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19QA

Refrigerant Management System

50/60 Hz

Installation, Operating and Maintenance

Instructions

For Use With Low-Pressure Centrifugal Liquid Chillers

SAFETY CONSIDERATIONS

Refrigerant recovery devices are designed to provide safe

and reliable service when operated within design spec

ifications. When operating this equipment, use good judg

ment and safety precautions to avoid damage to equip

ment and property or injury to personnel.

Be sure you understand and follow the procedures and

safety precautions contained in this guide.

A DANGER

DO NOT VENT refrigerant relief valves within a building. Outlet

from rupture disc or relief valve must be vented outdoors in ac

cordance with the latest edition of ASHRAE 15 (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 ASHRAE 15,

especially for enclosed and low overhead spaces. Inhalation of

high concentrations of vapor is harmful and may cause heart ir

regularities, unconsciousness, or death. Misuse can be fatal. Va

por is heavier than air and reduces the amount of oxygen available

for breathing. Product causes eye and skin irritation. Decomposi

tion products are hazardous.

DO NOT USE OXYGEN to purge lines or to pressurize a ma

chine for any purpose. Oxygen gas reacts violently with oil, grease,

and other common substances.

NEVER EXCEED specified test pressures, VERIFY the allow

able test pressure by checking the instruction literature and the de

sign 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.

A WARNING

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 machine sections

or the entire assembly.

DO NOT work on high-voltage equipment unless you are a qual

ified electrician.

DO NOT WORK ON electrical components, including control pan

els, 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 de

energized before resuming work.

DO NOT siphon 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 flame or live steam to a refrigerant cyl

inder. 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 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

damage or malfunction to this machine.

Operation of this equipment with refrigerants other than those

cited herein should comply with ASHRAE-15 (latest edition). Con

tact 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 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 re

lief device when corrosion or build-up of foreign material (rust,

dirt, scale, etc.) is found within the valve body or mechanism.

Replace the device.

DO NOT install relief devices in series or backwards.

USE CARE when working near or in line with a compressed spring.

Sudden release of the spring can cause it and objects in its path to

act as projectiles.

A CAUTION

DO NOT STEP on refrigerant lines. Broken lines can whip about

and cause personal injury.

DO NOT climb over a machine. Use platform, catwalk, or stag

ing. Follow safe practices when using ladders.

USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to lift or

move inspection covers or other heavy components. Even if com

ponents are light, use such equipment when there is a risk of slip

ping or losing your balance.

BE AWARE that certain automatic start arrangements CAN EN

GAGE 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 require

ments of the original equipment.

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.

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

Book|2 |2 PC 221 Catalog No 531-963 Printed in U S A Form 19QA-2SI Pg 1 9-94 Replaces: 19QA-1 SI

Tab |5a|5d

1 2 3 4 5 6 ... 15 16

Summary of Contents

Page 1 - Instructions

19QARefrigerant Management System50/60 HzInstallation, Operating and MaintenanceInstructionsFor Use With Low-Pressure Centrifugal Liquid ChillersSAFET

Page 2

Refrigerant Vapor TransferA WARNINGIf the required vacuum level cannot be reached due to the presence of a large leak in the chiller,

Page 3 - Table 2 — Physical Data

DISCHARGEWATER CONNECTIONSRefrigerant Hose Water HoseDirect Coupled Connection Factory-Installed Copper TubingFig. 11 — Refrigerant Vapor Transfer/Eva

Page 4

Purge Separator Assembly — A purge separator assembly is used to remove noncondensable gases that may be mixed with the refrigerant

Page 5

Water Separation — Water is only slightly soluble in refrigerant. See Table 4. If additional water is present, it will float on to

Page 6 - Valves, and Fittings

Table 5 — Vapor PressureTEMPERATURECFC-11CFC-113HCFC-123PsiPsi kPakPaPsiPsikPakPaPsi Psi kPakPa°F°cGageAbsolute GageAbsolute GageAbsolute GageAbsolute

Page 7 - HEATER WIRING SCHEMATIC

MAINTENANCEPeriodic maintenance is necessary to keep all components functioning as designed. A maintenance log is recommended to en

Page 8

TROUBLESHOOTINGSYMPTOMPROBABLE CAUSEREMEDYUnit hums and vibrates excessiveiy.Motor/pump assembly out of alignment.Check alignment and adjust if necess

Page 9 - Typical 400 Ton Chiller

CONTENTSPageSAFETY CONSIDERATIONS ...1INTRODUCTION ...2INSTALL

Page 10 - A WARNING

Table 2 — Physical Data19QAENGLISHSISize020 030040Size020 030040DRY WEIGHT OF RMSlb 740841 942kg336382428DRY WEIGHT OF RSTlb495 546 586kg225 248 266TA

Page 11 - A CAUTION

UNITSIZEA BWEIGHTEMPTYMAXIMUM REFRIGERANT CHARGEACCESSORYCASTERSlbs kg lbskglbs kg19QA0204'-9"[1448]5'-4%''[1648]740 336 1600

Page 12 - Direct Coupled Connection

VAPORVALVEPRESSURE GAGERELIEF-VALVEASSEMBLY LEVEL GAGEUNITSIZEABWEIGHTEMPTYMAXIMUM REFRIGERANT CHARGEACCESSORYCASTERSlbskglbs kglbskg19QA0204'-9

Page 13 - Fig. 14 — Water Separation

NO. ITEM NO.1 — Pressure Gage 12 —2 — Purge Separator Assembly3 — Refrigerant (Vapor) In 13 —4 — Tube-in-Tube Condenser 14 —5 — Filter

Page 14 - Table 5 — Vapor Pressure

L2HUiH LEVEL SWITCHMOTOR WIRING SCHEMATICLlL2TOGGLESWITCHPRESSURESWITCH-ORN--WHT---^-------WHT-HEATER—— LAMPHEATER WIRING SCHEMATIC NOTE; The 115 and

Page 15 - SIDE VIEW END VIEW

CFC-11 or HCFC-123 CFC-113Ib(Kg)This graph is based on 70 F The following multipliers may be used to more accurately determine weights at temperatures

Page 16 - TROUBLESHOOTING

OPERATIONEvacuation — To minimize refrigerant loss, air must not be allowed to mix with the refrigerant vapor. All spaces that could

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Carrier 19QA User Manual

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