Carrier HFC-134A User Manual

23XRV High-Efficiency Variable Speed Screw Chiller

Installation Instructions

SAFETY CONSIDERATIONS

Screw liquid chillers are designed to provide safe and reliable service when operated within design specifications. When operating this equipment, use good judgment and safety precautions to avoid damage to equipment and property or injury to personnel.

Be sure you understand and follow the procedures and safety precautions contained in the machine instructions, as well as those listed in this guide.

DO NOT VENT refrigerant relief devices within a building. Outlet from rupture disc or relief valve must be vented outdoors in accordance with the latest edition of ANSI/ASHRAE 15 (American National Standards Institute/American Society of Heating, Refrigeration and Air-Conditioning Engineers) (Safety Code for Mechanical Refrigeration). The accumulation of refrigerant in an enclosed space can displace oxygen and cause asphyxiation.

PROVIDE adequate ventilation in accordance with ANSI/ ASHRAE 15, especially for enclosed and low overhead spaces. Inhalation of high concentrations of vapor is harmful and may cause heart irregularities, unconsciousness, or death. Intentional misuse can be fatal. Vapor is heavier than air and reduces the amount of oxygen available for breathing. Product causes eye and skin irritation. Decomposition products are hazardous.

DO NOT USE OXYGEN to purge lines or to pressurize a machine for any purpose. Oxygen gas reacts violently with oil, grease, and other common substances.

DO NOT USE air to leak test. Use only refrigerant or dry nitrogen. NEVER EXCEED specified test pressures. VERIFY the allowable

test pressure by checking the instruction literature and the design pressures on the equipment nameplate.

DO NOT VALVE OFF any safety device. BE SURE that all pressure relief devices are properly installed and

functioning before operating any machine. RISK OF INJURY OR DEATH by electrocution. High voltage

is present on motor leads even though the motor is not running. Open the power supply disconnect before touching motor leads or terminals.

DO NOT WELD OR FLAMECUT any refrigerant line or vessel until all refrigerant (liquid and vapor) has been removed from chiller. Traces of vapor should be displaced with dry air or nitrogen and the work area should be well ventilated. Refrigerant in contact with an

open flame produces toxic gases.

DO NOT USE eyebolts or eyebolt holes to rig heat exchangers or the entire assembly.

DO NOT work on high-voltage equipment unless you are a qualified electrician.

DO NOT WORK ON electrical components, including control panels, switches, starters, or oil heater until you are sure ALL POWER IS OFF and no residual voltage can leak from capacitors or solid-state components.

LOCK OPEN AND TAG electrical circuits during servicing. IF WORK IS INTERRUPTED, confirm that all circuits are deenergized before resuming work.

AVOID SPILLING liquid refrigerant on skin or getting it into the eyes. USE SAFETY GOGGLES. Wash any spills from the skin with soap and water. If liquid refrigerant enters the eyes, IMMEDIATELY FLUSH EYES with water and consult a physician.

EVERGREEN®

with Foxfire™ Compression Technology

and PIC III Controls

50/60 Hz

HFC-134a

NEVER APPLY an open flame or live steam to a refrigerant cylinder. Dangerous over pressure can result. When it is necessary to heat refrigerant, use only warm (110 F [43 C]) water.

DO NOT REUSE disposable (nonreturnable) cylinders or attempt to refill them. It is DANGEROUS AND ILLEGAL. When cylinder is emptied, evacuate remaining gas pressure, loosen the collar, and unscrew and discard the valve stem. DO NOT INCINERATE.

CHECK THE REFRIGERANT TYPE before adding refrigerant to the machine. The introduction of the wrong refrigerant can cause machine damage or malfunction.

Operation of this equipment with refrigerants other than those cited herein should comply with ANSI/ASHRAE 15 (latest edition). Contact Carrier for further information on use of this machine with other refrigerants.

DO NOT ATTEMPT TO REMOVE fittings, covers, etc., while machine is under pressure or while machine is running. Be sure pressure is at 0 psig (0 kPa) before breaking any refrigerant connection.

CAREFULLY INSPECT all relief valves, rupture discs, and other relief devices AT LEAST ONCE A YEAR. If machine operates in a corrosive atmosphere, inspect the devices at more frequent intervals.

DO NOT ATTEMPT TO REPAIR OR RECONDITION any relief valve when corrosion or build-up of foreign material (rust, dirt, scale, etc.) is found within the valve body or mechanism. Replace the valve.

DO NOT install relief devices in series or backwards. USE CARE when working near or in line with a compressed spring.

Sudden release of the spring can cause it and objects in its path to act as projectiles.

DO NOT STEP on refrigerant lines. Broken lines can whip about and release refrigerant, causing personal injury.

DO NOT climb over a machine. Use platform, catwalk, or staging. Follow safe practices when using ladders.

USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to lift or move inspection covers or other heavy components. Even if components are light, use mechanical equipment when there is a risk of slipping or losing your balance.

BE AWARE that certain automatic start arrangements CAN ENGAGE THE STARTER, TOWER FAN, OR PUMPS. Open the disconnect ahead of the starter, tower fan, and pumps. Shut off the machine or pump before servicing equipment.

USE only repaired or replacement parts that meet the code requirements of the original equipment.

DO NOT VENT OR DRAIN waterboxes containing industrial brines, liquid, gases, or semisolids without the permission of your process control group.

DO NOT LOOSEN waterbox cover bolts until the waterbox has been completely drained.

DOUBLE-CHECK that coupling nut wrenches, dial indicators, or other items have been removed before rotating any shafts.

DO NOT LOOSEN a packing gland nut before checking that the nut has a positive thread engagement.

PERIODICALLY INSPECT all valves, fittings, and piping for corrosion, rust, leaks, or damage.

PROVIDE A DRAIN connection in the vent line near each pressure relief device to prevent a build-up of condensate or rain water.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 2 Ta b 5 e

Catalog No. 532-309 Printed in U.S.A. Form 23XRV-1SI Pg 1 309 6-06 Replaces: New

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Job Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

Receiving the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

• INSPECT SHIPMENT

• IDENTIFY MACHINE

• INSTALLATION REQUIREMENTS

• PROVIDE MACHINE PROTECTION

Rigging the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

• RIG MACHINE ASSEMBLY

• RIG MACHINE COMPONENTS

Separate Machine Components . . . . . . . . . . . . . . . . . 13

• SEPARATE COOLER AND CONDENSER

• REMOVE THE CONTROLS/DRIVE ENCLOSURE FROM THE CONDENSER

• REMOVE THE DISCHARGE PIPE ASSEMBLY FROM THE CONDENSER

• SEPARATE THE COMPRESSOR FROM THE CONDENSER

• SEPARATE THE VAPORIZER FROM THE CONDENSER

VFD Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Install Machine Supports . . . . . . . . . . . . . . . . . . . . . . . . 22

• INSTALL STANDARD ISOLATION

• INSTALL ACCESSORY ISOLATION

• INSTALL SPRING ISOLATION

Connect Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

• INSTALL WATER PIPING TO HEAT EXCHANGERS

• INSTALL VENT PIPING TO RELIEF VALVES

Make Electrical Connections . . . . . . . . . . . . . . . . . . . . 30

• GROUNDING THE CONTROLS/DRIVE ENCLOSURE

• INSTALLING INPUT POWER WIRING

• WIRING THE FIELD WIRING TERMINAL STRIPS

• CONNECT CONTROL INPUTS

• CONNECT CONTROL OUTPUTS

• CONNECT STARTER

COMPLETING THE INSTALLATION . . . . . . . . . . . 43-47

Checking the Installation . . . . . . . . . . . . . . . . . . . . . . . . 43

Oil Pump and Oil Heater . . . . . . . . . . . . . . . . . . . . . . . . . 43

Connect Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 43

Carrier Comfort Network Interface. . . . . . . . . . . . . . . 43

Lead-Lag Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . 44

Install Field Insulation and Lagging . . . . . . . . . . . . . 44

INSTALLATION START-UP REQUEST

CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1, CL-2

INSTALLATION

Receiving the Machine

INSPECT SHIPMENT

Do not open any valves or loosen any connections. The 23XRV machine may be shipped with a full refrigerant charge. Some machines may be shipped with a nitrogen holding charge as an option.

1. Inspect for shipping damage while machine is still on shipping conveyance. If machine appears to be damaged or has been torn loose from its anchorage, have it examined by transportation inspectors before removal. Forward claim papers directly to transportation company. Manufac-

turer is not responsible for any damage incurred in transit.

2. Check all items against shipping list. Immediately notify the nearest Carrier representative if any item is missing.

3. To prevent loss or damage, leave all parts in original packages until beginning installation. All openings are closed with covers or plugs to prevent dirt and debris from entering machine components during shipping. A full operating oil charge is placed in the oil sump before shipment.

IDENTIFY MACHINE (Fig. 1-4) — Refer to machine nameplate in Fig. 1. The machine model number, serial number, and heat exchanger sizes are stamped on the Refrigeration Machine nameplate located on the side of the VFD (variable frequency drive) enclosure. Check this information against shipping papers and job data.

INTRODUCTION

General —

wired, and leak tested. Installation (not by Carrier) consists primarily of establishing water and electrical services to the machine. The rigging, installation, field wiring, field piping, and insulation of waterbox covers are the responsibility of the contractor and/or customer. Carrier has no installation responsibilities for the equipment.

The 23XRV machine is factory assembled,

Job Data — Necessary information consists of:

• job contract or specifications

• machine location prints

• rigging information

• piping prints and details

• field wiring drawings

• starter manufacturer’s installation details

• Carrier certified print

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Fig. 1 — Refrigeration Machine Nameplate

23XRV – High Efficiency Variable Speed Screw Chiller

Cooler Size* 30-32 35-37

40-42 45-47 50-52 55-57

Condenser Size*

30-32 35-37

40-42

45-47 50-52 55-57

Economizer Option E – With Economizer N – No Economizer

R – Compressor

*First number denotes frame size.

†Maximum limits only. Additional application limits apply that may reduce these ampacities.

Motor Code P Q R

T U V

Fig. 2 — Model Number Identification

S – Special

Not Used

Voltage Code 3 – 380-3-60 4 – 416-3-60 5 – 460-3-60 9 – 400-3-50

Drive

Rectifier Max

Frame

Input Amps†

440

520

608

Max Motor Amps

265 283

306 334 368

421 440

Inverter Max Output Amps†

442 442 520 608

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Identifying the Drive by Part Number

— Each LiquiFlo™

2.0 AC drive can be identified by its part number. See Fig. 5. This number appears on the shipping label and on the VFD nameplate.

Drive Input Component Location

— Figure 6 identifies the

control center components. Identifying the Power Module by I.D. Number

— Each LiquiFlo 2.0 AC power module can be identified by its I.D. number. See Fig. 5. This number appears on the shipping label and on the power module’s nameplate. Power ratings are provided in Table 1.

INSTALLATION REQUIREMENTS — Certain requirements should be checked before continuing with the chiller’s electrical installation. Input power wire sizes, branch circuit protection, and control wiring are all areas that need to be evaluated.

Determining Wire Size Requirements

— Wire size should be determined based on the size of the conduit openings, and applicable local, national, and international codes (e.g., NEC [National Electric Code]/CEC [California Energy Commission] regulations). General recommendations are included in the Carrier field wiring drawing.

Conduit Entry Size

— It is important to determine the size of the conduit openings in the enclosure power entry plate so that the wire planned for a specific entry point will fit through the opening. Do NOT punch holes or drill into the top surface of the control center enclosure for field wiring. Do not punch holes or drill into the top surface of the control center enclosure for field wiring. Knockouts are provided in the back of the control center for field control wiring connections.

Recommended Control and Signal Wire Sizes

— The recommended minimum size wire to connect I/O signals to the control terminal blocks is 18 AWG (American Wire Gage). Recommended terminal tightening torque is 7 to 9 in.-lb (0.79 to 1.02 N-m).

Recommended Air Flow Clearances

— Be sure there is adequate clearance for air circulation around the enclosure. A 6-in. (152.4 mm) minimum clearance is required wherever vents are located in the VFD enclosure.

Match Power Module Input and Supply Power Ratings

— It is important to verify that building power will meet the input power requirements of the Machine Electrical Data nameplate

input power rating. Be sure the input power to the chiller corresponds to the chiller’s nameplate voltage, current, and frequency. Refer to machine nameplate in Fig. 7. The machine electrical data nameplate is located on the right side of the control center.

PROVIDE MACHINE PROTECTION — Protect machine and VFD enclosure from construction dirt and moisture. Keep protective shipping covers in place until machine is ready for installation.

If machine is exposed to freezing temperatures after water circuits have been installed, open waterbox drains and remove all water from cooler and condenser. Leave drains open until system is filled.

It is important to properly plan before installing a 23XRV unit to ensure that the environment and operating conditions are satisfactory. The installation must comply with all requirements in the certified prints.

Rigging the Machine — The 23XRV machine can be

rigged as an entire assembly. Large interconnecting piping has flanged connections that allow the compressor, cooler, and condenser sections to be separated and rigged individually. In addition, the VFD can be removed and rigged separately.

RIG MACHINE ASSEMBLY — See rigging instructions on label attached to machine. Also refer to rigging guide (Fig. 8), physical data in Fig. 9, and Tables 2-9B. Lift machine only from the points indicated in rigging guide. Each lifting cable or chain must be capable of supporting the entire weight of the machine.

Lifting machine from points other than those specified may result in serious damage to the unit and personal injury. Rigging equipment and procedures must be adequate for machine weight. See Fig. 8 for machine weights.

NOTE: These weights are broken down into component sections for use when installing the unit in sections. For the complete machine weight, add all component sections and refrigerant charge together. See Tables 5-9B for machine component weights.

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1—Motor Terminal Cover Plate 2—Variable Frequency Drive 3—International Chiller Visual Controller (ICVC) 4—Discharge Pipe Relief Valve 5—Condenser 6—Oil Reclaim Actuator 7—Vaporizer Sight Glass 8—Oil Filter Assembly (Hidden)

9—Vaporizer 10 — Oil Charging/Drain Valve 11 — Oil Sump 12 — Condenser Refrigerant Pumpout Valve 13 — Condenser Float Chamber 14 — Cooler Inlet Isolation Valve 15 — ASME Nameplate, Economizer (Hidden) 16 — Filter Drier 17 — Oil Sump Heater 18 — Condenser Supply/Return End Waterbox 19 — Cooler Supply/Return End Waterbox 20 — Motor Cooling Supply Line 21 — VFD Disconnect

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35 34

22 — Discharge Pipe 23 — Compressor Discharge Check Valve Access Cover 24 — Condenser Relief Valves 25 — Refrigerant Charging Valve 26 — Cooler Relief Valve 27 — Tubesheet Mounting Brackets 28 — Typical Waterbox Drain Coupling 29 — ASME Nameplate, Condenser 30 — Oil Pump 31 — Oil Pump Inlet Strainer 32 — Strainer Housing Sight Glass 33 — Discharge Isolation Valve (Option or Accessory) 34 — Refrigeration Machine Nameplate 35 — Machine Electrical Data Nameplate 36 — Oil Sump Sight Glass 37 — Filter Drier Isolation Valve with Schrader 38 — Economizer 39 — Motor Cooling Sight Glass 40 — Motor Cooling Isolation Valve 41 — Vaporizer Drain Sight Glass

42 — VFD Cold Plate Refrigeration Inlet Connection

(Outlet Hidden)

43 — VFD Cold Plate Solenoid 44 — Compressor Nameplate 45 — Compressor Lubrication Block 46 — Economizer Muffler 47 — Vaporizer Condenser Gas Isolation Valve 48 — Hot Gas Bypass Isolation and Trim Valve 49 — VFD Cooling Refrigerant Strainer 50 —

Cooler Refrigerant Pumpout Valve

51 — ASME Nameplate, Cooler

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Fig. 3 — Typical 23XRV Components

1—Condenser Pressure 2—Evaporator Pressure 3—Compressor Discharge Temperature 4—Compressor Discharge Pressure 5—Compressor Discharge High Pressure Switch 6—Compressor Motor Winding Temperature (Hidden) 7—Evaporator Refrigerant Liquid Temperature (Hidden) 8—Condenser Liquid Temperature 9—Condenser Liquid Flow (Optional)

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10 — Inductor Temperature Switch

(Inside VFD Enclosure)

11 — VFD Rectifier Temperature

(Inside Power Module)

12 — VFD Cold Plate Temperature

(Inside VFD Enclosure)

13 — VFD Inverter Temperature

(Inside Power Module)

14 — Humidity Sensor (Inside VFD Enclosure) 15 — Oil Pressure Leaving Filter (Hidden) 16 — Oil Sump Pressure (Hidden) 17 — Oil Sump Temperature (Hidden) 18 — Vaporizer Temperature 19 — Evaporator Liquid Temperature 20 — Evaporator Liquid Flow (Optional)

Fig. 4 — Typical 23XRV Installation (Sensor Locations)

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Fig. 5 — VFD Nameplate

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6 1

Fig. 6 — Control Center Components

9 1

1—Input Inductor Assembly 12 — Fuse, Class CC, 600V, 1A (3)

2—Capacitor Bank Assembly 13 — Transformer, 3kVA

3—Pre-Charge Resistor Assembly 14 — Line Sync PC Board Assembly

4—AC Contactor (3) 15 — Line Sync Board Cover

5—Power Module Assembly 16 — Fan, 115V (3)

6—Terminal Block, 10-Position (2) 17 — Circuit Breaker, 600V, 15A

7—Power Module Nameplate 18 — Circuit Breaker, 600V

8—Fuse Black, 30A, 600V, Class CC 19 — Lug, Ground, 2-600 MCM

9—Fuse, Class CC, 600V, 15A (2) 20 — Communications Interface Board

10 — Fuse, Class CC, 600V, 5A (1) 21 — Input Power Wiring Panel

11 — Fuse, Class CC, 600V, 20A (3)

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Fig. 7 — Machine Electrical Data Nameplate

HEAT EXHANGER

CODE

30-32 35-37 20,58914′ 7′- 8″ 13′-10″ 13′-5″ 12′-10″ 3′-11″ 3′- 8″ 40-42 23,928 12′ 6′-10″ 13′-6″ 12′-8″ 12′-3″ 4′-1″ 3′-11″ 45-47 25,167 14′ 7′- 8″ 13′-11″ 13′-2″ 12′- 8″ 4′-1″ 3′-11″ 50-52 26,950 12′ 6′-10″ 13′-10″ 12′-7″ 12′-9″ 4′-0″ 4′-4″ 55-57 28,479 14′ 7′- 8″ 14′-4″ 13′-1″ 13′-1″ 4′-0″ 4′-4″

*The 11th character of the chiller model number indicates the frame size of the compressor.

CHAIN “B” (SEE NOTE #2)

CHAIN “C” (SEE NOTE #2)

“E”

“F”

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COMPRESSOR

FRAME SIZE*

“A”

MAXIMUM WEIGHT

(lb)

19,18712′ 6′-10″ 13′-5″ 13′-0″ 12′-5″ 3′-11″ 3′- 8″

CHAIN “D” (SEE NOTE #2)

15´-0´´

MIN. HEIGHT ABOVE FLOOR

VESSEL LENGTH

DIM.

“A”

NOTES:

1. Each chain must be capable of supporting the entire weight of the machine. See chart for maximum weights.

2. Chain lengths shown are typical for 15′ lifting height. Some minor adjustments may be required.

CHAIN LENGTH

“B” “C” “D”

DIM.

“E”

MACHINE RIGGING GUIDE

DIM.

“F”

Fig. 8 — Machine Rigging Guide (Cooler Size 30 Through 57)

TUBE REMOVAL SPACE FOR EITHER END SIZES 30-32, 40-42, 50-52 12’-7½” (3848 mm) SIZES 35-37, 45-47, 55-57 14’-4” (4369 mm)

MOTOR SERVICE CLEARANCE 1’ - 10” (559 mm)

FRAME R COMPRESSOR 3’ - 0” (915mm) RECOMMENDED OVERHEAD SERVICE CLEARANCE

0’-3”

4’-10”

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0’-5”

SERVICE AREA

4’ - 10” MIN (1219 mm)

(WIDEST POINT)

Fig. 9 — 23XRV Dimensions (Refer to Tables 2 and 3)

Table 1 — Drive Assembly and Power Module Ratings

CARRIER PART NUMBER FRAME SIZE

ENCLOSURE

TYPE

INPUT

VOLTAGE (V)

RANGE 23XRA2AA_ _ _ _ _ _ _ _ _ _ _ Frame 2AA NEMA 1 380 to 460 440 442 23XRA2BA_ _ _ _ _ _ _ _ _ _ _ Frame 2BA NEMA 1 380 to 460 520 442 23XRA2BB_ _ _ _ _ _ _ _ _ _ _ Frame 2BB NEMA 1 380 to 460 520 520 23XRA2CC_ _ _ _ _ _ _ _ _ _ _ Frame 2CC NEMA 1 380 to 460 608 608

*110% output current capability for one minute, 150% output current for 5 seconds.

MAX INPUT

CURRENT

(AMPS)

CURRENT* at 4kHZ

2’ MIN (610 mm)

MAX OUTPUT

(AMPS)

Table 2 — 23XRV Dimensions (Nozzle-In-Head Waterbox)

HEAT EXCHANGER

SIZE

ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm

30 to 32 14- 3

35 to 37 15-11

40 to 42 14- 9 4496 14- 3

45 to 47 16- 5

50 to 52 14-10 4521 14- 4

55 to 57 16- 6

A (Length, with Nozzle-in-Head Waterbox)

1 Pass 2-Pass* 3 Pass†

4350 13- 81/

4870 15- 43/

5017 15-115/

5042 16- 1 4902 16- 3 4953 6-113/

4172 14- 31/

4693 15-113/

4347 14- 6 4420 6- 8½ 2045 7-6½ 2299

4867 16- 21/

4382 14- 61/

4350 6- 4 1930 7-25/

4870 6- 4 1930 7-25/

4940 6- 8½ 2045 7-6½ 2299

4432 6-113/

*Assumes both cooler and condenser nozzles on same end of chiller.

†1 or 3 pass length applies if either (or both) cooler or condenser is a 1 or 3 pass design. NOTES:

1. Service access should be provided per American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) 15, latest edition, National Fire Protection Association (NFPA) 70, and local safety code.

2. Allow at least 3 ft (915 mm) overhead clearance for service rigging for frame R compressor.

3. Certified drawings available upon request.

4. Marine waterboxes may add 6 in. to the width of the machine. See certified drawings for details.

5. ‘A’ length dimensions shown are for standard 150 psi design and victaulic connections. The 300 psi design and/or flanges will add length. See certified drawings.

6. Dished head waterbox covers not available for 3 pass design.

B (Width) C (Height)

2127 7-63/

2200

2305

Table 3 — 23XRV Dimensions (Marine Waterbox)

HEAT EXCHANGER

SIZE

30 to 32 14- 9 4496 16-4

35 to 37 16- 5

40 to 42 15- 2

45 to 47 16-11

50 to 52 15- 3

A (Length, Marine Waterbox — not shown)

2-Pass* 1 or 3 Pass†

ft-in. mm ft-in. mm ft-in. mm ft-in. mm

5017 18-11/

4642 16-81/

5163 18-43/

4661 16-81/

4997 6-93/

5518 6-93/

50866-9

5607 6-93/

5093 7-1 2159 7-63/

55 to 57 17- 0 518218-5 5613 7-1 2159 7-6

MAXIMUM

B WIDTH

2067 7-25/

2076 7-61/

*Assumes both cooler and condenser nozzles on same end of chiller.

†1 or 3 pass length applies if cooler is a 1 or 3 pass design. NOTES:

2. Allow at least 3 ft (915 mm) overhead clearance for service rigging for frame R compressor.

3. Certified drawings available upon request.

4. Marine waterboxes may add 6 in. to the width of the machine. See certified drawings for details.

5. ‘A’ length and ‘B’ width dimensions shown are for standard 150 psi design and victaulic connections. The 300 psi design and/ or flanges will add length. See certified drawings.

Table 4 — 23XRV Waterbox Nozzle Sizes

FRAME

SIZE

PRESSURE

psig (kPa)

150/300

(1034/2068)

150/300

(1034/2068)

150/300

(1034/2068)

PAS S

1 10 10 10.020 10.020 2 887.9817.981 3 6 6 6.065 6.065 1 10 10 10.020 10.020 2 887.9817.981 3 6 6 6.065 6.065 1 10 10 10.020 10.020 2 8 10 7.981 10.020 36 8 6.065 7.981

NOMINAL PIPE SIZE (in.) ACTUAL PIPE ID (in.)

Cooler Condenser Cooler Condenser

MAXIMUM C HEIGHT

2200

2299

2305

Table 5 — 23XRV Compressor Weights

MOTOR

CODE

P Q R S T U V

*Compressor weight is comprised of compressor, stator, rotor, and end bell.

ENGLISH SI

Total Compressor

Weight*

(lb)

4866 2207

Tot a l C o m pressor

Weight*

(kg)

Table 6 — 23XRV Component Weights — TR Compressor

FRAME 3

COMPONENT

HEAT EXCHANGER*

lb kg lb kg lb kg Suction Elbow 179 81 237 108 232 105 Discharge Pipe Assembly 747 339 747 339 747 339 Control Center 1650 749 1650 749 1650 749 Discharge Pipe Adapter Flange 17881178811788 Optional Isolation Valves 70 32 70 32 115 52 Optional Unit Mounted Pumpout Unit 164 75 164 75 164 75 Vaporizer Oil Sump 700 318 700 318 700 318 Economizer 542 246 542 246 542 246

*To determine compressor frame size, refer to Fig. 2.

FRAME 4

HEAT EXCHANGER*

FRAME 5

HEAT EXCHANGER*

Table 7 — 23XRV Heat Exchanger Data

ENGLISH SI

Dry Rigging Weight

Cooler

Only

(lb)*

Condenser

Only

With

Economizer

CODE

30 4148 3617 800 650 464 464 1877 1676 363 295 210 210 31 4330 3818800 650 531 542 1959 1769 363 295 241 246 32 4522 4023 800 650 601 621 2046 1860 363 295 273 282 35 4419 4529 910 760 511 513 2000 2089 413 345 232 233 36 4627 4758 910 760 587 602 2094 2195 413 345 266 273 37 4845 4992 910 760 667 692 2193 2299 413 345 303 314 40 5008 4962 900 750 863 915 2675 2746 408 340 391 415 41 5178 5155 900 750 930 995 2758 2839 408 340 422 451 42 5326 5347 900 750 990 1074 2832 2932 408 340 449 487 45 5463 5525 1015 8 65 938 998 2882 3001 460 392 425 453 46 5659 5747 1015 8 65 1014 1088 2976 3108 460 392 460 494 47 5830 5967 1015 865 1083 1179 3061 3214 460 392 491 535 50 5827 6013 1250 1100 1101 1225 3182 3304 567 499 499 556 51 6053 6206 1250 1100 1192 1304 3294 3397 567 499 541 591 52 6196 6387 1250 1100 1248 1379 3364 3485 567 499 566 626 55 6370 6708 1430 128 0 1201 1339 3429 3620 649 581 545 607 56 6631 6930 1430 1280 1304 1429 3556 3726 649 581 591 648 57 6795 7138 1430 128 0 1369 1514 3636 3826 649 581621687

*Rigging weights are for standard tubes of standard wall thickness (Turbo-B3 and Spikefin 2, 0.025-in. [0.635 mm] wall). NOTES:

1. Cooler includes the suction elbow and

2. Condenser includes float valve and sump, discharge stub-out, and

3. For special tubes refer to the 23XRV Computer Selection Program.

4. All weights for standard 2-pass NIH (nozzle-in-head) design with victaulic grooves.

Machine Charge

Refrigerant

Weight (lb)

Without

Economizer

/2 the distribution piping weight.

Liquid Weight

Cooler Condenser

(lb)

/2 the distribution piping weight.

Dry Rigging Weight

(kg)*

Cooler

Only

Condenser

Only

Refrigerant Weight (kg)

With

Economizer

Machine Charge

Without

Economizer

Liquid

Weight (kg)

Cooler Condenser

Table 8A — 23XRV Additional Data for Cooler Marine Waterboxes*

HEAT EXCHANGER

FRAME, PASS

FRAME 3, 1 AND 3 PASS 150 730 84 1034 331 318 FRAME 3, 2 PASS 150 365 42 1034 166 159 FRAME 4, 1 AND 3 PASS 150 1888 109 1034 856 413 FRAME 4, 2 PASS 150 944 54 1034 428 204 FRAME 5, 1 AND 3 PASS 150 2445 122 1034 1109 462 FRAME 5, 2 PASS 150 1223 61 1034 555 231 FRAME 3, 1 AND 3 PASS 300 860 84 2068 390 318 FRAME 3, 2 PASS 300 430 42 2068 195 159 FRAME 4, 1 AND 3 PASS 300 2162 109 2068 981413 FRAME 4, 2 PASS 300 1552 47 2068 704 178 FRAME 5, 1 AND 3 PASS 300 2655 122 2068 1204 462 FRAME 5, 2 PASS 300 1965 53 2068891 201

*Add to heat exchanger data for total weights or volumes. NOTES:

1. Weight adder shown is the same for cooler and condenser of equal frame size.

2. For the total weight of a vessel with a marine waterbox, add these values to the heat exchanger weights (or volume).

Psig

ENGLISH SI

Rigging Weight (lb) (see Note 2)

Water Volume

(gal)

kPa

Rigging Weight

(kg) (see Note 2)

Wate r Volume

(L)

Table 8B — 23XRV Additional Data for Condenser Marine Waterboxes*

HEAT EXCHANGER

FRAME, PASS

FRAME 3, 1 AND 3 PASS 150 N/A N/A 1034 N/A N/A FRAME 3, 2 PASS 150 365 42 1034 166 159 FRAME 4, 1 AND 3 PASS 150 N/A N/A 1034 N/A N/A FRAME 4, 2 PASS 150 989 54 1034 449 204 FRAME 5, 1 AND 3 PASS 150 N/A N/A 1034 N/A N/A FRAME 5, 2 PASS 150 1195 60 1034 542 227 FRAME 3, 1 AND 3 PASS 300 N/A N/A 2068 N/A N/A FRAME 3, 2 PASS 300 430 42 2068 195 159 FRAME 4, 1 AND 3 PASS 300 N/A N/A 2068 N/A N/A FRAME 4, 2 PASS 300 1641 47 2068 744 178 FRAME 5, 1 AND 3 PASS 300 N/A N/A 2068 N/A N/A FRAME 5, 2 PASS 300 1909 50 2068866 189

*Add to heat exchanger data for total weights or volumes. NOTES:

1. Weight adder shown is the same for cooler and condenser of equal frame size.

2. For the total weight of a vessel with a marine waterbox, add these values to the heat exchanger weights (or volume).

Psig

ENGLISH SI

Rigging Weight

(lb) (see Note 2)

Water Volume

(gal)

kPa

Rigging Weight

(kg) (see Note 2)

Table 9A — 23XRV Waterbox Cover Weights — English (lb)

Wate r Volume

(L)

WATERBOX

DESCRIPTION

NIH,1 pass Cover 150 PSIG 282318 148 185168 229 282318 148 185168 229 NIH,2 pass Cover 150 PSIG 28 NIH,3 pass Cover 150 PSIG 294 310 472 488 617 634 294 310 503 519 628 655 NIH Plain End, 150 PSIG 243 243 138 138 154 154 225 225 138 138 154 154 MWB End Cover, 150 PSIG* 243/315 243/315 138/314 138/314 154/390 154/390 225/234 225/234 138/314 138/314 154/390 154/390 NIH,1 pass Cover 300 PSIG 411 486633709764840 411 486633709764840 NIH,2 pass Cover 300 PSIG 411 518 626 733 760 867 411 578 622 729 727 8 78 NIH,3 pass Cover 300 PSIG 433 468 660 694 795 830 433 468 655 689785 8 38 NIH Plain End, 300 PSIG 291 291 522 522 658 658 270 270 522 522 658 658 MWB End Cover, 300 PSIG* 445/619 445/619 522/522 522/522 658/658 658/658 359/474 359/474 522/522 522/522 658/658 658/658

Frame 3 Frame 4 Frame 5 Frame 3 Frame 4 Frame 5

Victaulic Nozzles

Flanged

7 340 202 256 222 276 287340191245224298

COOLER CONDENSER

Victaulic Nozzles

Flanged

Victaulic Nozzles

Flanged

Victaulic Nozzles

Flanged

Victaulic Nozzles

Flanged

Victaulic Nozzles

Flanged

*Rows with two entries list nozzle end and return end weights.

Table 9B — 23XRV Waterbox Cover Weights — SI (kg)

COOLER CONDENSER

WATERBOX

DESCRIPTION

NIH,1 pass Cover 150 PSIG 128 144 67 84 76 104 128 144 67 84 76 104 NIH,2 pass Cover 150 PSIG 130 154 92 116 101 125 130 154 87 111 102 135 NIH,3 pass Cover 150 PSIG 133 141 214 221 280288 133 141 228 235 285 297 NIH Plain End, 150 PSIG 1101106363707010210263637070 MWB End Cover, 150 PSIG 110/143 110/143 63/142 63/142 70/177 70/177 102/106 102/106 63/142 63/142 70/177 70/177 NIH,1 pass Cover 300 PSIG 186220287 322 347 381186220287 322 346 381 NIH,2 pass Cover 300 PSIG 186235284 332 344 393 186235282 331 330 398 NIH,3 pass Cover 300 PSIG 196 212 299 315 361 376 196 212 297 313 356 380 NIH Plain End, 300 PSIG 132 132 237 237 298 298 122 122 237 237 298 298 MWB End Cover, 300 PSIG 202/281 202/281 237/237 237/237 298/298 298/298

LEGEND

NIH — Nozzle-in-Head MWB — Marine Waterbox

*Rows with two entries list nozzle end and return end weights. NOTE: Weight for NIH 2-pass cover, 150 psig (1034 kPa), is included in the heat exchanger weights shown in Table 7.

Frame 3 Frame 4 Frame 5 Frame 3 Frame 4 Frame 5

Victaulic

Nozzles

Flanged

Victaulic

Nozzles

Flanged

Victaulic

Nozzles

Flanged

Victaulic

Nozzles

163/215 163/215 237/237 237/237 298/298 298/298

Flanged

Victaulic

Nozzles

Flanged

Victaulic

Nozzles

Flanged

RIG MACHINE COMPONENTS — Refer to Fig. 10-26 and Carrier Certified Prints for machine component disassembly.

IMPORTANT: Only a qualified service technician should perform this operation.

Do not attempt to disconnect flanges while the machine is under pressure. Failure to relieve pressure can result in personal injury or damage to the unit.

Before rigging the compressor remove control panel and control center.

NOTE: Label each wire before removal when wiring must be disconnected (see Fig. 10 and 11). Clip all wire ties necessary when removing pressure and temperature sensors. Disconnect all pressure transducer wires at the sensor. Temperature sensors cannot be disconnected from their cables; remove temperature sensors from their thermowells and label as required.

CONDENSER

PRESSURE

CABLE

CABLE TRAY CONTAINING

VAPORIZER HTR CONDUIT

OIL HEATER CONDUIT

OIL PUMP CONDUIT

OIL SUMP TEMP. CABLE

OIL SUMP PRESS. CABLE

OIL PRESS. CABLE

OIL RECLAIM ACTUATOR CABLE

HGBP CONDUIT (OPTIONAL)

CONTROL

PA NE L

MOTOR TEMPERATURE

CABLE

a23-1558

WATER SENSOR CABLES FOR NOZZLE ARRANGEMENTS A,B,C,E,F,P,Q,R,T,&U (SAME FOR OTHER END OF MACHINE)

DISCHARGE END

DISCH. TEMP. CABLE DISCH. PRESS. CABLE DISCH. PRESS. SWITCH

COOLER PRESSURE CABLE

Fig. 10 — Electrical Cable Routing (Top View)

CABLE TRAY CONTAINING OIL VAPORIZER CONDUIT

OIL HTR CONDUIT

OIL PUMP CONDUIT

OIL RECLAIM ACTUATOR CABLE

OIL SUMP PRESS. CABLE

OIL DISCH. PRESS. CABLE

OIL SUMP TEMP. CABLE

HGBP CONDUIT (OPTIONAL)

COMR’R DISCH. TEMP. CABLE

DISCH. PRESS. SWITCH

DISCH. PRESS. CABLE

CABLE TRAY CONTAINING

ENT/LVG CHILLED LIQUID CABLES

ENT/LVG COND. LIQUID CABLES

COND, PRESS CABLE

COMP’R DISCH TEMP. CABLE

EVAP. PRESS. CABLE

EVAP. REFRIG. LIQUID TEMP. CABLE

MOTOR TEMP. CABLE

VFD COOLANT SOLENOID CABLE

OIL PRESS. CABLE

DISCH. PRESS. SWITCH CABLE

HGBP CONDUIT (OPTIONAL)

VFD COOLING

SOLENOID

CABLE

EVAP REFRIG. LIQUID

VFD COOLING

SOLENOID

TEMP. CABLE

SUCTION END

HGBP CONDUIT (OPTIONAL)

LEGEND

HGBP — Hot Gas Bypass HTR — Heater ENT/LVG — Entering/Leaving

MOTOR TEMP

CABLE

COMP’R DISCHARGE

TEMP. CABLE

DISCH. PRESS. CABLE

DISCH. PRESS. SWITCH

CONDENSER

PRESSURE

CABLE

EVAPORATOR

PRESSURE

CABLE

LEGEND

HGBP — Hot Gas Bypass HTR — Heater ENT/LVG— Entering/Leaving

DISCHARGE END

OIL PUMP

CONDUIT

OIL RECLAIM

ACTUATOR

CABLE

CABLE TRAY CONTAINING

VAPORIZER HEATER CONDUIT

OIL

PRESSURE

LEAVING

FILTER

CABLE

OIL SUMP

PRESSURE

CABLE

OIL SUMP

TEMPERATURE

CABLE

OIL HTR CONDUIT OIL PUMP CONDUIT OIL RECLAIM ACTUATOR CABLE OIL SUMP PRESS. CABLE OIL PRESS. CABLE OIL SUMP TEMP. CABLE HGBP CONDUIT (OPTIONAL)

Fig. 11 — Electrical Cable Routing (Back View)

EVAPORATOR REFRIG LIQUID TEMPERATURE SENS

OR CABLE

SUCTION END

OIL HEATER

CONDUIT

a23-1559

Separate Machine Components — The design of

the 23XRV allows for disassembly at the job site so that individual components may be moved through existing doorways. Use the following procedures to separate the machine components.

Suggested locations to cut piping will minimize the width of

the condenser/economizer assembly. SEPARATE COOLER AND CONDENSER

IMPORTANT: If the cooler and condenser vessels must be separated, the heat exchangers should be kept level by placing a support plate under the tube sheets. The support plate will also help to keep the vessels level and aligned when the vessels are bolted back together.

NOTE: For steps 1 through 13 refer to Fig. 12. The cooler has been removed from the picture to show the pipes and lines that must be cut.

Check that the holding charge has been removed from the chiller.

1. Place a support plate under each tube sheet to keep each vessel level.

2. Remove cooler relief valve and relief valve vent piping.

3. Cut the motor cooling refrigerant drain line.

4. Rig the suction elbow and disconnect the compressor suction line at the cooler and compressor. Remove bolts from the vaporizer vent line flange.

5. Cut the VFD cooling drain line.

6. Cut the oil reclaim line(s).

7. Cut the hot gas bypass line between the HGBP (hot gas bypass) solenoid valve and the cooler feed line.

8. Unbolt the cooler liquid feed line near the economizer or condenser float chamber at the flanged connection. Temporarily secure the in-line economizer orifice plate (economized chillers only) to the economizer flange (see Fig. 12).

a23-1560

1—Suction Elbow (Unbolt) 11 — VFD Cooling Drain Line 2—Vaporizer Vent Line (Unbolt) 12 — Oil Reclaim Line (Cut) 3—Motor Cooling Line (Unbolt) 13 — Vaporizer Hot Gas Return Line (Cut) 4—Motor Cooling Drain Line (Cut) 14 — Discharge Isolation Valve (Optional) 5—Tubesheet Mounting Bracket 15 — Condenser Relief Valves (Unscrew) 6—Bearing Oil Drain Line 16 — Discharge Temperature Sensor 7—Support Plate 17 — Discharge Pipe Assembly Relief Valve (Unscrew) 8—In-Line Economizer Orifice Plate 18 — Discharge Pressure Sensor 9—Cooler Liquid Feed LIne (Unbolt) 19 — Discharge Pressure Switch

10 — Hot Gas Bypass Line (Cut)

Fig. 12 — Cooler/Discharge Pipe Assembly Removal

9. Cut the vaporizer refrigerant return line as shown.

10. Disconnect all sensors with cables that cross from the condenser side of the machine to the cooler side including:

a. Evaporator refrigerant liquid temperature sensor.

See Fig. 13.

b. Entering and leaving chiller liquid temperature

sensors. See Fig. 14.

c. Evaporator pressure sensor.

11. Disconnect the tubesheet mounting brackets from the vessel connectors on the tube cooler tubesheet.

12. Cover all openings.

13. Rig the cooler away from the condenser/compressor.

NOTE: To reassemble, follow steps in reverse order. Connect sensors and cables after major components have been secured to reduce the risk damaging them.

OPTIONAL HOT GAS BYPASS LINE

Do not rig the condenser before the control center and compressor are removed. The condenser/compressor assembly has a high center of gravity and may tip over when lifted at the tubesheet rigging points, which could result in equipment damage and/or serious personal injury.

REMOVE THE CONTROLS/DRIVE ENCLOSURE FROM THE CONDENSER — Confirm that the power supply disconnect is open and all safety procedures are observed before removing the VFD. This procedure minimizes the number of sensors and cables that need to be disconnected.

Do not attempt to remove the VFD without first isolating the refrigerant charge in the condenser. Damage to one of the motor terminals during VFD removal will result in an uncontrolled refrigerant leak.

a23-1635

Fig. 13 — Evaporator Refrigerant Liquid

Temperature Sensor on Bottom of Cooler

LEAVING CONDENSER LIQUID TEMPERATURE SENSOR

EVAPORATOR REFRIGERANT LIQUID TEMPERATURE SENSOR

COOLER REFRIGERANT PUMPOUT VALV E

LEAVING CHILLED LIQUID TEMPERATURE SENSOR

1. Close the 2 filter drier isolation valves (Fig. 15) and the 2 VFD isolation valves. Isolate the refrigerant charge into the condenser to prevent a refrigerant leak if one of the motor terminals is accidentally damaged during VFD removal or installation. Evacuate the VFD coldplate through the Schrader valve (Fig. 15) on the VFD drain isolation valve.

2. Remove the shipping bracket between the VFD and the compressor if it is still in place. Remove any conduits that bring power to the VFD. See Fig. 16.

VFD REFRIGERANT COOLING SOLENOID VALV E

VFD REFRIGERANT COOLING ISOLATION VALV E

VFD REFRIGERANT STRAINER

FILTER DRIER ISOLATION VALVE

a23-1564

FILTER DRIER

MOTOR COOLING SIGHT GLASS

FILTER DRIER ISOLATION VALVE

SCHRADER VALV E

VFD DRAIN ISOLATION VALV E

ENTERING CONDENSER LIQUID TEMPERATURE SENSOR

Fig. 14 — Chiller End View

a23-1563

ENTERING CHILLED LIQUID TEMPERATURE SENSOR

Fig. 15 — VFD Refrigerant Isolation Valves

SHIPPING BRACKET

a23-1565

Fig. 16 — VFD Shipping Bracket

3. Remove the nuts that secure the terminal box transition piece to the motor housing.

4. Disconnect the motor leads from the motor terminals (Fig. 17). Note the position of the motor terminal cable lugs so they can be reinstalled with sufficient clearance away from surrounding structure.

5. Remove the motor temperature sensor leads (Fig. 17), the motor ground lead, and the bolts that secure the VFD enclosure to the terminal box transition piece.

6. Disconnect the communication cables from the back of the ICVC (Fig. 18).

7. Disconnect the high pressure switch leads from terminal strip TB1, terminals 15 and 16 (Fig. 19).

8. Unplug connectors CN1A, CN1B, CN2, and CN3 (Fig. 19).

9. Disconnect the control panel ground wire (Fig. 19) that is located next to connectors CN1A and CN1B.

10. Disconnect the VFD cooling lines (Fig. 20) and cover all openings.

11. Remove the 12 screws that secure the control panel to the VFD enclosure. Tilt the control panel away from the back of the control center.

12. Position the control panel on top of the condenser and secure it in place to prevent damage.

a23-1567

Fig. 18 — ICVC Communication Cables

CONTROL PANEL

CONNECTOR CN1A

GROUND WIRE

CONNECTOR CN1B

MOTOR TERMINALS

MOTOR TEMPERATURE SENSOR TERMINAL BLOCK

MOTOR TEMPERATURE CABLE

Fig. 17 — Motor Terminals

MOTOR TERMINAL BOX FRAME

a23-1566

CONNECTOR CN2

a23-1570

LOW VOLTAGE FIELD WIRING TERMINAL STRIP

CONNECTOR CN3

Fig. 19 — Control Panel Connectors

HIGH PRESSURE SWITCH CABLE

OIL HEATER CONDUIT ASY

3/4 IN. - 10 x 2 IN. LIFTING EYEBOLT WITH SHOULDER OR SWIVEL HOIST RING

6000 LB (2722 KG) WORKING LOAD LIMIT TYPICAL — CHICAGO HARDWARE P/N 28 GRAINGER P/N 5ZA63

OIL PUMP CONDUIT ASY

VAPORIZER HEATER CONDUIT ASY

VFD COOLING LINE O-RING FACE SEAL COUPLINGS

OIL RECLAIM ACTUATOR CABLE

VFD COOLING SOLENOID CABLE

a23-1571

TEMPERATURE SENSOR

PRESSURE SENSOR CABLES

CABLES

Fig. 20 — Control Panel Back

Lifting the Control Center

— Care should be used to prevent damage due to dropping or jolting when moving the control center. A fork truck or similar means of lifting and transporting may be used. Sling in a manner that will equalize the load at the pickup points. Use a spreader bar if the angle of the sling is less than 45 degrees relative to horizontal. Do not jolt while lifting.

Use the following procedure to lift the control center.

1. Remove the rubber hole plugs in the top of the control center and fully thread in 4 eyebolts or swivel hoist rings (see Fig. 21). Lifting hardware must have

/4 in.-10 x 2 in. long threads and must have a working load limit of at least 6000 lb (2722 kg). Typical eyebolts are Chicago Hardware (size 28) or Grainger (P/N 5ZA63).

2. Attach a sling to the four lifting eyebolts. Make certain that the angle of the sling is not less than 45 degrees relative to horizontal.

3. Using an overhead or portable hoist (minimum 2 ton rated capacity), attach a free-fall chain to the sling secured to the drive. Take up any slack in the chain.

4. Rig the control center and remove the bolts that secure it to the VFD mounting brackets on the condenser (see Fig. 21).

5. Confirm that welding procedures comply with local Pressure Vessel Codes before removing a portion of the VFD support bracket from the condenser. Custom brackets should be fabricated if part of the VFD supports must be cut off of the condenser to reduce the width of the condenser assembly. Clamp ¼-in. plates over both sides of the VFD bracket and drill two pairs of holes that

LIFTING

EYEBOLT

45° MIN

a23-1561

Fig. 21 — Control Center Lifting Points

straddle the line along which the VFD brackets will be cut. This will allow the VFD brackets to be reinstalled and welded in their original position.

NOTE: To reassemble, follow steps in reverse order. Connect sensors and cables after major components have been secured to reduce the risk damaging them. (See Fig. 22.)

REMOVE THE DISCHARGE PIPE ASSEMBLY FROM THE CONDENSER

NOTE: For steps 1 through 6 refer to Fig. 12. The condenser relief valve and relief valve vent piping should

be removed if they will interfere with discharge pipe assembly rigging.

1. Remove the discharge pipe assembly relief valve and relief valve vent piping.

2. Disconnect the compressor discharge temperature sensor.

3. Disconnect the compressor discharge pressure sensor and remove the high discharge pressure switch sensor.

4. Rig the discharge pipe assembly and remove the bolts from the compressor discharge and condenser inlet flange. Note the position and orientation of the discharge isolation valve on the condenser inlet flange.

5. Remove the discharge pipe assembly.

6. Cover all openings.

NOTE: To reassemble, follow steps in reverse order. Connect sensors and cables after major components have been secured to reduce the risk of damaging them.

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