IF THE MOTOR ROTATION IS NOT CLOCKWISE (as
viewed through the sight glass), reverse any 2 of the 3 in-
coming power leads to the starter and recheck rotation. Make
sure that oil pump rotation does not change.
Do not check motor rotation during coastdown. Rota-
tion may have reversed during equalization of vessel
pressures.
Check Oil Pressure and Compressor Stop
1. When the motor is up to full speed, note the differential
oil pressure reading on the LID default screen. It should
be between 18 and 30 psid (124 to 206 kPad).
2. Press the Stop button and listen for any unusual sounds
from the compressor as it coasts to a stop.
Calibrate Motor Current Demand Setting
1. Make sure that the compressor motor rated load amps in
the Service1 table has been configured. Place an ammeter
on the line that passes through the motor load current trans-
fer on the motor side of the power factor correction ca-
pacitors (if provided).
2. Start the compressor and establish a steady motor current
value between 70% and 100% (RLA) rated load amps by
manually overriding the guide vane target value on the
LID and setting the chilled water set point to a low value.
Do not exceed 105% of the nameplate RLA.
3. When a steady motor current value in the desired range
is met, compare the compressor motor amps value on the
Status01 table to the actual amps shown on the ammeter
on the starter. Adjust the amps value on the LID to the
actual value seen at the starter if there is a differ-
ence. Highlight the amps value then press SELECT .
Press INCREASE or DECREASE to bring the value
to that indicated on the ammeter. Press ENTER when
equal.
4. Make sure that the target guide vane position is released
into AUTOMATIC mode.
To Prevent Accidental Start-Up —
The PIC can be
set up so that start-up of the unit is more difficult than just
pressing the LOCAL or CCN softkeys during machine
service or when necessary. By accessing the Status01
table, and highlighting the chiller Start/Stop line, the value
can be overridden to stop by pressing SELECT and then
the
STOP
and ENTER softkeys. ‘‘SUPVSR’’ will ap-
pear after the value. When attempting to restart, remember
to release the override. The default machine message line
will also state that the Start/Stop has been set to ‘‘Start’’ or
‘‘Stop’’ when the value is overridden.
Check Machine Operating Condition —
Check to
be sure that machine temperatures, pressures, water flows,
and oil and refrigerant levels indicate that the system is func-
tioning properly.
Instruct the Customer Operator —
Check to be sure
that the operator(s) understand all operating and mainte-
nance procedures. Point out the various machine parts and
explain their function as part of the complete system.
COOLER-CONDENSER — Float chamber, relief devices,
refrigerant charging valve, temperature sensor locations, pres-
sure transducer locations, Schrader fittings, waterboxes and
tubes, and vents and drains.
ECONOMIZER — Float chambers.
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, LID operation, occupancy schedule, set
points, safety controls, and auxiliary and optional controls.
AUXILIARY EQUIPMENT — Starters and disconnects, sepa-
rate electrical sources, pumps, and cooling tower.
DESCRIBE MACHINE 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 main-
taining a leak-free machine.
SAFETY DEVICES AND PROCEDURES — Electrical dis-
connects, relief device inspection, and handling refrigerant.
CHECK OPERATOR KNOWLEDGE — Start, stop, and shut-
down procedures, safety and operating controls, refrigerant
and oil charging, and job safety.
REVIEW THE START-UP, OPERATION, AND MAINTE-
NANCE MANUAL
Fig. 26 — Correct Motor Rotation
46
Содержание 19EF Series
Страница 10: ...Fig 5 19EF Controls and Sensor Locations cont 10...
Страница 13: ...Fig 12 19EF Menu Structure 13...
Страница 14: ...Fig 13 19EF Service Menu Structure 14...
Страница 38: ...Fig 24 19EF Leak Test Procedures 38...
Страница 69: ...Fig 36 Electronic PIC Controls Wiring Schematic 69...
Страница 70: ...Fig 36 Electronic PIC Controls Wiring Schematic cont 70...
Страница 71: ...Fig 37 Machine Power Panel Starter Assembly and Motor Wiring Schematic 71...
