Carrier 19XL Check Oil Pressure and Compressor Stop, Calibrate Motor Current, ToPrevent Accidental Start-Up , Check Chiller Operating Condition , Instructthe Customer Operator , OPERATING INSTRUCTIONS Operator Duties, Preparethe Chiller for Start-Up , To Start the Chiller, Check the Running System

2. Observe that all 6-gate LEDs are lit on the starter SCR

control board.

3. Thefactory setting should bring the motor to full voltage

in15 to 30 seconds. If the setting is not correct, adjust the

ramp potentiometer counterclockwise for a shorter time,

clockwise for a longer time. (See Fig. 5 for starter com-

ponent placement.)

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

1. Make sure that the compressor motor rated load amps in

theService1 table has been conﬁgured. Place an ammeter

onthe line that passes through the motor load current trans-

fer on the motor side of the power factor correction ca-

pacitors (if provided).

2. Startthe compressor and establish a steady motor current

value between 70% and 100% RLA by manually over-

riding the guide vane targetvalue 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

ismet, 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 difference.

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 AUTOMATICmode.

ToPrevent Accidental Start-Up — ThePIC can be

set up so that start-up of the unit is more difficultthan just

pressingthe LOCAL or CCN softkeys during chiller serv-

ice or when necessary.By accessing the Status01 table, and

highlightingthe chiller Start/Stop line, the value can be over-

ridden to stop by pressing SELECT and then the

STOP and ENTER softkeys. ‘‘SUPVSR’’ will appear

after the value. When attempting to restart, remember to

release the override. The default chiller message line will

alsostate that the Start/Stop has been set to ‘‘Start’’or ‘‘Stop’’

when the value is overridden.

Check Chiller Operating Condition — Check to

besure that chiller temperatures, pressures, water ﬂows, and

oil and refrigerant levels indicate that the system is func-

tioning properly.

Instructthe Customer Operator — Check to be sure

that the operator(s) understand all operating and main-

tenance procedures. Point out the various chiller parts and

explain their function as part of the complete system.

COOLER-CONDENSER — Float chamber, relief devices,

refrigerantcharging valve, temperature sensor locations, pres-

sure transducer locations, Schrader ﬁttings, waterboxes and

tubes, and vents and drains.

OPTIONAL STORAGE TANKAND PUMPOUT SYS-

TEM — Transfer valves and pumpout system, refrigerant

charging and pumpdown procedure, and relief devices.

MOTOR COMPRESSOR ASSEMBLY — Guide vane

actuator, transmission, motor cooling system, oil cool-

ing 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.

MOTORCOMPRESSOR LUBRICATION SYSTEM — Oil

pump, cooler ﬁlter, oil heater, oil chargeand speciﬁcation,

operating and shutdown oil level, temperature and pressure,

and oil charging connections.

CONTROLSYSTEM — CCN and Local start, reset, menu,

softkey functions, LID operation, occupancy schedule, set

points, safety controls, and auxiliary and optional controls.

AUXILIARYEQUIPMENT — Starters and disconnects, sepa-

rate electrical sources, pumps, and cooling tower.

DESCRIBECHILLER CYCLES — Refrigerant, motor cool-

ing, lubrication, and oil reclaim.

REVIEWMAINTENANCE — 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 chiller.

SAFETYDEVICES AND PROCEDURES — Electrical dis-

connects, relief device inspection, and handling refrigerant.

CHECKOPERATOR KNOWLEDGE — Start, stop, and shut-

down procedures; safety and operating controls; refrigerant

and oil charging; and job safety.

REVIEWTHE START-UP,OPERATION, AND MAINTE-

NANCE MANUAL

OPERATING INSTRUCTIONSOperator Duties

1. Becomefamiliar with refrigeration chiller and related equip-

ment 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. Maintaina log of operating conditions and document any

abnormal readings.

4. Inspectthe equipment, make routine adjustments, and per-

form a Control Test.Maintain the proper oil and refrig-

erant levels.

5. Protect the system from damage during shutdown

periods.

6. Maintain the set point, time schedules, and other PIC

functions.

Preparethe Chiller for Start-Up — Follow the steps

described in the Initial Start-Up section, page 55.

To Start the Chiller

1. Start the water pumps, if they are not automatic.

2. On the LID default screen, press the LOCAL or

CCN softkey to start the system. If the chiller is in

the OCCUPIED mode, and the start timers have expired,

the start sequence will start. Follow the procedure de-

scribed in the Start-Up/Shutdown/Recycle section,

page 39.

Check the Running System — After the compres-

sor starts, the operator should monitor the LID display and

observe the parameters for normal operating conditions:

1. The oil reservoir temperature should be above 140 F

(60 C) during shutdown, and above 100 F (38 C) during

compressor operation.