Carrier 30XW325-400 User Manual

Page 1
Product Data
a30-4659.eps
AQUAFORCE
®
30XW325-400
Water-Cooled Liquid Screw
Chillers
325 to 400 Nominal Tons
(1133 to 1354 kW)
®
Carrier's AquaForce 30XW chillers provide a great combination of perfor­mance and compact footprint for cooling and heat recovery applica­tions. These chillers provide excellent reliability and efficiency at true operat­ing conditions without compromising the environment.
• Chlorine-free R-134a HFC refrigerant
• Positive displacement, twin screw compressors
• AHRI (Air Conditioning, Heating, and Refrigeration Institute) certified efficiencies to 0.468 kW per ton IPLV (integrated part load value)
• Dual independent refrigerant circuits
• Compact footprint, less than 48 in. (1219 mm) wide
• Easy to use controls

Features/Benefits

Quality design and construction make the AquaForce 30XW chillers an excellent choice for modern, efficient chilled water plants.
Small footprint
The 30XW chillers feature a compact footprint and are delivered as a single complete package less than 48 in. (1219 mm) wide for easy installation and minimal indoor space. The 30XW chiller footprints may be up to 30% smaller when compared to other chill­ers and may require less mechanical room floor space and smaller concrete pads.
Copyright 2009 Carrier Corporation Form 30XW-2PD
Page 2
Features/Benefits (cont)
Easy installation
The AquaForce® 30XW screw chillers are shipped with starter and unit mounted flow switch installed and can be shipped with a full R-134a refriger­ant charge to minimize installation time. The unit provides single point power connection (using optional con­trol power transformer) and quick, easy piping connections (using Victaulic­type clamp on couplings). The 30XW 200-v, 230-v, 460-v, and 575-v units are designed in accordance with UL (Underwriters Laboratory) and UL Canada (Underwriters Laboratory, Canada) standards to minimize electri­cal inspection time.
Dual circuits
Dual independent refrigerant circuits provide reliable, dependable cooling, excellent part load operation, and redundancy. Each circuit includes its own compressor, electronic expansion valve, filter drier, and sight glass to assure operation.
High efficiency
The Aquaforce 30XW screw chiller efficiency levels meet or exceed energy efficiency requirements of ASHRAE (American Society of Heating, Ventila­tion and Air Conditioning Engineers)
90.1 2007 and CSA (Canadian Stan­dards Association) for both full load and part load operation and is certified to AHRI standards.
Per AHRI 550/590, chillers operate at design conditions less than one percent of the time. As a result, superior part load efficiency is required for today's chilled water applications. The 30XW chillers deliver integrated part-load
values (IPLV) as low as 0.468 kW per ton at AHRI conditions while offering the ability to operate in a broad range of applications and climates. This exceptional performance has a signifi­cant impact on energy savings and cost of ownership.
Heat recovery
The Aquaforce 30XW screw chiller provides up to 140 F (60 C) leaving condenser water (requires 300 psig [2068 kPa] condenser option) when applied in heat recovery applications. Further, the 30XW unit heat control mode can be utilized to maintain a con­stant leaving condenser water tempera­ture. Low source controls provide evaporator suction protection to pre­vent nuisance trips when operating in heat recovery applications. This flexi­ble capability allows a chiller to meet both cooling and heating requirements providing a high level of interchange­ability within a chilled water plant.
Environmental leadership
Carrier has long been committed to the environment and its sustainability. The Aquaforce 30XW screw chiller pro­vides customers with a high-efficiency, chlorine free, long-term solution unaf­fected by refrigerant phase outs. Carrier's decision to utilize non-ozone depleting R-134a refrigerant provides customers with a safe and environmen­tally sound choice without compromis­ing efficiency. In addition, R-134a refrigerant was given an A1 safety rat­ing by ASHRAE, meaning that it is among the safest refrigerants available.

Table of contents

Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14
Selection Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-18
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19,20
Typical Control Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-24
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-28
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-32
Positive displacement screw compression
Positive displacement compression ensures stable operation under all load conditions without the possibility of compressor surge. High-efficiency rotary twin screw compressors with infinitely variable slide valves allow the chillers to exactly match actual load conditions, delivering excellent part load performance.
Factory testing
A quick start-up is assured once instal­lation is complete, since each 30XW unit is manufactured at an ISO (Interna­tional Organization for Standardiza­tion) 9001:2000 listed manufacturing facility to ensure quality. In addition, all 30XW units that are shipped with a full charge of R-134a refrigerant are tested under load at the factory to provide reliable start-up.
Low starting current (inrush)
Dual circuit units stage the start up of the compressors thereby reducing the over all current draw by up to 40%.
Constant or variable evapora­tor flow
Aquaforce 30XW screw chillers are suitable for constant or variable evapo­rator flow.
Hermetic motor
The Aquaforce 30XW chiller utilizes motors that are hermetically sealed from the machine room. Refrigerant is used to cool the motor windings.
Carrier's hermetic design eliminates:
• Compressor shaft seals that require maintenance and increase the likeli­hood of refrigerant leaks.
• Machine room cooling requirements associated with air-cooled motors, which dissipate heat to the mechan­ical room.
• High noise levels common with air­cooled motors, which radiate noise to the machine room and adjacent areas.
• Shaft alignment problems that occur with open-drive designs during start­up and operation, when equipment temperature variations cause ther­mal expansion.
Positive pressure design
Positive pressure designs eliminate the need for costly low pressure contain­ment devices, reducing the initial cost
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of the system. The AquaForce® 30XW chiller's positive pressure design ensures that air, moisture and other performance degrading contaminants are not sucked inside the chiller. Purge units and their associated maintenance are no longer necessary.
Refrigerant isolation valves
The refrigerant isolation valves enable service personnel to store the refriger­ant charge in the evaporator or con­denser during servicing. These valves also allow the refrigerant to be stored inside the chiller during shipment from the factory minimizing start-up time. During servicing, the in-chiller storage reduces refrigerant loss and eliminates time-consuming transfer procedures. As a self-contained unit, the AquaForce 30XW chiller does not require addi­tional remote storage systems.
Optional suction service valves
The optional suction service valves allow for further isolation of the com­pressor from the evaporator vessel.
Marine container shipment
The compact design allows for con­tainer shipment to export destinations, ensuring quality while reducing ship­ping cost.
Heat exchangers
The Aquaforce 30XW chillers utilize mechanically cleanable shell and tube evaporators and condensers available with a complete line of waterbox options to meet project specific requirements. One, two, and three pass arrangements are available to meet a wide variety of flow conditions. Nozzle in head and marine waterboxes are available to meet 150 psig (1034 kPa) and 300 psig (2068 kPa) piping requirements.
Heat exchanger features include:
ASME certified construction
An independent agency certifies the design, manufacture, and testing of all heat exchangers to American Society of Mechanical Engineers (ASME) stan­dards, ensuring heat exchanger safety, reliability and long life. The ASME U-stamp is applied to the refrigerant side of the evaporator and condenser and is applied to the water side of these heat exchangers when 300 psig (2068 kPa) marine waterboxes are provided.
Electronic thermal-dispersion flow switch
An electronic thermal-dispersion flow switch switch is included with the evap­orator. The switch is factory installed and tested and contains no moving parts for high reliability.
High performance tubing
Carrier's AquaForce chillers utilize advances in heat transfer technology providing compact, high-efficiency heat exchangers. Tubing with advanced internally and externally enhanced geometry improves chiller performance by reducing overall resis­tance to heat transfer while reducing fouling.
Evaporator tube expansion
Evaporator tube expansion at center support sheets prevents unwanted tube movement and vibration, thereby reducing the possibility of premature tube failure. Tube wall thickness is greater at the expansion location, sup­port sheets, and end tube sheets, to provide maximum strength and long tube life.
Closely spaced intermediate sup­port sheets
Support sheets prevent tube sagging and vibration, thereby increasing heat exchanger life.
Refrigerant filter isolation valves
These valves allow filter replacement without pumping down the chiller, reducing service time and expense.
Microprocessor controls
The AquaForce 30XW screw chiller controls communicate in easy to under­stand English, making it as easy as pos­sible to monitor and control each chiller while maintaining fluid tempera­tures. Controls are available with French, Portuguese and Spanish as standard configuration options. These controls result in higher chiller reliabil­ity, simplified training and correspond­ingly lower operational and maintenance costs.
Two user interface options are avail­able, the Touch Pilot™ display and the Navigator™ module.
The Touch Pilot display is an easy to use touch screen display that provides simple navigation for configuration and control of the 30XW units.
Carrier's exclusive handheld Naviga­tor display provides convenience and powerful information in the palm of your hand. The Navigator display helps technicians to quickly diagnose prob­lems and even prevent them from occurring.
All 30XW units are ready to be used with Carrier Comfort Network devices.
Controls features include:
Automatic capacity override
This function unloads the compressor whenever key safety limits are approached, increasing unit life.
Chilled liquid reset
Reset can be accomplished manually or automatically from the building man­agement system. For a given capacity, reset allows operation at slower com­pressor speeds, saving energy when warmer chilled liquid can be used.
Demand limiting
This feature limits the power draw of the chiller during peak loading condi­tions. When incorporated into the CCN building automation system, a red line command holds chillers at their present capacity and prevents any other chillers from starting. If a load shed signal is received, the compres­sors are unloaded to avoid demand charges whenever possible.
Ramp loading
Ramp loading ensures smooth pull­down of liquid loop temperature and prevents a rapid increase in compres­sor power consumption during the pulldown period.
Automated controls test
The test can be executed prior to start­up to verify that the entire control sys­tem is functioning properly.
365-day real time clock
This feature allows the operator to pro­gram a yearly schedule for each week, weekends, and holidays.
Occupancy schedules
Schedules can be programmed into the controller to ensure that the chiller operates when cooling is required and remains off when not needed by the tenants or process.
®
(CCN)
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Features/Benefits (cont)
Extensive service menu
Unauthorized access to the service menu can be password-protected. Built-in diagnostic capabilities assist in troubleshooting and recommend proper corrective action for pre-set alarms, resulting in greater up time.
TOUCH PILOT™ DISPLAY
Alarm file
This file maintains the last 50 time and date-stamped alarm and alert messages in memory. This function reduces trou­bleshooting time and cost.
a30-4456
SMOOTH ROTARY COMPRESSOR
Comfort
Link
Configuration data backup
Non-volatile memory provides protec­tion during power failures and eliminates time consuming control reconfiguration.
30-562
TWIN-SCREW DESIGN
MODE
Alarm Status
Run Status
Service Test
Temperatures
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
ESC
Operating Modes
Alarms
ENTER
a30-3924
OPTIONAL NAVIGATOR™ DISPLAY
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Model number nomenclature

30XW – 325 6 – – – 4 – 3 B
30XW – AquaForce® Water-Cooled
Screw Chiller
Design Series
Unit Size (Nominal Tons) (kW)
325 – 325 (1133) 350 – 350 (1206)
400 – 400 (1354)
Voltage 1 – 575-3-60 2 – 380-3-60 4 – 230-3-60 6 – 460-3-60 7 – 200-3-60
Condenser Options
- – 2 Pass, NIH, 150 psig (1034 kPa), Victaulic, Discharge Connections (Std) 0 – 2 Pass, NIH, 150 psig (1034 kPa), Victaulic, Suction Connections 1 – 2 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Connections 2 – 2 Pass, NIH, 150 psig (1034 kPa), Flange, Suction Connections
3 – 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Discharge Connections
4 – 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Suction Connections 5 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Connections 6 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, 7 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Discharge Connections 8 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Suction Connections 9 – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Discharge Connections B – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Suction Connections C – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Connections D – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Su F – 2 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Connections G – 2 Pass, MWB, 300 psig (2068 kPa), Flange, Suction Connections H – 1 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Leaving J – 1 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Leaving K – 1 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Leaving L – 1 Pass, MWB, 300 ps
Heat Machine
- – Std Condenser/Comfort Cooling (Std) M – Heat Machine Condenser/Comfort Cooling
Evaporator Options
- – 2 Pass, NIH, 150 psig (1034 kPa), Victaulic, Discharge Connections (Std) 0 – 2 P ass, NIH, 150 psig (1034 kPa), Victaulic, Suction Connections 1 – 2 P ass, NIH, 150 psig (1034 kPa), Flange, Discharge Connections 2 – 2 Pass, NIH, 150 psig (1034 kPa), Flange, Suction Connections
– 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Discharge Connections
3
4 – 2 Pass, NIH, 300 psig (2068 kPa), Victaulic, Suction Connections 5 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Connections 6 – 2 Pass, NIH, 300 psig (2068 kPa), Flange, Suction Connections 7 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Discharge Connections 8 – 2 Pass, MWB, 150 psig (1034 kPa), Victaulic, Su 9 – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Discharge Connections B – 2 Pass, MWB, 300 psig (2068 kPa), Victaulic, Suction Connections C – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Connections D – 2 Pass, MWB, 150 psig (1034 kPa), Flange, Suction Connections F – 2 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Connections G – 2 Pass, MWB, 300 psig (2068 kPa), Fl
– 1 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Leaving
H J – 1 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Leaving K – 1 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Leaving L – 1 Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Leaving M – 3 Pass, NIH, 150 psig (1034 kPa), Flange, Discharge Leaving N – 3 Pass, NIH, 150 psig (1034 kPa), Flange, Suction Leaving P – 3 Pass, NIH, 300 psig (2068 kPa), Flange, Discharge Leaving Q – 3 Pass, NIH, 300 psig (2068 kPa), Flange, Suction Leaving R – 3 Pass, MWB, 150 psig (1034 kPa), Flange, Discharge Leaving
S 3 Pass, MWB, 150 psig (1034 kPa), Flange, Suction Leaving
Pass, MWB, 300 psig (2068 kPa), Flange, Discharge Leaving
T – 3 V – 3 Pass, MWB, 300 psig (2068 kPa), Flange, Suction Leaving
ig (2068 kPa), Flange, Discharge Leaving
Suction Connections
ction Connections
ction Connections
ange, Suction Connections
LEGEND
CPT — Control Power Transformer MWB — Marine Waterbox EMM — Energy Management Module NIH Nozzle-In-Head GFCI — Ground Fault Circuit Interrupter XL — Across-the-Line Start LON — Local Operating Network
*Evaporator insulation is standard.
Packaging/Charging Options B – R-134a Refrigerant with Bag (Std) C – R-134a Refrigerant with Crate Over Bag D – Nitrogen Refrigerant with Bag F – Nitrogen Refrigerant with Crate Over Bag
Controls/Communications Options
- – Navigator™ Displa
0 – Navigator Dis pla y, EMM 1 – Navigator Dis pla y, GFCI Service Option 2 – Navigator Dis pla y, EMM, GFCI Service Option
3 – Touch Pilot™ Display (Std)
4 – Touch Pilot, EMM 5 – Touch Pilot, GFCI S ervice Option 6 – Touch Pilot, EMM, GFCI S ervice Option 7 – Navigator Dis pla y, BACnet™ Translator 8 – Navigator Dis pla y, EMM, BACnet Tra nslator 9 – Navigator Dis pl
BACnet Translator
B – Navigator Display, EMM, GFCI Service Option,
BACnet Translator
C – Touch Pilot Display (Std), BACnet Translator D – Touch Pilot Display, EMM, BACnet Translator F – Touch Pilot Display, GFCI Service Option,
BACnet Translator
G – Touch Pilot Display, EMM, GFCI Service Option,
BACnet Translator
H – Navigator Dis J – Navigator Display, EMM, LON Trans lator K – Navigator Display, GFCI Service Option,
LON Translator
L – Navigator Display, EMM, GFCI Service Option,
LON Translator
M – Touch Pilot Display (Std), LON Translator N – Touch Pilot Display, EMM, LON Translator P – Touch Pilot Display, GFCI
LON Translator
Q – Touch Pilot Display, EMM, GFCI Service
Option, LON Translator
Electrical Options
- – Single Point, XL Starter, Terminal Block
(Std 380, 460, 575-v)
0 Single Point, Wye-Delta Sta rter, Terminal
Block (Std 200,230-v)
3 – Dual Point, XL Starter, Terminal Block
4 – Dual Point, Wye-Delta S tarter, Terminal Block 7 – Single Point, XL S tarter, Non-Fused Disconnect 8 – Single Point, Wye-Delta, Non-Fus C – Dual Point, XL Starter, Non-Fused Disconnect D – Dual Point, Wye-Delta Starter, Non-Fused
Disconnect
H – Single Point, XL Starter, Terminal Block, CPT J – Single Point, Wye-Delta S tarter, Terminal
Block, CPT
M – Dual Point, XL Starter, Terminal Block, CPT N – Dual Point, Wye-Delta Starter, Terminal
Block, CPT
R Single Point, XL Starter, Non-Fused
Disconnect, CPT
S Single Point, Wye-Delta, Non-Fused
Disconnect, CPT
– Dual Point, XL Starter, Non-Fused
W
Disconnect, CPT
X – Dual Point, Wye-Delta Starter, Non-Fused
Disconnect, CPT
Refrigeration Circuit Options 4 – Sta nda rd Unit 6 – With Suction Service Valves D – With Minimum Load Control G – With Suction Service Valves and Minimum
Load Control
N – With Condenser Insulation for Heat Machine Q – With Suction Service Valves and Condenser
Insulation for Heat Machine
X – With Minimum Load Control and Condenser
Insulation for Heat Machine
Z – With Suction Service Va
Control and Condenser Insulation for Heat Machine
y
ay, GFCI Service Option,
play, LON Translator
Service Option,
ed Disconnect
*
lves, Minimum Load
a30-4744
Quality Assurance
Certified to ISO 9001:2000
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Capacity ratings

30XW
UNIT SIZE
325 322 1132.5 204.8 773 48.8 15.6 46.5 967 61.0 10.9 32.5 0.636 0.468 350 343 1206.3 215.7 824 52.0 17.5 52.2 1029 64.9 12.3 36.7 0.629 0.471 400 385 1354.0 242.8 924 58.3 21.5 64.1 1155 72.9 15.2 45.3 0.631 0.474
AHRI — Air Conditioning, Heating and Refrigeration Institute IPLV — Integrated Part Load Value
NOTES:
1. Certified in accordance with AHRI Standard 550/590 at standard rating conditions.
2. Standard rating conditions are as follows: Evaporator Conditions:
Condenser Conditions:
CAPACITY
Ton s
Leaving Water Temperature: 44 F (6.7 C) Flow: 2.4 gpm per ton (0.043 L/s per kW)
Entering Water Temperature: 85 F (29.4 C) Flow: 3.0 gpm per ton (0.054 L/s per kW)
Output
(kW)
LEGEND
INPUT
POWE R
(kW)
EVAPORATOR
FLOW
gpm L/s
EVAPORATOR
PRESSURE DROP
Ft of
Wate r
kPa gpm L/s
3. IPLV is a single number part-load efficiency value calculated from
4. Contact Carrier for custom ratings.
5. Data shown for standard chiller with 2 pass, nozzle-in-head (NIH)
CONDENSER
FLOW
Fouling Factor (Evaporator):
0.00010 hr x sq ft x F per Btuh (0.000018 m
Fouling Factor (Condenser):
0.00025 hr x sq ft x F per Btuh (0.000044 m2 x K per W)
the system full-load efficiency values and corrected for a typical building air-conditioning application.
waterboxes.
CONDENSER
PRESSURE DROP
Ft of
Water
kPa
FULL LOAD
EFFICIENCY
(kW/Ton)
2
x K per W)
IPLV
(kW/Ton)
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Physical data

30XW325-400 UNIT PHYSICAL DATA — ENGLISH
30XW UNIT SIZE 325 350 400 NOMINAL CAPACITY (tons) 325 350 400 UNIT WEIGHT (lb) (Operating/Shipping) 14,319/13,163 14,515/13,369 14,759/13,489 COMPRESSORS Semi-hermetic, twin screw
Compressor Speed (rpm) 3500 Compressor Model Number (qty) 06TU483 (2) 06TU554 (2) Unloading Type Slide Valve
Minimum Step Capacity % (standard) 15% Optional % 10%
Economizer No Yes
Temperature Relief Valve Connection (in. SAE Flare) (each circuit) —3/8
REFRIGERANT HFC, R-134a
Charge (lb) Circuit A 260 270 Charge (lb) Circuit B 260 270
OIL POE, SW-220
Charge (gal.) Circuit A 4 Charge (gal.) Circuit B 4
EVAPORATOR
Net Fluid Volume (gal.) 76.0 Maximum Refrigerant Pressure (psig) 220 Maximum Water Side Pressure (psig)
Standard 150 Optional 300
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional) 6 1-Pass NIH Victaulic (optional) 8 2-Pass NIH or MWB Flange (optional) 6 2-Pass NIH Victaulic (standard) 8 2-Pass MWB Victaulic (optional) 6 3-Pass NIH or MWB Flange (optional) 6 3-Pass NIH Victaulic (optional) 8
Drain (in. NPT)
Relief Valve Connection (in. NPTF)
Quantity Per Circuit 1 Relief Valve Setting (psig) 220 Flow Rate (lb air/min) 31.7
CONDENSER
Net Fluid Volume (gal.) 82.6 Maximum Refrigerant Pressure (psig)
Standard Condenser 220 Heat Machine 300
Maximum Water Side Pressure (psig)
Standard 150 Optional 300 Heat Machine 300
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional) 6 1-Pass NIH Victaulic (optional) 8 2-Pass NIH or MWB Flange (optional) 6 2-Pass NIH Victaulic (standard) 8 2-Pass MWB Victaulic (optional) 6
Drain (in. NPT)
Relief Valve Connection (in. NPTF) (Standard/Heat Machine)
Quantity Per Circuit 2/2 Relief Valve Setting (psig) 220/300 Flow Rate (lb air/min) 31.7/46.6
Temperature Relief Valve Connection (in. SAE Flare)
Discharge Line (Qty per Circuit) 1 Liquid Line (Qty per Circuit) 1
CHASSIS DIMENSIONS (ft-in.)
Length 13 - 3 Width 3 - 11 3/ Height 6 - 6 11/
LEGEND
HFC — Hydrofluorocarbon MWB — Marine Waterbox NIH — Nozzle-In-Head NPTF — National Pipe Thread Female POE — Polyolester SAE — Society of Automotive Engineers
3
/4 / 3/
3
/
8
3
/
4
3
/
8
4
1
/
4
3
/
4 8
16
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Physical data (cont)
30XW325-400 UNIT PHYSICAL DATA — SI
30XW UNIT SIZE 325 350 400 NOMINAL CAPACITY (kW) 1133 1206 1354 UNIT WEIGHT (kg) (Operating/Shipping) 6495/5971 6584/6064 6695/6119 COMPRESSORS Semi-hermetic, twin screw
Compressor Speed (r/s) 58.3 Compressor Model Number (qty) 06TU483 (2) 06TU554 (2) Unloading Type Slide Valve
Minimum Step Capacity % (standard) 15% Optional % 10%
Economizer No Yes
Temperature Relief Valve Connection (in. SAE Flare) (each circuit)
REFRIGERANT HFC, R-134a
Charge (kg) Circuit A 117.9 122.5 Charge (kg) Circuit B 117.9 122.5
OIL POE, SW-220
Charge (L) Circuit A 15.1 Charge (L) Circuit B 15.1
EVAPORATOR
Net Fluid Volume (L) 287.7 Maximum Refrigerant Pressure (kPa) 1517 Maximum Water Side Pressure (kPa)
Standard 1034 Optional 2068
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional) 6 1-Pass NIH Victaulic (optional) 8 2-Pass NIH or MWB Flange (optional) 6 2-Pass NIH Victaulic (standard) 8 2-Pass MWB Victaulic (optional) 6 3-Pass NIH or MWB Flange (optional) 6 3-Pass NIH Victaulic (optional) 8
Drain (in. NPT)
Relief Valve Connection (in. NPTF)
Quantity Per Circuit 1 Relief Valve Setting (kpa) 1517 Flow Rate (kg air/min) 14.38
3
/
8
3
/
4
CONDENSER
Net Fluid Volume (L) 312.7 Maximum Refrigerant Pressure (kPa)
Standard Condenser 1517 Heat Machine 2068
Maximum Water Side Pressure (kPa)
Standard 1034 Optional 2068 Heat Machine 2068
Water Connections
Inlet and Outlet (in.)
1-Pass NIH or MWB Flange (optional) 6 1-Pass NIH Victaulic (optional) 8 2-Pass NIH or MWB Flange (optional) 6 2-Pass NIH Victaulic (standard) 8 2-Pass MWB Victaulic (optional) 6
Drain (in. NPT)
Relief Valve Connection (in. NPTF) (Standard/Heat Machine)
Quantity Per Circuit 2/2 Relief Valve Setting (kpa) 1517/2068 Flow Rate (kg air/min) 14.38/21.1
Temperature Relief Valve Connection (in. SAE Flare)
Discharge Line (Qty per Circuit) 1 Liquid Line (Qty per Circuit) 1
3
/4 / 3/
3
/
8
1
/
4
CHASSIS DIMENSIONS (mm)
Length 4057.7 Width 1203.3 Height 1998.7
LEGEND
HFC — Hydrofluorocarbon MWB — Marine Waterbox NIH — Nozzle-In-Head NPTF — National Pipe Thread Female POE — Polyolester SAE — Society of Automotive Engineers
3
/
8
4
8
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Options and accessories

ITEM
Controls Options Navigator Hand-Held Display XX Remote Enhanced Display X BACnet Translator Control XX LON Translator Control XX Energy Management Module XX Evaporator Options One-Pass Evaporator Head X Three-Pass Evaporator Head X Marine Waterboxes X Flanged Connections X Suction Service Valve X 300 psig (2068 kPa) Operating Pressure X Condenser Options Heat Machine Condenser X One-Pass Condenser Head X Marine Waterboxes X Flanged Connections X 300 psig (2068 kPa) Operating Pressure X Starter Options Wye-Delta Starter X Dual Point Power X Non-Fused Disconnect X Control Transformer X 115-v GFCI Convenience Outlet X Unit Options Minimum Load Control X Temperature Reset Sensor X Nitrogen Charge X Crate for Shipment X Vibration Pads X Vibration Isolation Springs X
FACTORY-
INSTALLED
OPTION
FIELD-
INSTALLED
ACCESSORY
Factory-installed options
Navigator™ module provides a portable, hand-held dis-
play for convenient access to unit status, operation, config­uration and troubleshooting diagnostics capability. The four-line, 20-character LCD (liquid crystal display) display provides clear language information in English, French, Spanish, or Portuguese. The Navigator module features an industrial grade extension chord and magnets located on the back of the weatherproof enclosure to allow attach­ment to sheet metal components for hands free operation.
BACnet™ translator control provides an interface between the chiller and BACnet Local Area Network (LAN, i.e., MS/TP EIA 485). The BACnet translator con­trol is also available as a field-installed option.
LON translator control provides an interface between the chiller and Local Operating Network (LON, i.e., LON­Works FT-10A ANSI/EIA-709.1). The LON translator control is also available as a field-installed option.
Energy management module provides energy manage­ment capabilities to minimize chiller energy consumption. Several features are provided with this module including leaving fluid temperature reset, cooling set point reset or demand limit control from a 4 to 20 mA signal, 2-point demand limit control (from 0 to 100%) activated by a remote contact closure, and discrete input for "Ice Done" indication for ice stage system interface.
The 300 psig (2068 kPa) evaporator operating pressure option allows operation for water-side pressure
up to 300 psig (2068 kPa).
The 300 psig (2068 kPa) condenser operating pressure option allows operation for water-side pressure
up to 300 psig (2068 kPa). Minimum load control allows additional capacity reduc-
tion for unit operation below the minimum step of unload­ing via hot gas bypass.
Marine waterboxes provide water piping connections extending from the side of the waterbox (as opposed to extending from the end of the waterbox). This option also includes a removable bolt on waterbox cover allowing access to the heat exchanger tubes without breaking the existing field piping. This option is available for both the evaporator and condenser.
a30-4684.eps
Flanged connection option provides an ANSI (Ameri­can National Standards Institute) flange on the end of the chiller water piping for connection to a customer supplied mating flange in the field piping. This option is available for both the evaporator and condenser.
a30-4685
One-pass evaporator provides a lower pressure drop through the evaporator for applications with low delta T (temperature) or high flow or where the evaporators are piped in a series or side stream arrangement. One-pass evaporator is only available with flanged connections and with discharge end leaving water connection.
Three-pass evaporator provides a greater efficiency for brine applications and in applications with a high delta T and low flow. Three-pass evaporator is only available with flanged connections.
Heat machine condenser allows operation with up to 140 F (60 C) leaving condenser water temperature (see E-CAT for selections). In addition, this option provides factory-installed thermal insulation on the condenser, condenser flow switch and leaving condenser water
9
Page 10
Options and accessories (cont)
temperature sensor to facilitate operating in HEAT mode. Heat machine units require 300 psig (2068 kPa) option and field-installed thermal insulation on the compressor discharge piping and waterbox heads because of high temperature.
One-pass condenser provides a lower pressure drop through the condenser for applications with low delta T (temperature) or high flow or where the condensers are piped in a series. The one-pass condenser option is only available with flanged connections and with a discharge end leaving water connection.
Wye-delta start is an alternate starting method which reduces the inrush current when starting the compressor. Wye delta start is standard on 208-v, and 230-v units, optional for 380-v, 460-v, and 575-v.
Dual point power provides a means for connecting two sources of power to dual compressor 30XW chillers. One source of power is wired to operate the compressor on the A circuit and one source of power is wired to operate the compressor on the B circuit of the chiller.
Non-fused disconnect provides a no load, lockable, through the door handle disconnect for unit power on the chiller. On dual point power, one disconnect is provided for each of the two main power supplies. This disconnect does not remove the control circuit from power supply.
Control transformer is sized to supply the needs of the control circuit from the main power supply.
115-v GFCI convenience outlet includes 4 amp GFI (ground fault interrupt) receptacle. Convenience outlet is 115-v female receptacle. Not available with 380-v units.
Nitrogen charge provides a 15 lb (6.8 kg) charge of nitrogen instead of a full factory charge of R-134a refrig­erant to keep the chiller refrigerant circuit dry during ship­ment. This option is recommended for applications where the unit will be disassembled prior to installation. Units shipped with a nitrogen charge will receive an electrical continuity test at the factory prior to shipment.
Crate for shipment provides a wooden crate around the chiller. The chiller is bagged prior to being placed in the crate. This option is recommended for export orders.
Suction service valves allow for further isolation of the compressor from the evaporator vessel.
Field-installed accessories
Remote enhanced display is a remotely mounted
indoor 40-character per line, 16-line display panel for unit monitoring and diagnostics.
BACnet™ translator control provides an interface between the chiller and BACnet Local Area Network (LAN, i.e., MS/TP EIA 485). The BACnet translator con­trol is also available as a factory-installed option.
LON translator control provides an interface between the chiller and Local Operating Network (LON, i.e., LON­Works FT-10A ANSI/EIA-709.1). The LON translator control is also available as a factory-installed option.
Energy management module provides energy manage­ment capabilities to minimize chiller energy consumption. Several features are provided with this module including leaving fluid temperature reset, cooling set point reset or demand limit control from a 4 to 20 mA signal, 2-point demand limit control (from 0 to 100%) activated by a remote contact closure, and discrete input for "Ice Done" indication for ice stage system interface.
Temperature reset sensor provides temperature reset capability from either the occupied space or outdoor tem­perature sensor.
NOTE: Temperature reset capability using return tempera­ture is standard.
Vibration isolation pads are neoprene pads for installa­tion under the chiller feet at the jobsite.
Vibration springs provide a set of non-siesmic spring isolators for installation at the jobsite.
Navigator™ module provides a portable, hand-held dis­play for convenient access to unit status, operation, config­uration and troubleshooting diagnostics capability. The four-line, 20-character LCD (liquid crystal display) display provides clear language information in English, French, Spanish, or Portuguese. The Navigator module features an industrial grade extension chord and magnets located on the back of the weatherproof enclosure to allow attach­ment to sheet metal components for hands free operation.
Field-supplied and field-installed insulation
Evaporator waterbox insulation must be field installed.
When insulating waterboxes, allow for service access and removal of covers. To estimate waterbox cover areas, refer to the following figure.
Insulation for discharge piping between the compres­sor and condenser must be field installed on heat machine units. Refer to the following figure.
Condenser waterbox insulation must be field installed on heat machine units. When insulating waterboxes, allow for service access and removal of covers. To estimate waterbox cover areas, refer to the following figure.
10
Page 11
FIELD-SUPPLIED AND FIELD-INSTALLED INSULATION
EVAPORATOR WATERBOX INSULATION NEEDED
CONDENSER WATERBOX INSULATION NEEDED (HEAT MACHINE UNITS ONLY)
DISCHARGE PIPING INSULATION NEEDED (HEAT MACHINE UNITS ONLY)
EVAPORATOR WATERBOX INSULATION NEEDED
EVAPORATOR WATERBOX INSULATION NEEDED
CONDENSER WATERBOX INSULATION NEEDED (HEAT MACHINE UNITS ONLY)
NOTES:
1. Field-installed insulation for standard units shown in light gray.
2. Field-installed insulation for heat machine units shown in dark gray.
3. Back of the unit shown.
a30-4686
11
Page 12

Dimensions

a30-4745
SEE NIH EVAPORATOR DETAIL FOR NOZZLE MEASUREMENTS
SUCTION END
30XW UNIT DIMENSIONS
EVAPORATOR
DISCHARGE END
SEE NIH CONDENSER DETAIL FOR NOZZLE MEASUREMENTS
MLV (OPTIONAL)
CONDENSER
STANDARD 30XW UNIT DIMENSIONS
30XW UNIT
SIZE
OPERATING
WEIGHT, lb [kg]
325 14,319 [6495] 3734 [1694] 3828 [1736] 3337 [1514] 3420 [1551] 6- 350 14,515 [6584] 3785 [1717] 3880 [1760] 3383 [1535] 3467 [1573] 6- 400 14,759 [6695] 3848 [1745] 3946 [1790] 3439 [1560] 3526 [1599] 6-
NOTES:
1. Weights shown for standard chiller (2 pass with NIH, victaulic waterboxes).
2. See page 14 for unit mounting locations.
MOUNTING LOCATION WEIGHT, lb [kg] DIMENSIONS (ft-in. [mm]) 1234ABC
3
/8 [1837] 6-3/8 [1837]3/8 [9.53]
3
/8 [1837] 6-3/8 [1837]3/8 [9.53]
3
/8 [1837] 6-3/8 [1837]3/8 [9.53]
30XW UNIT AND WATERBOX DIMENSIONS
CONNECTIONS PASSES
WATERBOX
(EVAP/COND)
NIH/NIH
NIH/MWB
Same Ends
MWB/NIH
MWB/MWB
2 Pass
NIH/NIH
NIH/MWB
MWB/NIH
Opposite Ends
MWB/MWB
NIH/NIH Flange 14-5
1 or
3 Pass
NIH/MWB Flange MWB/NIH Flange 15,244 [6915] 15,440 [6894] 15,684 [7114]
MWB/MWB Flange 15,581 [7067] 15,777 [7063] 16,021 [7267]
NOTES:
1. Operating weight includes weight of water, refrigerent, and oil.
2. Denotes center of gravity.
3. Dimensions shown in ft-in. [mm] unless noted.
4. The recommended service clearance around the machine is 3 ft [914.4 mm].
5. Victaulic nozzles are standard on all units. A flow switch can be factory-installed in evaporator inlet victaulic nozzle.
6. Maximum fluid side pressure of condenser or evaporator is 150 psig [1034 kPa] (standard) or 300 psig [2068 kPa] (optional).
7. Operating weight includes weight of water, refrigerant, and oil.
NOZZLE
TYPE
Victaulic 13-3
Flange 13-9
D
ft-in. [mm]
3
/4 [4057]
1
/16 [4193] 14,651 [6646] 14,847 [6646] 15,091 [6845]
E
ft-in. [mm]Fft-in. [mm]
Victaulic
Flange 14,739 [6685] 14,935 [6685] 15,179 [6885]
Victaulic 14,489 [6572] 14,685 [6572] 14,929 [6772]
Flange 14,746 [6689] 14,768 [6689] 15,012 [6809]
13-11
5
/8 [4258]
3
/8 [1210] 6-611/16 [1999]
3-11
Victaulic 14,668 [6653] 14,864 [6653] 15,108 [6853]
Flange 14,834 [6729] 15,030 [6729] 15,274 [6928]
Victaulic 13-6
Flange 14-4
Victaulic 14-2
Flange 14-6
Victaulic 14-2
Flange 14-8
Victaulic
Flange 14,834 [6729] 15,030 [6729] 15,274 [6928]
5
/16 [4123]
7
/16 [4380] 14,651 [6646] 14,847 [6646] 15,091 [6845]
3
/16 [4323] 14,498 [6576] 14,694 [6576] 14,938 [6776]
15
/16 [4443] 14,739 [6685] 14,935 [6685] 15,179 [6885]
13
/16 [4339] 14,489 [6572] 14,685 [6572] 14,929 [6772]
3
/16 [4475] 14,746 [6689] 14,768 [6689] 15,012 [6809]
11
/16 [4539]
14-10
5
/8 [4410] 14,828 [6726] 15,024 [6726] 15,268 [6925]
11
/16 [4539]
14-10
3
/8 [1210] 6-611/16 [1999]
3-11
MLV (OPTIONAL)
LEGEND
MLV — Minimum Load Valve MWB — Marine Waterbox NIH — Nozzle-In-Head SSV — Suction Ser vice Valve
MAX UNIT OPERATING WEIGHT lb [kg] 325 350 400
14,319 [6495] 14,515 [6495] 14,759 [6695]
14,498 [6576] 14,694 [6576] 14,938 [6776]
14,319 [6495] 14,515 [6495] 14,759 [6695]
14,668 [6653] 14,864 [6653] 15,108 [6853]
15,223 [6905] 14,768 [6896] 15,012 [6809]
12
Page 13
INCOMING CONTROL
POWER 1 x 7/8”
KNOCKOUT
DOOR CLEARANCE SPACE
EVAP
SUCTION
END
a30-4755
3 3/16”
[81 mm]
SUCTION
END
30XW UNIT DIMENSIONS (cont)
DOOR CLEARANCE SPACE
D
INCOMING CONTROL
POWER 1 x 7/8”
KNOCKOUT
DISCHARGE
END
a30-4748
a30-4747
END
DISCHARGE
13
Page 14
Dimensions (cont)
30XW UNIT DIMENSIONS (cont)
WATERBOX FLANGE DETAIL
NIH EVAPORATOR
DISCHARGE DISCHARGEDISCHARGE
a30-4725
a30-4751
MOUNTING
LOCATIONS
NIH CONDENSER
DISCHARGE
a30-4688
a30-4749
DISCHARGE
SUCTION SUCTIONSUCTION
UNIT
30XW325-400
NUMBER OF
PASSESAin. (mm)Bin. (mm)
26
10 (0)0 (0)68
36
a30-4752
DISCHARGE DISCHARGEDISCHARGE
SUCTION SUCTIONSUCTION
UNIT
30XW325-400
NUMBER OF
PASSESAin. (mm)Bin. (mm)
27
1 0 (0) 0 (0) 6
37
CONNECTION SIZE
1
/16 (154) 61/16 (154) 6 8
1
/16 (154) 61/16 (154) 6 8
Flange Victaulic
MARINE EVAPORATOR
CONNECTION SIZE
1
/2 (191) 71/2 (191) 6 6
1
/2 (191) 71/2 (191) 6
Flange Victaulic
UNIT
30XW325-400
a30-4750
UNIT
30XW325-400
SUCTION
NUMBER OF
PASSESAin. (mm)Bin. (mm)
26
1 0 (0) 0 (0) 6 8
3
/4 (171) 63/4 (171) 6 8
SUCTION
CONNECTION SIZE
Flange Victaulic
MARINE CONDENSER
DISCHARGE DISCHARGE
SUCTION SUCTION
NUMBER OF
PASSESAin. (mm)Bin. (mm)
27
1 0 (0) 0 (0) 6
3
/8 (187) 73/8 (187) 6 6
CONNECTION SIZE
Flange Victaulic
14
Page 15

Selection procedure

Carrier’s packaged selection program provides quick, easy selection of Carrier’s water-cooled chillers. The pro­gram considers specific temperature, fluid and flow requirements among other factors such as fouling and alti­tude corrections.
Before selecting a chiller, consider the following points:
Leaving water (fluid) temperature (LWT)
• The LWT must be at least 40 F (4.4 C) or greater.
• If the LWT requirement is greater than 60 F (15.5 C), a mixing loop is required.
Entering water (fluid) temperature (EWT)
• If the EWT requirement is greater than 70 F (21.1 C), a mixing loop is required. The EWT should not exceed 70 F (21.1 C) for extended operation. Pulldown can be accomplished from 95 F (35 C).
Evaporator flow rate or evaporator delta-T:
• The evaporator delta-T (EWT – LWT) must fall between 5 and 20° F (2.8 and 11.1° C) while still meeting the maximum entering requirements.
• For larger or smaller delta-T applications, a mixing loop is required. If the evaporator flow is variable, the rate of change of flow should not exceed 10% per minute. The loop volume in circulation must equal or exceed 3 gallons per nominal ton (3.2 L per kW) of cooling for temperature stability and accuracy in normal air condi­tioning applications. In process cooling applications, there should be 6 to 10 gallons per ton (6.5 to 10.8 L per kW). To achieve this loop volume, it is often neces­sary to install a tank in the loop. The tank should be baf­fled to ensure there is no stratification, and that water (or brine) entering the tank is adequately mixed with liq­uid in the tank. See Water Loop Volume in the Applica­tion Data section.
Evaporator pressure drop:
• A high evaporator pressure drop can be expected when the evaporator delta-T is low. A mixing loop can help to alleviate this situation.
• The three-pass evaporator option is recommended to increase performance when the evaporator delta T is high. This is particularly helpful with brine applications.
Condenser pressure drop:
• A high condenser pressure drop can be expected when the condenser delta-T is low. A one-pass condenser can help lower pressure drop.
Series chillers:
• One-pass heat exchangers can help lower pressure drop when heat exchangers are placed in series.
Water quality, fouling factor:
• Poor water quality can increase the required evaporator fouling factor.
• Higher than standard fouling factors lead to lower capacity and higher input kW from a given chiller size compared to running the same application with better water quality (and lower fouling factors).
Temperature reset:
• Return water (standard)
• Outside air temperature (standard)
• Space temperature (accessory sensor required)
• 4 to 20 mA (requires an energy management module)
Demand limit:
• 2-step (requires an energy management module)
• 4 to 20 mA (requires an energy management module)
• CCN Loadshed

Performance data

EVAPORATOR AND CONDENSER FLOW RATES
EVAPORATOR CONDENSER NOMINAL
Leaving Fluid/Entering Fluid
Minimum Maximum
30XW UNIT
Two pass 411 25.9 1481 93.4 494 31.1 1974 124.5 790 49.8 987 62.3
325
One pass 790 49.8 3126 197.2 987 62.3 3290 207.6 790 49.8 987 62.3
Three pass 247 15.6 987 62.3 790 49.8
Two pass 433 27.3 1557 98.2 519 32.7 2076 131.0 830 52.4 1038 65.5
350
One pass 830 52.4 3287 207.4 1038 65.5 3460 218.3 830 52.4 1038 65.5
Three pass 260 16.4 1038 65.5 830 52.4
Two pass 486 30.7 1751 110.4 584 36.8 2334 147.3 934 58.9 1167 73.6
400
One pass 934 58.9 3696 233.1 1167 73.6 3890 245.4 934 58.9 1167 73.6
Three pass 292 18.4 1167 73.6 934 58.9
*Maximum condenser fluid temperature shown for standard condensing option. Heat machine option may have leaving fluid temperatures up to 140 F (60 C).
40 F (4.4 C)/ 45 F (7.2 C)
Minimum
Flow Rate
GPM L/s GPM L/s GPM L/s GPM L/s GPM L/s GPM L/s
60 F (15.6 C)/
70 F (21.1 C)
Maximum
Flow Rate
Minimum Entering
65 F (18.3 C) 118 F (47.8 C)*
Fluid
Minimum
Flow Rate
Maximum Leaving
Fluid
Maximum
Flow Rate
Evaporator Condenser
Nominal
Flow Rate
Nominal
Flow Rate
15
Page 16
Performance data (cont)
30XW325-400 EVAPORATOR MARINE WATERBOX
(kPa)
(119.4)
(104.4)
(89.5)
(74.6)
(59.7)
(44.8)
ft wg
40.00
35.00
30.00
25.00
20.00
15.00
3
pass
pass
pass
2
1
Pressure Drop
(29.8)
(14.9)
(0)
10.00
5.00
0.00
0 500 1000 1500 2000 2500 3000
(0) (31.5) (63.1) (94.6) (126.2) (157.7) (189.3)
Evaporator Flow Rate
NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented.
A30-4691
gpm (L/s)
30XW325-400 EVAPORATOR NIH FLANGE
(0)
ft wg
40.00
1 pass
35.00
pass
3
pass
2
30.00
25.00
20.00
15.00
10.00
5.00
0.00
0 500 1000 1500 2000
(0) (31.5) (63.1) (94.6) (126.2)
Evaporator Flow Rate
gpm (L/s)
A30-4692
(kPa)
(119.4)
(104.4)
(89.5)
(74.6)
(59.7)
(44.8)
Pressure Drop
(29.8)
(14.9)
LEGEND
NIH — Nozzle-In-Head
NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented.
16
Page 17
(kPa)
p
30XW325-400 EVAPORATOR NIH VICTAULIC
ft wg
(119.4)
(104.4)
(89.5)
(74.6)
(59.7)
(44.8)
40.00
35.00
30.00
25.00
20.00
15.00
pass
3
pass
pass
2
1
Pressure Drop
(29.8)
(14.9)
LEGEND
NIH — Nozzle-In-Head
NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented.
(0)
10.00
5.00
0.00 0 500 1000 1500 2000 2500 3000
(0) (31.5) (63.1) (94.6) (126.2) (157.7) (189.3)
Evaporator Flow Rate
gpm (L/s)
A30-4693
30XW325-400 CONDENSER MARINE WATERBOX
2 pass
1
ass
gpm (L/s)
(0)
ft wg
40.00
35.00
30.00
25.00
20.00
15.00
10.00
5.00
0.00
(kPa)
(119.4)
(104.4)
(89.5)
(74.6)
(59.7)
(44.8)
Pressure Drop
(29.8)
(14.9)
0 500 1000 1500 2000 2500 3000 3500
(0) (31.5) (63.1) (94.6) (126.2) (157.7) (189.3) (220.8)
Condenser Flow Rate
NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the entire range of condenser water flow rates represented.
A30-4694
17
Page 18
Performance data (cont)
30XW325-400 CONDENSER NIH FLANGE
(kPa)
ft wg
(119.4)
(104.4)
(89.5)
(74.6)
(59.7)
(44.8)
40.00
35.00
30.00
25.00
20.00
15.00
2 pass
1 pass
Pressure Drop
(0)
LEGEND
10.00
5.00
0.00 0 500 1000 1500 2000 2500 (0) (31.5) (63.1) (94.6) (126.2) (157.7)
Condenser Flow Rate
gpm (L/s)
A30-4695
(29.8)
(14.9)
NIH — Nozzle-In-Head
NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented.
30XW325-400 CONDENSER NIH VICTAULIC
(kPa)
(119.4)
(104.4)
(89.5)
(74.6)
(59.7)
(44.8)
Pressure Drop
(29.8)
(14.9)
LEGEND
NIH — Nozzle-In-Head
NOTE: The table above represents pressure drops only. The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented.
(0)
ft wg
40.00
35.00
2 pass
1 pass
30.00
25.00
20.00
15.00
10.00
5.00
0.00 0 500 1000 1500 2000 2500 3000 3500
(0) (31.5) (63.1) (94.6) (126.2) (157.7) (189.3) (220.8)
Condenser Flow Rate
gpm (L/s)
A30-4696
18
Page 19

Controls

Microprocessor
The chiller microprocessor controls overall unit operation and controls a number of processes simultaneously. These processes include internal timers, reading inputs, analog to digital conversions, display control, diagnostic control, out­put relay control, demand limit, capacity control, head pressure control, and temperature reset. Some processes are updated almost continuously, others every 2 to 3 sec­onds, and some every 30 seconds. The microprocessor routine is started by switching the emergency ON-OFF switch to the ON position.
Control sequence
Pre-start — After control switches on, the prestart takes
place. The microprocessor checks itself, and if configured, energizes the evaporator and condenser pumps to the internal (or CCN) time schedule (or input occupied signal from an external system) and waits for temperature to stabilize.
Start-up — The chiller will receive a call for cooling when chilled fluid temperature increases above the set point plus a dead band, or if an override start command is received. If flow has been proven, the first compressor starts 1 to 3 minutes after the call for cooling. The controlled pulldown feature limits compressor loading on start up to reduce demand on start up and unnecessary compressor usage.
Capacity control — On the first call for cooling, the microprocessor starts the compressor on the lead circuit. The microprocessor maintains leaving fluid temperature set point through intelligent positioning of the slide valve. As the load increases above the compressor's capacity, the compressor on the lag circuit is started and both compres­sors are staged together.
Maintaining set point — The control monitors entering and leaving chilled water temperature to anticipate changes in cooling load. The speed at which capacity is added or reduced is controlled by temperature deviation from set point and rate of temperature change of the chilled fluid. The basic logic for determining when to add or remove capacity is a time band integration of deviation from set point plus rate of change of leaving fluid tempera­ture. When leaving-fluid temperature is close to the set point and slowly moving closer, logic prevents additional capacity. Accuracy depends on loop volume, loop flow rate, load and condenser water temperatures.
Return fluid temperature compensation — No adjust­ment for cooling range or evaporator flow rate is required because the control automatically compensates for cooling range by measuring both return fluid temperature and leav­ing fluid temperature.
Low temperature override — This feature prevents LWT (leaving water temperature) from overshooting the set point to prevent nuisance low suction temperature trips.
High temperature override — This feature allows the chiller to add capacity quickly during rapid load variations.
Temperature reset (chilled water reset) — When latent loads in the conditioned space are reduced, it may be possible to reset the leaving chilled water temperature set
point to a warmer temperature thereby reducing compres­sor power usage and saving energy. Three reset options are offered. With any chilled water reset application, hu­midity control should be considered since higher coil tem­peratures will reduce latent capacity. For details on apply­ing a reset option, refer to the Controls, Start-Up, Opera­tion, Service and Troubleshooting guide.
Return fluid temperature reset — This feature increases LWT set point as return (entering) fluid tempera­ture decreases (indicating load decrease). This option may be used where return fluid temperature provides accurate load indication. No additional hardware is required.
Outdoor-air temperature reset — This feature increases LWT set point as outdoor ambient temperatures decreases (indicating load decrease). This reset should only be applied where outdoor ambient temperature is an indi­cation of load. A field-installed thermistor is required.
Space temperature reset — This feature increases the LWT as space temperature decreases (indicating load decrease). This reset should only be applied where space temperature is an indication of load. A field-supplied ther­mistor is required.
Minimum load control — The main base board (MBB) responds to the supply chilled water temperature to match cooling load requirements and controls the minimum load control valve. The minimum load control valve allows hot gas to pass directly into the evaporator circuit permitting the unit to operate at lower loads with less compressor cycling. Minimum load control should be given consider­ation when operation is anticipated below the minimum unloading step.
Pull down control — If pulldown control has been selected (adjustable setting), no additional capacity is added as long as the difference between fluid temperature and the set point is greater than 4 F (2.2 C) and rate of change in leaving water temperature is greater than the 90 seconds since the last capacity change, compressors will continue to run unless a safety device trips. This prevents rapid cycling and also helps return oil during short operating periods.
Maximum operating pressure control — If the enter­ing fluid temperature is 95 F (35 C) and the saturated suc­tion temperature is 50 F (10 C) or higher, the maximum operating pressure (MOP) feature limits the suction to keep the chiller online. The control automatically starts the chiller in the unloaded state to eliminate the potential of compressor overload due to high head pressure or low suc­tion pressure.
Equalized run time — The controller will equalize run time on each circuit through the lead / lag feature. If a cir­cuit becomes disabled, the control will automatically set the active circuit to lead, keeping the chiller online at a reduced capacity.
Sensors — Thermistors are used to control temperature sensing inputs to the microprocessor. No additional ther­mistor sensors are required for leaving chilled water tem­perature, optional return water reset, or outdoor air reset.
The following sensors can be used on 30XW units:
• Evaporator leaving fluid temperature (T1)
19
Page 20
Controls (cont)
• Evaporator entering fluid temperature (T2)
• Suction gas temperature (T4 - Circuit A, T7 - Circuit B)
• Economizer gas temperature (T5 - Circuit A, T11 ­Circuit B) (sizes 350, 400 only)
• Space temperature (T8)
• Discharge gas temperature (T9 - Circuit A, T10 ­Circuit B)
• Condenser entering fluid temperature (T12)
• Condenser leaving fluid temperature (T13)
• Compressor motor temperature
There are 3 (size 325) or 4 (sizes 350, 400) refrigerant pressure transducers used in each circuit for sensing suc­tion, discharge, oil, and economizer (sizes 350, 400) pres­sure. The microprocessor uses these inputs to control capacity.
• Saturated condensing temperature
• Evaporator saturation temperature
Electronic expansion valve (EXV) — The EXV con­trols refrigerant flow to the evaporator for different operat­ing conditions by varying an orifice size to increase or decrease the flow area through the valve based on micro­processor input. The orifice is positioned by a stepper motor through approximately 3,600 discrete steps and is monitored every 3 seconds.
Safeties
Abnormal conditions — All control safeties in the chiller
operate through compressor protection board, control relays or the chiller microprocessor. Loss of feedback sig­nal to the MBB will cause the compressor(s) to shut down. For other safeties, the microprocessor makes appropriate decision to shut down a compressor due to a safety trip or bad sensor reading and displays the appropriate failure code on the display. Chiller holds in safety mode until reset; it then reverts to normal control when the unit is reset.
Low-pressure safety — This safety will shut down the chiller and display the appropriate alarm code if the system pressure drops below configured minimums.
High-pressure safety — This safety will shut down the chiller and display the appropriate alarm code if the com­pressor discharge pressure increases to 185 psig for stan­dard condenser units or 250 psig for high condensing or heat machine units.
Compressor anti-cycling — This feature monitors com­pressor starts to limit compressor cycling during periods of low load.
Loss of flow protection — This feature will shut off the chiller if the detected flow is below the configured mini­mum flow rate. Thermal dispersion flow switches are installed in 30XW chillers to confirm evaporator flow.
Sensor failures — The microprocessor monitors tem­perature and pressure sensors to ensure readings are within the expected range. Loss of communication to a sensor or readings outside of the expected range will prompt corrective action.
Other safeties — Other safety features include electric overload, thermal overload protection, oil pressure, loss of refrigerant charge, loss of phase protection, reverse rotation protection (prevents compressor start), current imbalance, and ground current.
Demand limit function — This function can be used to limit the total power draw of the chiller to a user-defined set point. The optional energy management module is required and can provide either 2-step or 4 to 20 mA demand limit. This optional electronic board interfaces with the microprocessor to control the number of com­pressors operating and their operating capacity to limit power consumption to the user specified value.
The microprocessor can control the number of compres­sors operating and their operating capacity to limit power consumption to the user specified value.
Diagnostics — The microprocessor includes a service test feature that displays the condition of each sensor and switch in the chiller and allows the observer to check for proper operation of the compressors. Refer to the Con­trols, Start Up, Operation, Service and Troubleshooting guide for further information.
Default settings — To facilitate quick start-ups, 30XW chillers are pre-configured with a default setting that assumes stand-alone operation with a 44 F (6.6 C) chilled water set point. Configuration settings will be based on any options or accessories included with the unit at the time of manufacturing. Date and time are set to U.S.A. Eastern Time zone and will need reconfiguring based on location and local time zone. If operation based on occupancy schedule is desired, the schedule must be set during installation.
Additional information — Detailed information on con­trols and operation is available in the Controls, Start-Up, Operation, Service and Troubleshooting guide included with each unit. Packaged Service Training programs are also available. Contact your local Carrier representative for more information.
20
Page 21

Typical control wiring schematics

30XW UNIT CONTROL WIRING SCHEMATIC
a30-4697
LEGEND
AWG American Wire Gage NEC National Electrical Code CB Circuit Breaker PMP Chilled Water Pump COM Communication Port PMPI Chilled Water Pump Interlock EMM Energy Management Module TB Ter m i na l B lo c k EQUIP GND Equipment Ground Field Power Wiring FIOP Factory-Installed Option Field Control Wiring MLV Minimum Load Valve Factory-Installed Wiring
NOTES:
1. Factory wiring is in accordance with UL 1995 standards. Field modifica­tions or additions must be in compliance with all applicable codes.
2. Wiring for main field supply must be rated 75C minimum. Use copper for all units. Incoming wire size range for the terminal block is #4 AWG to 500 kcmil for single point power (two conductors per phase). Incoming wire size range for the terminal blocks for dual point power option is #4 AWG to 500 kcmil for single point power (one conductor per phase). Incoming wire size range for 200/300-v models is 3/0 to 500 kcmil for sin­gle point power (one conductor per phase).
3. Terminals 9 and 10 of TB5 are for field external connections for remote on-off. The contacts must be rated for dry circuit application capable of handling a 24-vac load up to 50 mA.
4. Terminals 1 and 2 of TB5 are for external connections of chilled water pump interlock. The contacts must be rated for dry circuit application capable of handling a 24-vac load up to 50 mA.
5. Terminals 11 and 13 of TB5 are for control of chilled water pump 1 (PMP 1) starter. Terminals 15 and 13 of TB5 are for control of chilled water pump 2 (PMP 2) starter. Remove factory-installed jumper when using pump interlock. The maximum load allowed for the chilled water pump relay is 5-va sealed, 10-va inrush at 24-v. Field power supply is not required.
6. For control of chilled water pumps, a set of normally open contacts rated for dry circuit application must be supplied from field-supplied pump starter relay. Connect contacts directly to connector at main base board channel 18.
7. Terminals 12 and 13 of TB5 are for an alarm relay. The maximum load allowed for the alarm relay is 10-va sealed, 25-va inrush at 24-v. Field power supply is not required.
8. Make appropriate connections to TB6 as shown for energy management board options. The contacts for occupancy override, demand limit, and ice done options must be rated for dry circuit application capable for han­dling a 24-vac load up to 50 mA.
9. Terminal blocks TB5 and TB6 are located in the display panel box for all units. Refer to certified dimensional drawing for each unit to get the exact locations.
10. Refer to certified dimensional drawings for exact locations of the main power and control power entrance locations.
11. For control of condenser pump, connect field-supplied relay (max 5-va sealed, 10-va inrush at 24-v) directly to connector at main base board channel 22.
12. For head pressure control option, 0-10-vdc signal wires are factory­installed (violet and brown) from HGBP/COND board channel 9. Refer to controls manual for application with field-supplied water regulating valve.
21
Page 22

Application data

Unit storage
Store chiller and starter indoors, protected from construc­tion dirt and moisture. Inspect under shipping tarps, bags, or crates to be sure water has not collected during transit. Keep protective shipping covers in place until machine is ready for installation. Assure that the inside of the protec­tive cover meets the following criteria:
• Temperature is between 40 F (4.4 C) and 120 F (48.9 C)
• Relative humidity is between 10% and 80% (non­condensing)
Chiller location
Unit should be located indoors on a level surface in an area with temperatures between 50 F (10 C) and 104 F (40 C). Clearance should be provided around the unit for service and local code requirements. See dimensional drawings for specific unit clearance requirements. Consideration should be given to using rubber-in-shear pads. For applications other than ground to slab, it is recommended spring isola­tors are used to minimize structure borne transmission. Acoustic consideration should be given near sound sensi­tive areas.
Relief valve vent lines:
1. Vent per local code requirements.
2. Each chiller has 2 relief valves on the evaporator, 2 on the condenser and one relief valve on each com­pressor discharge line.
Evaporator flow range
For minimum and maximum evaporator flow rates please see the Evaporator and Condenser Flow Rates table. A high flow rate is generally limited by the maximum pres­sure drop that can be tolerated by the unit. The 30XW chillers are designed for a full load temperature rise of 5 to 20 F (2.8 to 11.1 C). See the Carrier selection program for pressure drop values and performance.
Minimum evaporator flow
When system design conditions require a lower flow (or higher temperature rise) than the minimum allowable evap­orator flow rate, please follow the recommendations below.
• Multiple smaller chillers may be applied in series, each providing a portion of the design temperature rise.
• Try increasing the number of passes in the evaporator (1, 2, or 3 passes available).
• Evaporator fluid may be recirculated to raise the flow rate to the chiller. The mixed temperature entering the evaporator must be maintained to a minimum of at least 5 F (2.8 C) above the leaving chilled fluid tempera­ture and a maximum of no more than 20 F (11.1 C) above the leaving chilled fluid temperature.
NOTE: Recirculation flow is shown below.
Maximum evaporator flow
RECIRCULATION FLOW
Strainers
A screen strainer with minimum screen size of 20 mesh must be installed within 10 ft (3 m) of the inlet pipe con­nection to both the evaporator and condenser to prevent debris from damaging internal tubes of the evaporator. The pump strainer shall not be used to meet this requirement.
Oversizing chillers
Oversizing chillers by more than 15% at design conditions should be avoided as the system operating efficiency is adversely affected (resulting in greater or excessive electri­cal demand). When future expansion of equipment is antic­ipated, install a single chiller to meet present load requirements and add a second chiller to meet the addi­tional load demand. It is also recommended that 2 smaller chillers be installed where operation at minimum load is critical. The operation of a smaller chiller loaded to a greater percentage over minimum is preferred to operating a larger chiller at or near its minimum recommended value. Operation at its minimum load should only be done inter­mittently, not for long periods of time. Minimum load con­trol should not be used as a means to allow oversizing chillers.
Evaporator water temperature
Maximum leaving fluid temperature for the unit is 60 F (15.5 C). The unit can start and pull down with up to 95 F (35 C) entering fluid temperature. For sustained operation, it is recommended the fluid temperature not exceed 70 F (21.1 C). Water flowing through the evaporator should never exceed 100 F (37.8 C). Minimum leaving water tem­perature is 40 F (4.4 C).
CHILLER EVAPORATOR
a30-4698
The maximum evaporator flow (approximately 5 F (2.8 C) rise results in a practical maximum pressure drop through the evaporator. Optional marine waterboxes may help reduce pressure drop by a small amount. If this is insufficient, a return fluid may bypass the evaporator to keep the pressure drop through the evaporator within acceptable limits. This permits a higher delta T with lower fluid flow through the evaporator and mixing after the evaporator.
NOTE: Bypass flow is shown below.
BYPASS FLOW
CHILLER EVAPORATOR
a30-4699
22
Page 23
Variable evaporator flow rates
⋅°⋅
Variable flow rates may be applied to a standard chiller. The unit will, however, attempt to maintain a constant leaving fluid temperature. In such cases minimum flow must be in excess of minimum flow given in the Evaporator and Condenser Flow Rates table, and mini­mum loop volume must be in excess of 3 gallons per ton (3.21 L per kW). Combined flow rate and change in load must not change by more than 10% per minute. Additional loop volume may be necessary to ensure fluid is not quickly recirculated back to the chiller before the chiller has adjusted to the previous change in flow rate and load condition.
Water loop volume
The loop volume in circulation must equal or exceed 3 gal. per nominal ton (3.2 L per kW) of cooling for temperature stability and accuracy in normal air-conditioning applica­tions. In process cooling applications, there should be 6 to 10 gallons per ton (6.5 to 10.8 L per kW). To achieve this loop volume, it is often necessary to install a tank in the loop. The tank should be baffled to ensure there is no strat­ification, and that water (or brine) entering the tank is ade­quately mixed with liquid in the tank. See Tank installation drawing.
TANK INSTALLATION
BAD
GOOD
concentration of at least 15 F (8.3 C) below the leaving fluid temperature set point. If chiller fluid lines are in an area where ambient conditions fall below 34 F (1.1 C), it is recommended that an antifreeze solution be added to pro­tect the unit and fluid piping to a temperature 15 F (8.3 C) below the lowest anticipated temperature. For corrections to performance, refer to the chiller selection program.
NOTE: Use only antifreeze solutions approved for heat exchanger duty. Use of automotive antifreeze is not recom­mended because of the fouling that can occur once their relatively short-lived inhibitors break down.
Multiple chillers
Where multiple chillers are required, or where standby capability is desired, chillers may be installed in parallel. Units may be of the same or different sizes. However, evaporator flow rates must be balanced according to the recommendations of each chiller to ensure proper flow.
Unit software is capable of controlling two units as a sin­gle plant. Refer to the Controls, Start-Up, Operation, Ser­vice and Troubleshooting guide for further details.
Dual chiller control
The chiller on board controller allows 2 chillers (piped in parallel or series) to operate as a single chilled water plant with standard control functions coordinated through the master chiller controller. This feature requires a communi­cation link between the 2 chillers. There are several advan­tages to this type of control:
• Redundancy (multiple circuits)
• Better low load control (lower tonnage capability)
• Lower rigging lift weights (2 machines rather than one
large machine)
• Chiller lead-lag operation (evens the wear between the
two machines)
BAD
a30-3185
GOOD
Evaporator fouling factor
The fouling factor used to calculate tabulated ratings is
0.0001 sq ft hr F/Btu (0.000018 sq m C/W). As fouling factor is increased, both unit capacity and EER (Energy Efficiency Ratio) decrease. The impact of the foul­ing factor on performance varies significantly with chiller size and application conditions. Ratings must be deter­mined by the Carrier selection program.
°
Condenser minimum flow rate
The minimum condenser flow rate is shown in the Mini­mum and Maximum Condenser Flow Rate Table. If the condenser flow rate is below the minimum rate shown, try increasing the number of condenser passes (1 or 2 pass available).
Evaporator and condenser freeze protection
The solution concentration must be sufficient to protect the chilled water loop to a freeze protection (first crystals)
Parallel chiller operation
Parallel chiller operation is the recommended option for dual chiller control. In this case, each chiller must control its own dedicated pumps or isolation valves. Balancing valves are recommended to ensure the proper flow to each chiller. Two field-supplied and installed dual chiller leaving water temperature sensors are required (one for each mod­ule) for this function to operate properly.
Consider adding additional isolation valves to isolate each chiller to allow for service on the machine, and still allow for partial capacity from the other chiller.
Series chiller operation
Series chiller operation is an alternate control method sup­ported by the chiller control system. Certain applications might require that two chillers be connected in series. For nominal 10 F (5.6 C) evaporator ranges, use the one-pass heat exchanger options to reduce fluid side pressure drop. Use the standard pass arrangement for low flow, high tem­perature rise applications. Two field-supplied and installed dual chiller leaving water temperature sensors are required (one for each module) for this function to operate properly.
23
Page 24
Application data (cont)
Consider adding additional piping and isolation valves to isolate each chiller to allow for service on the machine, and still allow for partial capacity from the other chiller.
Even if evaporators are piped in series, parallel con­denser piping should be considered on constant speed chillers to maximize capacity and efficiency while minimiz­ing condenser pressure drop and saturated condensing temperatures. If the condensers are piped in series, ensure that the leaving fluid temperature does not exceed 122 F (50 C) for standard units, or 140 F (60 C) for high con­densing or heat machine condensers.
Electric utility interests
Energy management — Use of energy management
practices can significantly reduce operating costs, espe­cially during off-peak modes of operation. Demand limiting and temperature reset are two techniques for accomplish­ing efficient energy management. See Demand Limiting (also called load shedding) section below for further details.
Demand limiting (load shedding) — When a utility's demand for electricity exceeds a certain level, loads are
shed to keep electricity demand below a prescribed maxi­mum level. Typically, this happens on hot days when air conditioning is most needed. The energy management module (EMM) option can be added to accomplish this reduction. Demand may be limited on the unit by resetting water temperature, or by unloading the chiller to a given predetermined percentage of the load. Demand limit may also be driven by an external 4 to 20 mA signal. These fea­tures require a signal from an intelligent central control.
Duty cycling — Duty cycling will cycle an electrical load at regular intervals regardless of need. This reduces the electrical demand by "fooling" demand measuring devices. Duty cycling of the entire compressor is NOT recom­mended since motor windings and bearing life will suffer from constant cycling.
Remote on-off control — Remote on-off control may be applied by hard-wired connection (see the Controls, Start-Up, Operation, Service and Troubleshooting guide) or by connection to the Carrier Comfort Network system.
®
(CCN)
24
Page 25

Typical piping and wiring

a30-4700
Field Wiring
Field Piping
LEGEND
TO CHILLED
MAIN POWER
SUPPLY
CONTROL POWER
SUPPLY *
EVAPORATOR
WATER PUMP
WATER PUMP
TO CONDENSER
INLET
OUTLET
HEADS, BOTH ENDS
INSULATE EVAPORATOR
VENT
VIBRATION
ISOLATION
VIBRATION
ISOLATION
PRESSURE
GAGE
CONDENSER
30XW
VIBRATION
ISOLATION
SHUT-OFF
VALVE
DRAIN
BALANCING
VALVE
TYPICAL PIPING AND WIRING FOR 30XW EVAPORATOR AND CONDENSER
*Control power supply is not required for chillers ordered with the control power transformer option.
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 upon request. The 30XW
units 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.
BALANCING
VALVE
can be on either side according to chiller configuration ordered.
4. Piping, wiring, switches, valves, vent gages, strainers, drain, and vibration isolation are all field supplied.
5. Water connections are shown on left side (discharge end) of control box in this figure. Actual connections
SHUT-OFF
VALVE
TO
COOLING
LOAD
STRAINER
SHUT-OFF
VALVE
FROM
COOLING
LOAD
CONDENSER
WATER
INLET
CONDENSER
WATER
OUTLET
25
Page 26

Electrical data

STANDARD SINGLE INPUT POWER CONFIGURATION
30XW
UNIT
SIZE
325
325 HM
350
350 HM
400
400 HM
ICF Maximum Instantaneous Current Flow
HM Heat Machine Units
LRA Locked Rotor Amps MCA Minimum Circuit Ampacity (for wire sizing) MOCP — Maximum Overcurrent Protection RLA Rated Load Amps WD Wye-Delta Start XL Across-the-Line Start
NOTES:
1. Each main power source must be supplied from a field-supplied fused electrical service with a (factory-installed or field-installed) disconnect located in sight from the unit.
2. Control circuit power must be supplied from a separate source through a field-supplied disconnect. An optional control transformer may be used to provide control circuit power from the main unit power supply.
UNIT VOLTAGE
V-Ph -H z
200-3-60 187 220 9 920.3 1200 1347.0 1200 115-1-60 20 230-3-60 207 253 9 799.0 1000 1171.1 1000 115-1-60 20 380-3-60 342 418 6 487.6 700 710.7 1753.7 600 115-1-60 20 460-3-60 414 506 6 401.0 500 586.2 1448.2 450 115-1-60 20 575-3-60 518 633 3 317.3 450 467.0 1157.0 400 115-1-60 20 200-3-60 187 220 12 1168.2 1600 1848.2 1600 115-1-60 20 230-3-60 207 253 9 1018.4 1200 1608.6 1200 115-1-60 20 380-3-60 342 418 6 614.5 800 973.1 2452.1 700 115-1-60 20 460-3-60 414 506 6 510.8 700 805.0 2027.0 600 115-1-60 20 575-3-60 518 633 6 406.8 500 642.8 1620.8 450 115-1-60 20 200-3-60 187 220 9 920.3 1200 1347.0 1200 115-1-60 20 230-3-60 207 253 9 799.0 1000 1171.1 1000 115-1-60 20 380-3-60 342 418 6 487.6 700 710.7 1753.7 600 115-1-60 20 460-3-60 414 506 6 401.0 500 586.2 1448.2 450 115-1-60 20 575-3-60 518 633 3 317.3 450 467.0 1157.0 400 115-1-60 20 200-3-60 187 220 12 1168.2 1600 1848.2 1600 115-1-60 20 230-3-60 207 253 9 1018.4 1200 1608.6 1200 115-1-60 20 380-3-60 342 418 6 614.5 800 973.1 2452.1 700 115-1-60 20 460-3-60 414 506 6 510.8 700 805.0 2027.0 600 115-1-60 20 575-3-60 518 633 6 406.8 500 642.8 1610.8 450 115-1-60 20 200-3-60 187 220 9 1041.3 1200 1400.8 1200 115-1-60 20 230-3-60 207 253 9 902.9 1200 1217.3 1200 115-1-60 20 380-3-60 342 418 6 545.2 700 736.3 1779.3 700 115-1-60 20 460-3-60 414 506 6 452.9 600 609.3 1471.3 600 115-1-60 20 575-3-60 518 633 3 366.3 500 488.8 1178.6 450 115-1-60 20 200-3-60 187 220 12 1329.8 1600 1920.0 1600 115-1-60 20 230-3-60 207 253 12 1156.7 1600 1670.1 1600 115-1-60 20 380-3-60 342 418 6 700.9 1000 1011.5 2490.5 800 115-1-60 20 460-3-60 414 506 6 579.8 800 835.7 2057.7 700 115-1-60 20 575-3-60 518 633 6 464.4 600 668.4 1646.4 600 115-1-60 20
LEGEND
Supplied
Min Max WD XL
NO. POWER
SUPPLY
CONDUCTORS
MCA MOCP
3. Maximum instantaneous current flow (ICF) during start-up is the point
4. Maximum incoming wire size for each terminal block is 500 kcmil.
5. Maximum allowable phase imbalance is: voltage, 2%; amps, 5%.
6. Use copper conductors only.
7. The MOCP is calculated as follows:
ICF
in the starting sequence where the sum of the LRA for the star t-up compressor, plus the total RLA for all running compressors is at a maximum.
MOCP = (2.25) (largest RLA) + the sum of the other RLAs. Size the fuse one size down from the result. The RLAs are listed on the nameplate.
The recommended fuse size in amps (RFA) is calculated as follows: RFA = (1.50) (largest RLA) + the sum of the other RLAs. Size the fuse one size up from the result. The RLAs are listed on the nameplate.
REC FUSE
SIZE
CONTROL CIRCUIT
V-Ph -H z
MCA and
MOCP
26
Page 27
OPTIONAL DUAL INPUT POWER CONFIGURATION
30XA UNIT SIZE
UNIT VOLTAGE
V-Ph -H z
NO. POWER
Supplied
Min Max WD XL
SUPPLY
CONDUCTORS
MCA MOCP
200-3-60 187 220 6/6 511.3/511.3 800/800 938/938 700 700 115-1-60 20 230-3-60 207 253 6/6 443.9/443.9 700/700 816/816 600 600 115-1-60 20
325
380-3-60 342 418 3/3 270.9/270.9 450/450 494/494 1537/1537 350 350 115-1-60 20 460-3-60 414 506 3/3 222.8/222.8 400/400 408/408 1270/1270 300 300 115-1-60 20 575-3-60 518 633 3/3 176.3/176.3 300/300 326/326 1016/1016 225 225 115-1-60 20 200-3-60 187 220 6/6 649.0/649.0 1000/1000 1329/1329 800 800 115-1-60 20
325
HM
230-3-60 207 253 6/6 565.8/565.8 1000/1000 1156/1156 700 700 115-1-60 20 380-3-60 342 418 3/3 341.4/341.4 600/600 700/700 2179/2179 450 450 115-1-60 20 460-3-60 414 506 3/3 283.8/283.8 500/500 578/578 1800/1800 350 350 115-1-60 20 575-3-60 518 633 3/3 226.0/226.0 400/400 462/462 1440/1440 300 300 115-1-60 20 200-3-60 187 220 6/6 511.3/511.3 800/800 938/938 700 700 115-1-60 20 230-3-60 207 253 6/6 443.9/443.9 700/700 816/816 600 600 115-1-60 20
350
380-3-60 342 418 3/3 270.9/270.9 450/450 494/494 1537/1537 350 350 115-1-60 20 460-3-60 414 506 3/3 222.8/222.8 400/400 408/408 1270/1270 300 300 115-1-60 20 575-3-60 518 633 3/3 176.3/176.3 300/300 326/326 1016/1016 225 225 115-1-60 20 200-3-60 187 220 6/6 649.0/649.0 1000/1000 1329/1329 800 800 115-1-60 20
350
HM
230-3-60 207 253 6/6 565.8/565.8 1000/1000 1156/1156 700 700 115-1-60 20 380-3-60 342 418 3/3 341.4/341.4 600/600 700/700 2179/2179 450 450 115-1-60 20 460-3-60 414 506 3/3 283.8/283.8 500/500 578/578 1800/1800 350 350 115-1-60 20 575-3-60 518 633 3/3 226.0/226.0 400/400 462/462 1440/1440 300 300 115-1-60 20 200-3-60 187 220 6/6 578.5/578.5 1000/1000 938/938 700 700 115-1-60 20 230-3-60 207 253 6/6 501.6/501.6 800/800 816/816 700 700 115-1-60 20
400
380-3-60 342 418 3/3 302.9/302.9 500/500 494/494 1537/1537 400 400 115-1-60 20 460-3-60 414 506 3/3 251.6/251.6 450/450 408/408 1270/1270 350 350 115-1-60 20 575-3-60 518 633 3/3 203.5/203.5 350/350 326/326 1016/1016 250 250 115-1-60 20 200-3-60 187 220 6/6 738.8/738.8 1200/1200 1329/1329 1000 1000 115-1-60 20
400
HM
230-3-60 207 253 6/6 642.6/642.6 1000/1000 1156/1156 800 800 115-1-60 20 380-3-60 342 418 6/6 389.4/389.4 600/600 700/700 2179/2179 500 500 115-1-60 20 460-3-60 414 506 3/3 322.1/322.1 500/500 578/578 1800/1800 400 400 115-1-60 20 575-3-60 518 633 3/3 258.0/258.0 450/450 462/462 1440/1440 350 350 115-1-60 20
LEGEND
ICF Maximum Instantaneous Current Flow
HM Heat Machine Units
LRA Locked Rotor Amps MCA Minimum Circuit Ampacity (for wire sizing) MOCP — Maximum Overcurrent Protection RLA Rated Load Amps WD Wye-Delta Start XL Across-the-Line Start
NOTES:
1. Each main power source must be supplied from a field-supplied fused electrical service with a (factory-installed or field-installed) disconnect located in sight from the unit.
2. Control circuit power must be supplied from a separate source through a field-supplied disconnect. An optional control transformer may be used to provide control circuit power from the main unit power supply.
ICF
REC FUSE
SIZE
3. Maximum instantaneous current flow (ICF) during start-up is the point in the starting sequence where the sum of the LRA for the start-up com­pressor, plus the total RLA for all running compressors is at a maximum.
4. Maximum incoming wire size for each terminal block is 500 kcmil.
5. Maximum allowable phase imbalance is: voltage, 2%; amps, 5%.
6. Use copper conductors only.
7. The MOCP is calculated as follows: MOCP = (2.25) (largest RLA) + the sum of the other RLAs. Size the fuse
one size down from the result. The RLAs are listed on the nameplate.
The recommended fuse size in amps (RFA) is calculated as follows: RFA = (1.50) (largest RLA) + the sum of the other RLAs. Size the fuse
one size up from the result. The RLAs are listed on the nameplate.
CONTROL CIRCUIT
V-Ph -H z
MCA and
MOCP
27
Page 28
Electrical data (cont)
COMPRESSOR ELECTRICAL DATA
30HX UNIT
SIZE
325
325 HM
350
350 HM
400
400 HM
LEGEND
HM Heat Machine Units LRA Locked Rotor Amps N/A Not Applicable RLA Rated Load Amps WD Wye-Delta Start XL Across-the-Line Start
VO LTAGE
V-Ph -H z
200-3-60 06TU483 409.0 938 N/A 409.0 938 N/A 230-3-60 06TU483 355.1 816 N/A 355.1 816 N/A 380-3-60 06TU483 216.7 494 1537 216.7 494 1537 460-3-60 06TU483 178.2 408 1270 178.2 408 1270 575-3-60 06TU483 141.0 326 1016 141.0 326 1016 200-3-60 06TU483 519.2 1329 N/A 519.2 1329 N/A 230-3-60 06TU483 452.6 1156 N/A 452.6 1156 N/A 380-3-60 06TU483 273.1 700 2179 273.1 700 2179 460-3-60 06TU483 227.0 578 1800 227.0 578 1800 575-3-60 06TU483 180.8 462 1440 180.8 462 1440 200-3-60 06TU483 409.0 938 N/A 409.0 938 N/A 230-3-60 06TU483 355.1 816 N/A 355.1 816 N/A 380-3-60 06TU483 216.7 494 1537 216.7 494 1537 460-3-60 06TU483 178.2 408 1270 178.2 408 1270 575-3-60 06TU483 141.0 326 1016 141.0 326 1016 200-3-60 06TU483 519.2 1329 N/A 519.2 1329 N/A 230-3-60 06TU483 452.6 1156 N/A 452.6 1156 N/A 380-3-60 06TU483 273.1 700 2179 273.1 700 2179 460-3-60 06TU483 227.0 578 1800 227.0 578 1800 575-3-60 06TU483 180.8 462 1440 180.8 462 1440 200-3-60 06TU554 462.8 938 N/A 462.8 938 N/A 230-3-60 06TU554 401.3 816 N/A 401.3 816 N/A 380-3-60 06TU554 242.3 494 1537 242.3 494 1537 460-3-60 06TU554 201.3 408 1270 201.3 408 1270 575-3-60 06TU554 162.8 326 1016 162.8 326 1016 200-3-60 06TU554 591.0 1329 N/A 591.0 1329 N/A 230-3-60 06TU554 514.1 1156 N/A 514.1 1156 N/A 380-3-60 06TU554 311.5 700 2179 311.5 700 2179 460-3-60 06TU554 257.7 578 1800 257.7 578 1800 575-3-60 06TU554 206.4 462 1440 206.4 462 1440
COMPRESSOR
COMPRESSOR A COMPRESSOR B
RLA LRA (WD) LRA (XL) RLA LRA (WD) LRA (XL)
28
Page 29

Guide specifications

Water-Cooled Chiller
HVAC Guide Specifications
Size Range: 325 to 400 Nominal Tons
(1133 to 1354 kW)
Carrier Model Number: 30XW Part 1 — General
1.01 SYSTEM DESCRIPTION Microprocessor controlled water-cooled liquid chiller
utilizing screw compressors and electronic expan­sion valves.
1.02 QUALITY ASSURANCE
A. Unit shall be rated in accordance with AHRI Stan-
dard 550/590 (U.S.A.), latest edition.
B. Unit construction shall comply with ASHRAE 15
Safety Code, NEC, and ASME applicable codes (U.S.A. codes).
C. Unit shall be manufactured in a facility registered to
ISO 9001:2000 Manufacturing Quality Standard.
D. 200-v, 230-v, 460-v, 575-v, 60 Hz units shall be
constructed in accordance with UL or UL Canada standards and shall be tested and listed by ETL or ETL, Canada, as conforming to those standards. Units shall carry the ETL and ETL, Canada, labels.
1.03 DELIVERY, STORAGE, AND HANDLING
A. Unit controls shall be capable of withstanding 150 F
(65.5 C) storage temperatures in the control compartment.
B. Chiller and starter should be stored indoors, pro-
tected from construction dirt and moisture. An inspection should be conducted under shipping tarps, bags, or crates to be sure water has not col­lected during transit. Protective shipping covers should be kept in place until machine is ready for installation. The inside of the protective cover should meet the following criteria:
1. Temperature is between 40 F (4.4 C) and 120 F (48.9 C).
2. Relative humidity is between 10% and 80% (non-condensing).
Part 2 — Products
2.01 EQUIPMENT A. General:
Factory assembled, single-piece, water-cooled liquid chiller with dual (2) independent refrigerant circuits. Contained within the unit cabinet shall be all factory wiring, piping, controls, refrigerant charge (HFC­134a) and special features required prior to field start-up.
B. Compressors:
1. Semi-hermetic twin-screw compressors with internal muffler and check valve.
2. Each compressor shall be equipped with a dis­charge shutoff valve.
C. Evaporator:
1. Shall be tested and stamped in accordance with ASME Code (U.S.A.) for a refrigerant working-side pressure of 220 psig (1408 kPa). Water-side pressure rating shall be 150 psig (1034 kPa). In Canada, maximum water-side pressure shall be 250 psig (1725 kPa), per the Canadian National Registry.
2. Shall be mechanically cleanable shell-and-tube type with removable heads.
3. Tubes shall be internally enhanced, seamless­copper type, and shall be rolled into tube sheets.
4. Shall be equipped with victaulic fluid connections.
5. Shell shall be insulated with closed-cell, polyvinyl chloride foam with a maxi­mum K factor of 0.28. Heads may require field insulation.
6. Shall have a evaporator drain and vent.
7. Design shall incorporate 2 independent refrig­erant circuits.
8. Shall include isolation valves to allow isolation of the refrigerant charge in either the evapora­tor or the condenser.
9. Shall be equipped with factory-installed thermal dispersion chilled fluid flow switch.
D. Condenser:
1. Shall be tested and stamped in accordance with ASME code (U.S.A.) for a refrigerant working-side pressure of 220 psig (1408 kPa). Water-side pressure rating shall be 150 psig (1034 kPa). In Canada, maximum water-side pressure shall be 250 psig (1725 kPa), per the Canadian National Registry.
2. Shall be mechanically cleanable shell-and-tube type with removable heads.
3. Tubes shall be internally enhanced, seamless­copper type, and shall be rolled into tube sheets.
4. Shall be equipped with victaulic water connections.
5. Design shall incorporate 2 independent refrig­erant circuits.
E. Heat Machines:
1. Condenser shall be tested and stamped in accordance with ASME Code (U.S.A.) for a refrigerant working-side pressure of 300 psig (2068 kPa).
2. Design shall incorporate 2 independent refrig­erant circuits.
3. Heat machine condensers shall include factory­installed thermal insulation on the condenser, condenser flow switch and leaving water temperature sensor. Heat machine units require field-installed thermal insulation on the
3
/4-in. (19-mm)
29
Page 30
Guide specifications (cont)
compressor discharge piping and waterbox heads because of high temperature.
F. Refrigeration Components:
Refrigerant circuit components shall include oil sep­arator, high and low side pressure relief devices, dis­charge and liquid line shutoff valves, filter drier, moisture indicating sight glass, expansion valve, refrigerant economizer (unit sizes 350, 400), and complete charge of compressor oil. The units shall have a complete operating charge of refrigerant HFC-134a.
G. Controls:
1. Unit controls shall include the following mini­mum components:
a. Microprocessor with non-volatile memory.
Battery backup system shall not be accepted.
b. Separate terminal block for power and
controls.
c. Separate 115-v power supply to serve all
controllers, relays, and control components. d. ON/OFF control switch. e. Replaceable solid-state controllers. f. Pressure sensors installed to measure
suction, oil, economizer, and discharge
pressure. Thermistors installed to measure
evaporator entering and leaving fluid
temperatures.
2. Unit controls shall include the following functions:
a. Automatic circuit lead/lag. b. Capacity control based on leaving chilled
fluid temperature and compensated by rate of change of return-fluid temperature with temperature set point accuracy to 0.1° F (0.05° C).
c. Limiting the chilled fluid temperature
pulldown rate at start-up to an adjustable range of 0.2° F to 2° F (0.1 to 1.1° C) per minute to prevent excessive demand spikes
at start-up. d. Seven-day time schedule. e. Leaving chilled fluid temperature reset from
return fluid and outside air temperature. f. Chilled water and condenser water pump
start/stop control. g. Chiller control for parallel chiller applications
without addition of hardware modules and
control panels (requires thermistors). h. Timed maintenance scheduling to signal
maintenance activities for strainer
maintenance and user-defined maintenance
activities. i. Single step demand limit control activated by
remote contact closure.
H. Safeties:
Unit shall be equipped with thermistors and all nec­essary components in conjunction with the control system to provide the unit with the following protections:
1. Loss of refrigerant charge.
2. Reverse rotation.
3. Low chilled fluid temperature.
4. Motor overtemperature.
5. High pressure.
6. Electrical overload.
7. Loss of phase.
8. Loss of chilled water flow
I. Diagnostics:
1. The control panel shall include, as standard, a display:
a. Touch screen display consisting of ¼ VGA
LCD (liquid crystal display) with adjustable contrast and backlighting.
b. Display shall allow a user to navigate
through menus, select desired options and modify data.
2. Features of the display shall include: a. Display shall be customizable and allow up to
72 data points.
b. Display shall support both local equipment
or network made for remote mount.
c. Display shall allow access to configuration,
maintenance, service, set point, time sched­ules, alarm history and status data.
d. Display shall have one button for chiller on/
off.
e. Display shall include three levels of password
protection against unauthorized access to configuration and maintenance informa­tion, and display set up parameters.
f. Display shall allow for easy connection of a
portable hand held technician tool to access information and upload and/or download chiller settings.
g. Display shall be compatible with the Carrier
Comfort Network vide network alarm acknowledgement or indication and provide capability to fully monitor and control chiller.
h. Display alarms and parameters shall be
capable of being displayed in full text.
i. Display shall be capable of displaying the last
50 alarms and will store a snapshot of a minimum of 20 status data parameters for
each alarm. j. Compressor run hours. k. Compressor number of starts. l. Compressor current.
®
(CCN) system and pro-
30
Page 31
m. Time of day:
1) Display module, in conjunction with the microprocessor, must also be capable of displaying the output (results) of a ser­vice test. Service test shall verify opera­tion of every switch, thermistor, and compressor before chiller is started.
2) Diagnostics shall include the ability to review a list of the 30 most recent alarms with clear language descriptions of the alarm event. Display of alarm codes without the ability for clear lan­guage descriptions shall be prohibited.
3) An alarm history buffer shall allow the user to store no less than 30 alarm events with clear language descriptions, time and date stamp event entry.
4) The chiller controller shall include multi­ple connection ports for communicating with the local equipment network, the Carrier Comfort Network (CCN) sys­tem and the ability to access all chiller control functions from any point on the chiller.
5) The control system shall allow software upgrade without the need for new hard­ware modules.
J. Operating Characteristics:
Unit shall be capable of starting up with 95 F (35 C) entering fluid temperature to the evaporator.
K. Electrical Requirements:
1. Unit primary electrical power supply shall enter the unit at a single location.
2. Unit shall operate on 3-phase power at the volt­age shown in the equipment schedule.
3. Control voltage shall be 115-v (60 Hz), single­phase, separate power supply.
L. Special Features:
Certain standard features are not applicable when the features designated by * are specified. For assis­tance in amending the specifications, contact your local Carrier Sales office.
* 1. Wye-Delta Starter:
Unit shall have a factory-installed, wye-delta starter to minimize electrical inrush current.
2. Vibration Isolation: Unit shall be supplied with rubber-in-shear
vibration isolators for field installation.
3. Control Power Transformer: Unit shall be supplied with a factory-installed
controls transformer that will supply control cir­cuit power from the main unit power supply.
4. Temperature Reset Sensor: Unit shall reset leaving chilled fluid temperature
based on outdoor ambient temperature or space temperature when this sensor is installed.
* 5. Minimum Load Control:
Unit shall be equipped with factory-installed, microprocessor-controlled, minimum load con­trol that shall permit unit operation down to 10% of full capacity.
6. One-Pass Evaporator: Factory-installed option shall reduce pressure
drop for high flow applications.
7. Three-Pass Evaporator: Factory-installed option shall enhance perfor-
mance for low flow applications.
8. Energy Management Module: A factory or field installed module shall provide
the following energy management capabilities: 4 to 20 mA signals for leaving fluid temperature reset, cooling set point reset or demand limit control; 2-point demand limit control (from 0 to 100%) activated by a remote contact closure; and discrete input for "Ice Done" indication for ice storage system interface.
9. BACnet™ Translator Control: Unit shall be supplied with field-installed inter-
face between the chiller and a BACnet Local Area Network (LAN, i.e., MS/TP EIA-485).
10. LON Translator Control: Unit shall be supplied with field-installed inter-
face between the chiller and a Local Operating Network (LON, i.e., LonWorks
®
FT-10A
ANSI/EIA-709.1).
11. Navigator™ Hand Held Portable Display: a. Portable hand held display module with a
minimum of 4 lines and 20 characters per line, or clear English, Spanish, Portuguese or French language.
b. Display menus shall provide clear language
descriptions of all menu items, operating modes, configuration points and alarm diag­nostics. Reference to factory codes shall not be accepted.
c. RJ-14 connection plug shall allow display
module to be connected to factory-installed receptacle.
d. Industrial grade coiled extension cord shall
allow the display module to be moved around the chiller.
e. Magnets shall hold the display module to
any sheet metal panel to allow hands-free operation.
f. Display module shall have NEMA 4x
housing.
g. Display shall have back light and contrast
adjustment for easy viewing in bright sun­light or night conditions.
h. Raised surface buttons with positive tactile
response.
31
Page 32
Guide specifications (cont)
12. Compressor Suction Service Valve: Standard refrigerant discharge isolation and
liquid valves enable service personnel to store the refrigerant charge in the evaporator or condenser during servicing. This factory­installed option allows for further isolation of the compressor from the evaporator vessel.
13. GFI Convenience Outlet: Shall be factory or field-installed and mounted
with easily accessible 115-v female receptacle. Shall include 4 amp GFI receptacle.
14. 300 psig (2068 kPa) Evaporator Operating Pressure:
This option shall provide for water-side pres­sure operation up to 300 psig (2068 kPa).
15. 300 psig (2068 kPa) Condenser Operating Pressure:
This option shall provide for water-side pres­sure operation up to 300 psig (2068 kPa).
16. Marine Waterboxes: Marine waterboxes shall provide water piping
connections extending from the side of the waterbox (as opposed to extending from the end of the waterbox). This option also includes a removable bolt on waterbox cover allowing access to the heat exchanger tubes without breaking the existing field piping. This option is available for both the evaporator and condenser.
17. Flanged Connection: The flanged connection option shall provide
an ANSI flange on the end of the chiller water piping for connection to a customer supplied mating flange in the field piping. This option is available for both the evaporator and condenser.
18. One-Pass Condenser: This option shall provide a lower pressure
drop through the condenser for applications with low delta T (temperature) or high flow or where the condensers are piped in a series. The one-pass condenser option is only avail­able with flanged connections and with a dis­charge end leaving water connection.
19. Dual Point Power: The dual point power option shall provide a
means for connecting two sources of power to dual compressor chillers. One source of power is wired to operate the compressor on the A circuit and one source of power is wired to operate the compressor on the B circuit of the chiller.
20. Non-Fused Disconnect: This option shall provide a no load, lockable,
through the door handle disconnect for unit power on the chiller. On dual point power, one disconnect is provided for each of the two main power supplies. This disconnect does not remove the control circuit from power supply.
21. Control Transformer: The control transformer shall be sized to sup-
ply the needs of the control circuit from the main power supply.
22. Nitrogen Charge: A nitrogen charge option is available to pro-
vide a 15 lb (6.8 kg) charge of nitrogen instead of a full factory charge of R-134a refrigerant to keep the chiller refrigerant cir­cuit dry during shipment. This option is rec­ommended for applications where the unit will be disassembled prior to installation. Units shipped with a nitrogen charge will receive an electrical continuity test at the factory prior to shipment.
23. Crate for Shipment: This option is recommended for export
orders. The chiller will be bagged prior to being placed in a wooden crate.
24. Remote Enhanced Display: This option is a remotely mounted indoor
40-character per line, 16-line display panel for unit monitoring and diagnostics.
25. Vibration Springs: A set of non-siesmic spring isolators can be
provided for installation at the jobsite.
Section 9 Ta b 9 a
Carrier Corporation • Syracuse, New York 13221 6-09
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Pg 32 Catalog No. 04-52300015-01 Printed in U.S.A. Form 30XW-2PD
Replaces: 30XW-1PD
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