Product
Data
23XL
Hermetic Screw Liquid Chiller
50/60 Hz
60 Hz — 150 to 360 Nominal Tons (530 to 1,270 kW)
50 Hz — 130 to 300 Nominal Tons (460 to 1,060 kW)
The 23XL screw chiller provides the
performance and reliability of a
centrifugal class machine by using
advanced engineering technology.
Optimized for low life cycle costs, the
23XL offers superior value in a
compact design.
Features/Benefits
• Exceptional full and part load
efficiencies, coupled with a design
that is easy to install and maintain, provide low overall cost of
ownership.
• The rugged, reliable, and fully
field serviceable compressor is designed for a lifetime of troublefree operation.
• A low leak, ASME certified, positive
pressure design uses environmentally acceptable HCFC-22 or
HFC-134a refrigerant.
• Innovative direct digital controls
combine an easy to use Local Interface Device (LID) with sophisticated capabilities.
• Carrier’s factory testing program
ensures quality while providing
peace of mind and protecting your
chiller investment.
Low operating costs
Advanced internally and externally enhanced heat transfer surfaces provide exceptional thermal
performance.
Precise compressor tolerances in
a design optimized for air-conditioning
duty provide superior compression
efficiency.
Integral FLASC (FLAsh SubCooler)
increases the refrigeration effect and
reduces compressor power
consumption.
Copyright 1996 Carrier Corporation
Form 23XL-3PD
Variable refrigerant metering
eliminates inefficient vapor bypass and
provides superior part-load performance when compared to fixed orifice
metering designs.
High efficiency hermetic motors,
cooled by liquid refrigerant, reduce
motor electrical losses.
Low installation costs
A positive pressure design reduces
the size of the chiller by as much as
35% when compared to negative
pressure designs. The reduced machine
size results in lower floor space
requirements and easier installation.
The take-apart bolted design
incorporates flanges on all major connections. Disassembly enables major
components to easily fit through tight
spaces. This eliminates the expense
and inconvenience of cutting and
welding, proving that the 23XL is an
ideal replacement chiller.
Hermetic design eliminates additional machine room cooling requirements and reduces installation costs.
Single point electrical connection,
provided with the optional unitmounted starter, eliminates start-up
problems caused by miswiring and further reduces installation costs.
Quiet operation reduces the need
for costly sound insulation in acoustically demanding applications.
Elimination of the purge device
means no purge vent or water piping
is required.
The hermetic twin screw compressor is designed specifically for air-conditioning and
light-brine duty.
Proprietary manufacturing techniques yield rotor clearances measured in microns for unsurpassed
compression efficiency.
AFBMA (Anti-Friction Bearing
Manufacturers Association) Class
5 compressor bearings provide
precise rotor positioning to reduce
compressor wear. Carrier’s unique
design provides the most conservatively loaded bearing system in the
industry.
Bottom-mounted capacity control
slide valve offers inherently accurate positioning, preventing the wear
potential associated with top-mounted
designs.
Motor cooling is provided via the
same simple system proven effective
in the Carrier 19D series hermetic
centrifugal chillers.
Optional Variable VI (Volumetric
Index) offers simple, automatically
controlled, compression ratio control
for optimized dual duty applications
such as comfort cooling and thermal storage.
Low leak, positive pressure
design minimizes environmental impact and saves money.
Positive pressure design uses
refrigerant HCFC-22 or HFC-134a.
ASME (American Society of Mechanical Engineers) construction requires rigorous pressure testing
and ensures leak-tight assembly.
O-ring seals on the hermetic compressor replace leak-prone gaskets.
Straight-thread, O-ring sealed fittings replace leaky, tapered pipe
thread fittings.
Brazed joints provide tight seals,
and flare connections are used for service joints only.
Use of positive pressure refrigerants result in a smaller footprint,
reducing installation costs and providing more rentable space.
Positive pressure keeps air and
moisture out of the chiller, eliminating
the need for a purge device and the
associated loss of refrigerant.
Direct Digital Product Integrated
Control (PIC) provides unsurpassed
flexibility and functionality. The PIC
can be easily integrated directly into
the Carrier Comfort Network.
The Product Integrated Control
(PIC) monitors over 100 functions
and conditions. In addition, it displays
over 125 operating states and diagnostic messages for improved operator
control.
A Proportional/Integral/Derivative
(PID) control algorithm provides
tight chilled water control without
hunting.
Low maintenance costs
A field serviceable twin screw
compressor dramatically reduces
maintenance expenses when compared
to compressor exchange programs.
Elimination of the oil pump, oil
cooler, and purge device equates to
fewer parts that require maintenance.
Direct digital controls provide
preventive and predictive maintenance
algorithms for increased machine
uptime and reduced service expenses.
Optional refrigerant discharge
isolation valves enable service personnel to store the refrigerant charge
in the cooler or condenser during
servicing.
2
Table of contents
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Machine Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,12
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-15
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16,17
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-27
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-33
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34,35
Typical Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-39
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-46
Features/Benefits (cont)
Automatic two chiller lead/lag
capability provides integral standby
controls.
A 16 line by 40 character LCD
display offers ‘‘all in one glance’’
access to key chiller operating
information.
Local Interface Device (LID) provides unparalled ease of user interface. The LCD display features 4
menu specific softkeys and a simple,
intuitive design.
Modular pull-out/plug-in design
requires minimal wiring and simplifies
installation.
Low voltage design is safe and
reliable.
Battery backup provides protection during power failures and eliminates time consuming control
reconfiguration.
The extensive service menu can be
password protected to prevent unauthorized access. Diagnostic capabilities
assist technicians in troubleshooting
and recommend proper corrective
action for pre-set alarms, resulting in
greater machine uptime.
An automatic capacity override
feature prevents nuisance shutdowns
by unloading the compressor whenever key safety limits are approached.
Encapsulated circuit boards,
designed and built by Carrier, offer
superior reliability compared to open
board designs. Stringent quality
standards are enforced and ensured
through in-house construction.
Optional control modules offer
unique control expandability that
includes chilled water reset, demand
limit from remote sources, and much,
much more.
Extensive factory testing
Components are tested individually and after assembly to ensure quality and outstanding
performance.
ASME inspections of all pressure
vessels occur at major points of
assembly. ASME rated materials and
processes result in the ‘‘U’’ stamp,
a sign of pressure vessel integrity.
Compressors are 100% run tested
before mounting as an additional
step in the quality process to ensure
proper functioning.
Hydrostatic vacuum and pressure
testing of assembled chillers ensures leak integrity.
The controls and optional unitmounted starter are tested after
mounting to verify proper electrical
functioning.
An optional certified or witnessed
ARI (Air Conditioning and Refrigeration Institute) 550 performance test is available.
Storage tank and pumpout
system
Carrier’s policy is to protect the
environment by ensuring the
containment of refrigerant during both
operation and service. To help meet
this requirement, the 23XL chiller can
be teamed with an optional partner:
The 19XB Positive Pressure Storage System. See the 19XB Product
Data manual for further details.
3
Model number nomenclature
LEGEND
VI — Volumetric Index
Underwriters’
Laboratory
Canada
4
ASME
‘U‘ Stamp
Underwriters’
Laboratories
ARI (Air Conditioning
and Refrigeration
Institute)
Performance Certified
Carrier Corporation,
TR-1 Plant
Registered to ISO 9001
Certificate No. A1028
Features/Benefits (cont)
23XL HERMETIC SCREW LIQUID CHILLER (FRAME 1 AND 2 CHILLERS)
Technologically advanced chillers designed to answer
today’s environmental and energy-efficiency concerns
• Compact positive pressure design provides migration path to HFC’s
• Low sound levels for the most demanding acoustic applications
• Variable refrigerant metering for superior part-load performance
• High efficiency design optimized for air-conditioning/light brine duty
• Comprehensive factory testing program
MICROPROCESSOR CONTROL
CENTER
• 16 line x 40 character LCD
display
• ‘‘All in one glance’’ access to key
chiller operating data
• Monitors over 100 functions and
conditions
• Displays over 125 operating and
diagnostic conditions
• Carrier Comfort Network (CCN)
compatible
OIL SEPARATOR
• Two-stage design,
vortex and coalescing
• Sight glass to monitor
oil level
BOLT-ON WATERBOXES
• Provides full bundle access
during tube cleaning
• ASA 150 flanges
simplify installation
ECONOMIZER
• Simple, reliable,
no moving parts
RABBET-FIT CONNECTOR
• Simplifies installation for tight
access applications
• Complements flanged component
design
• Ideal replacement chiller
HEAT EXCHANGERS
• ASME refrigerant side
construction
• High performance internally
and externally enhanced tubes
• Tubing roller expanded into
double grooved tube sheets
• Patented condenser flash
subcooler
COMPRESSOR
• Field serviceable twin-screw design
• Bottom mounted slide valve
• AFBMA Class 5 bearings
• HCFC-22
• Optional variable Volume Index (VI) control
5
Feature/Benefits (cont)
23XL HERMETIC SCREW LIQUID CHILLER (FRAME 4 CHILLERS)
Technologically advanced chillers designed to answer
today’s environmental and energy-efficiency concerns
• Compact positive pressure design provides migration path to HFC’s
• Low sound levels for the most demanding acoustic applications
• Variable refrigerant metering for superior part-load performance
• High efficiency design optimized for air-conditioning/light brine duty
• Comprehensive factory testing program
MICROPROCESSOR CONTROL
CENTER
• 16 line x 40 character LCD
display
• ‘‘All in one glance’’ access to key
chiller operating data
• Monitors over 100 functions and
conditions
• Displays over 125 operating and
diagnostic conditions
• Carrier Comfort Network (CCN)
compatible
OIL SEPARATOR
• High efficiency
coalescing design
• Sight glasses to
monitor oil level
NOZZLE-IN-HEAD
WATERBOXES
• Victaulic grooved nozzles
are standard
• ASA 150 and 300 flanges
available
• Marine waterboxes are
optional
ECONOMIZER
• Simple, reliable,
no moving parts
RABBET-FIT CONNECTOR
• Simplifies installation for
tight access applications
• Complements flanged
component design
• Ideal replacement chiller
COMPRESSOR
• Field serviceable twin-screw design
• Bottom mounted slide valve
• AFBMA Class 5 bearings
• HCFC-22/HFC-134a compatible
• Optional variable Volume Index (VI) control
6
HEAT EXCHANGERS
• ASME refrigerant side
construction
• High performance
internally and externally
enhanced tubes
• Tubing roller expanded
into double groove tube
sheets
• Patented condenser
flash subcooler
23XL Refrigeration Cycle
The compressor continuously draws
refrigerant vapor from the cooler at a
rate determined by the position of
the capacity control slide valve. This
compressor suction reduces the
pressure in the cooler and causes the
remaining refrigerant to boil vigorously at a low temperature (typically
38 to 42 F [3 to 6 C]).
The energy required for boiling is
obtained as heat from the water (or
brine) flowing through the cooler
tubes. With heat removed, the chilled
water (brine) can then be used for
air conditioning or for process
cooling.
After removing heat from the water
(brine), the refrigerant vapor passes
through the compressor. Compression
adds more energy to the refrigerant,
raising its temperature upon discharge
(typically 75 to 95 F [24 to 35 C]) to
a level above that of the water flowing
through the condenser tubes. This
relatively cool condensing water
removes some of the heat from the
vapor, causing it to condense into
a liquid.
The liquid refrigerant passes
through orifices into the FLASC
(FLAsh SubCooler) chamber. Since
the FLASC chamber is at a lower
pressure, part of the liquid refrigerant
flashes to vapor, thereby cooling the
remaining liquid. The FLASC vapor is
recondensed on the tubes which
carry the entering condenser water.
The liquid then passes through a floattype metering device before returning to the cooler. This float device
maintains a liquid seal to eliminate
inefficient vapor bypass from the
FLASC chamber to the cooler.
On certain models, an economizer
is installed between the cooler and
condenser. With these models, the
float valve meters liquid refrigerant
into the economizer instead of the
cooler. Pressure in this chamber is
intermediate between condenser and
cooler pressures. At this lower
pressure, some of the liquid refrigerant flashes to vapor, cooling the
remaining refrigerant. The vapor returns directly to the compressor where
it mixes with vapor from the cooler
at an intermediate point of compression. This provides an increase in
the mass flow of refrigerant, resulting
in an increase in capacity. The cooled
liquid refrigerant in the economizer
is metered through a float-type metering device into the cooler. Because
pressure in the cooler is lower than
the economizer pressure, some of the
liquid flashes and cools the remainder to evaporator (cooler) temperature.
During both the economized and
non-economized cycles, liquid refrigerant returns to the cooler to replenish
the refrigerant leaving as a result of
compressor suction. The cycle is now
complete.
7
Features/Benefits (cont)
TYPICAL 23XL REFRIGERATION CYCLE ECONOMIZED CHILLERS
TYPICAL 23XL REFRIGERATION CYCLE NON-ECONOMIZED CHILLERS
8
SCREW COMPRESSOR COMPONENTS
1
2
3
4
5
6
7
8
9
10
TAKE-APART DESIGN
SIMPLIFIES INSTALLATION
—
—
—
—
—
—
—
—
—
—
Control Oil Lines
Capacity Control Solenoid Valve
Discharge Bearing Assemblies
Male Rotor
Semi-Hermetic Motor
Female Rotor
Rotor Oil Injection Port
Suction Inlet Flange
Capacity Control Slide Valve
Slide Piston Seals
TYPICAL RABBET-FIT BOLT CONNECTOR
FOR EASY REALIGNMENT
9
Options and accessories
ITEM
Shipped Factory Charged with Refrigerant
Shipped Factory Charged with Nitrogen
One, 2, or 3 Pass Cooler or Condenser Waterside Construction
Full Insulation (except waterbox covers)
Refrigerant Isolation Package
Waterbox Options (Frame 4 Machines Only):
300 psig (2068 kPa) Nozzle-in-Head Waterboxes
300 psig (2068 kPa) Marine Waterboxes
300 psig Flanged Cooler and/or Condenser Waterbox Nozzles
Automatic Electric Hot Gas Bypass
Unit-Mounted Wye-Delta or Solid-State Low Voltage Starter
Remote Motor Wye-Delta or Solid-State Low Voltage Starter
Control Options Module
.028- or .035-in. Internally/Externally Enhanced Copper Tubing —
Cooler/Condenser
.028- or .035-in. Smooth Bore/Externally Enhanced Copper Tubing —
Cooler/Condenser
.028- or .035-in. Smooth Bore/Externally Enhanced Cupronickel Tubing —
Condenser
.028- or .035-in. Internally/Externally Enhanced Cupronickel Tubing —
Condenser
.025- or .028-in. Wall Tubes, Internally Enhanced Condenser
.025- or .028-in. Wall Tubes, Titanium, Smooth Bore, Condenser
Factory Performance Test
Export Crating
Extended Warranty (NAO [North American Operations] Only)
Service Contract
Acoustical Sound Insulation Kit
Field Mounting Kit (Unit-Mounted Starters)
Storage Tank and Pumpout Unit
Stand Alone Pumpout Unit
Soleplate Package
Spring Isolators
Spare Sensor Package
Control Options Module Upgrade Kit
Flow Switch, Differential Pressure Type
OPTION*
X
X
X
X
X
X
X
X
X
X
ACCESSORY†
*Factory Installed.
†Field Installed.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
UNIT-MOUNTED STARTER FEATURES AND OPTIONS
ITEM
NEMA 1 Enclosure with Integral Fan Cooling and Lockable
Hinged Doors
Carrier Starter Management Module and 5 Pilot Relays
1 kVa Controls/Oil Heater Transformer with Branch Circuit Breaker
Microprocessor Based Overload Trip Protection
Main Power Disconnect (Non-Fused Type) with Shunt Trip
Normal Interrupt Capacity Main Circuit Breaker with Shunt Trip
High Interrupt Capacity Main Circuit Breaker with Shunt Trip
Phase Loss/Reversal Imbalance Protection
Ground Fault Protection
Integral SCR Bypass Contactor
Three-Phase Digital Ammeter
Three-Phase Analog Ammeter with Switch
Three-Phase Digital Voltmeter
Three-Phase Analog Voltmeter with Switch
Three-Phase Over/Under Voltage Protection
Power Factor Digital Meter
Frequency Digital Meter
Digital Watt Meter
Digital Watt Hour Meter
Digital Power Factor Meter
Digital Watt Demand Meter
Digital Var Meter
IQ Data Plus II
Lightning Arrestor and Surge Capacitor Package
Kilowatt Transducer with 4 to 20 mA Output
Power Factor Correction Capacitors
10
WYE-DELTA SOLID STATE
S
S
S
S
S*
S
O
O
S*
S*
N/A
S*
O
O†
O
O†
O†
O†
O†
O†
O†
O†
O†
O†
O
O
O
S
S
S
N/A
S
O
S
S
S
S
O
S
O
S
S
S
N/A
N/A
N/A
N/A
N/A
N/A
O
O
O
LEGEND
N/A
— Not Applicable
NEMA — National Electrical
Manufacturers
Association
S
— Standard Feature
SCR
— Silicon Control Rectifier
O
— Optional
Var
— Volts Amperes Reactive
(Reactive Power)
*Included in the Standard IQ 1000 II™
Motor Protection system.
†Requires IQ Data Plus II™ system.
Machine components
FRONT VIEW
1 — Power Panel
2 — Local Interface Display (LID) Control Center
3 — ASME (American Society of Mechanical
Engineers) Nameplate, Cooler
4 — Cooler Refrigerant Isolation Valve
5 — ASME Nameplate, Economizer (Hidden)
6 — Service Valve
7 — Take-Apart Rabbet Fit Connector (Lower)
8 — Cooler Temperature Sensor
9 — ASME Nameplate, Condenser
10 — Typical Waterbox Drain Port
11 — Cooler Supply/Return End
Waterbox Cover
12 — Condenser Supply/Return End
Waterbox Cover
13 — Compressor Nameplate
REAR VIEW
14
15
16
17
18
19
20
21
22
23
24
25
26
—
—
—
—
—
—
—
—
—
—
—
—
—
Oil Separator
ASME Nameplate, Muffler (Hidden)
ASME Nameplate, Oil Separator
Cooler Relief Valves (Hidden)
Oil Sump Filter Assembly
Oil Charging Valve
Vessel Separation Feet
Float Chamber
Condenser Isolation Valve (Option)
Refrigerant Charging Valve
Condenser
Condenser Relief Valves (Hidden)
Take-Apart Rabbet Fit Connector
(Upper)
27 — Unit Mounted Starter (Option)
28 — Machine Identification Nameplate
FRAME 1 AND 2 MACHINES
11
Machine components (cont)
FRONT VIEW
1
2
3
4
—
—
—
—
5 —
6 —
7 —
8
9
10
11
12
13
14
15
16
17
—
—
—
—
—
—
—
—
—
—
18
19
20
21
22
23
24
25
26
27
28
29
30
31
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Compressor Nameplate
Power Panel
Local Interface Display (LID) Control Center
ASME (American Society of Mechanical
Engineers) Nameplate, Cooler
Cooler
Vessel Separation Feet
Economizer Float Valve Access Cover
(Hidden)
Refrigerant Charging Valve
Economizer
Oil Filter Assembly (Hidden)
ASME Nameplate, Economizer
Typical Waterbox Drain Port
Take-Apart Rabbet Fit Connector
ASME Nameplate, Condenser
Cooler Supply/Return End Waterbox Cover
Condenser Temperature Sensors
Cooler Relief Valve
REAR VIEW
Unit Mounted Starter (Option)
ASME Nameplate, Oil Separator
Oil Separator Relief Valves
Oil Separator
Oil Charging Valve
Condenser Isolation Valve (Option)
Service Valve
Cooler Refrigerant Isolation Valve
Condenser Relief Valves and Oil Filter
Float Chamber
Poppet Valve Assembly
Motor Cooling Isolation Valve
Condenser
Condenser Supply/Return End
Waterbox Cover
32 — Cooler Temperature Sensors
33 — Machine Identification Nameplate
FRAME 4 MACHINES
12
Physical data
NOMINAL
CAPACITY
TONS (kW)
60 Hz 50 Hz
Size
Frame
Size
Frame
150
(530)
130
(460)
10,11
1
10,11
1
185
(650)
150
(530)
10,11
1
10,11
200
(700)
165
(580)
10,11
1
230
(810)
190
(670)
20,21
250
(880)
205
(720)
20,21
COOLER
CONDENSER
ECONOMIZER
COMPRESSOR
Size
VI
N
C2
0 or 1
1
N
C4
0
10,11
1
Y
C4
0 or 1
2
20,21
2
N
C6
0
2
20,21
2
Y
C6
0 or 1
TOTAL
TOTAL
REFRIGERANT OPERATING
UNIT
DRY
WEIGHT
WEIGHT*
MOUNTED
WEIGHT
STARTER
lb
kg
lb
kg
lb
kg
Y
9,750 4423
600
272
11,055 5015
N
9,250 4196
600
272
10,555 4788
Y
9,750 4423
600
272
11,055 5015
N
9,250 4196
600
272
10,555 4788
Y
10,050 4559
650
295
11,410 5176
N
9,550 4332
650
295
10,910 4949
Y
10,630 4822
700
318
12,210 5538
N
10,130 4595
700
318
11,710 5312
Y
10,930 4958
750
340
12,560 5697
N
10,430 4731
750
340
12,060 5470
NOMINAL
UNIT
CAPACITY
COOLER
CONDENSER
COMPRESSOR
MOUNTED
ECONOMIZER
TONS (kW)
STARTER
60 Hz 50 Hz Size Frame Size Frame
Size
VI
Y
275
230
40
4
40
4
N
D4
0 or 1
(968) (810)
N
Y
300
250
41
4
41
4
Y
D4
0 or 1
(1056) (880)
N
Y
325
270
42
4
42
4
N
D6
0 or 1
(1144) (950)
N
Y
360
300
43
4
43
4
Y
D6
0 or 1
(1270) (1060)
N
LEGEND
NIH
— Nozzle-In-Head
MWB — Marine Waterbox
VI
— Volumetric Index
*Indicates HCFC-22 refrigerant.
NOTES:
1. Frame 1 and 2 machine weights are based on 2-pass, 150 psig
(1034 kPa) heat exchangers with 0.035 in. wall thickness and copper tubes. Add Refrigerant Weight to Total Dry Weight to obtain Rigging Weight with factory charge.
TOTAL
REFRIGERANT
DRY WEIGHT
WEIGHT*
lb
16,110
15,610
16,915
16,415
16,730
16,230
17,585
17,085
kg
7307
7080
7672
7445
7588
7361
7976
7749
lb
900
900
1100
1100
1100
1100
1300
1300
kg
408
408
499
499
499
499
590
590
TOTAL
OPERATING
WEIGHT
lb
kg
17,850 8097
17,350 7870
18,940 8592
18,440 8365
18,860 8555
18,360 8328
20,020 9081
19,520 8855
2. Frame 4 machine weights are based on 2-pass, 150 psig (1034 kPa),
NIH waterbox arrangements with 0.025 in. wall thickness and Turbo-B2
tubes. To calculate Frame 4 MWB vessel weight, refer to the computer selection program.
3. To obtain chiller weights on Frame 4 machines using HFC-134a
refrigerant, refer to the Computer Selection Program or contact
Syracuse.
4. All weights are given for reference only. Refer to the computer selection program for specific machine configuration weights.
13
Physical data (cont)
COMPRESSOR WEIGHTS
23XL
UNIT
ASSEMBLY
lb
kg
2270
1029
2300
1043
2400
1088
3300
1497
3400
1542
COMPRESSOR SIZE
C2
C4
C6
D4
D6
Frame 1
Frame 2
Frame 4
COMPONENT WEIGHTS
FRAME 1 AND 2
lb
kg
1180
535
296
134
170
77
COMPONENT
Oil Separator
Economizer†
Muffler
Discharge Piping:
Pipe
Isolation Valve†
Adaptor Flange
Power Panel
Starter†
Control Center
44
30
76
20
500
31
FRAME 4
lb
kg
2880*
1306*
560
254
*
*
20
14
34
9
227
14
—
30
76
20
500
31
—
14
34
9
227
14
*The Frame 4 muffler is included in the oil separator weight.
†Optional.
MOTOR WEIGHTS*
COMPRESSOR
Size
C2
VI Type
0
0
1
0 or 1
0 or 1
0 or 1
C4
C6
D4
D6
STATOR
MAX IkW
lb
230
249
276
276
460
460
125
155
195
195
280
280
kg
104
113
125
125
208
208
ROTOR
lb
58
63
69
69
110
110
kg
26
29
31
31
49
49
MOTOR CASING
AND COVER
lb
kg
310
141
310
141
310
141
310
141
370
167
370
167
LEGEND
IkW — Input Kilowatt
VI
— Volumetric Index
*C2-C6 listed weights are for low-voltage motors (200-600 v). D4 and D6 listed weights are for low-voltage motors (320-600 v).
HEAT EXCHANGER WEIGHTS
ENGLISH
DRY WT (lb)*
SIZE
Cooler
Only†
Cond
Only
10
11
20
21
40
41
42
43
2480
2650
2845
3000
5030
5180
5345
5525
2890
3020
3250
3445
4690
4835
5005
5185
MACHINE CHARGE
Refrigerant (lb)
Economizer
No Economizer
HCFC-22 HFC-134a HCFC-22 HFC-134a
650
**
600
**
650
**
600
**
750
**
700
**
750
**
700
**
1000
850
900
800
1100
900
1000
850
1200
950
1100
900
1300
1000
1200
950
Water (gal)
Cooler
Cond
34
40
45
49
49.2
54
60
66
39.2
44.4
49.2
56.4
51.6
57
63
70
SI
DRY WT (kg)*
SIZE
Cooler
Only†
Cond
Only
10
11
20
21
40
41
42
43
1125
1202
1291
1361
2282
2350
2424
2506
1310
1370
1474
1563
2127
2193
2270
2352
14
MACHINE CHARGE
Refrigerant (kg)
Economizer
No Economizer
HCFC-22 HFC-134a HCFC-22 HFC-134a
295
**
272
**
295
**
272
**
340
**
318
**
340
**
318
**
454
385
408
363
499
408
454
385
544
431
499
408
590
454
544
431
Water (L)
Cooler
Cond
130
152
170
186
186
204
227
250
150
168
186
214
195
216
239
264
LEGEND
NIH — Nozzle-In-Head
*Weight based on:
.035 in. wall copper Turbo-B2 tubes in cooler, Turbo chill in
condenser.
2-pass, 150 psig (1034 kPa) NIH waterbox arrangements
(sizes 10, 11, 20, 21)
3-pass, 300 psig (2068 kPa) NIH waterbox arrangements
(sizes 40, 41, 42, 43)
†Weight of optional economizer is not included and must be added
to cooler weight.
**Not available.
NOTE: Standard shipment is with refrigerant charged, so be sure
to add refrigerant charge to dry weight.
WATERBOX COVER WEIGHTS (FRAME 1 AND 2 CHILLERS)*
HEAT EXCHANGER
WATERBOX
DESCRIPTION
PSI
(kPa)
Cooler or
Condenser
NIH, 1 Pass
NIH, 2 Pass (Plain)
NIH, 2 Pass (With Pipe Nozzles)
150
(1034)
NIH, 3 Pass
150
(1034)
FRAME 1
FRAME 2
lbs
118
100
185
kg
54
46
84
lbs
128
148
200
kg
58
67
91
166
76
180
82
LEGEND
NIH — Nozzle-In-Head
*These weights are given for reference only. They have been included in heat exchanger weights
shown in the Heat Exchanger Weights table on page 14.
NOTE: Add 30 lb (14 Kg) for bolts.
WATERBOX COVER WEIGHT (FRAME 4 CHILLERS)*
HEAT
EXCHANGER
COOLER
CONDENSER
WATERBOX
DESCRIPTION
NIH, 1 Pass Cover
NIH, 2 Pass Cover
NIH, 3 Pass Cover
NIH, Plain End Cover
MWB Cover
Plain End Cover
NIH, 1 Pass Cover
NIH, 2 Pass Cover
NIH, 3 Pass Cover
NIH, Plain End Cover
MWB Cover
Plain End Cover
ENGLISH (lb)
Frame 4,
Frame 4,
Std Nozzles
Flanged
150 psig
300 psig
150 psig
300 psig
284
414
324
491
285
411
341
523
292
433
309
469
243
292
243
292
CS
621
CS
621
CS
482
CS
482
306
446
346
523
288
435
344
547
319
466
336
502
226
271
226
271
CS
474
CS
474
CS
359
CS
359
SI (kg)
Frame 4,
Frame 4,
Std Nozzles
Flanged
1034 kPa
2068 kPa
1034 kPa
2068 kPa
129
188
147
223
129
187
155
237
133
197
140
213
110
133
110
133
CS
282
CS
282
CS
219
CS
219
139
202
157
237
131
197
156
248
145
212
153
228
103
123
103
123
CS
215
CS
215
CS
163
CS
163
LEGEND
CS
— Contact Syracuse
MWB — Marine Waterbox
NIH
— Nozzle-In-Head
*These weights are given for reference only. The 150 psig (1034 kPa) standard waterbox cover
weights have been included in the heat exchanger weights shown in the Heat Exchanger Weights
table on page 14.
15
Dimensions
23XL FRAME 1 AND 2 CHILLERS
NOTES:
1. Service access should be provided per ANSI/ASHRAE 15 (American National Standards Institute/
American Society of Heating Refrigeration and Air Conditioning Engineers), Latest Edition, NFPA
(National Fire Protection Association) 70, and local safety codes.
2. A minimum of 6 in. overload clearance for service rigging is recommended.
3. Certified drawings available upon request.
4. ( ) indicates millimeters.
HEAT EXCHANGER
SIZE
10 or 11
20 or 21
A (LENGTH)
1 Pass
2 and 3 Pass*
ft-in.
mm
ft-in.
mm
9-5
2870
9-6 ⁄
12
2908
OVERALL
B (WIDTH)
ft-in.
4- 91⁄4
4-11
mm
1454
1499
OVERALL
C (HEIGHT)
ft-in.
6- 95⁄8
6-113⁄8
*2 and 3-pass length applies if either (or both) cooler or condenser is a 2 or 3-pass design.
16
mm
2073
2118
NOZZLE PIPE SIZE
(in.)
1-Pass
6
8
2 and 3-Pass
6
6
23XL FRAME 4 CHILLERS
NOTES:
1. For flanged waterbox nozzles, refer to the certified drawings for length addition measurements.
2. Service access should be provided based on American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) 15,
latest edition, National Fire Protection Association (NFPA) 70, and local safety codes.
3. A minimum of 6 in. (152 mm) overhead clearance for service rigging is recommended.
4. Certified drawings are available upon request.
5. ( ) indicates millimeters.
HEAT EXCHANGER
(Cooler and
Condenser Size)
40-43
A (LENGTH)
2 Pass*
1 or 3 Pass†
ft-in.
mm
ft-in.
mm
4159
14-31⁄4
4350
13-73⁄4
HEAT EXCHANGER
(Cooler and
Condenser Size)
40-43
OVERALL
B (WIDTH)
ft-in.
5-107⁄8
mm
1800
OVERALL
C (HEIGHT)
ft-in.
7-611⁄16
mm
2303
NOZZLE PIPE SIZE (in.)
(Nominal Pipe Size)
1-Pass
10
2-Pass
8
3-Pass
6
A (Length With
Marine Waterbox — Not Shown)
2 Pass*
1 or 3 Pass†
ft-in.
mm
ft.-in.
mm
14-95⁄8
4512
16-51⁄2
5017
*Assumes both cooler and condenser nozzles on same end of chiller.
†1 or 3 pass length applies if either (or both) cooler or condenser is a 1 or 3 pass design.
17
Electrical data
COMPRESSOR
Size
VI Type
C2
0
MOTOR
ELECTRICAL
CHARACTERISTICS
RLA per IkW
LRA Wye
LRA Delta
RLA per IkW
LRA Wye
LRA Delta
RLA per IkW
LRA Wye
LRA Delta
RLA per IkW
LRA Wye
LRA Delta
RLA per IkW
LRA Wye
LRA Delta
0
C4
1
C6
0 or 1
D4, D6
0 or 1
60 Hz MOTORS
Low Voltage
Max
IkW
125
155
195
195
280
208 V
230 V
400 V
460 V
575 V
3.01
789
2465
3.04
1026
3206
2.97
990
3095
2.97
990
3095
3.04
1530
4780
2.86
713
2229
2.95
928
2899
2.73
896
2799
2.73
896
2799
2.74
1325
4139
1.61
388
1212
1.61
475
1485
1.59
566
1770
1.59
566
1700
1.61
798
2493
1.39
331
1035
1.38
390
1217
1.36
448
1399
1.36
448
1399
1.40
662
2070
1.12
269
840
1.12
323
1010
1.09
358
1120
1.09
358
1120
1.12
529
1853
LEGEND
IkW
— Compressor Motor Power Input (Kilowatts)
LRA — Locked Rotor Amps
OLTA — Overload Trip Amps (= RLA x 1.08)
RLA — Rated Load Amps
VI
— Volumetric Index
NOTES:
1. Standard Voltages:
Volt
208/230*
200†
230†
400
460
575
60 Hz
For Use on
Supply Voltages
200 to 240 v systems
200 to 208 v systems
220 to 240 v systems
360 to 429 v systems
440 to 480 v systems
550 to 600 v systems
Volt
346
400
50 Hz MOTORS
Low Voltage
Max
IkW
125
155
195
195
280
346 V
400 V
1.86
387
1210
1.88
473
1478
1.86
563
1759
1.86
563
1759
1.87
779
2435
1.62
333
1041
1.61
390
1220
1.58
451
1410
1.58
451
1410
1.61
652
2038
2. To establish electrical data for your selected voltage, if other than
listed voltage, use the following formula:
listed voltage
RLA = listed RLA x
selected voltage
50 Hz
For Use on
Supply Voltages
320 to 360 v systems
380 to 415 v systems
OLTA = listed OLTA x
listed voltage
selected voltage
LRA = listed LRA x
selected voltage
listed voltage
Example: Find the rated load amperage for a 575-v motor listed at
1.14 amps per kW input for use at 550 volts.
RLA = 1.14 x
575
= 1.19
550
*Available on Frame 1 and 2 units.
†Available on Frame 4 units.
Motor nameplates can be stamped for any voltage within the listed
supply voltage range. Chillers shall not be selected at voltages above
or below the listed supply voltage range.
AUXILIARY RATINGS (115 V, 1 Phase, 50/60 Hz)
ITEM
POWER
CONTROLS
OIL HEATER*
24 vdc
115-230/1/60
SEALED
KVA
0.16
—
AVERAGE
WATTS
160
500
*Frame 1 and 2 machines.
Compressor motor controllers
Compressor motors, controls, and accessories require the
use of starting equipment systems specifically designed for
23 Series Chillers. Refer to Carrier Engineering Requirement Z-375.
18
Capacitors/power factors
Power factor considerations may indicate use of capacitors.
Properly sized capacitors improve power factors, especially
at part load. Contact your local Carrier sales representative
for further information on power factors.
Performance data
Computerized ratings
Part-load performance
Because of the large number of available Carrier 23XL Screw
Chiller component combinations and the wide variability in
required operating conditions, it is impractical to provide
tabular performance information. Tabulated performance
ratings predict ‘‘typical’’ chiller performance. Actual chiller
performance may vary significantly at actual operating conditions and as chiller components are optimized around these
conditions.
Computerized performance ratings are available through
your local Carrier sales representative. These ratings are
custom matched to meet project-specific operating conditions and energy efficiency requirements.
Frequently, a chiller will operate at part-load for a large majority of its total operating hours. In some cases, a chiller
with better part-load performance will offer an annualized
operating cost advantage over one which performs less efficiently at lower loads.
Established by ARI, the Integrated Part-Load Value (IPLV)
is a weighted average of kW/ton values over a wide range
of chiller operation. The IPLV provides a convenient method
of comparing the part-load performance of different chillers at standardized typical conditions. The IPLV rating method
has been incorporated into the ARI Certification Program.
The 23XL Screw Chiller computerized ratings are certified
in accordance with this program.
Variables such as local weather data, building load profiles, and local utility rate structures may significantly alter
the impact of part-load performance on actual operating
cost. Any operating cost analysis should include all factors
relevant to a particular application.
ARI Certification Program
The computerized performance ratings of the Carrier 23XL
Screw Chiller are certified by the Air Conditioning and Refrigeration Institute (ARI). The Certification Program requires that the manufacturer’s ratings be regularly checked
for accuracy through a program of chiller testing in strict
compliance with ARI Standard 550. This independent verification provides assurance of chiller performance.
Application data
HEAT EXCHANGER MINIMUM/MAXIMUM FLOW RATES*
ENGLISH (gpm)
COOLER
Frame
Size
10
1
11
20
2
21
40
41
4
42
43
CONDENSER
Frame
Size
10
1
11
20
2
21
40
41
4
42
43
1 PASS
Min
Max
513
2053
645
2582
689
2758
813
3250
590
2359
666
2663
754
3016
851
3403
1 PASS
Min
Max
619
2476
729
2915
788
3151
948
3793
613
2454
692
2769
785
3141
886
3546
SI METRIC (L/s)
2 PASS
Min
Max
257
1027
323
1290
345
1379
406
1625
295
1179
333
1332
377
1508
425
1701
3 PASS
Min
Max
171
685
215
861
230
919
271
1084
197
786
222
888
251
1005
284
1134
COOLER
Frame
Size
10
1
11
20
2
21
40
41
4
42
43
2 PASS
Min
Max
310
1238
364
1457
394
1576
474
1896
307
1227
346
1384
393
1570
443
1773
3 PASS
Min
Max
206
826
243
972
263
1051
316
1265
205
818
231
923
262
1047
295
1182
CONDENSER
Frame
Size
10
1
11
20
2
21
40
41
4
42
43
1 PASS
Min
Max
32
129
41
163
43
174
51
205
37
149
42
168
47
190
54
215
1 PASS
Min
Max
39
156
46
184
50
198
60
239
38
154
43
175
50
198
55
223
2 PASS
Min
Max
16
65
20
81
22
87
25
102
18
74
21
84
24
95
27
107
3 PASS
Min
Max
11
43
13
54
14
58
17
68
12
50
14
56
16
63
18
71
2 PASS
Min
Max
19
78
23
92
25
99
30
119
19
77
22
87
25
99
28
111
3 PASS
Min
Max
13
52
15
61
16
66
20
80
13
51
14
58
16
66
18
74
*Flow rates based on standard tubes, cooler, and condenser. Minimum
flow based on tube velocity of 3 ft/sec (0.9 m/sec); maximum based on
12 ft/sec (3.6 m/sec).
19
Application data (cont)
CHILLER FOOTPRINT (FRAME 1 AND 2 CHILLERS)
DIMENSION
A
B
C
HEAT EXCHANGER SIZE
10 or 11
20 or 21
ft-in. mm ft-in. mm
4-51⁄4 1353 4-71⁄4 1403
4-41⁄2 1334 4-61⁄2 1384
1-03⁄8 314 1-13⁄8 340
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Use grout and package components to establish the level base line.
3. If chiller is set on concrete pad, electrical contractor must locate conduit stub-ups outside of pad.
Approximate location shown.
CHILLER FOOTPRINT (FRAME 4 CHILLER)
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Use grout and package components to establish the level base line.
3. If chiller is set on concrete pad, electrical contractor must locate conduit stub-ups outside of pad.
Approximate location shown.
20
STANDARD ISOLATION
VIEW B-B
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Isolation package includes 4 shear flex pads.
ACCESSORY ISOLATION
HRS — Hot Rolled Steel
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Accessory (Carrier supplied, field installed) soleplate package includes 4 soleplates, 16 jacking screws and leveling pads. Requires accessory spring vibration isolation package.
3. Jacking screws to be removed after grout has set.
4. Thickness of grout will vary depending on the amount necessary
to level chiller. Use only pre-mixed non-shrinking grout, Ceilcote
HT-648 or Master Builders 636, 08-11⁄29 (38.1) to 08-21⁄49 (57) thick.
TYPICAL ISOLATION ASSEMBLIES
(Isometric View)
21
Application data (cont)
FRAME 1 AND 2 NOZZLE ARRANGEMENTS
COOLER AND CONDENSER NOZZLE ARRANGEMENTS
NOZZLE ARRANGEMENT CODES
Cooler
Pass
1
2
3
In
1
2
3
5
7
9
Out
2
1
4
6
8
10
Code
A
B
C
D
E
F
Pass
1
2
3
In
11
12
13
15
17
19
Condenser
Out
12
11
14
16
18
20
Code
J
K
L
M
N
P
WATERBOX NOZZLE SIZES
FRAME
1
2
LEGEND
ID — Inside Diameter
22
PASS
1
2
3
1
2
3
NOMINAL PIPE SIZE (in.)
Cooler and Condenser
6
6
6
8
6
6
ACTUAL PIPE ID (in.)
Cooler and Condenser
6.065
6.065
6.065
7.981
6.065
6.065
NOTE: All nozzles are nozzle-in-head (NIH) type with 150 psig (1034 kPa) ASA
(American Standards Association) flanged connections.
FRAME 4 NOZZLE ARRANGEMENTS
COOLER AND CONDENSER NOZZLE ARRANGEMENTS
NOZZLE ARRANGEMENT CODES
Cooler
Pass
1
2
3
In
8
5
7
4
7
4
Out
5
8
9
6
6
9
Code
A
B
C
D
E
F
Pass
1
2
3
In
11
2
10
1
10
1
Condenser
Out
2
11
12
3
3
12
Code
P
Q
R
S
T
U
WATERBOX NOZZLE SIZES
FRAME
PASS
4*
1
2
3
NOMINAL PIPE
SIZE (in.)
Cooler and Condenser
10
8
6
ACTUAL PIPE
ID (in.)
Cooler and Condenser
10.020
7.981
6.065
*Frame 4 waterboxes are factory fabricated with bolt-on covers.
23
Application data (cont)
Vent and drain connections
All vents and drain connections are found in the waterbox
covers. Connection size is 3⁄4-in. FPT.
Provide high points of the chiller piping system with vents
and the low points with drains. If shut-off valves are provided in the main water pipes near the unit, a minimum
amount of system water is lost when the heat exchangers
are drained. This reduces the time required for drainage and
saves on the cost of re-treating the system water.
It is recommended that pressure gages be provided at
points of entering and leaving water to measure pressure
drop through the heat exchanger. Gages may be installed
as shown in Pressure Gage Location table shown below.
Pressure gages installed at the vent and drain connections
do not include nozzle pressure losses.
Use a reliable manometer to measure pressure differential when determining water flow. Regular gages are insensitive and do not provide accurate measurement of flow
conditions.
PRESSURE GAGE LOCATION
NUMBER
OF PASSES
1, 3
2
GAGE LOCATION
(Cooler or Condenser)
One gage in each waterbox
Two gages in waterbox with nozzles
Relief-valve discharge piping sizing should be calculated
per the current version of the ASHRAE 15, latest edition,
code using the tabulated C factors for each vessel shown
below:
VESSEL
Cooler
Condenser
Oil
Separator*
RELIEF
VALVE SIZE
(in. FPT)
3⁄4
3⁄4
1
1
3⁄4
3⁄4
11⁄4
11⁄4
VESSEL
SIZE
10, 11
20, 21
40, 41
42, 43
10, 11
20, 21
40, 41
42, 43
10, 11
20, 21
40, 41
42, 43
C FACTOR
(lb air/min)
(kg air/s)
46.6
46.6
63.8
63.8
46.6
46.6
111.8
111.8
0.35
0.35
0.48
0.48
0.35
0.35
0.84
0.84
⁄ Flare
20.3
0.15
⁄
⁄
46.6
46.6
0.35
0.35
12
34
34
*Oil separator relief valve provided with optional refrigerant isolation
package.
NOTE: Frame 1 and 2 values are for HCFC-22 refrigerant. Frame 4 values are for both HCFC-22 and HFC-134a refrigerant.
Carrier further recommends that an oxygen sensor be
installed to protect personnel. Sensor should be able to sense
the depletion or displacement of oxygen in the machine
room below 19.5% volume oxygen per ASHRAE 15, latest edition.
Design pressures
Range of application
The 23XL refrigeration machines are designed for standard
water chilling 60 Hz applications of 150 to 360 tons (530
to 1,270 kW) and 50 Hz applications of 130 to 300 tons
(460 to 1,060 kW) using refrigerant HCFC-22. The Frame
4 heat exchangers are available with HCFC-22 or
HFC-134a.
ASME stamping
All 23XL heat exchangers are constructed in accordance
with American Society of Heating, Refrigeration and Air
Conditioning Engineers (ASHRAE) 15 Safety Code for Mechanical Refrigeration (latest edition). This code, in turn,
requires conformance with American Society of Mechanical Engineers (ASME) Code for Unfired Pressure Vessels
wherever applicable.
Relief-valve discharge pipe sizing
The 23XL is equipped with 3 relief valves (1 on the cooler
and 2 on the condenser). One additional relief valve (Frame
1 and 2 chillers) or 2 relief valves (Frame 4 chillers) are provided on the oil separator when an optional refrigerant isolation package is used.
24
Design and test pressures for 23XL heat exchangers are
listed below.
DESIGN AND TEST PRESSURES
SHELL SIDE
(Refrigerant)
psi
kPa
300
2068
—
—
375
2586
PRESSURES
Design
Hydrostatic Test
Air Test
TUBE SIDE
(Water)
psi
kPa
150
1034
225
1551
—
—
HEAT EXCHANGER MATERIAL SPECIFICATIONS
ITEM
Shell
Tube Sheet
Waterbox*
Waterbox Cover†
Waterbox Shell†
Tubes
Discharge/Suction
MATERIAL
HR Steel
HR Steel
Cast Iron
HR Steel
HR Steel
Finned Copper
Steel
SPECIFICATION
ASME SA516 GR .70
ASME SA516 GR .70
ASTM A-48 Class 35
ASME SA516 GR .70
ASME SA675 GR .60
ASME SB359
ASME SA105/SA106
LEGEND
ASME — American Society of Mechanical Engineers
ASTM — American Society for Testing and Materials
HR
— Hot Rolled
*Frame 1 and 2 machines.
†Frame 4 machines.
INSULATION REQUIREMENTS
COMPONENT
Cooler
Compressor
Economizer
Economized Liquid Lines
Non-Economized Liquid Lines
FRAME
1
2
4
1, 2
4
1, 2
4
—
—
FT2
60
66
113
35
41
17
28
21
9
M2
5.57
6.13
10.49
3.25
3.81
1.58
2.60
1.95
.84
Factory insulation (optional) — Optional factory insulation is available for the evaporator shell and tube sheets,
suction pipe, motor end of compressor, economizer, and
economizer line(s). Insulation applied at the factory is 3⁄4-in.
(19.0 mm) thick and has a thermal conductivity K value of
0.28 Btu · in./hr · ft2 · °F (0.0404 W/m · °C). Insulation
conforms with UL (Underwriters’ Laboratories) Standard 94.
Classification 94HBF.
Insulation at jobsite — The optional factory insulation
package provides excellent protection against condensation
under most operating conditions. Use the relative humidity
vs dry bulb temperature graph to determine the need for
additional insulation. Plot the relative humidity vs the dry
bulb temperature. If that point falls above the evaporator
saturation temperature for your application, additional insulation is required. For saturation temperatures other than
35 F (2 C) or 45 F (7 C), use interpolation to determine
additional insulation requirements. For example, if an application has a 35 F (2 C) evaporator saturation temperature, machine room relative humidity of 80%, and dry bulb
temperature of 75 F (24 C), then additional insulation is
required.
If the machine is to be field insulated, obtain the approximate insulation areas from the Insulation Area drawing on
page 26.
Insulation of waterbox covers is made only in the field and
this information is not included in Insulation Requirements
table. When insulating the covers, allow for service access
and removal of covers.
CONDITIONS FOR ONSET OF CONDENSATION
WITH OPTIONAL INSULATION PACKAGE*
90%
80
RELATIVE HUMIDITY %
Insulation
45 F (7 C) EVAPORATOR
70
35 F (2 C) EVAPORATOR
60
50
40
70 (21)
90 (32)
85 (29)
75 (24)
80 (27)
95 (35) 100 (38)
DRY BULB TEMPERATURE IN DEGREES F (DEGREES C)
*If the optional insulation package is not used, refer to a psychrometric chart to determine the onset of condensation.
25
Application data (cont)
INSULATION AREA FOR FRAME 1 AND 2 CHILLERS
INSULATION AREA FOR FRAME 4 CHILLERS
26
FLOOR CONTACT SURFACE LOADING
HEAT EXCHANGER FRAME
1
2
4
PAD POSITION
A
B
C
D
A
B
C
D
A
B
C
D
MINIMUM
lb
kg
2970
1347
2740
1243
2270
1029
2120
961
3090
1401
3030
1374
2500
1134
2550
1156
4240
1923
4530
2054
4420
2004
4720
2141
MAXIMUM
lb
kg
3310
1501
3200
1451
2630
1193
2570
1165
3450
1565
3520
1596
2930
1329
3020
1370
5940
2694
6320
2866
6180
2803
6580
2984
FRAME 1 AND 2 CHILLERS
FRAME 4 CHILLERS
27
Controls
Microprocessor controls
Microprocessor controls provide the safety, interlock, capacity control and indications necessary to operate the chiller
in a safe and efficient manner.
Control system
The microprocessor control on each Carrier 23XL screw
chiller is factory mounted, wired, and tested to ensure chiller
protection and effective capacity control. In addition, the
program logic ensures proper starting, stopping and recycling of the chiller and provides a communication link to
the Carrier Comfort Network (CCN).
Features
Control system
Component Test and Diagnostic Check
Menu-Driven Keypad Interface for Status Display, Set Point
Control, and System Configuration
CCN Compatible
Automatic 2 Chiller Lead/Lag with Integral
Standby Controls
Primary and Secondary Status Messages
Individual Start/Stop Schedules for Local and
CCN Operation Modes
Recall of Up to 25 Alarm/Alert Messages with
Diagnostic Help
Safety cutouts
Each of these protective limits shall require manual reset
and cause an alarm message to be displayed on the LCD
screen informing the operator of the shutdown cause.
Motor High Temperature*, †
Refrigerant (Condenser) High Pressure*, †
Refrigerant (Cooler) Low Temperature*, †
Lube Oil Low Pressure
Lube Oil Sump Level
Compressor (Refrigerant) Discharge Temperature*
Under Voltage**
Over Voltage**
Cooler and Condenser Water Flow††
Motor Overcurrent†
Motor Acceleration Time
Intermittent Power Loss
Compressor Starter Fault†
Low Discharge Superheat Temperature
(Frame 1 and 2 Machines)
28
Excessive Starter Transition Time
Lack of Motor Current Signal
Motor Power Supply Phase Reversal
Temperature Sensor and Transducer Faults
Single Cycle Dropout**
Motor Miswired
Capacity control
Leaving Chilled Water Control
Entering Chilled Water Control
Soft Loading Control by Temperature or Load Ramping
Slide Valve Actuator Module
Hot Gas Bypass Valve (Optional)
Power (Demand) Limiter
Auto. Chilled Water Reset
Interlocks
Manual/Automatic Remote Start
Starting/Stopping Sequence
Pre-Flow/Post-Flow
Compressor Starter Run Interlock
Pre-Start Check of Safeties and Alerts
Low Chilled Water (Load) Recycle
Monitor/Number Compressor Starts and Run Hours
Manual Reset of Safeties
Indications
Chiller Operating Status Messages
Power-On
Pre-Start Diagnostic Check
Compressor Motor Amps
Pre-Alarm Alert
Alarm
Contact for Remote Alarm
Safety Shutdown Messages
Elapsed Time (Hours of Operation)
Chiller Input kW \
*These can be configured by user to provide alert indication at user-defined limit.
†Override protection: Causes compressor to first unload
and then, if necessary, shut down.
**Will not require manual reset or cause an alarm if autorestart after power failure is enabled.
††Required: Field or factory supplied flow switch (installed
at jobsite).
\ With optional kW transducer.
MICROPROCESSOR CONTROL CENTER
SOFTKEYS
29
Controls (cont)
CONTROL CENTER (FRONT VIEW), WITH OPTIONS
LEGEND
1 — Local Interface Device (LID)
Input/Output Interface Panel Display
2 — Processor Module (PSIO)
The PSIO is the brain of the Product
Integrated Controls
3 — Optional 8-Input Module for Spare Inputs to
Control Interface (One of Two Available)
4 — Power Transformer
5 — 6-Pack Relay Board
6 — Circuit Breakers (4)
TYPICAL LOCAL INTERFACE DEVICE (LID) DISPLAY SCREENS
Default Display — Displays information most commonly required for
chiller operating logs. Two-line system status messages inform the
operator of the operating mode or any alert or alarm messages. The
four ‘‘softkeys’’ allow access to other control functions.
30
Status Screens — The Status screens display readings of every
point monitored by the microprocessor. Cooler, condenser, and oil
pressure are included on the Status screens.
TYPICAL LOCAL INTERFACE DEVICE (LID) DISPLAY SCREENS (cont)
Schedule Screen — A user established occupancy schedule can
be easily configured for your particular application. A 365-day real
time, battery backed-up clock will automatically start and stop the
chiller according to your established schedule or the building’s master schedule in a CCN system.
Set Point Screen — The chilled water, demand limit, and ice build
set points can be entered, stored, viewed, or changed easily from
this screen.
Service Screens — The password protected service screens provide the service technician with an array of information to configure
the chiller for your particular application and troubleshoot any problems that may occur.
Alarm History File — The Alarm History file stores the last 25 alarms
or alerts that have occurred along with the time and date they occurred. It allows service technicians to quickly review alarm or alert
history to identify problems that exist, as well as the actions required
to resolve the problem.
31
Controls (cont)
TYPICAL LOCAL INTERFACE DEVICE (LID) DISPLAY SCREENS (cont)
The Control Test Screen — This screen allows access to the various control tests available to the service technician. The technician
can then quickly identify sources of problems and get the chiller back
on line.
32
The Service Configuration Screens — The Service Configuration
screen allows the service technician to configure the controls for your
particular application and set the override and alert levels for several
points monitored by the control system.
CONTROL SEQUENCE
A
— START INITIATED: Pre-start checks are made;
chilled water pump started
B
— Condenser water pump started (5 seconds
after A)
C
— Water flows verified (30 seconds to 5 minutes
maximum)
D
— Chilled water temperature checked against
control point; tower fan control enabled; slide
valve decrease timer checked to verify slide
valve position
E
— Refrigerant type verified (up to 3 minutes
after D).
F
— Compressor motor starts; phase reversal conditions monitored; compressor ontime and service ontime start; 15-minute inhibit timer starts
(10 seconds after E)
G
— Shutdown initiated: Compressor motor stops;
compressor ontime and service ontime stop;
1-minute inhibit timer on PSIO Software Version
13 and higher; slide valve decrease activated
for 1 minute
H
— Chilled water pump deenergized (30 seconds
after G); condenser pump and tower fan control
may continue to operate if condenser pressure
is high; chilled water pump may continue if in
RECYCLE mode
I
— Slide valve decrease timer expires (3 minutes
after G)
O/A — Restart permitted (both inhibit timers expired)
(minimum of 15 minutes after F; minimum of
1 minute after G)
Control sequence
To start: Push Start button — Start initiated; all safeties
are checked to see that they are satisfied (if one is not, an
indication of the fault will be displayed and the start aborted).
The signal is sent to start the chilled water pump. After
5 seconds, the signal is sent to start the condenser water
pump.
The microprocessor then puts the start on hold. It checks
if water flows are established. If not satisfied, it will continue
to monitor water flows according to the adjustable setting
(30 seconds to 5 minutes). If satisfied, it checks the chilled
water temperature against the control point, enables tower
fan control, and checks the slide valve decrease timer (to
verify that the slide valve is in the unloaded position).
If the above checks are satisfied, the microprocessor sends
the signal to start the compressor motor. It monitors the
motor acceleration time and if it is excessive, aborts the
start. If the starter fails to transition to run, the start is aborted.
Compressor ontime and service ontime start.
Once started: Phase reversal conditions are monitored to
verify proper rotation of the compressor rotors. The
microprocessor initializes the primary restart protection
(15 minutes — start to start). The slide valve opens in a soft
loading mode and is then transferred to the capacity control mode.
To stop: Push Stop button — A signal is sent to deenergize the compressor motor. Compressor ontime and service
ontime stop. The secondary restart protection (1 minute
stop-to-start) is initialized, and the slide valve decrease timer
is activated.
The microprocessor verifies that power to the compressor is off and, after 30 seconds, sends the signal to deenergize the chilled water pump. (If shutdown was caused by
the low load recycle algorithm, the chilled water pump will
continue to run.) Condenser water pump and tower fan may
continue to operate if condenser pressure is high.
Restart: Restart is permitted after the slide valve timer
and the primary and secondary start protection timers have
expired (a minimum of 15 minutes after the compressor
starts and a minimum of 1 minute after the shutdown is
initiated).
33
Typical piping and wiring
23XL CHILLER WITH FREE-STANDING STARTER
1
2
3
4
5
6
7
8
9
10
34
—
—
—
—
—
—
—
—
—
—
LEGEND
Chilled Water Pump Starter
Condenser Water Pump Starter
Cooling Tower Fan Starter
Condenser Water Pump
Chilled Water Pump
Disconnect
Freestanding Compressor Motor Starter
Compressor Motor Terminal Box
Power Panel (Hidden)
Vents
Piping
Control Wiring
Power Wiring
NOTES:
1. Wiring and piping shown are for general point-of-connection only and are not
intended to show details for a specific installation. Certified field wiring and dimensional diagrams are available on request. 23XL chillers should be installed
using certified drawings.
2. All wiring must comply with applicable codes.
3. Refer to Carrier System Design Manual for details regarding piping techniques.
4. Wiring not shown for optional devices such as:
• remote start/stop
• remote alarm
• optional safety device
• 4 to 20 mA resets
• optional remote sensors
23XL CHILLER WITH OPTIONAL UNIT-MOUNTED STARTER
1
2
3
4
5
6
7
—
—
—
—
—
—
—
LEGEND
Chilled Water Pump Starter
Condenser Water Pump Starter
Cooling Tower Fan Starter
Chilled Water Pump
Condenser Water Pump
Disconnect
Vents
Piping
Control Wiring
Power Wiring
NOTES:
1. Wiring and piping shown are for general point-of-connection only and are not
intended to show details for a specific installation. Certified field wiring and dimensional diagrams are available on request. 23XL chillers should be installed
using certified drawings.
2. All wiring must comply with applicable codes.
3. Refer to Carrier System Design Manual for details regarding piping techniques.
4. Wiring not shown for optional devices such as:
• remote start/stop
• remote alarm
• optional safety device
• 4 to 20 mA resets
• optional remote sensors
35
Typical field wiring
23XL TYPICAL FIELD WIRING WITH FREE-STANDING STARTER (FRAME 1 AND 2 CHILLERS)
IMPORTANT: Wiring shown is typical and not intended to show detail for a specific
installation. Refer to certified field wiring diagrams.
ITEM
Compressor
or Breaker
Compressor
Compressor
Compressor
Breaker
1
2
36
DESCRIPTION
Motor Starter w/o Integral Disconnect
Motor Starter w/Integral Disconnect
Motor Starter w/Integral Circuit Breaker
Motor Starter w/High Interrupt Capacity
PR1 (Chilled Water Pump)
PR2 (Condenser Water Pump)
PR3 (Cooling Tower Fan)
PR4 (Shunt Trip Output)
PR5 (Alarm Output)
Control Power Transformer (1 KVA)
Controls and Oil Heater Circuit Breaker
Starter Management Module Package
3 Phase Solid-State Motor Overload Protection
NEMA-1 Starter Enclosure
Compressor Motor Starter Branch Disconnect
Pilot Relays
(With two N.O.
Contacts Each)
See Note 3.5
ITEM
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
DESCRIPTION
Chilled Water Pump Starter Disconnect
Chilled Water Pump Motor Starter
Condenser Water Pump Starter Disconnect
Condenser Water Pump Motor Starter
Cooling Tower Fan Motor Starter Disconnect
Cooling Tower Fan Motor Starter
Chilled Water Flow Switch (N.O.). See Note 3.1
Condenser Water Flow Switch (N.O.). See Note 3.1
Spare Safety Devices (N.O.). See Note 3.1
Remote Start/Stop Device (N.O.). See Note 3.1
Remote Alarm. See Note 3.3
Remote Annunciator. See Note 3.3
Lug Adapters. See Note 2.1
6 Lead to 3 Lead Jumpers. (Not shown. See Note 4.0.)
Lead Connectors. (Not shown. See Note 4.0.)
23XL TYPICAL FIELD WIRING WITH FREE-STANDING STARTER (FRAME 1 AND 2 CHILLERS) (cont)
LL
MCM
NEMA
NFPA
N.O.
PR
RLA
T
TB
—
—
—
—
—
—
—
—
—
LEGEND
Compressor Motor Starter Terminals
Thousand Circular Mils
National Electrical Manufacturer’s Association
National Fire Protection Association
Normally Open
Pilot Relay
Rated Load Amps
Terminal
Terminal Block
Required Power Wiring
Required Control Wiring
Options Wiring
NOTES:
I. GENERAL
1.0 Starters shall be designed and manufactured in accordance
with Carrier Engineering Requirement Z-375.
1.1 All field-supplied conductors, devices, field-installation wiring, and termination of conductors and devices, must be in
compliance with all applicable codes and job specifications.
1.2 The routing of field-installed conduit and conductors and the
location of field-installed devices must not interfere with equipment access or the reading, adjusting, or servicing of any
component.
1.3 Equipment, installation, and all starting and control devices
must comply with details in equipment submittal drawings
and literature.
1.4 Contacts and switches are shown in the position they would
assume with the circuit deenergized and the chiller shut down.
1.5 WARNING — Do not use aluminum conductors.
1.6 Installer is responsible for any damage caused by improper
wiring between starter and machine.
II. POWER WIRING TO STARTER
2.0 Power conductor rating must meet minimum unit nameplate
voltage and compressor motor RLA (rated load amps).
When (3) conductors are used:
Minimum ampacity per conductor = 1.25 x compressor RLA
When (6) conductors are used:
Minimum ampacity per conductor = 0.721 x compressor RLA
2.1 Lug adapters may be required if installation conditions dictate that conductors be sized beyond the minimum ampacity
required. Contact starter supplier for lug information.
2.2 Compressor motor and controls must be grounded by using
equipment grounding lugs provided inside starter enclosure.
III. CONTROL WIRING
3.0 Field supplied control conductors to be at least 18 AWG
(American Wire Gage) or larger.
3.1 Chilled water and condenser water flow switch contacts, optional remote start device contacts and optional spare safety
device contacts, must have 24 vdc rating. Max current is
60 ma, nominal current is 10 ma. Switches with gold plated
bifurcated contacts are recommended.
3.2 Remove jumper wire between 12A and 12B before connecting auxiliary safeties between these terminals.
3.3 Pilot relays can control cooler and condenser pump and tower
fan motor contactor coil loads rated 10 amps at 115 vac up
to 3 amps at 600 vac. Control wiring required for Carrier to
start pumps and tower fan motors must be provided to assure machine protection. If primary pump and tower fan motor control is by other means, also provide a parallel means
for control by Carrier. Do not use starter control transformer
as the power source for pilot relay loads.
3.4 Do not route control wiring carrying 30 v or less within a
conduit which has wires carrying 50 v or higher or along side
wires carrying 50 v or higher.
3.5 Voltage selector switch in machine power panel is factory
set for 115 v control power source. When 230 v control power
source is used, set switch to 230 v position.
3.6 Control wiring cables between starter and power panel must
be shielded with minimum rating of 600 v, 80 C. Ground shield
at starter.
3.7 For 23XL chillers with free-standing starters, voltage to terminals LL1 and LL2 comes from a control transformer in a
starter built to Carrier specifications. Do not connect an outside source of control power to the compressor motor starter
terminals (LL1 and LL2). An outside power source will produce dangerous voltage at the line side of the starter, because supplying voltage at the transformer secondary terminals produces input level voltage at the transformer primary
terminals.
IV. POWER WIRING BETWEEN STARTER AND COMPRESSOR
MOTOR
4.0 Low voltage (600 v or less) compressor motors have (6)
1⁄2 in. terminal studs (lead connectors not supplied by
Carrier). Either 3 or 6 leads must be run between compressor motor and starter, depending on type of motor starter
employed. If only 3 leads are required, jumper motor terminals as follows: 1 to 6, 2 to 4, 3 to 5. Center to center distance between terminals is 2.73 inches. Compressor motor
starter must have nameplate stamped as conforming with
Carrier requirement ‘‘Z-375.’’
4.1 When more than one conduit is used to run conductors from
starter to compressor motor terminal box, one conductor from
each phase must be in each conduit, to prevent excessive
heating. (e.g., conductors to motor terminals 1, 2, and 3 in
one conduit, and those to 4, 5, and 6 in another.)
4.2 Compressor motor power connections can be made through
top, bottom, or right side of compressor motor terminal box
by rotating the terminal box and using holes cut by contractor to suit conduit. Flexible conduit should be used for the
last few feet to the terminal box for unit vibration isolation.
Use of stress cones or 12 conductors larger than 500 MCM
may require an oversize (special) motor terminal box (not
supplied by Carrier). Lead connections between 3-phase motors and their starters must not be insulated until Carrier personnel have checked compressor rotation.
4.3 Compressor motor frame to be grounded in accordance with
the National Electrical Code (NFPA-70) and applicable codes.
Means for grounding compressor motor is (2) Thomas and
Betts pressure connectors for 350 to 800 MCM wire, supplied and located in the back upper and lower right side corners of the compressor motor terminal box.
4.4 Do not allow motor terminals to support weight of wire cables.
Use cable supports and strain reliefs as required.
4.5 Use back up wrench when tightening lead connectors to
motor terminal studs. Torque to 10-15 lb-ft max.
37
Typical field wiring (cont)
23XL TYPICAL FIELD WIRING WITH OPTIONAL UNIT-MOUNTED STARTER (FRAME 1 AND 2 CHILLERS)
IMPORTANT: Wiring shown is typical and not intended to show the detail for a specific
installation. Refer to certified field wiring diagrams.
ITEM
1
2
38
DESCRIPTION
Benshaw Solid State w/Shunt Trip Disconnect
Benshaw Solid State w/Shunt Trip Circuit Breaker
Cutler Hammer Wye-Delta w/Shunt Trip Disconnect
Cutler Hammer Wye-Delta w/Normal Interrupt
Circuit Breaker
Cutler Hammer Wye-Delta w/Normal Interrupt
Hi Interrupt Breaker
PR1 (Chilled Water Pump)
Pilot Relays
PR2 (Condenser Water Pump)
(With Two N.O.
PR3 (Cooling Tower Fan)
Contacts Each)
PR4 (Shunt Trip Outout)
See Note 3.3
PR5 (Alarm Output)
Control Power Transformer (1 KVA)
Controls and Oil Heater Circuit Breaker
Starter Management Module Package
Phase Loss/Reversal Imbalance Protection
3-Phase Digital Ammeter
NEMA-1 Enclosure with Internal Fan Cooling
and Lockable Hinged Doors
Microprocessor-Based Overload Trip Protection
Ground Fault Protection
Compressor Motor Starter Branch Disconnect
ITEM
A
B
C
D
E
F
G
H
J
K
L
M
N
DESCRIPTION
Chilled Water Pump Starter Disconnect
Chilled Water Pump Motor Starter
Condenser Water Pump Starter Disconnect
Condenser Water Pump Motor Starter
Cooling Tower Fan Motor Starter Disconnect
Cooling Tower Fan Motor Starter
Chilled Water Flow Switch (N.O.). See Note 3.1
Condenser Water Flow Switch (N.O.). See Note 3.1
Spare Safety Devices (N.O.). See Note 3.1
Remote Start/Stop Device (N.O.). See Note 3.1
Remote Alarm. See Note 3.3
Remote Annunciator. See Note 3.3
Lug Adapters. See Note 2.1
23XL TYPICAL FIELD WIRING WITH OPTIONAL UNIT-MOUNTED STARTER (FRAME 1 AND 2 CHILLERS) (cont)
MCM
NEMA
N.O.
PR
RLA
ST
TB
—
—
—
—
—
—
—
LEGEND
Thousand Circular Mils
National Electrical Manufacturer’s Association
Normally Open
Pilot Relay
Rated Load Amps
Shunt Trip
Terminal Block
Required Power Wiring
Required Control Wiring
Options Wiring
NOTES:
I. GENERAL
1.0 Starters shall be designed and manufactured in accordance
with Carrier Engineering Requirement Z-375.
1.1 All field-supplied conductors, devices, field-installation wiring, and termination of conductors and devices must be in
compliance with all applicable codes and job specifications.
1.2 The routing of field-installed conduit and conductors and the
location of field-installed, devices must not interfere with equipment access or the reading, adjusting, or servicing of any
component.
1.3 Equipment installation and all starting and control devices
must comply with details in equipment submittal drawings
and literature.
1.4 Contacts and switches are shown in the position they would
assume with the circuit deenergized and the chiller shut down.
1.5 WARNING — Do not use aluminum conductors.
II. POWER WIRING TO STARTER
2.0 Power conductor rating must meet minimum unit nameplate
voltage and compressor motor RLA (rated load amps).
When (3) conductors are used:
Minimum ampacity per conductor = 1.25 x compressor RLA
When (6) conductors are used:
Minimum ampacity per conductor = 0.721 x compressor RLA
2.1 Lug adapters may be required if installation conditions dictate that conductors be sized beyond the minimum ampacity
required. Solid-state starters are provided with:
A. Two (2) 0-250 MCM lugs provided per phase for power
conductor terminations when compressor motor RLA is
400 amps or less.
B. Three (3), 250-500 MCM lugs provided per phase for
power conductor terminations when compressor motor
RLA is more than 400 amps.
Wye-Delta starters are provided with:
A. Two (2) 250-500 MCM lugs provided per phase for power
conductor terminators when compressor motor RLA is
420 amps or less.
B. Two (2) #1-500 MCM lugs provided per phase for power
conductor terminations when compressor motor RLA is
more than 420 amps.
2.2 Power conductors to starter must enter through top of enclosure. Flexible conduit should be used for the last few feet
to the enclosure to provide unit vibration isolation.
2.3 Compressor motor and controls must be grounded by using
equipment grounding lugs provided inside starter enclosure.
2.4 Wye-Delta starters require the assembly and the installation
of a ‘‘Top Hat’’ (located inside enclosure) to provide the required wire bending space for incoming power leads.
III. CONTROL WIRING
3.0 Field supplied control conductors to be at least 18 AWG
(American Wire Gage) or larger.
3.1 Chilled water and condenser water flow switch contacts, optional remote start device contacts, and optional spare safety
device contacts must have 24 vdc rating. Max current is
60 mA, nominal current is 10 mA. Switches with gold plated
bifurcated contacts are recommended.
3.2 Remove jumper wire between 12A and 12B before connecting auxiliary safeties between these terminals.
3.3 Pilot relays can control cooler and condenser pump and tower
fan motor contactor coil loads rated 10 amps at 115 vac up
to 3 amps at 600 vac. Control wiring required for Carrier to
start pumps and tower fan motors must be provided to assure machine protection. If primary pump and tower fan motor control is by other means, also provide a parallel means
for control by Carrier. Do not use starter control transformer
as the power source for pilot relay loads.
3.4 Do not route control wiring carrying 30 v or less within a
conduit which has wires carrying 50 v or higher or along side
wires carrying 50 v or higher.
39
Guide specifications
Packaged Hermetic Screw Liquid Chiller
Size Range: 150 to 360 Tons (530 to 1270 kW) — 60 Hz
130 to 300 Tons (460 to 1060 kW) — 50 Hz
Carrier Model Number: 23XL
Part 1 — General
1.01 SYSTEM DESCRIPTION
A. Microprocessor-controlled liquid chiller using a twin
rotor, 3550 rpm (60 Hz) or 2960 rpm (50 Hz), direct drive, semi-hermetic, screw compressor using refrigerant HCFC-22 or HFC-134a. Chillers using
CFC refrigerants such as CFC-11, CFC-12, or CFC/
HFC-500 shall not be acceptable.
If a manufacturer proposes a liquid chiller using
HCFC-123 refrigerant, then the manufacturer shall
include in the chiller price:
1. A vapor activated alarm system consisting of all
alarms, sensors, safeties, and ventilation equipment as required by ANSI/ASHRAE Standard 15
Safety Code for Mechanical Refrigeration (latest
edition) with the quotation. System shall be capable of responding to HCFC-123 levels of
10 ppm Allowable Exposure Limit (AEL).
2. External refrigerant storage tank and pumpout unit.
3. High efficiency purge unit.
4. Back-up relief valve to rupture disc.
5. Chiller pressurizing system to prevent leakage of
non-condensables into chiller during shutdown
periods.
6. Plant room ventilation.
1.02 QUALITY ASSURANCE
A. Chiller performance shall be rated in accordance with
ARI Standard 550 (latest edition).
B. Equipment and installation shall be in compliance with
ANSI/ASHRAE 15 (latest edition).
C. Cooler and condenser shall include ASME ‘‘U’’
stamp and nameplate certifying compliance with ASME
Section VIII, Division 1 code for unfired pressure
vessels.
D. Chiller shall be manufactured in a facility that has been
registered by UL to the ISO 9000 Series Standards
for quality.
E. Chiller shall be designed and constructed to meet UL
and UL of Canada requirements and shall have labels
appropriately affixed.
F. Each compressor assembly shall undergo a mechanical run-in test to check proper operation of components and to verify that vibration levels, oil pressures/
temperatures, and efficiencies are within acceptable
limits. Each compressor assembly shall be pneumatically proof tested at 405 psig (2792 kPa) and leak
tested with a tracer gas at 225 psig (1551 kPa).
G. Both cooler and condenser shall be proof tested at
375 psig (2586 kPa) on the refrigerant side and leak
tested with a refrigerant tracer gas at 300 psig
(2068 kPa). The water side of each heat exchanger
40
H.
I.
1.03
A.
B.
C.
D.
1.04
Part
2.01
A.
B.
shall be hydrostatically tested at 1.5 times rated working pressure.
The entire chiller assembly shall be leak tested with a
refrigerant tracer gas at 300 psig (2068 kPa).
Prior to shipment, the chiller automated controls shall
be tested under power to verify proper wiring and
ensure correct controls operation.
DELIVERY, STORAGE AND HANDLING
Unit shall be stored and handled in accordance with
manufacturer’s instructions.
Unit shall be shipped with all refrigerant piping and
control wiring factory installed.
Unit shall be shipped charged with either refrigerant
HCFC-22, refrigerant HFC-134a, or a nitrogen holding charge, and oil as specified on the equipment
schedule.
Unit shall be shipped with firmly attached labels that
indicate the name of the manufacturer, chiller model
number, chiller serial number, and the refrigerant used.
WARRANTY
Warranty shall include parts and labor for one year
after start-up or 18 months from shipment, whichever occurs first.
2 — Products
EQUIPMENT
General:
Factory assembled, single piece, liquid chiller shall consist of compressor, motor, lubrication system, cooler,
condenser, initial oil and refrigerant operating charges,
microprocessor control system, and documentation
required prior to start-up. An optional compressor motor starter can be mounted on the chiller, wired, and
tested by the chiller manufacturer.
Compressor:
1. One positive displacement field-serviceable helical, rotary, semi-hermetic, twin rotor-type compressor. Compressor section joints shall be sealed
using O-rings instead of gaskets to reduce the occurrence of refrigerant leakage.
2. The compressor casing shall be cast-iron with design pressure rating of 300 psig (2068 kPa) or
higher.
3. The compressor/motor shall be designed to operate at 3550 rpm (60 Hz) or 2960 rpm (50 Hz)
input speed.
4. Bearings shall be pressure lubricated rolling element type, AFBMA Class 5 or superior.
5. Capacity control shall be via a hydraulically activated slide valve located below rotating screw
rotors.
6. Discharge oil separation shall be accomplished
external to the compressor casing. Oil separator
and return system shall be designed to ensure
that oil is adequately returned to the compressor
and does not collect in the heat exchangers.
7. Compressor safeties shall include high compressor discharge temperature, high motor winding
temperature, low oil pressure, reverse rotation,
and high discharge pressure.
8. Compressor shall be equipped with internal pressure relief to protect against overpressure. For
compressors not equipped with internal pressure
relief, the high side of the chiller shall be protected with an external relief valve capable of
passing the full load flow produced by the
compressor.
9. Compressor shall be provided with a lubrication
system to deliver oil under pressure to the bearings. System shall consist of:
a. Six-micron oil filter with isolation valves to
allow filter change without removal of refrigerant charge.
b. Oil sump heater (115/230 volt, single phase,
50 or 60 Hz), if required for proper operation. Heater shall be controlled by unit microprocessor and factory wired.
c. Positive oil flow sensing/verification to occur
through a float-type oil level sensor used in
conjunction with an oil pressure sensor.
Systems that rely on a flow switch to monitor oil flow can be activated by the flow of
refrigerant vapor rather than oil and can give
an erroneous signal and are therefore
unacceptable.
10. Compressor shall be fully field serviceable. Compressors which must be removed and returned
to the factory for service shall not be acceptable.
Manufacturer shall sign, on company letterhead,
a written statement confirming the ability of the
screw compressor to be field serviced.
11. Acoustical attenuation shall be provided, as required, to achieve a maximum (full load or part
load) sound level of [
] dBA, measured per ARI
Standard 575 (latest edition). Attenuation shall
be designed to be easily removed and reinstalled.
C. Motor:
1. Compressor motors shall be of the semi-hermetic,
liquid refrigerant cooled, single speed, non-reversing,
squirrel cage induction type suitable for the voltage shown on the equipment schedule.
2. Motors’ design speed shall be 3550 rpm at 60 Hz
or 2960 rpm at 50 Hz.
3. Motors shall be suitable for operation in a refrigerant atmosphere and shall be cooled by atomized
refrigerant in contact with the motor windings.
4. Motor stator shall be arranged for service or removal with only minor compressor disassembly and
without breaking the main refrigerant piping
connections.
5. Full load operation of the motor shall not exceed
nameplate rating.
6. Low-voltage motors (600 v or less) shall be suitable for connection to wye-delta type reduced inrush or solid-state type reduced voltage starters.
7. If the mechanical contractor chooses to provide a
chiller with an open motor instead of the specified semi-hermetic motor, the contractor shall
either:
supply additional ventilation to maintain a maximum mechanical room temperature of 104 F
(40 C). Additional ventilation requirements shall
be calculated as follows:
CFM =
(Full load motor kW) (0.05) (3413)
(104−95) (1.08)
CFM = (FLkW motor) (17.6)
or, if the mechanical room is air conditioned, the
mechanical contractor shall install additional cooling equipment to dissipate the motor heat as per
the following formula:
BTUH = (FLkW motor) (0.05) (3413)
BTUH = (FLkW motor) (171)
and, alternately
TONS =
BTUH
12,000
In either case, the additional piping, valves, airhandling equipment, insulation, wiring, switchgear changes, ductwork, and coordination with
other trades shall be the responsibility of the mechanical contractor. Shop drawings reflecting any
changes to the design shall be included in the submittal and incorporated into the final as-built drawings for the project.
Also, if an open motor is provided, a mechanical
room thermostat shall be installed and set at
104 F (40 C). If this temperature is exceeded, the
chillers shall shut down and an alarm signal shall
be generated to the central Energy Management
System (EMS) display module prompting the service personnel to diagnose and repair the cause
of the over-temperature condition. The mechanical contractor shall be responsible for all changes
to the design, including coordination with temperature control, electrical, and other trades.
In addition, the electrical power consumption of
any auxiliary ventilation and/or mechanical cooling required to maintain mechanical room conditions as stated above shall be considered in the
determination of conformance to the scheduled
chiller energy efficiency requirement.
D. Cooler and Condenser:
1. Cooler and condenser shall be of shell and tube
type construction, each in separate shells. Units
shall be fabricated with high-performance tubing, steel shell and tube sheets. Waterboxes shall
be nozzle-in-head type with nozzles either flanged
or with Victaulic grooves to allow for use of
Victaulic couplings.
41
Guide specifications (cont)
2. Tubing shall be copper, high-efficiency type, with
integral internal and external enhancement. Tubes
shall be nominal 3⁄4-in. OD with standard wall
thickness of 0.025 in. measured at the root of
the fin. Tubes shall be rolled into tube sheets and
shall be individually replaceable. Tube sheet holes
shall be double grooved for joint structural integrity. Intermediate support sheet spacing shall not
exceed 36 inches.
3. Waterboxes and nozzle connections shall be designed for 150 or 300 psig (1034 or 2068 kPa)
maximum working pressure.
4. The tube sheets of the cooler and condenser shall
be bolted together to allow for field disassembly
and reassembly.
5. Cooler and condenser shall display ASME nameplates that show pressure and temperature data
and the ‘‘U’’ stamp for ASME Section VIII,
Division 1.
6. Waterboxes shall have vents, drains, and covers
to permit tube cleaning within the space shown
on the drawings. A thermistor type temperature
sensor shall be factory installed in each water
nozzle.
7. Cooler shall be designed to prevent liquid refrigerant from entering the compressor. Devices that
introduce pressure losses (such as mist eliminators) shall not be acceptable because they are subject to structural failures that can result in extensive compressor damage.
8. Tubes shall be individually replaceable from either end of the heat exchanger without affecting
the strength and durability of the tube sheet and
without causing leakage in adjacent tubes.
9. The condenser shell shall include an external thermal economizer that cools the condensed liquid
refrigerant to a reduced temperature, thereby increasing the refrigeration cycle efficiency.
10. An optional refrigerant isolation valve package
shall be factory installed to allow isolation of the
refrigerant charge in the cooler or condenser.
E. Refrigerant Flow Control:
Liquid refrigerant from the condenser shall be metered using a direct acting, float-type metering valve
to maintain the proper liquid level of refrigerant in the
heat exchangers under both full and part load operating conditions. By maintaining a liquid seal at the
flow valve, bypassed hot gas from the condenser to
the cooler (which decreases cycle efficiency) is eliminated. The float valve chamber shall have a bolted
access cover to allow field inspection, and the float
valve shall be field serviceable. Fixed orifices shall not
be acceptable.
F. Controls, Safeties, and Diagnostics:
1. Controls:
a. The chiller shall be provided with a factory
installed and wired microprocessor control
system with individually replaceable modular
component construction. Components
42
included shall be the main processor/inputoutput module, power supply, starter management module (located in the starter cabinet), relay board, temperature (thermistor) and
pressure (transducer) sensors, and all necessary auxiliary devices required for proper operation. An optional input module (8 input channels) can be factory or field installed. The control center includes a 16-line by 40-character
liquid crystal display, 4 function keys (softkeys), stop button, and alarm light. The microprocessor can be configured for either
English or SI units. Controls shall be provided with a battery backup to prevent the
loss of configuration information in case of
power failure.
The chiller control system shall have the ability to interface and communicate directly to
the building control system without the use
of additional field-installed hardware or software. Additional hardware shall be necessary
if the building control system is not part of a
Carrier Comfort Network (CCN).
The default standard display screen shall
simultaneously indicate the following
information:
• Date and time of day
• 24-character primary system status
message
• 24-character error message
• Chiller operating hours
• Entering chilled water temperature
• Leaving chilled water temperature
• Evaporator refrigerant temperature
• Entering condenser water temperature
• Leaving condenser water temperature
• Condenser refrigerant temperature
• Oil supply pressure differential
• Oil sump temperature
• Percent motor Rated Load Amps (RLA)
b.
c.
The default screen shall be displayed if there
is no manual activity at the control console
for 15 minutes. The 4 function keys shall be
software driven within the Status, Schedule,
Set Point and Service menu structures (as described in section k).
Capacity control shall be by means of a hydraulically operated slide valve under the compressor rotors. Load modulation shall be from
100% to 20% of compressor full load under
normal ARI conditions without the use of hot
gas bypass. The slide valve shall be precisely
positioned by a PID (proportional-integralderivative) control algorithm to ensure precise control (± .5 F [.3 C]) of desired chilled
water temperature without hunting or overshooting the set point.
The microprocessor control system shall automatically control the chilled water pump and
condenser water pump.
d.
e.
f.
g.
h.
i.
Upon request to start the compressor, the control system shall start the chilled water pump,
condenser water pumps, and tower fans, if
appropriate, and verify that flows have been
established. The controller shall then compare the entering/leaving chilled water temperature with the chilled water set point. If
the chilled water temperature is less than the
chilled water set point plus a specified deadband, the control system will shut down the
condenser water pump and tower fans and
wait for the cooling load to be established.
A user-configurable ramp loading rate, effective during the chilled water temperature pulldown period, shall control the rate of slide
valve opening to prevent a rapid increase in
compressor power consumption. The controls shall allow configuration of the ramp
loading rate in either degrees/minute of chilled
water temperature pulldown or percent motor amps/minute. During the ramp loading
period, a message shall be displayed informing the operator that the chiller is operating
in ramp loading mode.
The chiller controls shall be supplied as standard with a two chiller lead/lag and a third
chiller standby system. The control system
shall automatically start and stop a lag or second chiller on a two chiller system. If one of
the two chillers on line goes into fault mode,
the third or standby chiller shall be controlled
as a lag chiller. The two chiller lead/lag system shall allow manual rotation of the lead
chiller and a staggered restart of the chillers
after a power failure. Sequencing shall be
based on leaving or entering chiller water
temperature.
The control system shall include compressor
runtime timers to protect the motor from rapid
cycling (a 15-minute minimum start-to-start
timer and a 1-minute minimum stop-to-start
timer). In addition, the compressor will be inhibited from restarting if more than 8 manual
starts within a 12-hour period have occurred.
The control system shall automatically shut
down the compressor to minimize energy usage whenever the leaving chilled water temperature is 5 F (3 C) below the desired chilled
water set point or the chilled water temperature is below its set point and the chilled water temperature difference is less than a specified value. The chilled water pump will remain on, and when the leaving chilled water
temperature rises above the set point by a
user-configured amount, the compressor shall
automatically restart. During the shutdown period, a message shall be displayed informing
the operator a recycle restart is pending.
The control center shall monitor line voltage,
and if loss of voltage, high or low line voltage, or single cycle dropout is sensed, the
chiller shall shut down. Upon restoration of
j.
k.
line voltage, if the auto-restart after power
failure algorithm is enabled, the chiller shall
automatically resume the mode of operation
prior to shutdown.
The control system shall allow configuration
of reset of the chilled water temperature set
point based on any one of the following
criteria:
• Chilled water reset based on water temperature rise across the evaporator.
• Chilled water reset based on an external
4-20 mA signal.
• Chilled water reset based on a remote temperature sensor (such as outdoor air).
When reset is active, a message shall be displayed indicating the type of reset in effect.
The control center shall limit amp draw of
the compressor to the rated load amps (RLA)
or to a lower value (ranging from 40% to
100%) of compressor RLA. The control center shall allow configuration of demand limit
based on either a user input or an external
4-20 mA signal. When demand limit is active, a message shall be displayed indicating
the source of the demand signal.
STATUS FUNCTION
In addition to the default screen, status screens
shall be accessible to view the status of every
point monitored by the control center
including:
• Evaporator pressure
• Condenser pressure
• Compressor discharge temperature
• Motor winding temperature
• Number of compressor starts
• Control point settings
• Discrete output status of various devices
• Compressor motor starter status
• Optional spare input channels (16
maximum)
SCHEDULE FUNCTION
The chiller controls shall be configurable for
manual or automatic start-up and shutdown.
In automatic operation mode, the controls
shall be capable of automatically starting and
stopping the chiller according to a stored user
programmable occupancy schedule. The controls shall include built-in provisions for accepting a minimum of three, 365-day occupancy schedules, (the local time schedule shall
be Schedule 01, the ice build time schedule
shall be Schedule 02, and the CCN default
schedule shall be 03). Each schedule shall allow a minimum of 8 separate occupied, unoccupied periods. All of the 8 occupied periods can be scheduled by individual day for
any day of the week. A separate schedule shall
be provided for holidays. Schedules shall allow specifications of Daylight Savings start/
end and up to 18 user-defined holidays up to
43
Guide specifications (cont)
one year in advance (month, day, and duration of days). Display of the occupancy schedules shall be viewable on the LCD screen.
Each schedule shall provide a means of configuring an occupancy time override to permit a ‘‘one time extension’’ of an occupied
period on the configured day. The controls
shall also provide for chiller start-up and shutdown through a remote contact closure from
a customer supplied device or from a building management system software command.
SETPOINT FUNCTION
The controls shall provide the capability to
view and change the leaving chilled water set
point, entering chilled water set point, demand limit set point, or ice build set point at
any time during chiller operation or shutdown periods. The controls shall allow for the
specification of capability control through either leaving chilled water or entering chilled
water.
SERVICE FUNCTION
The controls shall provide a password protected service function which allows authorized individuals to:
• View the alarm history file which contains
the last 25 alarm/alert messages with time
and date stamp. These messages shall be
displayed in text form, not in codes.
• Execute the chiller Control Test function
for quick identification of malfunctioning
components
• View, modify, and/or configure systems
and controls options, capacity and safety
override limits and parameters.
• View/modify chiller occupancy periods
• View/modify schedule holiday periods
• View/modify schedule override periods
• View/modify system time and date
• Specify a network address
• Change units display on the LID
2. Safeties:
a. Unit shall automatically shut down when any
of the following conditions occurs (Each of
these protective limits shall require manual
reset and cause an alarm message to be displayed on the LCD screen informing the operator of the shutdown cause.):
1) Motor overcurrent
2) Over voltage*
3) Under voltage*
4) Single cycle dropout*
5) Low evaporator refrigerant temperature
6) High condenser pressure
7) High motor temperature
8) High compressor discharge temperature
9) Low oil pressure
10) Low oil level
11) Loss of cooler water flow
12) Loss of condenser water flow
44
b.
13) Starter fault
14) High oil filter differential pressure
15) Low discharge superheat temperature
(Frame 1 and 2 chillers)
16) Out-of-range sensors
17) Excessive starter transition time
18) Motor current signal loss
19) Motor power supply phase reversal
20) Temperature sensor and transducer faults
21) Single cycle dropout
22) Motor running in reverse (miswired)
23) Motor
running
without
control
authorization
*Will not require manual reset or cause an
alarm if auto-restart after power failure is
enabled.
The control system shall detect conditions that
approach protective limits and shall take selfcorrective action prior to an alarm occurring.
The system shall automatically reduce chiller
capacity when any of the following are out
of normal operating range:
• High condenser pressure
• High motor temperature
• Low evaporator refrigerant temperature
• High motor amps
During the capacity override period, a prealarm (alert) message shall be displayed informing the operator which condition is causing the capacity override. Once the condition
is again within acceptable limits, the override
condition shall terminate and the chiller shall
revert to normal chilled water control. If during either condition the protective limit is
reached, the chiller will shut down, an alarm
shall be generated, and a text message will
be displayed informing the operator which
condition caused the shutdown and alarm.
3. Diagnostics and Service:
a. The control system shall execute a series of
pre-start checks whenever a start command
is received to determine if pressures, temperatures, and timers are within pre-start limits, thereby allowing start-up to proceed. If
any of the limits are exceeded, a text alert
message will be displayed informing the operator of the cause of the pre-start alert.
b. A self-diagnostic control test shall be an integral part of the control system to allow quick
identification of abnormal system conditions
and malfunctioning chiller components. Once
the controls test has been initiated, all pressure and temperature sensors shall be checked
to ensure they are within their normal operating range. A pump test shall automatically
energize the chilled water and condenser water pumps. The control system shall confirm
that water flows have been established and
require operator confirmation prior to proceeding to the next test.
c.
A slide valve test shall energize the increase
and decrease slide valve solenoids to check
for proper operation. The controls shall request manual operation confirmation of proper
solenoid operation before proceeding to the
next test.
d. In addition to a comprehensive automated
Control Test, the controls shall provide a
manual option that permits selection and testing of individual control components and inputs. A thermistor test and transducer test
shall display the actual reading of each transducer and each thermistor installed on the
chiller on the LCD screen.
e. All sensors shall have quick disconnects to
allow replacement of the sensor without replacement of the entire sensor wire. Pressure
transducers shall be capable of field calibration to ensure accurate readings and to avoid
unnecessary transducer replacement. Transducers shall be serviceable without the need
for refrigerant charge removal or isolation.
4. Building Control System Interface:
The chiller control system shall have the ability to
interface and communicate directly to the building control system without the use of additional
field installed hardware and software. If different
building control and chiller suppliers are chosen,
the chiller shall be supplied with a dataport module which shall translate the information in the
chiller microprocessor to an ASCII stream of data
which can be read by any manufacturer’s building
management control system.
G. Low Voltage Unit Mounted Starter:
An optional reduced voltage wye-delta or solid-state
starter shall be supplied. The compressor motor-starter
shall be factory mounted, wired, and tested prior to
shipment by the chiller manufacturer. Customer electrical connection for compressor motor power shall
be limited to main starter power connection only.
Solid-state starter shall provide stepless compressor
motor accelerating and limit motor inrush current to
100-600% of compressor motor RLA. The starter
shall include 6 silicon control rectifiers (SCR) with
integrally-mounted bypass contactors to provide SCR
bypass once the motor has achieved full voltage and
speed. The starter shall also include automatic acceleration kick circuitry which monitors motor current
to sense when the inrush current subsides and automatically ramps voltage up at a faster rate to eliminate the instability that occurs at the breakaway torque
point. Starter shall be UL and CSA approved and shall
include:
• NEMA 1 enclosure with integral fan cooling and
lockable hinged doors
• 1 KVA control/oil heater transformer with branch
circuit breaker
• 5 pilot relays for control of chilled water pump, condenser water pump, tower fan, customer remote
alarm, shunt trip, and main power disconnect. The
shunt trip shall be energized by the SMM (Starter
Management Module) during unauthorized operation (such as loss of communication between the
SMM and PSIO [Processor Sensor Input/Output
Module]).
• Microprocessor based overload trip protection
• Phase loss/reversal/imbalance protection
• Ground fault protection
• Three-phase digital ammeter
• Main power disconnect (non-fused type) with shunt
trip.
Solid-state starters also include the following standard
features:
• Normal interrupt capacity main circuit breaker with
shunt trip
• Phase loss/reversal/imbalance protection
• Integral SCR bypass contactors
• Three-phase digital voltmeter
• Three-phase over/under voltage protection
• Digital power factor display
• Digital frequency display
• Event history file to store last 99 events (start,stop
fault)
H. Electrical Requirements:
1. Electrical contractor shall supply and install main
electrical power line, disconnect switches, circuit
breakers, electrical protection devices per local code
requirements and as indicated necessary by the
chiller manufacturer.
2. Electrical contractor shall wire the water flow switches
to the chiller control circuit to ensure that chiller
will not operate until flows are established and
maintained.
3. Electrical contractor shall wire the chilled water
pump, condenser water pump, and tower fan control circuit to the chiller control circuit.
4. Electrical contractor shall supply and install electrical wiring and devices required to interface the
chiller controls with the building control system, if
applicable.
5. Electrical power shall be supplied to the unit at the
voltage, phase, and frequency listed in the equipment schedule.
I. Piping Requirements — Instrumentation and Safeties:
1. Mechanical contractor shall supply and install pressure gages in readily accessible locations in piping
adjacent to the chiller such that they can be easily
read from a standing position on the floor. Gages
shall be Marsh Master or equal with 41⁄2-in. nominal diameter face. Scale range shall be such that
design values shall be indicated at approximately
mid-scale.
Gages shall be installed in the entering and leaving water lines of the cooler and condenser.
2. Mechanical contractor shall supply and install flow
detection devices in chilled water and condenser
water piping. Switches shall make contact when
flow is established. Flow switches shall be installed
in horizontal runs at least 5 pipe diameters downstream from any bend or tee.
45
Guide specifications (cont)
J. Insulation:
1. Chilled water piping and cooler waterboxes shall
be insulated by the mechanical contractor.
2. Factory installed insulation shall be available for
the chiller. Additional insulation shall be installed
at the jobsite by the mechanical contractor.
3. Chiller insulation shall be 3⁄4-in. thick and shall have
a thermal conductivity not exceeding 0.28 Btu •
in./hr • sq ft • F and shall conform to UL Standard 94, Classification 94 HBF.
K. Vibration Isolation:
Chiller manufacturer shall furnish neoprene isolator
pads for mounting equipment on a level concrete
surface.
L. Start-Up:
1. The chiller manufacturer shall provide a factorytrained representative, employed by the chiller
manufacturer, to perform the start-up procedures
as outlined in the start-up, operation, and
maintenance manual provided by the chiller
manufacturer.
2. After the above services have been performed, the
same factory-trained representative shall be available for a period of classroom instruction (not to
exceed 4 hours) to instruct the chiller owner’s personnel in the proper operation and maintenance
of the chiller.
3. Manufacturer shall supply the following literature:
a. Start-Up, Operation, and Maintenance
Instructions.
b. Installation Instructions.
c. Field Wiring Diagrams.
d. One complete set of certified drawings.
M. Optional Field Installed Accessories:
The following standard accessories are available for
field installation:
1. Soleplate Package
2. Spring Isolators
46
3.
4.
5.
6.
7.
8.
9.
10.
11.
Spare Sensor Package
Control Options Module Upgrade Kit
Stand-Alone Pumpout Unit
Separate Storage Tank and Pumpout Unit
Flow Switch, Differential Pressure Type
Sound Insulation Kit
Refrigerant Isolation Package
Automatic Hot Gas Bypass
Low Voltage Unit-Mounted Starter (Wye-Delta,
Solid State)
12. Low Voltage Remote Motor Starter (Wye-Delta,
Solid State)
13. Field Mounting Kit for Unit-Mounted Starters
N. Factory Installed Options:
1. Thermal Insulation
2. Automatic Hot Gas Bypass
3. Control Options Module
4. Cooler/Condenser Tubing Options
5. Cooler and Condenser Passes
6. Nozzle-In-Head Waterboxes, 300 psig (2067 kPa)
(Select Sizes)
7. Marine Waterboxes, 300 psig (2067 kPa) (select
sizes)
8. Refrigerant Isolation Package
9. Factory Performance Test
10. Low Voltage Unit-Mounted Starter (Wye-Delta,
Solid State)
11. Export Crating
12. Factory Charged Unit
Carrier Corporation • Syracuse, New York 13221
11-96
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
Tab 5e
Page 48
Catalog No. 522-304
Printed in U.S.A.
PC 211
Form 23XL-3PD
Replaces: 23XL-2PD