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MANUFACTURER
CABLE NO.
Alpha
2413 or 5463
American
A22503
Belden
8772
Columbia
02525
When connecting the CCN communication bus to a sys-
tem element, a color code system for the entire network is
recommended to simplify installation and checkout. The fol-
lowing color code is recommended:
SIGNAL
TYPE
CCN BUS CONDUCTOR
INSULATION COLOR
PSIO MODULE
COMM 1 PLUG (J5) PIN NO.
+
RED
1
Ground
WHITE
2
–
BLACK
3
Check Starter
BE AWARE that certain automatic start arrangements
can engage the starter. Open the disconnect ahead of
the starter in addition to shutting off the machine or pump.
Use the instruction and service manual supplied by the
starter manufacturer to verify that the starter has been in-
stalled correctly.
The main disconnect on the starter front panel may not
deenergize all internal circuits. Open all internal and re-
mote disconnects before servicing the starter.
Whenever a starter safety trip device activates, wait at least
30 seconds before resetting the safety. The microprocessor
maintains its output to the 1CR relay for 10 seconds after
starter safety shutdown to determine the fault mode of
failure.
MECHANICAL-TYPE STARTERS
1. Check all field wiring connections for tightness, clear-
ance from moving parts, and correct connection.
2. Check the contactor(s) to be sure they move freely. Check
the mechanical interlock between contactors to ensure that
1S and 2M contactors cannot be closed at the same time.
Check all other electro-mechanical devices, e.g., relays,
timers, for free movement. If the devices do not move
freely, contact the starter manufacturer for replacement
components.
3. Some dashpot-type magnetic overload relays must be filled
with oil on the job site. If the starter is equipped with
devices of this type, remove the fluid cups from these mag-
netic overload relays. Add dashpot oil to cups per in-
structions supplied with the starter. The oil is usually shipped
in a small container attached to the starter frame near the
relays. Use only dashpot oil supplied with the starter. Do
not substitute.
Factory-filled dashpot overload relays need no oil at start-up
and solid-state overload relays do not have oil.
4. Reapply starter control power (not main chiller power) to
check electrical functions. When using a reduced-voltage
starter (such as a wye-delta type) check the transition timer
for proper setting. The factory setting is 30 seconds
(±5 seconds), timed closing. The timer is adjustable in a
range between 0 and 60 seconds and settings other than
the nominal 30 seconds may be chosen as needed (typi-
cally 20 to 30 seconds are used).
When the timer has been set, check that the starter (with
relay 1CR closed) goes through a complete and proper
start cycle.
SOLID-STATE STARTERS
This equipment is at line voltage when AC power is con-
nected. Pressing the Stop button does not remove volt-
age. Use caution when adjusting the potentiometers on
the equipment.
1. Check that all wiring connections are properly termi-
nated to the starter.
2. Verify that the ground wire to the starter is installed prop-
erly and is of sufficient size.
3. Verify that the motors are properly grounded to the starter.
4. Check that all of the relays are properly seated in their
sockets.
5. Verify that the proper ac input voltage is brought into the
starter per the certified drawings.
6. Verify the initial factory settings (i.e., starting torque, ramp
potentiometers, etc. are set per the manufacturer’s
instructions.
Oil Charge —
If oil is added, it must meet Carrier’s speci-
fication for centrifugal compressor usage as described in the
Scheduled Maintenance, Oil Specification section (page 77).
On hermetic machines, add oil through the oil drain charg-
ing valve (Fig. 3, Item 26). A pump is required for adding oil
against refrigerant pressure. The pumping device must be
able to lift from 0 to 150 psig (0 to 1034 kPa) or above unit
pressure. On open-drive machines, oil may be added through
the oil drain and charging valve (Fig. 2, Item 18) using a
pump. However, an oil charging elbow on the seal-oil return
chamber (Fig. 6) allows oil to be added without pumping.
The seal oil return pump automatically transfers the oil to
the main oil reservoir.
Oil should only be charged or removed when the machine
is shut down. Maximum oil level is the middle of the upper
sight glass.
Power Up the Controls and Check the Oil Heater
—
Ensure that an oil level is visible in the compressor be-
fore energizing controls. A separate disconnect energizes the
oil heater and the control circuit. When first powered, the
LID should display the default screen within a short period
of time.
The oil heater is energized by powering the control cir-
cuit. This should be done several hours before start-up to
minimize oil-refrigerant migration. The oil heater is con-
trolled by the PIC and is powered through a contactor in the
power panel. Starters contain a separate circuit breaker to
power the heater and the control circuit. This set up allows
the heater to energize when the main motor circuit breaker
is off for service work or extended shutdowns. The oil heater
relay status can be viewed on the Status02 screen on the LID.
Oil sump temperature can be viewed on the LID default screen.
SOFTWARE VERSION — The software version will al-
ways be labeled on the PSIO module, and on the back side
of the LID module. On both the Controller ID and LID ID
display screens, the software version number will also
appear.
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Содержание 17
Страница 13: ...Fig 6 Open Drive 17 Series Lubrication Cycle 13 ...
Страница 15: ...Fig 7 17EX Controls and Sensor Locations 15 ...
Страница 16: ...Fig 7 17EX Controls and Sensor Locations cont 16 ...
Страница 17: ...Fig 7 17EX Controls and Sensor Locations cont 17 ...
Страница 19: ...Fig 8 19EX Controls and Sensor Locations cont 19 ...
Страница 23: ...Fig 16 17 19EX LID Menu Structure 23 ...
Страница 24: ...Fig 17 17 19EX Service Menu Structure 24 ...
Страница 50: ...Fig 28 17 19EX Leak Test Procedures 50 ...