Initial Start-Up - Carrier 23xl Start-Up, Operation And Maintenance Instructions Manual

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
light the CHILLER START/STOP parameter. Override the cur-
rent START value by pressing the
softkey followed by the
STOP
SUPVSR! displays on the CVC indicating the override is in
place.
To restart the chiller the STOP override setting must be re-
moved. Access the MAINSTAT screen and using
softkeys highlight CHILLER START/STOP. The
PREVIOUS
3 softkeys that appear represent 3 choices:
• — forces the chiller ON
START
• STOP — forces the chiller OFF
• — 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 47.
The default CVC screen message line indicates which com-
mand is in effect.
Check Chiller Operating Condition —
be 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 — Float chamber, relief valves, re-
frigerant charging valve, temperature sensor locations, pressure
transducer locations, Schrader fittings, 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 actu-
ator, 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 sen-
sors, 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, CVC operation, occupancy schedule,
set points, safety controls, and auxiliary and optional controls.
AUXILIARY EQUIPMENT — Starters and disconnects,
separate electrical sources, pumps, and cooling tower.
DESCRIBE CHILLER CYCLES — Refrigerant, motor
cooling, 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 refrigerant.
A chiller STOP
or softkeys, high-
PREVIOUS
SELECT softkey. Press the
softkey. The word
ENTER
NEXT
softkey. For
ENTER
Check
Ensure the op-
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.
OPERATING INSTRUCTIONS
Operator Duties
1. Become familiar with the chiller and related equip-
ment before operating the chiller.
2. Prepare the system for start-up, start and stop the
or
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
functions.
Prepare the Chiller for Start-Up —
steps described in the Initial Start-Up section, page 65.
To Start the Chiller
to
1. Start the water pumps, if they are not automatic.
2. On the CVC default screen, press the
softkey to start the system. If the chiller is in
CCN
the OCCUPIED mode and the start timers have
expired, the start sequence will start. Follow the proce-
dure described in the Start-Up/Shutdown/Recycle
Sequence section, page 47.
Check the Running System —
sor starts, the operator should monitor the CVC display and ob-
serve the parameters for normal operating conditions:
1. The oil sump temperature should be 20 to 40 F (11 to
20 C) above the condenser refrigerant temperature. At
start-up, the oil sump temperature will rapidly
decrease. It will then slowly rise to the compressor dis-
charge temperature. After start-up, the minimum oil
sump temperature should be 20 F (11 C) above the
condenser refrigerant temperature. The oil sump tem-
perature is dependent upon the compressor discharge
refrigerant temperature.
2. When the compressor is running, the oil sump should
3
be at least
the separator sight glass.
3. The oil pressure displayed on the CVC default screen
is equal to the difference between the oil pressure and
evaporator pressure transducer readings. Typically the
reading will be 4 to 20 psi (28 to 138 kPa) [1.4 to 7 psi
(9.7 to 48.3 kPa)] at initial start-up until oil pressure
ramp up is complete. The full load reading is approxi-
mately 120 psi (821 kPa) [78 psi (538 kPa)].
4. The moisture indicator (dry-eye) sight glass on the
refrigerant motor cooling line should indicate refriger-
ant flow and a dry condition.
5. The condenser pressure and temperature varies with
the chiller design conditions. Typically the pressure
will range between 100 and 210 psig (690 to
1450 kPa) [60 to 135 psig (329 to 780 kPa)] with a
corresponding temperature range of 60 to 105 F (15 to
41 C). The condenser entering water temperature may
be controlled below the specified design entering
66
After the compres-
/ full. The liquid level should be visible in
4
Follow the
or
LOCAL