Carrier 19XB User Manual

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19XB Positive Pressure Storage System 50/60 Hz

Installation, Operating, and Maintenance

Instructions

For Use With Positive Pressure Chillers

SAFETY CONSIDERATIONS

Positive pressure storage systems are designed to provide safe and reliable service when operated within design speci®cations. 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 this guide.

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

PROVIDE adequate ventilation in accordance with 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. 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.

NEVER EXCEED speci®ed test pressures, VERIFY the allowable test pressure by checking the instruction literature and the design pressures on the equipment nameplate.

DO NOT USE air for leak testing. Use only tracer gases and dry nitrogen.

DO NOT VALVE OFF any safety device.

BE SURE that all pressure relief devices are properly installed and functioning before operating any machine.

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 ¯ame produces toxic gases.

DO NOT USE eyebolts or eyebolt holes to rig machine sections or the entire assembly.

DO NOT work on high-voltageequipment unless you are a quali- ®ed 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 solidstate components.

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

DO NOT syphon refrigerant by mouth.

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 any enters the eyes, IMMEDIATELY FLUSH EYES with water and consult a physician.

NEVER APPLY an open ¯ame or live steam to a refrigerant cylinder. Dangerous overpressure can result. When necessary to heat refrigerant, use only warm (110 F [43 C]) water.

DO NOT REUSE disposable (nonreturnable) cylinders or attempt to re®ll 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 transferring refrigerant to the machine. The introduction of the wrong refrigerant can cause damage or malfunction to this machine.

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

DO NOT ATTEMPT TO REMOVE ®ttings, 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 devices, 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 device when corrosion or build-upof foreign material (rust, dirt, scale, etc.) is found within the valve body or mechanism. Replace the device.

DO NOT install relief devices in series or backwards.

USE CARE when working near or in line with a 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 cause personal injury and damage to the machine.

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 such equipment when there is a risk of slipping or losing your balance.

BE AWARE that certain automatic start arrangements CAN ENGAGE THE STARTER. Open the disconnect ahead of the starter in addition to shutting off the machine or pump.

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

DOUBLE-CHECKthat 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, ®ttings, and piping for corrosion, rust, leaks, or damage.

DO NOT MIX REFRIGERANT from chillers that use different compressor oils. Compressor damage can result.

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

Book

2

 

PC 211

Catalog No. 531-927

Printed in U.S.A.

Form 19XB-1SI

Pg 1

6-96

Replaces: New

Tab

5a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTENTS

Page

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

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

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10

Complete Pre-InstallationChecks. . . . . . . . . . . . . 2

·IDENTIFY UNIT

·INSPECT SHIPMENT

Mount the Pumpout Unit . . . . . . . . . . . . . . . . . . . . . 3

·MOUNTING ON THE CHILLER

·FLOOR MOUNTING

Rig the Storage Tank . . . . . . . . . . . . . . . . . . . . . . . . . 3

Make Piping Connections . . . . . . . . . . . . . . . . . . . . 7

· INSTALL VENT PIPING TO RELIEF DEVICES

Make Electrical Connections . . . . . . . . . . . . . . . . . . 7

CONTROLS AND COMPONENTS . . . . . . . . . . . . . . 11

Pumpout Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

·CONTROLS

·SAFETY CONTROL SETTINGS

·COMPRESSOR

·CONDENSER

·OIL SEPARATOR

·SUCTION AND DISCHARGE VALVES

Storage Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

·DRAIN VALVE

·DUAL RELIEF VALVES

·PRESSURE GAGE

·LEVEL GAGE

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-15

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

·REFRIGERANT TRANSFER

·TRANSFERRING LIQUID REFRIGERANT FROM THE CHILLER COOLER TO THE CHILLER CONDENSER OR PUMPOUT STORAGE TANK

·TRANSFERRING LIQUID REFRIGERANT FROM THE CHILLER CONDENSER OR PUMPOUT STORAGE TANK TO THE CHILLER COOLER

·DISTILLING THE REFRIGERANT

Pumpout and Refrigerant Transfer

Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

·OPERATING THE PUMPOUT UNIT

·TO READ REFRIGERANT PRESSURES

·POSITIVE PRESSURE CHILLERS WITH STORAGE TANKS

·CHILLERS WITH ISOLATION VALVES

·DISTILLING THE REFRIGERANT

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,16

Pumpout Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

· PUMPOUT COMPRESSOR OIL CHARGE

Storage Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Ordering Replacement Parts . . . . . . . . . . . . . . . . . 16

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 16

INTRODUCTION

The 19XB Positive Pressure Storage (PPS) System has been designed to help owners and operators of positive pressure chillers store refrigerants HCFC-22andHFC-134aduring service and repair work. The 19XB system conserves these refrigerants and prevents the release of excessive amounts of refrigerant into the atmosphere. The proper use of this equipment minimizes the loss of HFCs and HCFCs.

The 19XB PPS system shown in Fig. 1 consists of a pumpout unit mounted on a storage tank. The pumpout unit is offered as a free-standingunit that can be used with chillers that have an existing storage tank or with chillers that have isolation valves that permitbuilt-inrefrigerant storage.

The 19XB PPS systems are factory tested and certi®ed to the American Society of Mechanical Engineers (ASME) pressure vessel code. The tanks are constructed of certi®ed steel and are pressure rated at 300 psig (2068 kPa). The PPS storage tank is equipped with dual relief valves for proper venting per ASHRAE 15 (American Society of Heating Refrigeration, and Air Conditioning Engineers) guidelines. An automatic level switch is prewired to the control circuit to ensure proper storage levels.

The 19EA pumpout unit is a complete, hermetic, compact unit that consists of:

·a spring-mountedreciprocating compressor with a directdrive motor

·a water-cooledrefrigerant condenser

·an oil separator

·suction and discharge valves to control refrigerant ¯ow

·prewired safety and control devices.

When referencing refrigerant charges in this manual, the HCFC-22charge will be listed ®rst and theHFC-134avalue will follow in brackets.

INSTALLATION

Complete Pre-InstallationChecks

IDENTIFY UNIT Ð Identify the assembly number (Table 1) printed on the pumpout unit and storage tank nameplates. Check this information against the job requirements. Fig. 1 shows the PPS system and its major components. Refer to Tables 2 and 3 for physical data.

INSPECT SHIPMENT Ð Inspect unit for damage before removing unit from shipping conveyance. If unit appears damaged, it should be inspected by a shipping inspector before removal. File a claim with the shipping company if shipment is damaged or incomplete. The manufacturer is not responsible for damage incurred during transit.

Check all components. Notify the supplier immediately if any item is missing. To prevent loss or damage, leave all parts in their original package until they are needed.

2

Table 1 Ð Positive Pressure System Assembly Numbers

POSITIVE PRESSURE

PUMPOUT UNIT

 

COMPRESSOR MOTOR

MAXIMUM

 

STORAGE

SYSTEM ASSEMBLY

REFRIGERANT

LRA

ASSEMBLY NO.

(V-Ph-Hz)

RLA

TANK

NUMBER

 

 

 

 

 

 

 

 

19XB04280205

19EA42-748

R-22

208-3-60

13.2

63.5

28 cu ft

19XB04280206

19EA44-748

R-22

230-3-60

11.5

57.5

28 cu ft

19XB04280207

19EA46-748

R-22

400/460-3-50/60

5.8

28.8

28 cu ft

19XB04280208

19EA47-748

R-22

575-3-60

4.6

23.0

28 cu ft

19XB04280213

19EA48-748

R-134a

208-3-60

13.2

63.5

28 cu ft

19XB04280214

19EA49-748

R-134a

230-3-60

11.5

57.5

28 cu ft

19XB04280215

19EA51-748

R-134a

400/460-3-50/60

5.8

28.8

28 cu ft

19XB04280216

19EA52-748

R-134a

575-3-60

4.6

23.0

28 cu ft

19XB04280601

19EA42-748

R-22

208-3-60

13.2

63.5

None

19XB04280602

19EA44-748

R-22

230-3-60

11.5

57.5

None

19XB04280603

19EA46-748

R-22

400/460-3-50/60

5.8

28.8

None

19XB04280604

19EA47-748

R-22

575-3-60

4.6

23.0

None

19XB04280605

19EA48-658

R-134a

208-3-60

13.2

63.5

None

19XB04280606

19EA49-658

R-134a

230-3-60

11.5

57.5

None

19XB04280607

19EA51-658

R-134a

400/460-3-50/60

5.8

28.8

None

19XB04280608

19EA52-658

R-134a

575-3-60

4.6

23.0

None

19XB04520205

19EA42-748

R-22

208-3-60

13.2

63.5

52 cu ft

19XB04520206

19EA44-748

R-22

230-3-60

11.5

57.5

52 cu ft

19XB04520207

19EA46-748

R-22

400/460-3-50/60

5.8

28.8

52 cu ft

19XB04520208

19EA47-748

R-22

575-3-60

4.6

23.0

52 cu ft

19XB04520213

19EA48-748

R-134a

208-3-60

13.2

63.5

52 cu ft

19XB04520214

19EA49-748

R-134a

230-3-60

11.5

57.5

52 cu ft

19XB04520215

19EA51-748

R-134a

400/460-3-50/60

5.8

28.8

52 cu ft

19XB04520216

19EA52-748

R-134a

575-3-60

4.6

23.0

52 cu ft

 

 

 

 

 

 

 

LEGEND

LRA Ð Locked Rotor Amps

RLA Ð Rated Load Amps

NOTES:

1.All storage vessels are 300 psig (2068 kPa) designs per the ASME (American Society of Mechanical Engineers) Boiler Pressure Vessel Code, Section VIII Division 1.

2.All units above are shipped with a 15 psig (103 kPa) nitrogen charge.

3.Nominal horsepower for all pumpout units is 3.0.

Mount the Pumpout Unit Ð The pumpout unit, if purchased separately, may be mounted directly on the chiller or it may be ¯oor mounted.

MOUNTING ON THE CHILLER Ð See instructions provided with the chiller for mounting the pumpout unit. A typical chiller mount is shown in Fig. 2.

FLOOR MOUNTING Ð Select a ventilated and accessible area, free of traffic or other hazards. Remove and discard the 4 angle supports at the base of the pumpout unit and bolt the unit to the ¯oor through the 47¤16 in. holes at the base of the pumpout unit. Special isolation is unnecessary. Contact surface and dimensions for the pumpout unit are given in Fig. 3.

Rig the Storage Tank Ð The complete 19XB system can be rigged as a single assembly. See the rigging instructions on the label attached to the assembly. Also refer to the rigging guide (Fig. 4), physical data in Tables 2 and 3, and contact surface and dimensions for the complete system in Fig. 5.Lift the assembly only from the 4 points indicated in the rigging guide. Each rigging cable must be capable of supporting the entire weight of the assembly.

Lifting the assembly from points other than those speci- ®ed may result in serious damage to the assembly and personal injury. Rigging equipment and procedures must be adequate for assembly. See Tables 2 and 3 for weights. NOTE: These weights are broken down into pumpout unit and storage tank weights. For the complete assembly weight, add all components together.

3

VENT VALVE

VALVES

VALVES

CONTROL BOX

(WIRING BY

 

CONTRACTOR)

 

COMPRESSOR

CONDENSER

REFRIGERANT

WATER

INLET VALVE

CONNECTIONS

 

(FIELD PIPING)

 

19EA PUMPOUT UNIT

19EA CONTROL BOX (INTERIOR)

19EA PUMPOUT UNITS

Fig. 1 Ð 19XB Positive Pressure Storage System

4

*3¤8-16bolts ×1-in.lg; 4 required.

Fig. 2 Ð 19EA Pumpout Unit: Typical Chiller Mount

ELECTRICAL CONNECTION

OPTION LIST

TRADE SIZE

QTY

LOCATION

1¤2(

1

TOP

3¤4(

1

BOTTOM

1(

1

MIDDLE

11¤4(

1

MIDDLE

Fig. 3 Ð Pumpout Unit Contact Surfaces and Dimensions

5

NOTES:

1.Each chain must be capable of supporting the entire weight of the machine.

2.Minimum chain length:

28 ft3 tank Ð 108-0952 ft3 tank Ð 158-69

3.Total weight equals empty weight from chart and charge weight given on label.

STORAGE

CENTER OF GRAVITY

EMPTY WEIGHT

APPROX. DIM. Ð ft-in.(mm)

TANK SIZE

LB (Kg)

A

B

 

 

3

4- 51¤4

1-77¤8

2380

28 Ft

(1353)

(505)

(1080)

 

52 Ft3

6-101¤8

1-83¤4

3460

 

(2086)

(527)

(1569)

Fig. 4 Ð Rigging Guide

Table 2 Ð Physical Data

19EA Pumpout Unit

 

 

ENGLISH

(SI)

Pumpout Unit Weight*

lb (kg)

210

(95)

Pumpout Condenser Water Flow Rate

gpm (L/s)

5 to 7

(.32 to .44)

Pumpout Condenser Water Pressure Drop

psig (kPa)

6 to 10.7

(41.4 to 73.8)

Maximum Entering Condenser Water Temperature

F (C)

85

(29)

Maximum Leaving Condenser Water Temperature

F (C)

100

(37)

Condenser Relief Valve (Fusible Plug)

psig (kPa)

385

(2655)

Condenser Pressure Rating

 

 

 

Refrigerant Side

psig (kPa)

385

(2655)

Waterside

psig (kPa)

150

(1034)

Compressor Rating 1750 rpm (29 r/s) Reciprocating

cfm (L/s)

8.7

(.25)

Valves (4-ValveManifold, Copper with

in. OD

1¤2

1¤2

Brass Turn Knob Valves)

 

 

 

*The pumpout unit weight includes the compressor/condenser, control box, and the oil separator.

NOTES:

1.The motor is hermetic with thermal protection.

2.The control box is mounted and wired with a fuse on/off switch according to NEMA 1 (National Electrical Manufacturing Association).

3.The starter contactor is located in the control box. The overloads on the motor are wired and the disconnect switch is supplied by the customer.

4.The condenser tube is copper.

6

Table 3 Ð 19XB Storage Tank Rated Dry Weight and Refrigerant Capacity

English

 

 

 

TANK OD

 

DRY WEIGHT*

 

MAXIMUM REFRIGERANT CAPACITY (lb)

 

SIZE CODE

 

ASHRAE/ANSI 15

UL 1963

 

(in.)

 

(lb)

 

 

 

 

 

 

 

R-22

 

R-134a

R-22

 

R-134a

 

0428

 

24.00

 

2380

1842

 

1860

1704

 

1716

 

0452

 

27.25

 

3460

3527

 

3563

3264

 

3286

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TANK OD

 

DRY WEIGHT*

 

MAXIMUM REFRIGERANT CAPACITY (kg)

 

SIZE CODE

 

ASHRAE/ANSI 15

UL 1963

 

(mm)

 

(kg)

 

 

 

 

 

 

 

R-22

 

R-134a

R-22

 

R-134a

 

0428

 

610

 

1080

836

 

844

773

 

778

 

0452

 

592

 

1569

1600

 

1616

1481

 

1491

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

 

 

 

 

 

 

 

ANSI

Ð

American National Standards Institute

 

 

 

 

 

 

ASHRAE Ð American Society of Heating, Refrigeration,

 

 

 

 

 

 

 

 

and Air Conditioning Engineers

 

 

 

 

 

 

 

UL

Ð Underwriters' Laboratories

 

 

 

 

 

 

 

*The above dry weight includes the pumpout unit weight of 210 lbs (95 kg).

Make Piping Connections Ð Figure 6 represents typical pumpout unit/chiller piping connections. Standard connections for1¤2-in.OD copper tubing are provided. Install the®eld-suppliedFPT tee with pipe plug in the piping as shown in Fig. 6. This tee is used for refrigerant charging.

NOTE: If any ®eld piping runs exceed 50 ft in length, use 7¤8-in.OD copper tubing to minimize pressure drop.

Pumpout unit water piping connections are shown in Fig. 6. Both connections are 1¤2-in.NPT (female). A shutoff valve should be installed in the water line. Provide a means for blowing water from the condenser coil at winter shutdown to preventfreeze-updamage. Refer to the Job Data for water piping particulars.

INSTALL VENT PIPING TO RELIEF DEVICES Ð The pumpout storage tank is factory-equippedwith relief devices. Refer to Fig. 5 and Table 2 for size and location of the relief devices. Vent the relief devices to the outdoors in accordance with ANSI/ASHRAE 15 Safety Code (latest edition) for Mechanical Refrigeration and all other applicable codes. Relief devices are set to relieve at 300 psig (2068 kPa).

Refrigerant discharged into con®ned spaces can displace oxygen and cause asphyxiation.

1.If relief devices are manifolded, the cross-sectionalarea of the relief pipe must at least equal the sum of the areas required for individual relief pipes.

2.Provide a pipe plug near outlet side of each relief device for leak testing. Provide pipe ®ttings that allow vent piping to be disconnected periodically for inspection of valve mechanism.

3.Piping to relief devices must not apply stress to the device. Adequately support piping. A length of ¯exible tubing or piping near the device is essential on springisolated machines.

4.Cover the outdoor vent with a rain cap and place a condensation drain at the low point in the vent piping to prevent water build-upon the atmospheric side of the relief device.

Make Electrical Connections Ð See nameplate on compressor of pumpout unit and Table 1 for motor electrical data. Wire unit according to the diagram inside the control box.

Fig. 7 is the wiring schematic for a complete system that includes the 19XB storage tank and the pumpout unit. Fig. 8 is the wiring schematic for the pumpout unit. Use this schematic for installations that do not include an auxiliary pumpout storage tank.

NOTE: Use copper conductors only.

7

DIMENSIONS

ENGLISH (ft-in.)

TANK

 

A

B

C

D

E

F

G

H

J

K

L

M

N

P

R

S

T

SIZE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0428

10- 5

9-10

 

4-9

2-43¤4

 

1-23¤8

 

3-13¤16

 

4-11

 

3-81¤8

3- 8

2-97¤16

 

3-2

0-31¤2

4-83¤4

1-77¤8

 

1-75¤16

3-73¤4

 

5-01¤4

0452

14-111¤4

14-

41¤2

5-07¤8

2-81¤2

 

1-41¤4

 

3-47¤16

 

7- 21¤4

 

4-0

3-117¤8

3-15¤16

 

3-57¤8

0-33¤8

7-11¤2

1-83¤4

 

1-79¤16

3-8

 

5-01¤2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SI (mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TANK

 

A

B

 

C

D

 

E

 

F

 

G

 

H

J

K

 

L

M

 

N

P

 

R

 

S

 

T

SIZE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0428

 

3175

2997

 

1448

730

 

365

 

945

 

1499

 

1121

1118

849

 

965

89

 

1442

505

 

491

 

1111

 

1530

0452

 

4553

4382

 

1546

826

 

413

 

1027

 

2191

 

1219

1216

948

 

1064

86

 

2172

528

 

497

 

1118

 

1537

NOTES:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

 

Denotes center of gravity.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Dimensions in (

) are in millimeters.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.The weights and center of gravity values given are for an empty storage tank.

4.For additional information on the pumpout unit, see certi®ed drawings.

5.The available conduit knockout sizes are:

TRADE

QTY

LOCATION

SIZE

 

 

1¤2(

1

top

3¤4(

1

bottom

1(

1

middle

11¤4(

1

middle

Fig. 5 Ð PPS Contact Surface and Dimensions

8

CHILLERS WITHOUT ISOLATION VALVES

CHILLERS WITH ISOLATION VALVES

 

(WITH OR WITHOUT PUMPOUT STORAGE TANKS)

GENERAL PIPING CONNECTION SIZES

CONNECTION

 

SIZE (in.)

Refrigerant Transfer Connections

1¤2

ODS (female)

Condenser Water Cooling Connectors

1¤2

NPT (female)

Safety Relief Head Pumpdown Condenser

3¤8

Flare (male)

ODS Ð Outside Diameter, Sweat

NOTES:

1.The ®eld-suppliedtubing is tobe1¤2-in.OD tubing (min.) and must be arranged and supported to avoid stresses on the equipment, transmission of vibrations, and interference with routine access during the reading, adjusting, and servicing of the equipment. If the distance from the chiller to the pumpout unit is over 50 ft, then

7¤8-in.OD tubing (min.) must be used. Provisions should be made for adjustment in each plane of the tubing and for both periodic and major servicing of the equipment. Special care must be taken so that the safety head does not experience tubing strain. Vent the safety head per ASHRAE 15 (American Society of Heating, Refrigeration, and Air Conditioning Engineers), latest revision.

2.The tubing and valve from the storage tank to the pumpout compressor is factory supplied when the unit is factory mounted.

LEGEND

Factory-SuppliedTubing

Field-SuppliedTubing

Field-SuppliedTubing (Multiple Chillers)

Service Valve (Factory Supplied)

Service Valve (Field Supplied)

Fig. 6 Ð Typical Pumpout Unit/Chiller Connection Schematic

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Table 4 Ð Relief Devices

STORAGE

RELIEF VALVE

 

REQUIRED FACTOR

TANK SIZE

OUTLET SIZE

QUANTITY

lb air

Kg air

 

min

min

 

 

 

28

1 in. NPT

2

31.4

14.2

Female Connector

 

 

 

 

52

1 in. NPT

2

52.3

23.7

Female Connector

 

 

 

 

LEGEND

Ground

Field Wiring

Factory Wiring

Contactor Term.

Overload Term.

Pumpdown Term.

Pumpdown Comp'r.

Term.

Fig. 7 Ð 19XB Pumpout System Wiring Schematic

 

LEGEND

C

Ð Contactor

Fu

Ð Fuse, 3 Amps

HP

Ð High-PressureCutout

L

Ð Compressor Motor Voltage Line(3-phase)

LL

Ð Low-LineControl Voltage(single-phase)

OL

Ð Compressor Overload

T'stat

Ð Internal Thermostat

*Bimetal thermal protector imbedded in motor winding.

Compressor Terminal

Contactor Terminal

Overload Terminal

Pumpout Unit Terminal

Fig. 8 Ð Pumpout Unit Wiring Schematic

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