Carrier AquaEdge 19DV series User guide

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53190048-01 Printed in U.S.A. Form 19DV-CLT-1SS Pg 1 8-18 Replaces: New
Start-Up, Operation, and Maintenance Instructions
SAFETY CONSIDERATIONS
Centrifugal liquid chillers are designed to provide safe
and reliable service when operated within design specifi-
cations. When operating this equipment, use good judg-
ment and safety precautions to avoid damage to
equipment and property or injury to personnel.
Be sure you understand and follow the procedures and
safety precautions contained in the chiller instructions
as well as those listed in this guide.
DANGER
Failure to follow these procedures will result in severe per-
sonal injury or death.
DO NOT VENT refrigerant relief valves within a building.
Outlet from rupture disc or relief valve must be vented out-
doors in accordance with the latest edition of ANSI/
ASHRAE 15 (American National Standards Institute/
American Society of Heating, Refrigerating, and Air-
Conditioning Engineers). The accumulation of refrigerant
in an enclosed space can displace oxygen and cause
asphyxiation.
PROVIDE adequate ventilation in accordance with ANSI/
ASHRAE 15, especially for enclosed and low overhead
spaces. Inhalation of high concentrations of vapor is harm-
ful and may cause heart irregularities, unconsciousness, or
death. Misuse can be fatal. Vapor is heavier than air and
reduces the amount of oxygen available for breathing.
Product causes eye and skin irritation. Decomposition
products are hazardous.
DO NOT USE OXYGEN to purge lines or to pressurize a
chiller for any purpose. Oxygen gas reacts violently with
oil, grease, and other common substances.
NEVER EXCEED specified test pressures; VERIFY the
allowable test pressure by checking the instruction litera-
ture and the design pressures on the equipment nameplate.
DO NOT USE air for leak testing. Use only refrigerant or
dry nitrogen.
DO NOT VALVE OFF any safety device.
BE SURE that all pressure relief devices are properly
installed and functioning before operating any chiller.
RISK OF INJURY OR DEATH by electrocution. High
voltage can be present on motor leads even though the
motor is not running. Open the power supply disconnect
before touching motor leads or terminals.
WARNING
Failure to follow these procedures may result in personal
injury or death.
DO NOT USE TORCH to remove any component. System
contains refrigerant under pressure.
To remove a component, wear protective gloves and gog-
gles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover or isolate refrigerant from system using
high-pressure and low pressure ports as appropriate.
Note that R-1233zd(E) will be less than atmospheric
pressure until a temperature of about 65°F (18.5°C).
c. Traces of vapor should be displaced with nitrogen
and the work area should be well ventilated. Refrig-
erant in contact with an open flame produces toxic
gases.
d. Cut component connection tubing with tubing cutter
and remove component from unit.
e. Carefully unsweat remaining tubing stubs when
necessary.
DO NOT USE eyebolts or eyebolt holes to rig chiller sec-
tions or the entire assembly.
DO NOT work on high-voltage equipment unless you are a
qualified electrician.
DO NOT WORK ON electrical components, including
control panels, switches, or starters until you are sure ALL
POWER IS OFF and no residual voltage can leak from
capacitors or solid-state components.
LOCK OPEN AND TAG electrical circuits during servic-
ing. IF WORK IS INTERRUPTED, confirm that all cir-
cuits are de-energized before resuming work.
AVOID SPILLING liquid refrigerant on skin or getting it
into the eyes. USE SAFETY GOGGLES. Wash any spills
from the skin with soap and water. If liquid refrigerant
enters the eyes, IMMEDIATELY FLUSH EYES with
water and consult a physician.
NEVER APPLY an open flame or live steam to a refriger-
ant cylinder. Dangerous overpressure can result. When it is
necessary to heat refrigerant, use only warm (110°F
[43°C]) water.
VERIFY that refrigerant storage cylinders are clean with
no residual moisture, oil, or refrigerant that can contami-
nate the refrigerant charge.
DO NOT REUSE disposable (nonreturnable) cylinders or
attempt to refill them. It is DANGEROUS AND ILLE-
GAL. When cylinder is emptied, evacuate remaining gas
pressure, loosen the collar, and unscrew and discard the
valve stem. DO NOT INCINERATE.
(Warnings continued on next page.)
AquaEdge®
19DV
Two-Stage Back-to-Back Centrifugal Liquid Chillers
with PIC5 Controls and HFO R-1233zd(E)
50/60 Hz

2
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . .
1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
ABBREVIATIONS AND EXPLANATIONS . . . . . . . .4
CHILLER FAMILIARIZATION . . . . . . . . . . . . . . . . . . . . . . 4
Chiller Information Nameplate . . . . . . . . . . . . . . . . . . .4
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Motor-Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Purge Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Variable Frequency Drive (VFD) . . . . . . . . . . . . . . . . .4
Refrigerant Lubrication System. . . . . . . . . . . . . . . . . . . . . 4
Chiller Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Purge Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PIC5 Touch Screen HMI . . . . . . . . . . . . . . . . . . . . . . . .4
REFRIGERATION CYCLE . . . . . . . . . . . . . . . . . . . . .7
REFRIGERANT LUBRICATION CYCLE . . . . . . . . . .8
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Bearings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Inhibitor Reclaim System . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Motor Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
VFD Cooling System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
VFD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Purge System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
PIC5 System Components . . . . . . . . . . . . . . . . . . . . . . . . 12
START-UP/SHUTDOWN/
RECYCLE SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Local Start/Stop Control . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Lubrication Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
BEFORE INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . 15
Job Data Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Remove Shipping Packaging . . . . . . . . . . . . . . . . . . . . . . 15
Tighten All Gasketed Joints . . . . . . . . . . . . . . . . . . . . . . . 15
Check Chiller Tightness . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Refrigerant Tracer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Leak Test Chiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Standing Vacuum Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chiller Dehydration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Inspect Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Check Safety Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Inspect Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Check Purge Compressor Operation . . . . . . . . . . . . . . 21
Checking the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Inspect Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Ground Fault Troubleshooting. . . . . . . . . . . . . . . . . . . . . 22
Carrier Comfort Network®Interface. . . . . . . . . . . . . . . . 23
Inhibitor Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Software Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Charge Unit with Refrigerant. . . . . . . . . . . . . . . . . . . . . . . 24
Field Set Up and Verification. . . . . . . . . . . . . . . . . . . . . . . 31
Perform a Controls Test (Quick Calibration/
Quick Test) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Check Motor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Check Refrigerant Lube . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
To Prevent Accidental Start-Up . . . . . . . . . . . . . . . . . . . . 33
Check Chiller Operating Condition . . . . . . . . . . . . . . . . 33
Instruct the Customer Operator. . . . . . . . . . . . . . . . . . . . 33
OPERATING INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . 35
WARNING
CHECK THE REFRIGERANT TYPE before adding
refrigerant to the chiller. The introduction of the wrong
refrigerant can cause damage or malfunction to this chiller.
Operation of this equipment with refrigerants other than
those cited herein should comply with ANSI/ASHRAE 15
(latest edition). Contact Carrier for further information on
use of this chiller with other refrigerants.
DO NOT ATTEMPT TO REMOVE fittings, covers, etc.,
while chiller is refrigerant charged or at any time while
chiller is running. Be sure pressure is at 0 psig (0 kPa)
before breaking any refrigerant connection. Note that
chiller will be in a vacuum condition when temperature is
below normal room temperature.
CAREFULLY INSPECT all rupture discs and other relief
devices AT LEAST ONCE A YEAR. If chiller operates in
a corrosive atmosphere, inspect the devices at more fre-
quent intervals.
DO NOT ATTEMPT TO REPAIR OR RECONDITION
any relief device when corrosion or build-up of foreign
material (rust, dirt, scale, etc.) is found within the valve
body or mechanism. Replace the device.
DO NOT install relief devices in series or backwards.
USE CARE when working near or in line with a com-
pressed spring. Sudden release of the spring can cause it
and objects in its path to act as projectiles.
CAUTION
Failure to follow these procedures may result in personal
injury or damage to equipment.
DO NOT STEP on refrigerant lines. Broken lines can whip
about and release refrigerant, causing personal injury.
DO NOT climb over a chiller. Use platform, catwalk, or
staging. Follow safe practices when using ladders.
USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to
lift or move inspection covers or other heavy components.
Even if components are light, use mechanical equipment
when there is a risk of slipping or losing your balance.
BE AWARE that certain automatic start arrangements
CAN ENGAGE THE STARTER, TOWER FAN, OR
PUMPS. Open the disconnect ahead of the starter, tower
fans, or pumps.
USE only repair or replacement parts that meet the code
requirements of the original equipment.
DO NOT VENT OR DRAIN waterboxes containing
industrial brines, liquid, gases, or semisolids without the
permission of your process control group.
DO NOT LOOSEN waterbox cover bolts until the water-
box has been completely drained.
DO NOT LOOSEN a packing gland nut before checking
that the nut has a positive thread engagement.
PERIODICALLY INSPECT all valves, fittings, and piping
for corrosion, rust, leaks, or damage.
PROVIDE A DRAIN connection in the vent line near each
pressure relief device to prevent a build-up of condensate
or rain water.
DO NOT leave refrigerant system open to air any longer
than the actual time required to service the equipment. Seal
circuits being serviced and charge with dry nitrogen to pre-
vent contamination when timely repairs cannot be
completed.

3
CONTENTS (cont)
Page
Operator Duties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Prepare the Chiller for Start-Up . . . . . . . . . . . . . . . . . . . . .35
To Start the Chiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Check the Running System. . . . . . . . . . . . . . . . . . . . . . . . .36
To Stop the Chiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
After Limited Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Preparation for Extended Shutdown. . . . . . . . . . . . . . . .36
After Extended Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . .36
Cold Weather Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Manual Guide Vane Operation . . . . . . . . . . . . . . . . . . . . . .36
Refrigeration Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
PUMPOUT AND REFRIGERANT
TRANSFER PROCEDURES . . . . . . . . . . . . . . . . . . . . . . .38
Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
GENERAL MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . .41
Refrigerant Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Adding Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Adjusting the Refrigerant Charge. . . . . . . . . . . . . . . . . . 41
Refrigerant Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Leak Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Test After Service, Repair, or Major Leak . . . . . . . . . . .41
Repair the Leak, Retest, and Apply
Standing Vacuum Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Checking Guide Vanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Trim Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
WEEKLY MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . .43
Check the Refrigerant Lubrication System . . . . . . . . .43
Check for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
SCHEDULED MAINTENANCE . . . . . . . . . . . . . . . . . . . . .43
Service Ontime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Inspect the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . .43
Inspect the Purge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Changing Refrigerant Lubrication Filters . . . . . . . . . . .44
Inspect Refrigerant Float System . . . . . . . . . . . . . . . . . . .44
Inspect Safety Relief Devices and Piping . . . . . . . . . . .44
Compressor Bearing Maintenance . . . . . . . . . . . . . . . . .45
Inspect the Heat Exchanger Tubes
and Flow Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Water Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Water Treatment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Inspect the VFD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Recalibrate Pressure Transducers . . . . . . . . . . . . . . . . .46
Recalibrate Temperature Thermistors . . . . . . . . . . . . . .46
Ordering Replacement Chiller Parts . . . . . . . . . . . . . . . .46
Carrier Inhibitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
TROUBLESHOOTING GUIDE. . . . . . . . . . . . . . . . . . . . . .46
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Checking Display Messages. . . . . . . . . . . . . . . . . . . . . . . .46
Checking Temperature Sensors . . . . . . . . . . . . . . . . . . . .46
Checking Pressure Transducers . . . . . . . . . . . . . . . . . . .49
High Altitude Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Quick Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Quick Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Pumpdown/Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
APPENDIX A — PIC5 SCREEN AND MENU
STRUCTURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
APPENDIX B — CCN COMMUNICATION
WIRING FOR MULTIPLE CHILLERS (TYPICAL). . .75
APPENDIX C — MAINTENANCE SUMMARY
AND LOG SHEETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
APPENDIX D — REMOTE CONNECTIVITY
COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
INITIAL START-UP CHECKLIST FOR
19DV SEMI-HERMETIC TWO-STAGE
CENTRIFUGAL LIQUID CHILLER . . . . . . . . . . . . . . CL-1
INTRODUCTION
Prior to initial start-up of the 19DV unit, those involved
in the start-up, operation, and maintenance should be thor-
oughly familiar with these instructions and other necessary
job data. Procedures in this manual are arranged in the se-
quence required for proper chiller start-up and operation.
This book also outlines the control system for those in-
volved in the start-up, operation and maintenance of the unit
before performing start-up procedures. It is intended to be
used in combination with the 19DV Semi-Hermetic Centrif-
ugal Liquid Chillers Controls Operation and Troubleshoot-
ing manual that describes PIC5 controls in detail.
CAUTION
This unit uses a microprocessor control system. Do not
short or jumper between terminations on circuit boards or
modules; control or board failure may result.
Be aware of electrostatic discharge (static electricity) when
handling or making contact with circuit boards or module
connections. Always touch a chassis (grounded) part to
dissipate body electrostatic charge before working inside
control center or use a grounding strap before handling
printed circuit boards.
Use extreme care when handling tools near boards and
when connecting or disconnecting terminal plugs. Circuit
boards can easily be damaged. Always hold boards by the
edges and avoid touching components and connections.
This equipment uses, and can radiate, radio frequency
energy. If not installed and used in accordance with the
instruction manual, it may cause interference to radio
communications. The PIC5 control boards have been
tested and found to comply with the limits for a Class A
computing device pursuant to International Standard in
North America EN 61000-2/3 which are designed to
provide reasonable protection against such interference
when operated in a commercial environment. Operation
of this equipment in a residential area is likely to cause
interference, in which case the user, at his own expense,
will be required to take whatever measures may be
required to correct the interference.
Always store and transport replacement or defective boards
in anti-static shipping bag.
CAUTION
Do NOT punch holes or drill into the top surface of the
control or VFD enclosure for field wiring. Knockouts are
provided for field wiring connections. Drilling holes
through the top of the cabinet can result in a loss of war-
ranty on the starter assembly because of metal particulate
falling on and into electronic components.
CAUTION
PROVIDE MACHINE PROTECTION. Store machine
and starter indoors, protected from construction dirt and
moisture. Inspect under shipping tarps, bags, or crates to be
sure water has not collected during transit. Keep protective
shipping covers in place until machine is ready for
installation. Follow latest Water-Cooled Chillers Long
Term Storage document located in Chiller Builder Library.
CAUTION
WHEN FLUSHING THE WATER SYSTEMS isolate the
chiller from the water circuits to prevent damage to the heat
exchanger tubes.

4
ABBREVIATIONS AND EXPLANATIONS
Frequently used abbreviations in this manual include:
Factory-installed additional components are referred to as
options in this manual; factory-supplied but field-installed ad-
ditional components are referred to as accessories.
CHILLER FAMILIARIZATION (Fig. 1 and 2)
Chiller Information Nameplate — The information
nameplate is located on the left side of the chiller control panel.
System Components — The main components in-
clude the cooler and condenser heat exchangers in separate
vessels, motor-compressor, refrigerant, lubrication package,
control panels, PIC5 Touch Screen HMI, economizer, VFD,
and purge system.
Evaporator — This vessel is located underneath the com-
pressor. The cooler is maintained at lower temperature/pressure
so evaporating refrigerant can remove heat from water flowing
through its internal tubes. Water is flowing through the tube in-
ternals to provide comfort or process cooling.
Condenser — The condenser operates at a higher tem-
perature/pressure than the evaporator and has water flowing
through its internal tubes in order to remove heat from the
refrigerant. It contains a metering device that regulates the
flow of refrigerant into the economizer.
Economizer — This chamber reduces the refrigerant
pressure to an intermediate level between the evaporator
and condenser vessels. In the economizer, vapor is separat-
ed from the liquid, the separated vapor flows to the second
stage of the compressor, and the liquid flows into the cooler.
The energy removed from the vaporized refrigerant in the
economizer allows the liquid refrigerant in the cooler to ab-
sorb more heat when it evaporates and benefits the overall
cooling efficiency cycle. It contains a float assembly that
regulates the flow of refrigerant into the evaporator.
Motor-Compressor — This component maintains sys-
tem temperature and pressure differences and moves the
heat-carrying refrigerant from the cooler to the condenser.
The 19DV utilizes a two-stage back to back direct drive
configuration.
Purge Unit — A small independent condensing unit
with compressor, separator, regenerative carbon filters,
heater and vacuum pump. The purge extracts gas from con-
denser (or from compressor if unit is not in operation) and
purifies it by removing non-condensable gases and any wa-
ter vapor that may be present.
Variable Frequency Drive (VFD) — The VFD vari-
able frequency is a voltage source design that converts line
voltage into PWM (pulse width modulating) motor input for
motor speed and torque control.
Refrigerant Lubrication System — This system pro-
vides lubrication to the compressor bearing by means of a re-
frigerant pump.
Chiller Control Panel — This control panel includes
the input and output boards (IOB), control transformer, relays,
contactors, and circuit breakers. It provides the power distribu-
tion and protection to the electrical components installed on
chiller and has the following functions:
• Communication with PIC5 touch screen
• Communication with purge panel
• Communication with VFD
• Sensor input and outputs
• Actuators control
• Refrigerant pump control
Purge Control Panel — The purge panel includes the
input and output boards, control transformer, relays, and fuse. It
provides the power distribution and protection to the electrical
components which installed in the purge system and has the
following functions:
• Communication with PIC5 touch screen
• Sensor input and outputs
• Solenoid valve control
• Control of purge compressor, vacuum pump, heater, and fan.
PIC5 Touch Screen HMI — This panel is the user in-
terface for controlling the chiller and has the following
functions:
• Chiller operation
• Chiller diagnostic
• Chiller status display
• Chiller parameter configuration
• Provide open protocol interface to outside BMS system
CCN — Carrier Comfort Network®
ECDW — Entering Condenser Water
ECW — Entering Chilled Water
EMS — Energy Management System
HMI — Human Machine Interface
I/O — Input/Output
LCDW — Leaving Condenser Water
LCW — Leaving Chilled Water
LED — Light-Emitting Diode
OLTA — Overload Trip Amps
PIC5 — Product Integrated Controls Plus
RLA — Rated Load Amps
SCR — Silicon Controlled Rectifier
SIOB — Starfire 2 Input Output Board
TXV — Thermostatic Expansion Valve
VFD — Variable Frequency Drive

5
Fig. 1 — 19DV Chiller Model Number Identification
SERIAL NUMBER STRUCTURE
12 17 Q 26788
Week of Year
Ye ar of Manufacture
Unique Number
Place of Manufacture
a19-2271
Description
19 — High Efficiency Semi-Hermetic
Centrifugal Chiller
19 G 4
DV–
V — Variable Speed Drive
Evaporator Frame Size, Length,
Pass Arrangement, and Tube Count
44G44
Condenser Frame Size, Length,
Pass Arrangement, and Tube Count
44
Compressor Frame Size Compressor Impeller Diameter Code
Motor Voltage Code
Code Volts-Phase-Hertz
3 — 380-3-60
4 — 416-3-60
5 — 460-3-60
9 — 400-3-50
Special Order Indicator
– — Standard
S — Special Order
VFD Code*
5 — 850 Amp Std Tier VFD
5H4
Compressor Shroud Code
3 —Smallest shroud
4— Small-Mid shroud
5— Mid-Large shroud
6— Largest shroud
Motor Code*
B —Smallest HP
D— Small-Mid HP
F — Mid-Large HP
H— Largest HP
2 —Small diameter
4— Large diameter
G20 - G4K — Frame G
G20 - G4K — Frame G
*Refer to 19DV NG E-Cat Builder
for motor and VFD size details.
4 — 500-800 nominal tons (1758-2813 kW)
D — Low Pressure

6
Fig. 2 — Typical 19DV 500-800 Ton Two-Stage Compressor Chiller Components
(DV4 Shown)
FRONT VIEW
8
9
7
6
5
4
10
11
12
13
14
15
16
17
18
19
12
3
1 - INTERCONNECTING COMPRESSOR PIPING
2 - VFD DRAIN (FIELD DRAIN PIPING REQUIRED)
3 - CONDENSER
4 - CONDENSER WATERBOX RETURN END
5 - ECONOMIZER ISOLATION VALVE (OPTION)
6 - ECONOMIZER
7 - EVAPORATOR WATERBOX RETURN END
8 - VACUUM/CHARGING VALVE (HIDDEN)
9 - PIC5 HMI TOUCHSCREEN PANEL
10 - EVAPORATOR BUNDLE SIGHT GLASSES
11 - RUPTURE DISC
12 - SUCTION ELBOW
13 - EVAPORATOR CHARGING VALVE AND
EVAPORATOR PRESSURE TRANSDUCER
14 - FIRST STAGE GUIDED VANE ACTUATOR
15 - COMPRESSOR MOTOR
16 - MOISTURE INDICATOR (HIDDEN)
17 - EVAPORATOR
18 - SECOND STAGE GUIDED VANE ACTUATOR
19 - EVAPORATOR WATERBOX NOZZLES
REAR VIEW 20 - CONDENSER WATERBOX NOZZLES
21 - CONDENSER PRESSURE TRANSDUCER
22 - CONDENSER CHARGING VALVE
23 - ENVELOPE STABILITY CONTROL PIPE
24 - PURGE ASSEMBLY
25 - PURGE VENT (HIDDEN)
26 - MOTOR VFD COOLING MOISTURE
INDICATOR (HIDDEN)
27 - CONTROL PANEL
28 - CHILLER NAME PLATE LABEL
29 - LUBRICATION ASSEMBLY
30 - ECONOMIZER PIPE
31 - VFD
32 - DISCHARGE PIPE
31
30
28 27
26
24
23
22
21
20
25
29
32

7
REFRIGERATION CYCLE
The compressor continuously draws refrigerant vapor from
the evaporator at a rate set by the amount of first stage guide
vane opening and motor speed. As the compressor suction re-
duces the pressure in the evaporator, the remaining refrigerant
boils at a fairly low temperature (typically 38 to 42°F [3 to
6°C]). The energy required for boiling is obtained from the wa-
ter flowing through the evaporator tubes. With heat energy re-
moved, the water becomes cold enough to use in an air-condi-
tioning circuit or process liquid cooling.
After taking heat from the water, the refrigerant vapor is com-
pressed by a back-to-back compression connected by means of
interstage piping. Compression adds heat energy and the refrig-
erant is quite warm (typically 98 to 102°F [37 to 40°C]) when it
is discharged from the compressor into the condenser.
Relatively cool (typically 65 to 90°F [18 to 32°C]) water
flowing into the condenser tubes removes heat from the refrig-
erant, and the vapor condenses to liquid. The liquid drains into
a high side float valve chamber between the condenser and the
economizer. The refrigerant is then metered into the economiz-
er. In the economizer, due to lower pressure, as liquid enters the
chamber, some liquid will flash into a vapor and cool the re-
maining liquid. The separated vapor flows to the second stage
of the compressor for greater cycle efficiency. The second
stage guide vane on the compressor acts as a pressure regulat-
ing device to stabilize operating conditions. At part load the
second stage guide vane will back up gas flow and thereby rais-
es the economizer pressure to allow appropriate refrigerant
flow from economizer to the compressor.
The cooled liquid left in the economizer flows through a
low side float valve and then into the evaporator. The float
valve forms a liquid seal to keep vapor from entering the
evaporator. The refrigerant is now at a temperature and
pressure at which the cycle began. Fig. 3 summarizes the re-
frigeration cycle.
The 19DV unit utilizes R-1233zd(E) refrigerant. At at-
mospheric pressure its boiling point is 65.5°F (18.6°C).
The result is that at normal operating conditions the evapo-
rator typically will be in a vacuum condition and the con-
denser will operate at a pressure above atmospheric pres-
sure. Unit near room temperature will be close to atmo-
spheric pressure.
Fig. 3 — Refrigeration Cycle — 19DV Two-Stage Compressor
HIGH SIDE FLOAT
CHAMBER
COOLER
ECONOMIZER
LOW SIDE
FLOAT CHAMBER
CONDENSER
COMPRESSOR

8
REFRIGERANT LUBRICATION CYCLE
Summary — The 19DV Series chiller uses refrigerant to
lubricate the bearings. The lubrication control is automatical-
ly controlled by the chiller controls. In normal RUN mode re-
frigerant is pumped by means of a refrigerant pump from the
high side condenser float chamber to the bearings. Prior to
start-up liquid level in the high side condenser float chamber
is maintained by pumping refrigerant liquid from the evapo-
rator to the high side float chamber until level sensor is satis-
fied. If liquid high side float level is not satisfied the pump
will move refrigerant from the evaporator to the condenser.
Figures 4 and 5 identify the refrigerant lubrication as-
sembly. Supply refrigerant is pulled through a filter drier by
the refrigerant pump and is pumped to the bearings through
two protective filters and then returned to the evaporator.
There are two pressure sensors located across the refrigerant
pump. During RUN mode a minimum of 12 psid is required
for the refrigerant pump delta difference. An alert will trigger if
this value is less than 13 psid while the machine is in normal
operating mode. Consult the Controls Operation and Trouble-
shooting Manual for details.
Bearings — The 19DV motor-compressor assembly in-
clude two sets of purely refrigerant lubricated bearings. The
motor shaft is supported by a combination set of journal
bearing and roller element bearings on each end of com-
pressor. The refrigerant lubrication pressure difference is
defined as the bearing input pressure minus the bearing out-
put pressure plus the Refrigerant Delta P Offset.
Fig. 4 — Refrigerant Lubrication Cycle
CAUTION
To avoid adverse effects on chiller operation, consider-
ations must be made to condenser water temperature con-
trol. For steady state operation, the minimum operating
refrigerant pressure differential between cooler and con-
denser is approximately 7 psid (48 kPa) with a maximum
evaporator refrigerant temperature of 65°F (18°C). Consult
Chiller Builder for required steady state operational limits
and low lift options. Inverted start conditions are accept-
able for short durations of time, but for periods exceeding 5
minutes, a special control solution strategy should be used
to allow the chiller to establish a minimum refrigerant pres-
sure differential (and thereby adequate equipment cooling).
PURGE SYSTEM
CONDENSER
HIGH SIDE FLOAT
CHAMBER
REFRIGERANT
LUBRICATION
SYSTEM
VENT LINE
COOLER
ECONOMIZER
LOW SIDE
FLOAT CHAMBER
COMPRESSOR
EDUCTOR
= PURGE
= LUBE SYSTEM
= MAIN REFRIGERANT SYSTEM
LEGEND

9
Fig. 5 — Refrigerant Lubrication Assembly
Inhibitor Reclaim System — The inhibitor reclaim
system moves inhibitor from evaporator and returns it to the
first stage suction inlet which allows it to be mixed in the sys-
tem since it has a tendency to have higher concentration in the
evaporator compared with the rest of the system. The reclaim is
powered by an eductor driven by the gas pressure difference
between first stage suction and discharge of second stage.
Motor Cooling System — The motor is cooled by liq-
uid refrigerant taken from the bottom of the high side condenser
float chamber. Refrigerant flow is maintained by the pressure
differential that exists due to compressor operation. After the re-
frigerant flows past an isolation valve, an in-line filter drier, and
a sight glass/moisture indicator, it is directed over the motor by
spray nozzles. The refrigerant collects in the bottom of the mo-
tor casing and is then drained back into the cooler through the
motor refrigerant drain line. The motor is protected by tempera-
ture thermistors embedded in the stator windings. An increase
in motor winding temperature past the motor override set point
overrides the temperature capacity control to hold, and if the
motor temperature exceeds 10°F (5.5°C) above this set point,
the controls close the inlet guide vanes. If the temperature rises
above 122°F (50°C), the compressor shuts down. See Fig. 6.
VFD Cooling System — The VFD enclosure is
sealed from the atmosphere to protect electronics from out-
side contaminants. Refrigerant is routed through a coil in
the VFD enclosure to regulate enclosure temperature while
still maintaining a temperature high enough to prevent con-
densation. VFD cooling line is branched off the motor cool-
ing supply. The refrigerant is then drained back into the
cooler through the motor/VFD drain line. Rectifier and in-
verter sections are air-cooled and protected by temperature
sensors embedded in the inverter. An increase in inverter
temperature past the override set point overrides the tem-
perature capacity control to hold, and if the temperature ex-
ceeds 10°F (5.5°C) above this set point, the controls close
the inlet guide vanes. If the temperature rises above 144°F
(80°C), the compressor shuts down. See Fig. 6.
VFD — All 19DV units are equipped with a VFD to oper-
ate the centrifugal hermetic compressor motor. The VFD
and control panel are the main field wiring interfaces for the
installing contractor. The VFD and control panel are mount-
ed on the chiller. See Manufacturer VFD specific informa-
tion and VFD schematics.
VFD model 32VS is designed to operate in an ambient
range of up to 104°F (40°C). The drive has two circuit boards.
The Digital Control Interface Board (DCIB) controls the
fans for cooling operation, IGBTs, measures three phase
line current, controls temperature input and cooling sole-
noid, controls outputs for pilot relays, and controls SAIA
communication.
The High Voltage Interface Board (HVIB) steps down in-
coming voltage to 24 VAC and sends this to the DCIB for mon-
itoring. The HVIB measures DC Bus voltage, controls the pre-
charge circuit, and controls SCR gating. It contains watchdog
LED to confirm DC Bus potential is depleted.
Should the drive need to be removed the 4 lifting lugs
should be utilized. See Fig. 7. 32VS 850A weight is approxi-
mately 1500 lbs. The drive is compatible with the Network
Service Tool V (NSTV).
Purge System — The purge system is located under the
condenser. See Fig. 8. It has two gas inlets coming from con-
denser and compressor. When chiller is running, the condenser
line is active/open and non-condensable gas will pulled out
from condenser and when chiller is idle the compressor line is
active and non-condensables are pulled out from compressor
volute. This is implemented due to non-condensable gas densi-
ty being less than refrigerant and therefore it will accumulate at
the highest point when chiller is not running.
In the purge tank the purge gas is cooled by a separate in-
tegral R-134a cooling system. The cooling system consists
of an compressor, an air cooled condenser coil, an expan-
sion valve, and a cooling coil in purge tank. Cooling the
purge gas results in condensation of R-1233zd(E) vapor as it
touches the coil resulting in a vacuum which the result that
more refrigerant is pushed to the coil. As the purge tank fills
up with refrigerant it will be drained through the purge drain
to the refrigerant pump assembly. See Fig. 9.
STRAINER
FROM EVAPORATOR
TO COMPRESSOR/
MOTOR BEARINGS
ACTUATOR AND
3-WAY VALVE
ACTUATOR
FROM
HIGH SIDE
FLOAT
CHAMBER
REFRIGERANT
PUMP
PUMP
DISCHARGE
PUMP
SUCTION
FILTER
FILTER

10
Fig. 6 — Motor/VFD Cooling System
Fig. 7 — 32VS 850A
MOISTURE
INDICATOR
VFD
P
P
MOTOR COOLING
SYSTEM
CONDENSER
COOLER
MOISTURE
INDICATOR
SOLENOID VALVE
COMPRESSOR
LIFTING LUGS
LIFTING LUGS

11
Fig. 8 — Purge System
Fig. 9 — Purge Tank
COMPRESSOR
VOLUTE (SV02)
CONDENSER (SV01)
MOTOR DRAIN (SV05)
VENTING
(SV06)
PURGE TANK
PURGE PUMPOUT (SV03) EXTRA FILTERS
WITH STRAP HEATERS
(NOT SHOWN)
VACUUM PUMP
COMPRESSOR
SUCTION
CONTROL
PANEL
PURGE DRAIN (SV04)
(REFRIGERANT PUMP INLET)
COMPRESSOR
CONDENSER
ASSEMBLY
STRAINER
CONDENSER
COMPRESSOR
SV01
COMPRESSOR
VALVE
SV02
COMPRESSOR
SUCTION TEMP
STRAINER
134A CIRCUIT
LEVEL
SV04
PURGE DRAIN
(TO LUBE ASSY)
CARBON FILTERS
VACUUM
PUMP
SV05
STRAINER
SIGHT GLASS
CONDENSER ASSY
REGENERATION
VALVE
SV03PUMPOUT
VALVE
CHECK VALVE
(TO MOTOR DRAIN)
FIELD CONNECTION /
PURGE VENT 3/8NPT
SWITCHES
VENT LINE
REGENERATED
REFRIGERANT
THROTTLE
DEVICE
CONDENSER
VALVE
DRAIN VALVE
VENT
VALVE
SV06
CHECK VALVE
(HIDDEN)

12
Non-condensables that comes into contact with the cold coil
in the purge tank will not condense and will accumulate at the
top of the purge tank. When the controls sense that there is suf-
ficient non-condensable gas in the purge tank, the control will
open the pumpout valve, activate the purge evacuation pump,
and force the gas through the active carbon filters. To capture
any remaining refrigerant the gas is routed through two active
carbon filters that will absorb any remaining refrigerant. As the
carbon filters becomes saturated the system will regenerate the
filters by applying heat to the filters while under vacuum and
then disperse the regenerated refrigerant back to the cooler
while releasing the non-condensables to atmosphere.
The 19DV purge control is automatic. Purge control should
be active when purge inlet temperature (evaporator refrigerant
liquid temp when chiller compressor OFF or condenser saturat-
ed temperature when chiller compressor ON) is greater than
purge active temperature set point (65°F default [18.3°C)].
If chiller compressor is running, condenser solenoid
valve should be opened to purge refrigerant from condenser.
If chiller compressor is not running, open the compressor
solenoid valve to purge refrigerant from compressor. If Purge
Comp Suction Temp is less than purge compressor off temp
(default to 4°F [-15.5°C]) and the refrigerant level flag is ON,
close compressor solenoid valve, condenser solenoid valve,
and open pump out solenoid valve. Purge vent valve and purge
vacuum pump shall be kept ON for about 10s. After 10s dis-
charge, pump out solenoid valve, purge vent valve, and purge
vacuum pump shall be kept OFF. Condenser solenoid valve
shall be opened if chiller compressor is running or compressor
solenoid valve shall be opened if chiller compressor is not run-
ning. After 10s discharge, it will start 20s delay. Then, check
purge compressor suction temperature again; if it is less than
6°F (-14°C), it will continue cycle as before.
If refrigerant level in the purge tank is high (both PGLE_HI
and PGLE_LO are ON), or purge compressor suction tempera-
ture is less than 12°F (-11°C) and PGLE_LO is ON, then drain-
age solenoid valve should be opened to drain refrigerant from
purge tank to evaporator (open SV04, SV01, SV02 when
chiller is off, open SV04, SV01 when chiller is on). After
PGLE_LO is OFF, keep drain process for another 1s, then set
the refrigerant level flag to ON. If purge level in the purge tank
is low (both PGLE_HI and PGLE_LO are OFF), drainage so-
lenoid valve should be closed.
If pump out solenoid valve is accumulated ON for 100
minutes, purge system should do regeneration process for
reg_tim minutes (default = 120 minutes - 19DV Configura-
tion Menu), regardless whether purge is active. When re-
generation process active, the Purge Regeneration Valve
and Purge Heater should be on for reg_tim minutes, purge
vacuum pump should be on for 3 minutes and then 10 min-
utes off, alternating during reg_tim minutes.
Upon regeneration completion, purge system will wait for
another 4 hours to let carbon filter cool down before it will op-
erate normally.
CONTROLS
Definitions
ANALOG SIGNAL — An analog signal varies in propor-
tion to the monitored source. It quantifies values between
operating limits. (Example: A temperature sensor is an ana-
log device because its resistance changes in proportion to
the temperature, generating many values.)
DISCRETE SIGNAL — A discrete signal is a 2-position
representation of the value of a monitored source. (Exam-
ple: A switch produces a discrete signal indicating whether
a value is above or below a set point or boundary by gener-
ating an on/off, high/low, or open/closed signal.)
General — The 19DV centrifugal liquid chiller contains
a microprocessor-based control center that monitors and
controls all operations of the chiller. The microprocessor
control system matches the cooling capacity of the chiller to
the cooling load while providing state-of-the-art chiller pro-
tection. The system controls cooling load within the set
point plus the deadband by sensing the leaving chilled water
or brine temperature and regulating the inlet guide vanes
and compressor speed. The guide vane is a variable flow
pre-whirl assembly that controls the refrigeration effect in
the cooler by regulating the amount of refrigerant vapor
flow into the compressor. An increase in guide vane open-
ing increases capacity. A decrease in guide vane opening
decreases capacity. The microprocessor-based control cen-
ter protects the chiller by monitoring the digital and analog
inputs and executing capacity overrides or safety shut-
downs, if required. The variable frequency drive (VFD) al-
lows compressor start-up and capacity control by modulat-
ing the motor frequency based on the operation condition.
PIC5 System Components — The chiller control
system is called the PIC5 (Product Integrated Control 5).
See Table 1. As with previous PIC versions, the PIC5 sys-
tem controls the operation of the chiller by monitoring all
operating conditions. The PIC5 control system can diagnose
a problem and let the operator know what the problem is
and what to check. It positions the guide vanes and VFD
speed to maintain leaving chilled water temperature. It con-
trols the refrigerant pump providing compressor bearing lu-
brication and can interface with auxiliary equipment such as
pumps and cooling tower fans to turn them on when re-
quired. It continually checks all safeties to prevent any un-
safe operating condition. It regulates the envelope control
valve for stabilized aerodynamic operation, if installed. The
PIC5 controls offer an operator trending function to help the
operator monitor the chiller status more easily and for criti-
cal compressor motor protection. The PIC5 system provides
open protocols to support the competitive BMS system and
can be integrated into Carrier’s Lifecycle System Manage-
ment for remote monitoring and data management.
Table 1 — Major PIC5 Components and
Panel Locations
NOTE: For detailed information about the PIC 5 HMI (human
machine interface), see the 19DV with PIC 5 Controls Opera-
tion and Troubleshooting manual.
START-UP/SHUTDOWN/
RECYCLE SEQUENCE
Local Start/Stop Control — Local start-up (or manual
start-up) is initiated by pressing the gray Start/Stop icon on the
HMI interface. See Fig. 10.
WARNING
The main circuit breaker (if equipped) on the front of the
starter disconnects the main motor power only. Power may
be still energized for other circuits. Always check wiring
diagrams before initiating any work on the chiller and fol-
low applicable lock-out/tag-out procedures. Failure to dis-
connect power will result in personal injury.
PIC5 COMPONENT PANEL LOCATION
Variable Frequency Drive Top of condenser
Purge Panel Under condenser
Remote Monitoring Control Panel

13
Fig. 10 — Chiller Start/Stop Icon
This initiates the PIC5 starting sequence by displaying the
list of operating modes. Press Local On to initiate start-up.
See Fig. 11.
Fig. 11 — Local On
NOTE: Prior to start-up the start-to-start timer and the stop-to-
start timer must have elapsed and all alarms must be cleared
(see Troubleshooting Guide section).
When start-up is initiated the status screen displays the start-
up progress and the Start/Stop icon blinks green.
Once local start-up begins, the PIC5 control system per-
forms a series of prestart tests to verify that all prestart alerts
and safeties are within acceptable limits. Table 2 shows appro-
priate Prestart Alerts/Alarms conditions. If a test is not success-
ful, the start-up is delayed or aborted. If the tests are successful,
the start-up will be in progress and the COMPRESSOR RUN
STATUS shall be “Startup.” The control shall then energize the
chilled water/brine pump relay.
Five seconds later, the condenser pump relay energizes.
Thirty seconds later the PIC5 control system monitors the
chilled water and condenser water flow devices and waits until
the WATER FLOW VERIFY TIME (operator-configured, de-
fault 5 minutes) expires to confirm flow. After flow is verified,
the chilled water temperature is compared to CONTROL
POINT plus 1/2 CHILLED WATER DEADBAND. If the tem-
perature is less than or equal to this value, the PIC5 control sys-
tem turns off the condenser pump relay and goes into a Recycle
mode.
If the water/brine temperature is high enough, the start-up
sequence continues and checks the guide vane position. If the
guide vanes are more than 4% open, the start-up waits until
the PIC5 control system closes the vanes. If the vanes are
closed and the refrigerant pump pressure difference is less
than 2.5 psid (17.2 kPa), the refrigerant pump relay energizes.
The PIC5 control system then waits until the refrigerant pres-
sure (REF PRESS VERIFY TIME, operator-configured, de-
fault of 40 seconds) reaches 12 psid (82.7 kPa). After refrig-
erant pressure is verified, if high side float chamber has ade-
quate liquid level refrigerant pump will be kept ON for 20
seconds for pre-lube; if not, refrigerant pump will be kept ON
pumping refrigerant from evaporator to the high side float
chamber until liquid level is satisfied. Upon pre-lube satisfied
the compressor start relay is energized.
Compressor ontime and service ontime timers start, and the
compressor STARTS IN 12 HOURS counter and the number of
starts over a 12-hour period counter advance by one.
Failure to verify any of the requirements up to this point will
result in the PIC5 control system aborting the start and display-
ing the applicable prestart alert alarm state number near the
bottom of the home screen on the HMI panel. A prestart failure
does not advance the STARTS IN 12 HOURS counter. Any fail-
ure after the 1CR relay has energized results in a safety shut-
down, advances the starts in 12 hours counter by one, and dis-
plays the applicable shutdown status on the display.
The minimum time to complete the entire prestart sequence
is approximately 185 seconds. See Fig. 12 for normal start-up
timing sequence. See Table 2 for a list of prestart checks.
Lubrication Control — For the 19DV system, refriger-
ant is used to lubricate and cool the compressor bearings. The
refrigerant lubrication system includes refrigerant pump pres-
sure transducers, control valves, filters, liquid level switch and
inhibitor reclaim system. See Fig. 13 for the lube assembly
schematic.
When the chiller is powered on, the controller will maintain
liquid level in condenser float chamber. If liquid level is low,
refrigerant will be pumped from cooler to condenser high side
float chamber until the liquid level switch is ON. Once the
operator pushes the start button, the system will go into prestart
check process.
When Refrigerant Pump request is on for pre-lube and the
bearing pressure difference is OK for start, if cooler tempera-
ture plus leaving condenser water temperature is less than 10°F
(-12.2°C), pump refrigerant from Cooler to Condenser until
compressor is ON. Else, if cooler temperature plus leaving
condenser water is equal or larger than 10°F (-12.2°C), pump
refrigerant from condenser to bearing and drain to condenser
until compressor is ON.
During pre-lubrication, if the bearing pressure difference
is less than 8 psid (55.2 kPa) for 8 seconds continuously, the
chiller will shut down. To proceed to start-up, the bearing pres-
sure difference needs to exceed 12 psid (82.7 kPa) during the
pressure verification time. The compressor will run after the
pre-lubrication process. Refrigerant from the high side con-
denser float chamber will be pumped to bearings and will drain
to cooler. When chiller shuts down, the condenser control valve
will be opened and the refrigerant evaporator control valve will
open (3-way valve will connect evaporator to pump suction).
This position allows refrigerant to be pumped from cooler to
condenser high side float chamber. When the chiller is OFF, al-
ways open cooler control valve. During running, if compressor
is ON and the bearing pressure difference is less than 10 psid
(68.9 kPa) for 10 seconds continuously, the chiller will shut
down.
Unit Start/Stop

14
Fig. 12 — Control Timing Sequence for Normal Start-Up
Fig. 13 — Lube Assembly Schematic
Table 2 — Prestart Checks
* If Prestart Check Condition is True, then resulting State is as indi-
cated in the State Number column.
† See the Controls Operation and Troubleshooting guide for alarm
and alert codes.
** Evap trip point = 33°F (0.6°C) (water) or EVAP REFRIG TRIP-
POINT (brine).
††Condition ignored for Eaton/Rockwell VFDs.
ASTART INITIATED: prestart checks are made; cooler pump
started.*
B Condenser water pump started (5 seconds after A).
C
Water flows verified (30 seconds to 5 minutes maximum
after B). Chilled water temperatures checked against control
point. Guide vanes checked for closure. Refrigerant pump
started; tower fan control enabled.
DRef pressure verified (15 seconds minimum, 300 seconds
maximum after C).
E
Compressor motor starts; compressor on-time and service
on-time start, 15-minute inhibit timer starts (10 seconds after
D), total compressor starts advances by one, and the num-
ber of starts over a 12-hour period advances by one.
F
SHUTDOWN INITIATED; Compressor motor stops; com-
pressor on-time and service on-time stop, and 2-minute
inhibit timer starts.
G
Refrigerant pump and cooler pumps de-energized (120 sec-
onds after F).Condenser pump and tower fan control may
continue to operate if condenser pressure is high. Cooler
pump may continue if in RECYCLE mode.
O/A Restart permitted (both inhibit timers expired: minimum of 15
minutes after E; minimum of 2 minutes after F).
* Auto Restart After Power Failure Timing sequence will be faster.
MACHINE SAFETIES
EVAPORATOR PUMP
CONDENSER
WATER PUMP
WATER FLOW, CHILLED WATER
TEMP, GUIDE VANES, REF PUMP,
TOWER FAN CONTROL
REF PUMP
COMPRESSOR,
COMPRESSOR ONTIME,
SERVICE ONTIME
15-MINUTE
START-TO-STA R T
2-MINUTE
STOP-TO-STA R T
PRESTART CHECK CONDITION* STATE NUMBER†
STARTS IN 12 HOURS 8 (not counting recycle restarts or auto restarts after power failure) Alert – 100
COND PRESSURE COND PRESS OVERRIDE – 20 psi Alert – 102
#RECYCLE RESTARTS LAST 4 HOURS > 5 Alert – 103
COMP BEARING TEMP >= COMP BEARING ALERT– 10°F (5.6°C) Alarm – 230
COMP MOTOR WINDING TEMP COMP MOTOR WINDING– 10°F (5.6°C) Alarm – 231
COMP DISCHARGE TEMPERATURE COMP DISCHARGE ALERT– 10°F (5.6°C) Alarm – 232
EVAP_SAT <Evap trip point** + EVAP OVERRIDE DELTA T Alarm – 233
EVAP REFRIG LIQUID TEMP <Evap trip point** + EVAP OVERRIDE DELTA T Alarm – 233
AVERAGE LINE VOLTAGE UNDERVOLTAGE THRESHOLD†† Alarm – 234
AVERAGE LINE VOLTAGE OVERVOLTAGE THRESHOLD†† Alarm – 235
CHECK FOR GUIDE VANE 1 CALIBRATION Alarm – 236
CHECK FOR GUIDE VANE 2 CALIBRATION Alarm – 238
PUMP REFRIGERANT FILTER
PURGE DRAIN
COOLER
SIGHT GLASSSTRAINER
STRAINER
PUMPOUT
DRAIN
BEARING FILTER
BEARING
SUPPLY
HSFLOAT CHAMBER
2-WAY
ACTUATED VALVE
3-WAY
ACTUATED
VALVE

15
Shutdown — The unit can be stopped locally using the
HMI by pressing the green Start/Stop icon . The Unit Start/
Stop screen is displayed. Press Confirm Stop (see Fig. 14).
Fig. 14 — Confirm Stop
Chiller shutdown begins if any of the following occurs:
• Local OFF button is pressed
• A recycle condition is present
• The time schedule has gone into unoccupied mode when
in Network or Local Schedule control mode
• The chiller protective limit has been reached and chiller
is in alarm
• The start/stop status (CHIL_S_S) is overridden to stop
from the network when in Network mode
If the chiller is normally shut down from running, soft stop
shutdown will be performed. The soft stop feature closes the
guide vanes of the compressor automatically if a non-alarm
stop signal occurs before the compressor motor is de-energized.
Any time the compressor is directed to stop (except in the
cases of a fault shutdown), the guide vanes are directed to close
and VFD is directed to minimum speed for variable speed
compressor, and the compressor shuts off when any of the fol-
lowing is true:
• PERCENT LOAD CURRENT (%) drops below the
SOFT STOP AMPS THRESHOLD
• ACTUAL GUIDE VANE OPENING drops below 4%
• 4 minutes have elapsed after initializing stop.
When any one of the above conditions is true, the shutdown
sequence stops the compressor by deactivating the compressor
start relay. Then the guide vane shall be closed and stay at the
fully closed position, the refrigerant pump relay will be turned
off after 120 seconds post lube, and the chilled water/brine
pump and condenser water pump will be shut down.
BEFORE INITIAL START-UP
Job Data Required
• list of applicable design temperatures and pressures
(product data submittal)
• chiller certified prints
• VFD details and wiring diagrams
• diagrams and instructions for special controls or options
• 19DV Installation Instructions
Equipment Required
• hose and container/injector tool with one end capable of
connecting to 1/2-in. female NPT evaporator charging
valve (for Carrier Inhibitor injection)
• mechanic’s tools (refrigeration)
• digital volt-ohmmeter (DVM)
• true RMS (root mean square) digital multimeter with
clamp-on current probe or true RMS digital clamp-on
ammeter rated for at least 480 vac
• electronic leak detector
• absolute pressure manometer or electronic micron gage
(see Fig. 15)
• drum charging valve (unless refrigerant bottles already
have charging valves)
• charging hose
Fig. 15 — Digital Vacuum Gage
Remove Shipping Packaging — Remove any pack-
aging material from the unit, VFD, and control panels.
Tighten All Gasketed Joints — Gaskets normally
relax by the time the chiller arrives at the jobsite. Tighten all
gasketed joints to ensure a leak-tight chiller (does not apply to
refrigerant joints covered by factory insulation). Gasketed
joints (excluding O-rings) may include joints at some or all of
the following:
• Waterbox covers
• Compressor first suction elbow flanges (at compressor
and at the cooler)
• Compressor secondary suction flanges (at compressor
and low side float chamber)
• Compressor discharge flange
• Cooler inlet line spacer (both sides)
• Envelope control flange (both sides of valve)
• ICP piping flange
• High and low side float chamber covers
See Tables 3 and 4 for bolt torque requirements.
Check Chiller Tightness — Figure 16 outlines the
proper sequence and procedures for leak testing.
The 19DV chillers are shipped without the refrigerant
charge. The chiller is shipped with a 15 psig (103 kPa) dry
nitrogen-holding charge.
If the 15 psig factory nitrogen charge is present, then re-
lease pressure and proceed to pull a deep vacuum on the unit.
Vacuum should be pulled through 11/2-in. female NPT located
under bottom of first stage side of the evaporator. Upon com-
pletion of pulling the required vacuum the chiller can be
charged with refrigerant. The 1/2-in. charging valve on top of
the evaporator shell should be used for charging by lifting
charge cylinder and gravity feed into the evaporator. The
chiller should be charged with refrigerant. If the holding
charge is not present, the chiller must be examined for leaks.
To test for leaks add a small refrigerant holding charge to unit
and pressurize with nitrogen up to 20 psig to determine and
correct the origin of the leak. Use an electronic leak detector
to check all flanges and solder joints after the chiller is pres-
surized. If the 15 psig factory nitrogen charge is present, then
release pressure and proceed to pull a vacuum on the unit.
Unit Start/Stop

16
The chiller should be charged with refrigerant. Follow the
leak test procedure (page 18).
If the chiller is spring isolated, keep all springs blocked
in both directions to prevent possible piping stress and dam-
age during the transfer of refrigerant from vessel to vessel
during the leak test process, or any time refrigerant is being
transferred. Adjust the springs when the refrigerant is in op-
erating condition and the water circuits are full. Any piping
weights are to be separately supported.
Table 3 — Bolt Torque Requirements, Foot Pounds
Table 4 — Bolt Torque Requirements, Foot Pounds (Metric Bolts)
BOLT SIZE
(in.)
SAE 2, A307 GR A
HEX HEAD
NO MARKS
LOW CARBON STEEL
SAE 5
SOCKET HEAD OR HEX
WITH 3 RADIAL LINES, OR SA499
MEDIUM CARBON STEEL
SAE 8
HEX HEAD
WITH 6 RADIAL LINES OR
SA354 GR BD
MEDIUM CARBON STEEL
MINIMUM MAXIMUM MINIMUM MAXIMUM MINIMUM MAXIMUM
1/446 69913
5/16 811 13182028
3/813 19 22 31 32 46
7/16 21 30 35 50 53 75
1/232 45 53 75 80 115
9/16 46 65 75 110 115 165
5/865 95 105 150 160 225
3/4105 150 175 250 260 370
7/8140 200 265 380 415 590
1210 300 410 580 625 893
11/8330 475 545 780 985 1,410
11/4460 660 770 1,100 1,380 1,960
13/8620 885 1,020 1,460 1,840 2,630
11/2740 1060 1,220 1,750 2,200 3,150
15/81010 1450 1,670 2,390 3,020 4,310
13/41320 1890 2,180 3,110 3,930 5,610
17/81630 2340 2,930 4,190 5,280 7,550
21900 2720 3,150 4,500 5,670 8,100
21/42180 3120 4,550 6,500 8,200 11,710
21/23070 4380 5,000 7,140 11,350 16,210
23/45120 7320 8,460 12,090 15,710 22,440
36620 9460 11,040 15,770 19,900 28,440
BOLT SIZE
(METRIC)
CLASS 8.8 CLASS 10.9
MINIMUM MAXIMUM MINIMUM MAXIMUM
M4 1.75 2.5 2.5 3.5
M6 69812
M8 14 20 20 30
M10 28 40 40 57
M12 48 70 70 100
M16 118 170 170 240
M20 230 330 330 470
M24 400 570 570 810
M27 580 830 820 1175

17
Fig. 16 — 19DV Leak Test Procedures
19DV Field Procedure for new unitswith
less than 15 psig holding charge or units
suspected of leaking.
1. Attach compound gage to vessel
2. Note ambient temperature
Raise pressure to 20 psig (138 kPa)
using Nitrogen with added tracer gas for
electronic leak detection
Leak check
Pass
Evacuate vessel and
perform standing
vacuum test
Locate and mark all
leak sources
Dehydrate
Pass
Charge unit
NOTE: Be sure to add refrigerant
as gas until chiller pressure exceeds
15 in Hg (vac) / 380 mmHg (vac)
to avoid possible tube freezing.
Repair all leaks
No Yes
YesNo

18
Refrigerant Tracer — Carrier recommends the use of an
environmentally acceptable refrigerant tracer for leak testing
with an electronic detector.
Ultrasonic leak detectors can also be used if the chiller is
under pressure.
Leak Test Chiller — Due to regulations regarding refrig-
erant emissions and the difficulties associated with separating
contaminants from the refrigerant, Carrier recommends the
following leak test procedure. Refer to Table 5 for refrigerant
pressure/temperature values.
1. If the pressure readings are normal for the chiller
condition:
a. Evacuate the charge from the vessels, if present.
b. Raise the chiller pressure, if necessary, by adding
refrigerant until pressure is at the equivalent satu-
rated pressure for the surrounding temperature.
c. Leak test chiller as outlined in Steps 3 to 9.
2. If the pressure readings are abnormal for the chiller
condition:
a. Prepare to leak test chiller.
b. For cooling machines, check for leaks by connect-
ing a nitrogen bottle with added tracer to allow for
electronic leak detection if possible; otherwise, soap
bubble solution is to be used. Raise the pressure to
20 psig (138 kPa). If electronic leak detector is
available, ensure small amount of tracer material is
added.
c. Plainly mark any leaks that are found.
d. Release the pressure in the system.
e. Repair all leaks.
f. Retest the joints that were repaired (note suggested
test pressure is 20 psig (138 kPa); maximum allow-
able test pressure 45 psig (310 kPa).
3. Check the chiller carefully with an electronic leak detec-
tor or soap bubble solution.
4. Leak Determination — If an electronic leak detector indi-
cates a leak, use a soap bubble solution, if possible, to
confirm. Total all leak rates for the entire chiller. Leakage
at rates greater than 0.1% of the total charge per year
should be repaired. Local regulation governs the require-
ments for when repair of leaks become mandatory. Note
the total chiller leak rate as well as the full charge amount
on the start-up report.
5. If no leak is found during the initial start-up procedures,
complete the transfer of refrigerant gas from the storage
tank to the chiller. Recover any gas used for leak detec-
tion purposes as required per local jurisdiction.
6. If no leak is found after a retest:
a. Perform a standing vacuum test as outlined in the
Standing Vacuum Test section, below.
b. If the chiller fails the standing vacuum test, repeat
leak test and repair.
c. If the chiller passes the standing vacuum test,
dehydrate the chiller. Follow the procedure in the
Chiller Dehydration section, page 20. Charge the
chiller with refrigerant.
7. If the chiller is opened to the atmosphere for an extended
period, evacuate it before repeating the leak test.
NOTE: Alternate optional leak testing method is to isolate
the water circuits and use a portable water heater to raise
the temperature of the cooler and condenser water circuits
to approximately 100°F (38°C) which corresponds to a
pressure of approximately 14.40 psig (99.3 kPag).
Standing Vacuum Test — When performing the
standing vacuum test or chiller dehydration, use a manometer
or a wet bulb indicator. Dial gages cannot indicate the small
amount of acceptable leakage during a short period of time.
1. Attach an absolute pressure manometer or wet bulb indi-
cator to the chiller.
2. Evacuate the vessel to at least 18 in. Hg vac (41 kPa
[abs]), using a vacuum pump or a pumpout unit.
3. Valve off the pump to hold the vacuum and record the
manometer or indicator reading.
a. If the leakage rate is less than 0.05 in. Hg (0.17 kPa)
in 24 hours, the chiller is sufficiently tight.
b. If the leakage rate exceeds 0.05 in. Hg (0.17 kPa) in
24 hours, re-pressurize the vessel and test for leaks.
4. Repair the leak, retest, and proceed with dehydration.
WARNING
Do not use air or oxygen as a means of pressurizing the
chiller. Mixtures of HFO R-1233zd(E) and air at elevated
pressure can undergo combustion, resulting in equipment
damage and possible personal injury.
CAUTION
Never charge liquid refrigerant into the chiller if the pres-
sure in the chiller is less than 15 in. Hg (vac) / 380 mm Hg
(vac) for HFO R-1233zd(E). Charge as a gas only, with
the cooler and condenser pumps running, until this pres-
sure is reached, using PUMPDOWN/LOCKOUT (located
in the Maintenance menu) and END LOCKOUT mode on
the PIC5 control interface. Flashing of liquid refrigerant at
low pressures can cause tube freeze-up and considerable
damage.

19
Table 5 — HFO R-1233zd(E) Pressure and Temperature
TEMP. PRESSURE
F C PSIA PSIG IN HG KPAG KPA ABS MMHG (VAC) % VACUUM
20.0 -6.7 5.16 -9.54 -19.4 -65.8 35.6 493.5 65
22.0 -5.6 5.43 -9.27 -18.9 -63.9 37.4 479.4 63
24.0 -4.4 5.72 -8.98 -18.3 -61.9 39.4 464.6 61
26.0 -3.3 6.01 -8.69 -17.7 -59.9 41.5 449.3 59
28.0 -2.2 6.32 -8.38 -17.1 -57.8 43.6 433.3 57
30.0 -1.1 6.64 -8.06 -16.4 -55.6 45.8 416.7 55
32.0 0.0 6.98 -7.72 -15.7 -53.2 48.1 399.3 53
34.0 1.1 7.33 -7.37 -15.0 -50.8 50.5 381.3 50
36.0 2.2 7.69 -7.01 -14.3 -48.3 53.0 362.6 48
38.0 3.3 8.06 -6.64 -13.5 -45.8 55.6 343.2 45
40.0 4.4 8.45 -6.25 -12.7 -43.1 58.3 323.0 42
42.0 5.6 8.86 -5.84 -11.9 -40.3 61.1 302.0 40
44.0 6.7 9.28 -5.42 -11.0 -37.4 64.0 280.2 37
46.0 7.8 9.72 -4.98 -10.1 -34.3 67.0 257.6 34
48.0 8.9 10.17 -4.53 -9.2 -31.2 70.1 234.2 31
50.0 10.0 10.64 -4.06 -8.3 -28.0 73.4 209.9 28
52.0 11.1 11.13 -3.57 -7.3 -24.6 76.7 184.8 24
54.0 12.2 11.63 -3.07 -6.2 -21.2 80.2 158.7 21
56.0 13.3 12.15 -2.55 -5.2 -17.6 83.8 131.7 17
58.0 14.4 12.69 -2.01 -4.1 -13.8 87.5 103.8 14
60.0 15.6 13.25 -1.45 -2.9 -10.0 91.4 74.9 10
62.0 16.7 13.83 -0.87 -1.8 -6.0 95.4 45.0 6
64.0 17.8 14.43 -0.27 -0.6 -1.9 99.5 14.0 2
66.0 18.9 15.05 0.35 0.7 2.4 103.7 — —
68.0 20.0 15.69 0.99 2.0 6.8 108.1 — —
70.0 21.1 16.34 1.64 3.3 11.3 112.7 — —
72.0 22.2 17.03 2.33 4.7 16.0 117.4 — —
74.0 23.3 17.73 3.03 6.2 20.9 122.2 — —
76.0 24.4 18.46 3.76 7.6 25.9 127.2 — —
78.0 25.6 19.20 4.50 9.2 31.1 132.4 — —
80.0 26.7 19.98 5.28 10.7 36.4 137.7 — —
82.0 27.8 20.77 6.07 12.4 41.9 143.2 — —
84.0 28.9 21.59 6.89 14.0 47.5 148.9 — —
86.0 30.0 22.44 7.74 15.8 53.4 154.7 — —
88.0 31.1 23.31 8.61 17.5 59.4 160.7 — —
90.0 32.2 24.21 9.51 19.4 65.6 166.9 — —
92.0 33.3 25.13 10.43 21.2 71.9 173.3 — —
94.0 34.4 26.08 11.38 23.2 78.5 179.8 — —
96.0 35.6 27.06 12.36 25.2 85.2 186.6 — —
98.0 36.7 28.07 13.37 27.2 92.2 193.5 — —
100.0 37.8 29.10 14.40 29.3 99.3 200.7 — —
102.0 38.9 30.17 15.47 31.5 106.7 208.0 — —
104.0 40.0 31.26 16.56 33.7 114.2 215.5 — —
106.0 41.1 32.39 17.69 36.0 122.0 223.3 — —
108.0 42.2 33.54 18.84 38.4 129.9 231.3 — —
110.0 43.3 34.73 20.03 40.8 138.1 239.5 — —
112.0 44.4 35.95 21.25 43.3 146.5 247.9 — —
114.0 45.6 37.20 22.50 45.8 155.1 256.5 — —
116.0 46.7 38.48 23.78 48.4 164.0 265.3 — —
118.0 47.8 39.80 25.10 51.1 173.1 274.4 — —
120.0 48.9 41.16 26.46 53.9 182.4 283.8 — —
122.0 50.0 42.54 27.84 56.7 192.0 293.3 — —
124.0 51.1 43.97 29.27 59.6 201.8 303.1 — —
126.0 52.2 45.42 30.72 62.6 211.8 313.2 — —
128.0 53.3 46.92 32.22 65.6 222.1 323.5 — —
130.0 54.4 48.45 33.75 68.7 232.7 334.1 — —

20
Chiller Dehydration — Dehydration is recommended if
the chiller has been open for a considerable period of time, if
the chiller is known to contain moisture, or if there has been a
complete loss of chiller holding charge or refrigerant pressure.
Dehydration can be done at room temperatures. Using a
cold trap (Fig. 17) may substantially reduce the time required
to complete the dehydration and is recommended should the
unit be exposed to liquid moisture. The higher the room tem-
perature, the faster dehydration takes place. At low room tem-
peratures, a very deep vacuum is required to boil off any mois-
ture and heating of the water in the water circuits of the chiller
to approximately 100°F (38°C) may be required.
Fig. 17 — Dehydration Cold Trap
Perform dehydration as follows:
1. Connect a high capacity vacuum pump (5 cfm [.002 m3/s]
or larger is recommended) to the refrigerant vacuum/
charging valve (Fig. 2). Tubing from the pump to the
chiller should be as short in length with a minimum diam-
eter of 0.5 in. (13 mm) and as large in diameter as possible
to provide least resistance to gas flow.
2. Use an absolute pressure manometer or a electronic mi-
cron gage to measure the vacuum. Open the shutoff valve
to the vacuum indicator only when taking a reading.
Leave the valve open for 3 minutes to allow the indicator
vacuum to equalize with the chiller vacuum.
3. If the entire chiller is to be dehydrated, open all isolation
valves (if present).
4. With the chiller ambient temperature at 60°F (15.6°C) or
higher, operate the vacuum pump until the manometer
reads 29.8 in. Hg (vac), -14.63 psig (-100.9 kPag), or a
vacuum indicator reads 35°F (1.7°C). Operate the pump
an additional 2 hours.
Do not apply a greater vacuum than 29.82 in. Hg vac
(757.4 mm Hg) or go below 33°F (0.56°C) on the wet
bulb vacuum indicator. At this temperature and pressure,
isolated pockets of moisture can turn into ice. The slow
rate of evaporation (sublimation) of ice at these low tem-
peratures and pressures greatly increases dehydration
time.
5. Valve off the vacuum pump, stop the pump, and record
the instrument reading.
6. After a 2-hour wait, take another instrument reading. If
the reading has not changed, dehydration is complete. If
the reading indicates vacuum loss, repeat Steps 4 and 5.
7. If the reading continues to change after several at-
tempts, perform a leak test (maximum 45 psig [310
kPa] pressure). Locate and repair the leak, and repeat
dehydration.
8. Once dehydration is complete, the evacuation process can
continue. The final vacuum prior to charging the unit with
refrigerant should in all cases be 29.9 in. Hg (500 mi-
crons, 0.07 kPa [abs]) or less.
Inspect Water Piping — Refer to piping diagrams pro-
vided in the certified drawings and the piping instructions in
the 19DV Installation Instructions manual. Inspect the piping
to the cooler and condenser. Be sure that the flow directions are
correct and that all piping specifications have been met.
Piping systems must be properly vented with no stress on
waterbox nozzles and covers. Water flows through the cooler
and condenser must meet job requirements. Measure the pres-
sure drop across the cooler and the condenser.
Check Safety Valves — Be sure safety valves have
been piped to the outdoors in compliance with the latest edition
of ANSI/ASHRAE Standard 15 and applicable local safety
codes. Piping connections must allow for access to the valve
mechanism for periodic inspection and leak testing.
The standard 19DV relief devices are set to relieve at
57 psig (393 kPa) chiller design pressure. To avoid potential
rupture the chiller should never be pressurized above 45 psig
(310 kPa) for any testing purpose.
Inspect Wiring
1. Examine the wiring for conformance to the job wiring di-
agrams and all applicable electrical codes.
2. Compare the ampere rating on the VFD nameplate to rat-
ing on the compressor nameplate.
3. Check and record voltage across power wires to the VFD;
measure phase to phase and phase to ground. Validate
against VFD nameplate.
4. Ensure that VFDs are protected by fused disconnects or
circuit breakers as per electrical code.
CAUTION
Do not start or megohm-test the compressor motor or any
other pump motor, even for a rotation check, if the chiller is
under dehydration vacuum. Insulation breakdown and
severe damage may result.
WARNING
Power to the motor and starter must be disconnected by an
isolation switch before placing the machine under a vac-
uum. To be safe, isolate input power before evacuating the
chiller if you are not sure if there are live leads to the her-
metic motor.
CAUTION
Water must be within design limits, clean, and treated to
ensure proper chiller performance and to reduce the poten-
tial of tube damage due to corrosion, scaling, or erosion.
Carrier assumes no responsibility for chiller damage result-
ing from untreated or improperly treated water.
WARNING
Do not check the voltage supply without proper equipment
and precautions. Serious injury may result. Follow power
company recommendations.
CAUTION
Do not apply any kind of test voltage, even for a rotation
check, if the chiller is under a dehydration vacuum. Insula-
tion breakdown and serious damage may result.