Check Oil Pressure And Compressor Stop; To Prevent Accidental Start-Up; Check Chiller Operating Condition; Instruct The Customer Operator - Carrier AquaEdge 19XRV series Operation, Maintenance And Installation Manual

Check Oil Pressure and Compressor Stop

1. When the motor is at full speed, note the OIL PRES-
SURE reading on the ICVC default screen. Normal
19XRV oil pressure readings are between 18 and 30 psid
(124 to 207 kPad). The oil pressure should be between 18
and 40 psid (124 to 276 kPad) on Frame 3 compressors
equipped with rolling element bearings.
2. Press the Stop button and listen for any unusual sounds
from the compressor as it coasts to a stop.
To Prevent Accidental Start-Up —
override setting may be entered to prevent accidental start-up
during service or whenever necessary. Access the MAINSTAT
screen and using the
NEXT
highlight the CHILLER START/STOP parameter. Override the
current START value by pressing the
the STOP softkey followed by the
word SUPVSR! displays on the ICVC indicating the override
is in place.
To restart the chiller, the STOP override setting must be
removed. Access the MAINSTAT screen and using
or softkeys highlight CHILLER START/STOP.
PREVIOUS
The 3 softkeys that appear represent 3 choices:
• — forces the chiller ON
START
• — forces the chiller OFF
STOP
• — puts the chiller under remote or schedule
RELEASE
control
To return the chiller to normal control, press the
softkey followed by the
RELEASE
more information, see Local Start-Up, page 61.
The default ICVC screen message line indicates which
command is in effect.
Check Chiller Operating Condition —
sure that chiller temperatures, pressures, water flows, and oil and
refrigerant levels indicate the system is functioning properly.
Instruct the Customer Operator —
erator(s) understand all operating and maintenance procedures.
Point out the various chiller parts and explain their function as
part of the complete system.
COOLER-CONDENSER — Economizer (if present), float
chamber, relief valves, refrigerant charging valve, temperature
sensor locations, pressure transducer locations, Schrader fit-
tings, waterboxes and tubes, and vents and drains.
OPTIONAL PUMPOUT STORAGE TANK AND PUMP-
OUT SYSTEM — Transfer valves and pumpout system,
refrigerant charging and pumpdown procedure, and relief
devices.
MOTOR COMPRESSOR ASSEMBLY — Guide vane ac-
tuator, transmission, motor cooling system, oil cooling system,
temperature and pressure sensors, oil sight glasses, integral oil
pump, isolatable oil filter, extra oil and motor temperature
sensors, synthetic oil, and compressor serviceability.
MOTOR COMPRESSOR LUBRICATION SYSTEM —
Oil pump, cooler filter, oil heater, oil charge and specification,
operating and shutdown oil level, temperature and pressure,
and oil charging connections.
CONTROL SYSTEM — CCN and LOCAL start, reset,
menu, softkey functions, ICVC operation, occupancy schedule,
set points, safety controls, and auxiliary and optional controls.
A chiller STOP
or softkeys,
PREVIOUS
softkey. Press
SELECT
ENTER softkey. The
NEXT
softkey. For
ENTER
Check to be
Ensure the op-
AUXILIARY EQUIPMENT — Disconnects, separate elec-
trical sources, pumps, and cooling tower.
DESCRIBE CHILLER CYCLES — Refrigerant, motor cool-
ing, lubrication, and oil reclaim.
REVIEW MAINTENANCE — Scheduled, routine, and ex-
tended shutdowns, importance of a log sheet, importance of
water treatment and tube cleaning, and importance of maintain-
ing a leak-free chiller.
SAFETY DEVICES AND PROCEDURES — Electrical
disconnects, relief device inspection, and handling refriger-
ant.
CHECK OPERATOR KNOWLEDGE — Start, stop, and
shutdown procedures, safety and operating controls, refrigerant
and oil charging, and job safety.
REVIEW THE START-UP OPERATION, AND MAINTE-
NANCE MANUAL
NOTE: Manuals and notebooks should not be stored under the
VFD power module as they will block airflow into the power
module cooling fan. Remove the manuals if they were placed
under the power module during shipping.

OPERATING INSTRUCTIONS

Operator Duties

1. Become familiar with the chiller and related equipment
before operating the chiller.
2. Prepare the system for start-up, start and stop the chiller,
and place the system in a shutdown condition.
3. Maintain a log of operating conditions and document any
abnormal readings.
4. Inspect the equipment, make routine adjustments, and
perform a Control Test. Maintain the proper oil and
refrigerant levels.
5. Protect the system from damage during shutdown periods.
6. Maintain the set point, time schedules, and other PIC III
functions.
Prepare the Chiller for Start-Up —
described in the Initial Start-Up section, page 80.

To Start the Chiller

1. Start the water pumps, if they are not automatic.
2. On the ICVC default screen, press the
softkey to start the system. If the chiller is in the
CCN
OCCUPIED mode and the start timers have expired, the
start sequence will start. Follow the procedure described
in the Start-Up/Shutdown/Recycle Sequence section,
page 61.
Check the Running System —
sor starts, the operator should monitor the ICVC display and
observe the parameters for normal operating conditions:
1. The oil reservoir temperature should be above 120 F
(49 C) during shutdown.
2. The bearing oil temperature accessed on the COMPRESS
table should be 120 to 165 F (49 to 74 C) for compressors
using journal bearings, and up to 175 F (79 C) for Frame
3, Frame 4, Frame 5, and Frame E compressors equipped
with rolling element bearings. If the bearing temperature
reads more than 180 F (83 C) with the oil pump running,
stop the chiller and determine the cause of the high tem-
perature. Do not restart the chiller until corrected.
3. The oil level should be visible anywhere in one of the two
sight glasses. Foaming oil is acceptable as long as the oil
pressure and temperature are within limits.
81
Follow the steps
or
LOCAL
After the compres-