Operating Instructions; Operator Duties; Prepare The Chiller For Start-Up; To Start The Chiller - Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual

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 extended shutdowns, importance of a
log sheet, importance of water treatment and tube cleaning, and
importance of maintaining a leak-free chiller.
SAFETY DEVICES AND PROCEDURES
Electrical disconnects, relief device inspection, and handling
refrigerant.
CHECK OPERATOR KNOWLEDGE
Start, stop, and shutdown procedures, safety and operating con-
trols, refrigerant and oil charging, and job safety.
REVIEW THE START-UP, OPERATION, AND MAINTE-
NANCE MANUAL.
NOTE: Manuals and notebooks should not be stored under the
VFD power module as they will block airflow into the power
module cooling fan. Remove the manuals if they were placed
under the power module during shipping.

OPERATING INSTRUCTIONS

Operator Duties

1. Become familiar with the chiller and related equipment
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. Maintain a log of operating conditions and document any
abnormal readings.
4. Inspect the equipment, make routine adjustments, and per-
form a Control Test. Maintain the proper oil and refriger-
ant 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

Follow the steps described in the Initial Start-Up section,
page 37.

To Start the Chiller

1. Start the water pumps, if they are not automatic.
2. Press the Start/Stop icon on the HMI home screen 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 described in the Start-Up/Shutdown/
Recycle Sequence section, page 19.

Check the Running System

After the compressor starts, the operator should monitor the dis-
play and observe the parameters for normal operating conditions:
1. The oil reservoir temperature should be above 120°F
(49°C) during shutdown. Normal operating temperature is
120 to 165°F (49 to 74°C).
2. For 19XR2-E: The bearing oil temperature accessed on the
TEMP screen should be 120 to 165°F (49 to 74°C) for
compressors with rolling element bearings. If the bearing
temperature reads more than 180°F (83°C) with the oil
pump running, stop the chiller and determine the cause of
the high temperature. Do not restart chiller until corrected.
For 19XR6/7: The bearing temperature accessed from the
Temperatures menu should be 140 to 210°F (60 to 99°C) for
compressors with rolling element bearings. If the bearing
temperature is high or in Alarm/Alert state with the oil pump
running, stop the chiller and determine the cause of the high
temperature. Do not restart chiller until corrected.
3. The oil level should be visible anywhere in one of the two
sight glasses. Foaming oil is acceptable as long as the oil
pressure and temperature are within limits.
4. The oil pressure should be between 18 and 40 psid (124
and 207 kPad) differential, as seen on the HMI Transmis-
sion Status screen. Typically the reading will be 18 to
35 psid (124 to 241 kPad) at initial start-up.
5. The moisture indicator sight glass on the refrigerant
motor cooling line should indicate refrigerant flow and a
dry condition.
6. The condenser pressure and temperature varies with the
chiller design conditions. Typically the pressure will range
between 60 and 135 psig (390 and 950 kPa) with a corre-
sponding temperature range of 60 to 105°F (15 to 41°C).
The condenser entering water temperature should be con-
trolled below the specified design entering water tempera-
ture to save on compressor kilowatt requirements.
7. Cooler pressure and temperature also will vary with the
design conditions. Typical pressure range will be between
29.5 and 40.1 psig (203.4 and 276.4 kPa), with tempera-
ture ranging between 34 and 45°F (1.1 and 7.2°C).
8. The compressor may operate at full capacity for a short
time after the pulldown ramping has ended, even though
the building load is small. The active electrical demand
setting can be overridden to limit the compressor kW, or
the pulldown rate can be decreased to avoid a high demand
charge for the short period of high demand operation. Pull-
down rate can be based on load rate or temperature rate
and is accessed on the MAINTENANCE MENU 
CAPACITY CONTROLS  RAMP_DEM (Ramping
Demand Limit Value).
9. The economizer (if installed) has two sight glasses that look
into the float chamber. When the chiller is operating, the top
sight glass is empty and the bottom sight glass is full.

To Stop the Chiller

The occupancy schedule starts and stops the chiller automati-
cally once the time schedule is configured.
The unit can be stopped manually using the HMI by pressing
the green Start/Stop icon
displayed. Press Confirm Stop. The compressor will then fol-
low the normal shutdown sequence as described in the Start-
Up/Shutdown/Recycle Sequence section on page 19. The
chiller is now in the OFF control mode.
IMPORTANT: Do not attempt to stop the chiller by opening
an isolating knife switch. High intensity arcing may occur.
If the chiller is stopped by an alarm condition, do not restart
chiller until the problem is diagnosed and corrected.

After Limited Shutdown

No special preparations should be necessary. Follow the regu-
lar preliminary checks and starting procedures.

Preparation for Extended Shutdown

The refrigerant should be transferred into the pumpout storage
tank (if supplied; see Pumpout and Refrigerant Transfer Proce-
dures on page 39) to reduce chiller pressure and the possibility
of leaks. Maintain a holding charge of 5 to 10 lb (2.27 to 4.5 kg)
of refrigerant or nitrogen to prevent air from leaking into the
chiller.
For season chiller shutdown and lay-up, if the treated water is
not drained then provisions should be made to start the pumps
weekly to circulate the water and avoid corrosion. Consult the
water treatment company for details. Carrier is not responsible
for waterside corrosion.
38
. The Unit Start/Stop screen is