Carrier 23XL Spezifikationen PDF herunterladen (Seite 50)

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 5 seconds (±1

second), timed closing. The timer is adjustable in a range

from 0.1 to 30 seconds and settings other than the nomi-

nal 5 seconds may be chosen as needed (typically 3 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.

BENSHAW, INC. 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 of the starting torque and

ramp potentiometers are set per the note on the schematic

for the starters.

NOTE: The potentiometers are located at the lower left

hand corner on the circuit board mounted in front of the

starter power stack (Fig. 36 and 37). The board is turned

on its side so that the 9:00 o’clock position is located where

the 6:00 o’clock position would normally be located.

The starting torque potentiometer should be set so that

when the PIC calls for the motor to start, the rotor should

start to turn. The nominal dial position for a 60 Hz motor

is approximately in the 11:30 position. The dial position

for 50 Hz motors is approximately in the 9:30 position

when the board is turned on its side so that the 9:00 o’clock

position is located where the 6:00 o’clock position would

normally be located. The ramp potentiometer should be

set that so the motor is up to full speed in 8 to 10 seconds,

the bypass contactors have energized, and the auxiliary

LCD is energized.

7. Proceed to apply power to the starter.

8. The Power +15 and Phase Correct LEDs should be on. If

not, see the Troubleshooting Guide, Solid-State Starter

section.

Oil Charge — If oil is added, it must meet Carrier’s speci-

ﬁcation for screw compressor usage as described in the Chang-

ing Oil and Oil Filter section on page 64. Charge the oil through

the oil charging valve. The oil must be pumped from the oil

container through the charging valve due to higher refrig-

erant pressure. The pumping device must be able to lift from

0 to 200 psig (0 to 1380 kPa) or above unit pressure. Oil

should only be charged or removed when the machine is

shut down.

All oil ﬁlter isolation valves should always be left open,

except when changing the oil, or oil ﬁlter as deﬁned in

the Changing Oil and Oil Filter section, page 64.

Power Up the Controls and Check the Oil Heater

NOTE: Frame 1 and 2 machines include an oil heater.

Frame 4 machines do not use an oil heater.

Ensure that an oil level is visible in the oil sump section

before energizing controls. A circuit breaker in the starter

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 table on the LID.

Oil sump temperature can be viewed on the LID default screen.

Minimum oil sump temperature set point when the com-

pressor is shut down is 140 F (60 C).

NOTE: The PSIO software version will always be labelled

on the PSIO module and on the back of the LID module.

The PSIO software version number will also appear on both

the Controller ID and LID ID display screens.

Set Up Machine Control Conﬁguration

Do not operate the machine before the control conﬁgu-

rations have been checked and a control test has been

satisfactorily completed. Protection by safety controls

cannot be assumed until all control conﬁgurations have

been conﬁrmed.

As conﬁguration of the 23XL machine is performed, write

down all conﬁguration settings. A log, such as the one shown

on pages CL-1 to CL-12, provides a convenient list for con-

ﬁguration values.

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 103 104

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