to enter the Data Table Select screen.
SELECT
This screen lists 18 holiday tables.
6. Press
to highlight the holiday table that is to be
NEXT
viewed or changed. Each table is one holiday period,
starting on a specific date, and lasting up to 99 days.
7. Press
to access the holiday table. The Config-
SELECT
uration Select table now shows the holiday start month
and day, and how many days the holiday period will last.
8. Press
or
to highlight the month,
NEXT
PREVIOUS
day, or duration.
9. Press
to modify the month, day, or duration.
SELECT
10. Press
or
to change the
INCREASE
DECREASE
selected value.
11. Press
to save the changes.
ENTER
12. Press
to return to the previous menu.
EXIT
a19-1624
Fig. 31 — Example of Holiday Period Screen
DAYLIGHT SAVING TIME CONFIGURATION — The
BRODEF table also defines Daylight Saving Time (DST)
changes. This feature is by default enabled, and the settings
should be reviewed and adjusted if desired. The following
line-item entries are configurable for both DST “Start” and
“Stop,” and they are defined in Table 8.
To disable the Daylight Savings Time function simply enter
0 minutes for “Start Advance” and “Stop Back.”
Table 8 — Daylight Saving Time Values
ITEM
DEFINITION
1 = January, 2 = February, …,
MONTH
12 = December.
DAY OF WEEK
1 = Monday,…, 7 = Sunday
1 = first occurrence of selected Day of
Week in the selected month, 2 = second
occurrence of the selected Day, etc. This
WEEK
is not necessarily what one would con-
clude from looking at a standard calendar.
For example, April 7, 2011, is Day 4 Week
1, but April 8, 2011, is Day 5 Week 2.
Time of day in 24-hour format when the
TIME
time advance or set back will occur.
“Advance” occurs first in the year, setting
the time ahead by the specified number of
ADVANCE/BACK
minutes on the selected date. “Back” sets
the time back by the specified amount
(later in the year).
START-UP/SHUTDOWN/
RECYCLE SEQUENCE (FIG. 32)
The timing of a normal start-up will
Local Start-Up —
change when Auto-Restart After Power Failure is enabled. See
the section on Auto-Restart After Power Failure. Local start-up
(or a manual start-up) is initiated by pressing the
LOCAL
menu softkey on the default ICVC screen. Local start-up can
proceed when the chiller schedule indicates that the CUR-
RENT TIME and CURRENT DATE have been established as
a run time and date, and after the internal timers have expired.
The timers include a 15-minute start-to-start timer and a 1-min-
ute stop-to-start timer, which together serve to prevent exces-
sive cycling and abuse of the motor. The value of these timers
is displayed as START INHIBIT TIMER and can be viewed on
the MAINSTAT and DEFAULT screens. Both timers must ex-
pire before the chiller will start. If the timers have not expired,
the RUN STATUS parameter on the MAINSTAT screen will
read TIMEOUT. If Auto-Restart After Power Failure is en-
abled, the start to start timer is now a maximum of 10 seconds,
and the stop to start timer is now a maximum of 10 seconds.
NOTE: The time schedule is said to be “occupied” if the
OCCUPIED ? parameter on the MAINSTAT screen is set to
YES. For more information on occupancy schedules, see the
sections on Time Schedule Operation (page 28), Occupancy
Schedule (page 47), and To Prevent Accidental Start-Up
(page 81), and Fig. 23.
If the OCCUPIED ? parameter on the MAINSTAT screen
is set to NO, the chiller can be forced to start as follows. From
the default ICVC screen, press the
and
MENU
STATUS
softkeys. Scroll to highlight MAINSTAT. Press the
SELECT
softkey. Scroll to highlight CHILLER START/STOP. Press the
softkey to override the schedule and start the chiller.
START
NOTE: The chiller will continue to run until this forced start is
released, regardless of the programmed schedule. To release
the forced start, highlight CHILLER START/STOP from the
MAINSTAT screen and press the
softkey. This
RELEASE
Page 61
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