white 1090st-b cover 1-10-03

OPERATIONSand

MAINTENANCE

MANUAL

White®

1090ST™

RefrigerantRecovery/Recycle/Recharge

Unit

Table of ContentsSafety ................................................ 1Introduction ...................................... 8

Refrigerant Gases ........................................ 8Refrigerant Handling .......................... 9Refrigerant Safety .............................. 9Refrigerant Substitute Warning ........ 10

Refrigerant Oils .......................................... 10Refrigerant Oil Safety ...................... 10

Functional Description .............................. 11Front View ........................................ 11Back View ........................................ 12R-134a Accessories .......................... 13

Specifications ............................................ 13General ............................................ 13Operating .......................................... 13Storage ............................................ 13Capacities ........................................ 13

Installation and Operation ............ 14Connecting Service Hoses to the 1090ST™ Unit .......................................... 14Preparing and Installing Recovery Tank .... 14

Tank Preparation .............................. 15Power Up .................................................. 17Accessing Set-Up ...................................... 17

Adjusting LCD Contrast .................... 17Accessing Language ........................ 18Accessing Master Filter/Dryer Reset 18Accessing Units of Weight ................ 18

Operation .................................................. 18Preliminary Checks .......................... 19

Connecting Service Hoses to Vehicle ........ 20Recover/Recycle Refrigerant from Vehicle 20Purging Non-condensable Gas .................. 21Evacuating A/C System ............................ 21Charging A/C System ................................ 21Displaying Refrigerant Amount .................. 23

Tank Full/Empty ................................ 23Removing Recovery Tank .......................... 23Recovering Service Hoses ........................ 23Evacuating Contaminated Service Hoses .. 24Adding Refrigerant to the 1090ST™ Unit .......................................... 24Errors and Messages ................................ 25

Maintenance .................................. 26Equipment Tips ................................ 26

Master Filter/Dryer .................................... 26Changing the Master Filter/Dryer ...... 26Resetting Master Filter/Dryer Monitor 27

Maintaining the Vacuum Pump .................. 27

Checking Vacuum Pump Oil Level .... 27Adding Oil to Vacuum Pump .............. 27Changing Vacuum Pump Oil .............. 28

Storing the 1090ST™ Unit ........................ 28Troubleshooting .......................................... 29

Replacement Parts .......................... 31Optional Accessories ........................ 31

Table of IllustrationsIntroduction

Figure 1: Front View .................................. 11Figure 2: Back View .................................. 12Figure 3: Vacuum Pump Fill Port .............. 12Figure 4: R-134a Accessories .................. 13

Installation and OperationFigure 5: Recovery Tank and Temperature Probe .................................... 15

MaintenanceFigure 6: Master Filter/Dryer .................... 27Figure 7: Oil Level Sight Glass ................ 27Figure 8: Vacuum Pump Fill Cap .............. 28

Trademark Acknowledgements

White® is a registered trademark of White Industries.

1090ST™ is a trademark of WhiteIndustries.

Copyright Information1090ST™ User’s Manual ©2003 White

Industries.

All rights reserved.

The information, specifications and illustrations inthis manual are based on the latest information

available at the time of printing. WhiteIndustries® reserves the right to make changes

at any time without notice.

1

Safety Information

Safety NoticeFor your safety, read this manual thoroughlybefore operating your 1090ST™ unit.

Your 1090ST™ unit is intended for use byproperly trained, skilled professionalautomotive technicians. The safetymessages presented below and throughoutthis user's manual are reminders to theoperator to exercise care when using thisunit.

There are many variations in procedures,techniques, tools, and parts for servicingvehicles, as well as in the skill of theindividual doing the work. Because of thevast number of test applications andvariations in the products that can be testedwith this instrument, White Industries®cannot possibly anticipate or provide adviceor safety messages to cover every situation.It is the automotive techniciansresponsibility to be knowledgeable of thesystem that is to be tested. It is essential touse proper service methods and testprocedures and to perform tests in anappropriate and acceptable manner thatdoes not endanger your safety, the safety ofothers in the work area, the vehicle orequipment being tested.

It is assumed that the operator has athorough understanding of vehicle airconditioning systems before using this 1090ST™ unit. This understanding ofprinciples and operating theories isnecessary for competent, safe and accurateuse of this instrument.

Before using your 1090ST™ unit, alwaysrefer to and follow the safety messages andapplicable test procedures provided by themanufacturer of the vehicle or equipmentbeing tested.

Read All InstructionsRead, understand and follow all safetymessages and instructions in this manualand on the test equipment. Safetymessages in this section of the manualcontain a signal word with a three-partmessage and, in some instances, an icon.

The signal word indicates the level of thehazard in a situation.

DANGERIndicates an imminently hazardous situationwhich, if not avoided, will result in death orserious injury to the operator or tobystanders.

WARNINGIndicates a potentially hazardous situationwhich, if not avoided, could result in deathor serious injury to the operator or tobystanders.

CAUTIONIndicates a potentially hazardous situationwhich, if not avoided, may result inmoderate or minor injury to the operator orto bystanders.

IMPORTANTIndicates a situation which, if not avoided,may result in damage to the test equipmentor vehicle.

Safety messages in this section containthree different type styles• Normal type states the hazard.• Bold type states how to avoid the

hazard.• Italic type states the possible

consequences of not avoiding the hazard.

An icon, when present, gives a graphicaldescription of the potential hazard.

2

Safety Information

IMPORTANT SAFETYINSTRUCTIONS

WARNINGRisk of a lack of oxygen.— Vehicle exhaust gases contain carbon

monoxide.— Refrigerant gas can displace air in work

area.• Use your 1090ST™ unit in locations

with mechanical ventilation providingat least four air changes per hour.

Impairment of breathing can cause injury.

Power

WARNING

Risk of electric shock and fire.• To avoid electric shock the power cord

must be connected to a properlygrounded A.C. outlet.

• Do not remove or bypass thegrounding pin.

• Use the proper A.C. outlet for the unitto operate correctly. See the ID plateon the back of the unit.

• Extension cords are not recommended.If an extension cord must be used,use:— 16 AWG for cords up to 50', and— 14 AWG for cords greater than 50'

but less than 100'.• Do not use on wet surfaces or expose

to rain.• Use only fuses with the rating

specified near the fuse holder.Electric shock and fire can cause injury.

Refrigerant

WARNING

Risk of expelling refrigerant under pressure.• Wear safety goggles and protective

gloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses. Ifany refrigerant gets into the eyes,flush with water and seek a doctor'said immediately, even though irritationmay cease.

• Do not remove master filter/dryer whileunder pressure. Follow instructionsfor removing master filter/dryer. Foradditional information refer toChanging the Master Filter/Dryer.

• Prevent refrigerant from contacting theskin.

Expelled refrigerant can cause injury.

WARNING

Risk of explosion.• Do not use compressed shop air for

leak detection or to pressure test asystem containing refrigerant.Refrigerant can form combustiblemixtures at pressures aboveatmospheric and with airconcentrations greater than 60% byvolume.

• Do not heat a container of refrigerantabove 125°F (52°C).

Explosion can cause injury.

WARNING

Risk of fire.• Do not use this equipment in the

vicinity of spilled or opened containersof gasoline.

• Do not use your 1090ST™ unit or anyleak detector equipment if R-12substitutes are suspected. R-12refrigerant substitutes may beflammable.

Fire can cause injury.

3

Safety Information

WARNINGRisk of poison.• Avoid breathing air conditioning

refrigerant and lubricant vapor or mist.• Do not allow refrigerant to contact

open flame or be drawn into a runningengine. This can cause refrigerant tobecome poisonous phosgene gas.

• Use your 1090ST™ unit to removerefrigerant from air conditioningsystems.

Exposure can irritate eyes, nose and throat.

CAUTIONRisk of irritation to mucous membranes.Avoid breathing air conditioningrefrigerant and lubricant vapor or mist.Exposure may irritate eyes, nose andthroat. To remove HFC-134a from the A/Csystem, use service equipment certifiedto meet the requirements of SAE J2210(HFC-134a Recycling Equipment).Additional health and safety informationmay be obtained from the refrigerant andlubricant manufacturers.Exposure can irritate eyes, nose and throat.

Oil (Lubricant)

WARNING

Risk of expelling oil under pressure.Wear safety goggles and protectivegloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses. Ifany oil gets into the eyes, flush withwater and seek a doctor's aidimmediately, even though irritation maycease.Expelled oil can cause injury.

General

WARNING

Engine systems can malfunction expellingfuel, oil vapors, hot steam, hot toxic exhaustgases, acid, refrigerant and other debris.• Wear safety goggles and protective

gloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses.

• Service should be performed by acertified A/C service technician.

Engine systems that malfunction can causeinjury.

WARNING

The engine compartment contains electricalconnections and hot or moving parts.• Keep yourself, test leads, clothing and

other objects clear of electricalconnections and hot or moving engineparts.

• Do not place test equipment or toolson fenders or other places in theengine compartment.

• Barriers are recommended to helpidentify danger zones in test area.

• Prevent personnel from walkingthrough immediate test area.

Contact with electrical connections and hotor moving parts can cause injury.

WARNING

Service hoses can not withstand hightemperatures or severe mechanical stress.Keep the service hoses away from hot ormoving engine parts.Service hoses can split or burst causinginjury.

4

Safety Information

WARNING

Risk of explosion if improper tank is used.Do not use any tank with this equipmentother than part number EAA0275L05A.These tanks are D.O.T. certified forrefilling. D.O.T certified tanks aremarked "D.O.T. 4BA 350" or "D.O.T. 4BA400".Explosion can cause injury.

WARNING

Removing tubing assemblies may dischargerefrigerant.Wear safety goggles and protectivegloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses.Expelled refrigerant may cause injury.

WARNINGA test vehicle may move if not properlyprepared.• Block the drive wheels before

performing a test with the enginerunning. Unless instructed otherwise,set the parking brake and put the gearselector in neutral (manualtransmission) or park (automatictransmission). If the vehicle has anautomatic parking brake release,disconnect the release mechanism fortesting and reconnect it when testingis completed.

• Do not leave a running engineunattended.

A moving vehicle can cause injury.

WARNING

Risk of explosion.• Some vehicle fuel systems such as

Mercedes, light trucks, and some Fiatmodels have the same service fittingsas the A/C systems.

• Do not connect to similar fuel servicefittings.

• Connect only to A/C service fittings.If you mistakenly connect to fuel system:• Do not use any switches as this may

cause sparks.• Do not move any metal items as this

may cause sparks.• Unplug unit’s power cord from the wall

outlet.• Immediately ventilate the work area

and call your local servicerepresentative.

Fuel in A/C recovery unit can explode andcause injury.

CAUTIONRisk of injury.• This equipment should be operated by

qualified personnel only.• Use this equipment only as described

in this manual. Use only themanufacturer’s recommendedattachments.

• Do not operate equipment with adamaged cord or if the equipment hasbeen dropped or damaged, until it hasbeen examined by a qualified servicerepresentative. Care should be takento arrange the power cord so that itwill not be tripped over or pulled.

• Always unplug equipment fromelectrical outlet when not in use.Never use the cord to pull the plugfrom the outlet. Grasp the plug andpull to disconnect.

• Let the equipment cool completelybefore putting it away. Loop the powercord loosely in proper location whenstoring.

Operation of your 1090ST™ unit by anyoneother than qualified personnel may result ininjury.

5

Using This Manual

CAUTIONRisk of refrigerant leakage.Always close the quick coupler valvesbefore disconnecting a hose coupling.Loosened hose couplings can leakrefrigerant into the atmosphere.

CAUTIONMisdiagnosis may lead to incorrect orimproper repair and/or adjustment.Do not rely on erratic, questionable, orobviously erroneous test information orresults. If test information or results areerratic, questionable, or obviouslyerroneous, make sure that allconnections are correct and that the testprocedure was performed correctly.Refer also to theMaintenance/Troubleshooting sectionand perform tests and make repairs asrequired. If test information or resultsare still suspicious, do not use them fordiagnosis. Contact your WhiteIndustries® Representative.Improper repair and/or adjustment maycause vehicle or equipment damage orunsafe operation.

SAVE THESEINSTRUCTIONS

Using This ManualThis manual contains instructions for useand set-up of your 1090ST™ unit. A tableof contents and table of illustrations areprovided to make this manual easy to use.

Some of the information shown in text orillustrations is obtained using optionalequipment. A White Industries® SalesRepresentative can determine optionavailability.

ConventionsThis section contains a list of conventionsused in text.

Service Hose Couplers and PanelValves

References in text to opening and closingthe service hose couplers assume:• Counterclockwise closes the valves, and• Clockwise opens the valves.

References in text to opening and closingthe panel valves assume:• Valve pointed up closes the service hose

passage, and• Valve pointed to the left or right opens the

service hose passage.

Check NoteA check note provides additional informationabout the subject in the precedingparagraph.

Example:

✓✓✓✓ For additional information refer toConnecting Service Hoses to the1090ST™ Unit and ConnectingService Hoses to Vehicle.

6

Using This Manual

Equipment TipsEquipment tips provide information thatapplies to specific equipment. Each tip isintroduced by this icon ❐ for easyidentification.

Example:

❐ Never attempt to change a recoverytank during unit operation. Foradditional information refer to RemovingRecovery Tank.

Equipment DamageSituations arise during testing that coulddamage the vehicle or the test equipment.The word IMPORTANT signals thesesituations.

Example:

IMPORTANTFailure to follow these instructions coulddamage the compressor.

Safety MessagesSafety messages are provided to helpprevent personal injury and equipmentdamage. All safety messages areintroduced by a signal word indicating thehazard level. The types of safety messagesare:

DANGERIndicates an imminently hazardoussituation which, if not avoided, will resultin death or serious injury to the operatoror to bystanders.

WARNINGIndicates a potentially hazardoussituation which, if not avoided, couldresult in death or serious injury to theoperator or to bystanders.

CAUTIONIndicates a potentially hazardoussituation which, if not avoided, mayresult in moderate or minor injury to theoperator or to bystanders.

Some safety messages also contain visualsymbols with signal words.

Example:

WARNING

Engine systems can malfunction expellingfuel, oil vapors, hot steam, hot toxic exhaustgases, acid, refrigerant and other debris.Wear safety goggles and protectivegloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses.Engine systems that malfunction can causeinjury.

TermsUse the following definitions as a foundationto help understand your 1090ST™ unit’sprocesses and/or components.

Virgin TankA refrigerant tank, disposable or refillable,that contains new refrigerant. When empty,a disposable virgin tank must be evacuatedand cannot be refilled. Dispose of thisevacuated tank in accordance with local,state and federal regulations that apply inyour area. A refillable virgin tank should bereturned to your supplier.

Recovery TankA refrigerant tank designed to storerefrigerant removed from a virgin tank orrecovered from a vehicle. On your 1090ST™ unit, refrigerant is filtered anddried before reaching the recovery tank.Once in the recovery tank, it is ready forreuse.

RecoverThe process of removing refrigerant from asystem to prevent release of refrigerant intothe atmosphere. On your 1090ST™ unit,this process also recycles the refrigerant forreuse.

RecycleThe process of removing refrigerant from asystem, filtering, drying and storing it in therecovery tank.

7

Using This Manual

✓✓✓✓ Your 1090ST™ unit is a singlepass unit. This means refrigerantis filtered and dried beforereaching the recovery tank. Oncein the recovery tank, it is ready forreuse. There is no separate"recycle" process to perform.

EvacuateThe process of drawing a vacuum on arefrigerant system to remove air andmoisture. On your 1090ST™ unit, thisprocess is known as vacuum.

ChargeThe process of filling an air conditioningsystem with refrigerant.

PurgingThe process of bleeding off non-condensable gases from the recovery tank.

Stable ScaleThe situation where the reading from therefrigerant weight measuring device issteady. Moving your 1090ST™ unit causesthe liquid refrigerant to slosh around in therecovery tank, resulting in an unsteadyscale reading. Avoid moving your 1090ST™unit before taking scale readings.

Panel Valves and Symbols

✓✓✓✓ Never open panel valves untilprompted by the LCD display.

OFF Low-SideLeft panel valve pointed towards this symbolindicates the blue, low-side service hosepassage is closed to unit operations whilestill registering vehicle A/C system pressureon the gauge.

CHARGE Low-Side Left panel valve pointed towards this symbolindicates refrigerant being charged throughthe low-side service hose.

RECOVER/VACUUM Low-Side Left panel valve pointed towards this symbolindicates system being recovered orevacuated through the low-side servicehose.

OFF High-SideRight panel valve pointed towards thissymbol indicates red, high-side service hosepassage is closed to unit operations whilestill registering vehicle A/C system pressureon the gauge.

CHARGE High-Side Right panel valve pointed towards thissymbol indicates refrigerant being chargedthrough the high-side service hose.

RECOVER/VACUUM High-Side Right panel valve pointed towards thissymbol indicates system being recovered orevacuated through the high-side servicehose.

8

Introduction

IntroductionUse your 1090ST™ unit on automotive airconditioning systems to:— Recover,

• Remove refrigerant from vehicle,— Recycle,

• Filter, dry and store recoveredrefrigerant in a refillable tank,

— Evacuate, • Remove air and moisture from air

conditioning system using a vacuumto draw the system into a deepvacuum, and

— Recharge,• Refill the air conditioning system with

a specified amount of refrigerant.

Your 1090ST™ unit is a single pass design.This means recovered refrigerant is filteredand dried before entering the recovery tank.Refrigerant in the tank is always ready foruse. Refer to Recovering Refrigerant FromVehicle. There is no need to perform aseparate recycle function. Recover,evacuate and recharge functions areperformed semi-automatically.

This manual applies to the following1090ST™ models:

Model Number Refrigerant Type VoltageEEAC721A R-134a 120 VAC(w/vacuum pump) 60 cyclesEEAC722A R-134a 230 VAC(w/vacuum pump) 50 cycles

✓✓✓✓ WARRANTY IS VOID IF:— Refrigerant other than R-134a

is recycled, or— Refrigerant oil other than PAG,

ESTHER or POE is recycled.

Your 1090ST™ unit includes:• A Liquid Crystal Display (LCD) and four

buttons to control operation,• Integral gauge set and manual control

valves with service hoses, fittings, andadapters,

• A 50 pound capacity recovery tank andelectronic scale,

• Master filter/dryer with automaticreplacement reminder,

• An oil drain bottle, and• An oil injection bottle.

✓✓✓✓ The recovery tank is temperature-monitored to maintain accuratepurging of non-condensable gasesunder all conditions.

Refrigerant GasesHalogens are any of the five elements(fluorine, chlorine, bromine, iodine andastatine) that form part of group 7a of thePeriodic Table of Elements. The fluorineand chlorine elements of this family areused to create a methane organiccompound used to formdichlorodifluoromethane (CCL2F2 ), ahalogenated hydrocarbon called CFC-12(chlorofluorocarbon 12). This refrigerantgas is commonly known as Refrigerant-12,or R-12, and has been used as a refrigerantin mobile air conditioning systems for manyyears.

The new refrigerant in the halogenatedhydrocarbon family, HFC-134a (CH2FCF3 ),or R-134a, is now being incorporated inmobile air conditioning systems. HFCstands for hydrofluorocarbon.

The environmental impact of mobile airconditioning refrigerant containing chlorine(R-12) has caused regulatory action that willeventually eliminate the use of suchproducts. Regulatory action is necessarybecause when the chlorine content in R-12is exposed to the atmosphere:• It depletes the protective ozone layer in

the atmosphere,• It has relatively high global warming

potential, and• Its long atmospheric lifetime is

approximately 120 years.

9

Introduction

R-134a has been developed for new vehicleproduction but does not replace or directlysubstitute for R-12 in existing vehicles. R-134a does not contain chlorine, does notdeplete the ozone layer in the atmosphereand has an atmospheric lifetime of about15.5 years.

Environmental Protection Agency (EPA) andstate regulations specify that:• Provisions be made to certify all air

conditioning service, installation andrepair personnel,

• Refrigerant be recovered, recycled orreclaimed from automotive airconditioning systems, instead of allowingvapors to be expelled, or vented, into theatmosphere, and

• Refrigerant be recycled and reused, orproperly disposed of, instead of allowingvapors to be expelled, or vented, into theatmosphere.

Mobile air conditioning service, installationand repair technicians must be qualified andcertified.

Refrigerant HandlingMobile air conditioning systems containchemical mixtures that require specialhandling to avoid injury and to avoid ventingrefrigerant into the atmosphere.

Do not discharge any refrigerant gas, vaporor liquid from a refrigeration system into theatmosphere. If service is required thatinvolves opening the refrigerant system, usea certified recovery system.

Refrigerant SafetyWARNING

• Wear safety goggles and protectivegloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses. Ifany refrigerant gets into the eyes,flush with water and seek a doctor'said immediately, even though irritationmay cease.

• Do not remove master filter/dryer whileunder pressure. Follow instructionsfor removing master filter/dryer. Foradditional information refer toChanging the Master Filter/Dryer.


• Read, understand and follow SafetyInformation in the front of this manual.

WARNING• Use your 1090ST™ unit in locations

with mechanical ventilation providingat least four air changes per hour.

• Avoid breathing air conditioningrefrigerant and lubricant vapor or mist.

• Do not allow refrigerant to contactopen flame or be drawn into a runningengine. This can cause refrigerant tobecome poisonous phosgene gas.

• Use your 1090ST™ unit to removerefrigerant from air conditioningsystems.


IMPORTANT• Tighten all connections properly.

Insufficient or excessive torque canresult in loose joints or deformedparts. Either condition can result inrefrigerant leakage.

10

Introduction

Refrigerant SubstituteWarning

WARNING



Aftermarket R-12 refrigerant substitutes arebeing sold that are dangerous or potentiallyflammable gases. These products contain ablend of butane, isobutane and propane andhave the potential for explosion. Some ofthese products are:• OZ-12,• Refrigerant-176,• Arctic Chill R-176, and• GHG Refrigerant 12.

Some vehicles using OZ-12 can beidentified by a label that may be placed inthe engine compartment, but many cannotbe identified. Studies are currently beingconducted to develop a procedure to identifythe type of refrigerant in a refrigerantsystem. State agencies and theEnvironmental Protection Agency (EPA) aremoving to ban flammable substitutes.

If it is suspected that a refrigerant systemcontains a product of this type:• Question the customer about previous

service,• Be aware of any unfamiliar odor from the

system,• Do not use any leak detector equipment,• Do not use recycling equipment, and• Contact your state fire marshall or local

EPA office.

Refrigerant OilsIn mobile air conditioning units, the lubricantneeded for the compressor is blended withthe refrigerant. Mineral (petroleum) oilswere used with R-12 systems. Mineral oilsare not soluble in R-134a and the industryhad to substitute synthetic lubricating fluidsfor the mineral oils. Polyalkylene glycol oils(PAGs) were the first synthetics to meet theauto A/C compressor manufacturersperformance criteria, and most automakersand compressor manufacturers devised theirretrofit specifications with PAGs in mind.Since then, polyol ester oils (ESTERS orPOEs) have been tested and also havebeen found to meet the performancecriteria. Although POEs have not beenapproved by the automakers or A/Ccompressor manufacturers, POEs arefrequently used in A/C retrofits in theautomotive aftermarket.

Refrigerant Oil SafetyWARNING

Risk of irritation of mucous membranes.• Wear safety goggles and protective


• Avoid breathing A/C refrigerant andlubricant vapor or mist. Exposure mayirritate eyes, nose and throat. Toremove HFC-134a from the A/C system,use service equipment certified tomeet the requirements of SAE J2210(HFC-134a Recycling Equipment).Additional health and safetyinformation may be obtained fromrefrigerant and lubricantmanufacturers.

Exposure can irritate eyes, nose and throat.

11

Introduction

FunctionalDescriptionFront View

Figure 1: Front View

✓✓ DO NOT lift the 1090ST™ unit bytop plastic cover.

A – Integral Gauge SetHigh and low pressure, panel mountedgauge set for monitoring vehicle A/C systempressures.

B – Control PanelHouses display screen, indicator light andcontrol buttons.

C – LED Light• Lights when the unit is first turned ON,• Lights to indicate end of evacuation, and• Blinks to indicate error conditions.

D – Liquid Crystal Display (LCD) ScreenDisplays alpha-numeric information and keylabels. Shows charged, recovered amountsor chargeable weight of the recovery tank.Also indicates software version, “Tank Full”,and “Tank Empty” conditions.

E – Control ButtonsFour buttons are used to enter informationand control the 1090ST™ system operation:• UP and DOWN buttons are used to select

menu options on the screen.• Two buttons with variable functions

depending on the screen display.

F – Two Panel ValvesUsed to select OFF, CHARGE, orRECOVER/VACUUM. Right panel valveopens and closes the high-side servicehose passage to your 1090ST™ unit. Leftpanel valve opens and closes the low-sideservice hose passage to your 1090ST™ unit.

G – Oil Injection Bottle with Button (left side) Used to inject oil back into the vehicle A/Csystem.

H – Oil Drain Bottle (right side) Used to measure the amount of recoveredoil.

12

Introduction

Back View

Figure 2: Back View

A – Master Filter/Dryer Consists of a 10 micron particulate filter anddesiccant to remove moisture. Foradditional information refer to Changing theMaster Filter/Dryer.

B – Vacuum Pump Oil Level Sight GlassVacuum pump oil level should be in themiddle of the sight glass.

C – Vacuum Pump Oil Drain

D – Service Port, High-SideFor connecting to high pressure side ofvehicle A/C system.

Service Port, Low-SideFor connecting to low pressure side ofvehicle A/C system.

E – Recovery TankHolds refrigerant from a vehicle A/C serviceand supplies refrigerant for charging.

F – Power Switch Turns power ON and OFF. Must be on ( I )for unit operation.

G – Power Entry Module

H – Particle Filters (3)

I – Scale Electronically measures the amount ofrefrigerant dispensed, recycled, andremaining in the recovery tank.

Figure 3: Vacuum Pump Fill Port

Vacuum Pump Fill PortLocated inside the unit under the controlpanel.

13

Introduction

R-134a Accessories

Figure 4: R-134a Accessories

A – Service HosesRed and blue hoses with shut-off adaptersfor your 1090ST™ unit to connect to thevehicle. For additional information refer toConnecting Service Hoses to the 1090ST™Unit and Connecting Service Hoses toVehicle.

B – Auto Shut-off Adapters (Couplers)1 - Connects to high- and low-side serviceports of vehicle.2 - Quick connect/disconnect valveactuation without refrigerant venting.Couplers contain manual shut-off handvalves to control flow of refrigerant whileconnected to service ports and preventblow-back while connecting/disconnectinghoses.

C – Low-Side Adapter FittingAdapter, part number 1-15080, to connectlow-side service hose to a refrigerant tankfor adding refrigerant to the 1090ST™ unitor for new tank preparation.

SpecificationsGeneral

Power120 VAC, 60 Cycles, 8 amps maximum230 VAC, 50 Cycles, 4 amps maximum

Shipping WeightEEAC721A — 200 lbs (90.72 kg)EEAC722A — 200 lbs (90.72 kg)

DimensionsDepth 31"Height 51.5"Width 23"

OperatingOperating Temperature Range50–120°F (10–49°C) ambient

Relative HumidityUp to 80%, non-condensing

Maximum Operating Pressure450 psi

Pressure Range30 inHg–400 psi

Single Refrigerant Charge Amount0–15 lbs (4.999 kg)

Vacuum Pump1.5 cfm Rotary Vane

Recovery Rate1 pound/minute, Maximum

StorageStorage Temperature Range-4–140°F (-20–60°C) ambient

Relative HumidityUp to 80%, non-condensing

CapacitiesRefrigerant Charge Amount 0–42 lbs (19.05 kg)

Recovery Amount 0–45 lbs (20.41 kg)

Recycled Refrigerant Tank50 lb with purge port

14

Installation and Operation

Installation andOperation

Use the information in this chapter to:• Prepare your 1090ST™ unit for initial use, • Recover vehicle refrigerant,• Create a vacuum before recharging, and• Recharge with recycled refrigerant.

Install the handle onto the back of the unitusing the four screws included.

Connecting ServiceHoses to the 1090ST™ Unit

Use the following procedure to connectservice hoses to your 1090ST™ unit.

WARNING



• Refer to pages 1-5.

✓✓ Confirm refrigerant type in vehicle,and use the appropriateconnections on the unit.

✓✓✓✓ Always lubricate rubber gasketsand seals at hose connections withfresh refrigerant oil beforeconnecting.

1. Rotate coupler knobs fully CCW (closed).

2. Attach other end of red hose to upper,red labeled (high-side) port on the backpanel of the 1090ST™ unit, if not alreadyinstalled.

3. Attach other end of blue hose to lower,blue labeled (low-side) port on the backpanel of the 1090ST™ unit, if not alreadyinstalled.

Preparing and InstallingRecovery Tank

The recovery tank is shipped with a dry aircharge. The charge must be vented and thetank evacuated before use. Use thefollowing procedure to evacuate the dry airfrom the recovery tank and install it in your1090ST™ unit.

✓✓✓✓ Tighten hose connections fingertight, including master filter/dryerconnections. Use electronic leakdetector to insure connections areleak free.

WARNING

• Do not use any tank with thisequipment other than part numberEAA0253L72A. These tanks are D.O.T.certified for refilling. D.O.T certifiedtanks are marked "D.O.T. 4BA 350" or"D.O.T. 4BA 400".


IMPORTANTVent and evacuate the recovery tankbefore first use. An unprepared tank cancause compressor burnout.

✓✓ The recovery tank must have aminimum of 25 inHg vacuum whenevacuation is complete. If there isnot 25 inHg vacuum, checkconnections and repeat theprocedure.

15


Tank PreparationFollow this procedure to install a newrecovery tank in your 1090ST™ unit. Newrecovery tanks are charged with dry airwhich must be vented before using.

WARNING

• Wear safety goggles, user andbystander. Everyday eyeglasses onlyhave impact resistant lenses, they areNOT safety glasses.

• Cover the liquid hand valve port with ashop towel to help prevent debris frombecoming projectiles.


1. Vent dry air by slowly opening liquid handvalve on the recovery tank.

2. Gently set the recovery tank on the scalewith the hand valves up, facing the backof the unit.

3. Place the velcro strap securely aroundthe recovery tank.

Figure 5: Recovery Tank and Temperature Probe

✓✓✓✓ Use only the 50 pound capacityrecovery tank supplied with your1090ST™ unit or one indicated bythe warning label on the back ofthe unit. Inaccurate refrigerantamount may display if the correcttank is not used. Using any othertype or capacity tank could createthe danger of explosion andpotential for personal injury.

4. Connect tank adapter, part number 1-15080, to liquid port of recovery tank.

5. Connect blue service hose from low-sideport of the 1090ST™ unit to installed tankadapter.

6. Open the following:— Liquid recovery tank valve, and— Blue service hose coupler (CW).

7. Turn both panel valves to OFF.


8. Connect the power cord to the properwall outlet with the correct voltage for theunit. For additional information refer toPower Up in this chapter andSpecifications.

9. Turn power switch ON. The followingscreens will display:— Software Version screen, and— Main Menu screen.

✓✓✓✓ In the unlikely event the LCDscreen is unreadable or a differentlanguage is displayed upon powerup, adjust LCD contrast or changelanguage selection. Refer toAdjusting LCD Contrast orAccessing Language in thischapter.

10. Select VACUUM and press ENTER, thefollowing message displays:

OPEN PANEL VALVES

VACUUM

TIMER xx:xx

UP/DOWN TO ADJUST TIME

Press UP/DOWN buttons to adjust time todesired value.

16


11. Turn the left, low-side panel valve toVACUUM, press START.

12. Monitor the low side panel gauge until aminimum of 25 inHg of vacuum isreached.

13. Close the following:— Liquid recovery tank valve, and— Blue service hose coupler (CCW).

14. Press EXIT and the following messagedisplays:

CLOSE PANEL VALVES

THEN PRESS NEXT.

15. Turn the left, low-side panel valve to OFFand press NEXT.

16. Remove the blue service hose from thetank. Remove the tank adapter 1-15080.

17. Identify the yellow hose leading from thebottom of the unit. Connect the hose endto the tank purge port. Rotate the tankso the valves face towards the back ofthe unit.

18. Identify the red hose leading from thebottom of the unit. Connect the hose endwith the anti-blowback valve to the liquidtank port.

19. Open the liquid recovery tank valve.

20. Identify the blue hose leading from thebottom of the unit. Connect the hose endwith the anti-blowback valve to the vaportank port.

21. Open the vapor recovery tank valve.

22. Connect tank adapter, part number 1-15080, to port of virgin refrigerant tank.

23. Connect the blue service hose from low-side port of the 1090ST™ unit to installedtank adapter.

✓✓✓✓ Position the virgin tank with thevalve up. Do not use the virgintank with the valve underneath thetank.

✓✓✓✓ Do not recover liquid refrigerantfrom a supply tank.

24. Open the following:— Virgin tank hand valve, and— Blue service hose coupler (CW).

25. Select RECOVER and press ENTER, thefollowing message displays:

OPEN PANEL VALVES

RECOVER

AMOUNT RECOVERED

xx lb xx oz

26. Turn the left, low-side panel valve toRECOVER, press START.


The refrigerant flows from the virgin tankthrough your 1090ST™ unit and into theprepared recovery tank.

✓✓✓✓ A minimum of 6 lbs. of refrigerantneeds to be in the recovery tankbefore a charge operation can beaccomplished. Refer to TankFull/Empty.

27. When the desired amount of refrigeranthas been transferred into the recoverytank, close the virgin tank hand valve.

WARNING

Risk of expelling refrigerant under pressure.• Always close the tank valves before

removing the hoses or fittings.• Wear safety goggles and protective



Expelled refrigerant can cause injury.

28. Allow the recover/recycle operation to rununtil display indicates FINISHED. Thenclose the blue service hose coupler.

17


29. Press EXIT when complete, the followingmessage displays:

CLOSE PANEL VALVES

THEN PRESS NEXT.

30. Turn the left, low-side panel valve to OFFand press NEXT, the following messagesdisplay:

PLEASE WAIT . . .

. . . .

OIL DRAIN

RECORD AMOUNT

. . . .

PLEASE WAIT . . .

✓✓✓✓ Discard refrigerant oil inaccordance with local, state andfederal regulations that apply inyour area.

After purging, the 1090ST™ unit willdisplay Main Menu.

Power UpRefer to this section to understand thepower up sequence of the 1090ST™ unit.

1. Connect the power cord to the properwall outlet with the correct voltage for theunit. For additional information refer toSpecifications.

2. Turn power switch ON.

3. The 1090ST™ unit will power up. Thefollowing screens will appear in order:— Software Version screen:

White Industries1090ST

Software Rev(C)2002 White Ind.

— Main Menu screen with default arrowposition:

➜➜ RECOVER • CHARGE• VACUUM • SET-UP

-------------------------------------(ENTER) (AMOUNTS)

✓✓ In the unlikely event the LCDscreen is unreadable or a differentlanguage is displayed upon powerup, adjust LCD contrast or changelanguage selection. Refer toAdjusting LCD Contrast orAccessing Language in thischapter.

Accessing Set-UpAdjusting LCD Contrast

Use the procedure in this section to adjustthe contrast on the LCD screen, with orwithout being able to read the screen.

1. Power up the 1090ST™ unit.

✓✓✓✓ Wait until red LED is OFF.

2. Press UP button once to select SET-UPfrom the Main Menu and then pressENTER, the left button under the LCDdisplay.

3. Select CONTRAST from the Set-UpMenu, press ENTER.

— CONTRAST will be the defaultselection when the Set-Up Menuscreen displays:

➜➜ CONTRAST • LBS/KG• LANGUAGE • – – –• FILTER • – – –-------------------------------------(ENTER) (EXIT)

4. Press ENTER a second time toautomatically reset LCD contrast todefault settings, or press UP button tolighten contrast or DOWN button todarken it.

5. Press EXIT twice to return to Main Menu.

18


Accessing LanguageUse the procedure in this section to changethe language selection of the 1090ST™unit.



2. Press UP button once to select SET-UPfrom the Main Menu and then pressENTER, the left button under the LCDdisplay.

3. Press DOWN button once to selectLANGUAGE from the Set-Up Menu, pressENTER.

• CONTRAST • LBS/KG➜➜ LANGUAGE • – – –

• FILTER • – – –-------------------------------------(ENTER) (EXIT)

4. Press UP or DOWN button to scrollthrough language selections.

5. Press SAVE/EXIT to select a language.

Accessing Master Filter/Dryer ResetUse the procedure in this section to resetthe automatic reminder monitor for themaster filter/dryer.

✓✓✓✓ This procedure should only bedone when the master filter/dryer isreplaced.



2. Select SET-UP from the Main Menu,press ENTER.

3. Select FILTER from the Set-Up Menu,press ENTER.

4. Press RESET button.

5. Press CONFIRM to reset the masterfilter/dryer reminder monitor.

Accessing Units of WeightUse the procedure in this section to changethe refrigerant unit of weight measurement.



2. Select SET-UP from the Main Menu,press ENTER.

3. Select lbs/kg from the Set-Up Menu,press ENTER.

4. Press UP or DOWN button to scrollthrough lb-oz, lb, kg or oz.

5. Press SAVE/EXIT to select a unit ofmeasurement.

OperationThis section contains:— Procedures for connecting the service

hoses to the vehicle, and— Procedures to:

• Recover vehicle refrigerant,• Create a vacuum in the A/C system

before recharging, and• Recharge the A/C system with

recycled refrigerant.

After performing all of the installationprocedures, follow these recommendedvehicle service procedures before usingyour 1090ST™ unit for A/C work.

WARNING

Keep the service hoses away frommoving or hot engine parts. The servicehoses can not withstand hightemperatures or severe mechanicalstress.

19


IMPORTANT• Close the tank valves when not using

your 1090ST™ unit. Leaving tankvalves open may result in refrigerantloss from tank.

• Do not use your 1090ST™ unit outsideof the following limits:— Warmer than 120°F (49°C),— Colder than 50°F (10°C), and/or— Relative humidity greater than 80%.

• Stabilize your 1090ST™ unit to amoderate temperature and inspect forabnormalities.

• Contact your White Industries®representative before operating ifunsure of condition.

• Operating your 1090ST™ unit with thefollowing conditions may reduce itsfunctionality:— Visible evidence of damage,— Has been subjected to prolonged

storage under unfavorable conditions, or

— Has been subjected to severe transportation stresses.

Preliminary ChecksSuccessful use of your 1090ST™ unitdepends on several external factors. Thefollowing information explains these.

Precondition VehicleThe refrigerant in the vehicle A/C system isrecovered faster and more completely whenthe components are warm.

1. Connect the service hoses to the vehicle,refer to Connecting Service Hoses toVehicle in this chapter.

To efficiently recover refrigerant, the vehicleshould be at normal operating temperature.Run the engine until normal operatingtemperature is reached, with• The A/C system off, and • The hood lowered as much as possible

without damaging or crimping the servicehoses.

2. Turn off the engine when normaloperating temperature is reached. Theunit and vehicle are ready to recover andrecycle refrigerant.

Allow Adequate Evacuation TimeEvacuate the vehicle A/C system for aminimum of 30 minutes. This helps ensurevehicle A/C system is free of non-condensable gases (mostly air) andmoisture.

✓✓✓✓ Sometimes a small amount ofrefrigerant is left in the vehicle A/Csystem that is not practical torecover. If recovery time is tooshort or if vehicle components arecold, this parasitic refrigerant canexpand during a vacuum hold cycleor a leak test, and falsely report aleak condition that does not exist.

Follow Vehicle Manufacturer’s A/CService Procedures

When charging, a slow charge conditionmay occur due to pressure equalizationbetween your 1090ST™ unit and the vehicleA/C system. Finish charging by:• Turn the panel valves to OFF,• Starting the engine, • Turning the A/C system ON, • Turn the left, low-side panel valve to

CHARGE, and • The charge will stop when the

programmed amount of refrigerant isreached.


✓✓ Never operate the vehicle A/Csystem with the high-side panelvalve open.

✓✓✓✓ It is the technician’s responsibilityto be familiar with vehiclemanufacturer recommendedservice procedures.

20


Connecting ServiceHoses to Vehicle

Follow this procedure to connect the servicehoses to the vehicle.

1. Connect the red, high-side service hosefrom the 1090ST™ unit to the high-sideservice port on the vehicle.

2. Connect the blue, low-side service hosefrom the 1090ST™ unit to the low-sideservice port on the vehicle.

✓✓✓✓ If the vehicle has more than onelow-side service port, use theservice port closest to theevaporator.

3. Open the service hose couplers.— Refer to the vehicle manufacturer’s

service manual for proper diagnosticprocedures and specifications.

Recover/RecycleRefrigerant fromVehicle

✓✓ Be sure that the vehicle is atnormal operating temperaturebefore recovering refrigerant.

1. Open the liquid and vapor recovery tankvalves.

2. Connect the service hoses to the vehicleand open service hose couplers. Foradditional information refer to ConnectingService Hoses to Vehicle.


OPEN PANEL VALVES

RECOVER

AMOUNT RECOVERED

xx lb xx oz

4. Turn both panel valves to RECOVER,press START.


Refrigerant flows from the vehicle,through your 1090ST™ unit, and into therecovery tank.

The 1090ST™ unit will continuerecovering until the low-side manifoldgauge indicates a vacuum.

5. If a vehicle A/C system leak is suspected,add a partial charge to the system andleak test with an electronic leak detectorto find the leak. Recover refrigerantwhen done testing.

6. Press EXIT when finished, the followingmessage displays:

CLOSE PANEL VALVES

THEN PRESS NEXT.

7. Turn both panel valves to OFF and pressNEXT, the following messages display:

PLEASE WAIT . . .

. . . .

OIL DRAIN

RECORD AMOUNT

. . . .

PLEASE WAIT . . .

8. Any accumulated waste oil expels into thebottle.

9. The amount indicated on the bottle is theamount to add back into the vehicle A/Csystem when recharging.


10. When Main Menu screen appears, closethe red and blue service hose couplers.

21


Purging Non-condensableGas

✓✓ Purging non-condensable gases isan automatic feature executed bythe 1090ST™ unit.

Evacuating A/CSystem

Use this procedure to remove non-condensible gases and moisture from thevehicle A/C system.

✓✓✓✓ Always check the oil level of thevacuum pump before operation.The oil level should be half way upthe sight glass. If no oil level isshown, fill the vacuum pump withoil. Run the vacuum pump forseveral seconds and turn OFFbefore checking oil level.



✓✓✓✓ If the gauges indicate pressure,recover refrigerant from the servicehoses before proceeding. Refer toRecovering Service Hoses.

3. Select VACUUM and press ENTER, thefollowing message displays:

OPEN PANEL VALVES

VACUUM

TIMER xx:xx

UP/DOWN TO ADJUST TIME

Press UP/DOWN buttons to adjust time todesired value.

4. Turn both panel valves to VACUUM,press START.

The panel gauges show vacuumincreasing.

✓✓✓✓ Follow the manufacturerrecommendations for evacuationtime, usually at least 30 minutes.

When evacuation time is done, LED willlight and the following message displays:

FINISHED

5. Press EXIT and the following messagedisplays:

CLOSE PANEL VALVES

THEN PRESS NEXT.


7. Monitor the low-side pressure for 5minutes. Any rise in vacuum indicates aleak in the vehicle system.

✓✓✓✓ If the source of the leak cannot bedetermined, partially charge thesystem and perform a leak testusing an electronic leak detector.

8. When the leak is identified, repeatRecover/Recycle procedure, repair theleak and attempt the Evacuationprocedure again.

Evacuation is complete.

Charging A/CSystem

✓✓ When charging a vehicle afterevacuation, allow for the capacityof the hoses. Each hose holdsapproximately two ounces ofrefrigerant, so the charge amountshould be increased by two ouncesfor each hose used.

— If there is not enoughrefrigerant in the recovery tankto charge, refer to AddingRefrigerant to the 1090ST™Unit in this chapter.

22




3. Select CHARGE and press ENTER, thefollowing message displays:

PRESS ^/v TO SET

CHARGE AMOUNT

xx lb xx oz

(NEXT) (lbs/kg)

4. Press NEXT, the following messagedisplays:

OPEN HIGH-SIDE PANEL VALVE

5. Turn the right, high-side panel valve toCHARGE.

6. Press START, the following messagedisplays:

CHARGE OIL NOW.

PRESS NEXT WHEN

FINISHED.

(NEXT) (EXIT)

7. Press the button on the oil injectionbottle, left, until desired amount of oil ischarged into the A/C system.

8. Press NEXT to start the programmableA/C charge.

✓✓✓✓ When charging, a slow chargecondition may occur due topressure equalization between your1090ST™ unit and the vehicle A/Csystem. Finish charging by:— Turn the panel valves to OFF,— Starting the engine,— Turning the A/C system ON,— Turn the left, low-side panel

valve to CHARGE, and— The charge will stop when the

programmed amount ofrefrigerant is reached.

✓✓✓✓ Never operate the vehicle A/Csystem with the high-side panelvalve open.

9. To monitor the high- and low-side systempressures, always have panel valves inthe OFF position. Refer to themanufacturer’s specifications for properoperation and diagnosis.


DO YOU WANT

TO RECOVER

HOSES NOW?

(YES) (NO)

11. If YES, the following message displays:

DISCONNECT HOSES.

SET PANEL VALVES

TO RECOVER.

12. Close the service hose couplers torecover the hoses and press NEXT, thefollowing message displays:

RECOVERING

AMOUNT RECOVERED

xx lb xx oz

13. The recycler will run until a vacuum isreached and then stop.


CLOSE PANEL VALVES

THEN PRESS NEXT.


Charge is complete.

23


Displaying RefrigerantAmount

Use this procedure to determine the amountof refrigerant in the recovery tank and theamount able to be charged.

1. Press the AMOUNTS button to obtainRECOVERED and CHARGED amounts.

2. Press the MORE button to obtain TANKamount and FILTER/DRYER percentage.

TANK amount is the total weight of thechargeable refrigerant in the recoverytank. Approximately 3 lbs of refrigerant isneeded to meet the quill tube in the tank.This makes the “Tank Empty” point 3 lbs.Any refrigerant over this amount is usablefor charging.

FILTER/DRYER percentage is thepercentage left before the masterfilter/dryer needs to be replaced. Thispercentage number counts down from100%.

Tank Full/EmptyMessages display when the recovery tank isfull or empty.

✓✓✓✓ The unit may only be used tocharge or evacuate an A/C systemwhen the recovery tank is full.

✓✓✓✓ The unit may be used torecover/recycle or evacuate an A/Csystem when the recovery tank isempty.

✓✓✓✓ “Tank Empty” is displayed when theweight in the recovery tank is lessthan approximately 3 lbs.

✓✓✓✓ “Tank Full” is displayed when theChargeable amount of refrigerantin the recovery tank is above 45lbs.

Removing Recovery Tank✓✓ Ensure both valves on the recovery

tank are closed.

1. Disconnect the hoses from the recoverytank.

2. Remove the velcro strap on the recoverytank.

3. Gently remove the recovery tank from thescale.

Recovering ServiceHoses

Recover the service hoses before removingthem from the 1090ST™ unit. Servicehoses are not connected to a vehicle duringthis procedure.

1. Connect the power cord to the properwall outlet with the correct voltage for theunit. For additional information refer toSpecifications.



OPEN PANEL VALVES

RECOVER

AMOUNT RECOVERED

xx lb xx oz

4. Turn both panel valves to RECOVER,press START.

Refrigerant flows through your 1090ST™unit, and into the recovery tank.

Service hose recovery is complete whena of vacuum is reached.

5. Press EXIT when FINISHED, thefollowing message displays:

CLOSE PANEL VALVES

THEN PRESS NEXT.

Service hose recovery is complete.

24


Evacuating ContaminatedService Hoses

✓✓ If contaminated refrigerant orrefrigerant other than R-134a ispresent in service hoses, useseparate recover only machine tocollect refrigerant.

Adding Refrigerant to the1090ST™ Unit

Follow this procedure to add virgin orrecycled refrigerant to your 1090ST™ unit.

✓✓✓✓ The recovery tank should have atleast six pounds of refrigerant orthe charge procedure may not becompleted.

1. Refer to Preparing and InstallingRecovery Tank in this chapter.


✓✓✓✓ Install the supplied tank adapter,part number 1-15080, between thetank valve and the blue servicehose. The virgin tank should beupright (valve up).

✓✓✓✓ Do not recover liquid refrigerantfrom a supply tank.

3. Connect the blue service hose from the1090ST™ unit to the refrigerant supplytank.

4. Open the following:— Supply tank valve, and— Blue service hose coupler.

5. Connect the power cord to the properwall outlet with the correct voltage for theunit. For additional information refer toPower Up and Specifications.



OPEN PANEL VALVES

RECOVER

AMOUNT RECOVERED

xx lb xx oz

8. Turn the left, low-side panel valve toRECOVER, press START.

The refrigerant flows from the virgin tankthrough your 1090ST™ unit and into theprepared recovery tank.

✓✓✓✓ Monitor the weight on the LCDdisplay until the desired amount ofvirgin refrigerant has beentransferred. Refer to TankFull/Empty.

9. When the desired amount of refrigeranthas been transferred into the recoverytank, close the virgin tank hand valve.

10. The recycler will run until a vacuum isreached and will stop, then close the blueservice hose coupler.


CLOSE PANEL VALVES

THEN PRESS NEXT.

12. Turn the left, low-side panel valve to OFFand press NEXT, the following messagesdisplay:

PLEASE WAIT . . .

. . . .

OIL DRAIN

RECORD AMOUNT

. . . .

PLEASE WAIT . . .

25


13. Any accumulated waste oil expels into thebottle.


After purging, the 1090ST™ unit will displayMain Menu.

Errors and MessagesError messages will flash on the bottom lineof LCD screen and the LED will flash untilconditions are corrected.

Temperature ErrorTemperature errors can occur when the1090ST™ unit is operating outside itsnormal temperature range or a temperatureprobe is damaged. If this should occur, thecompressor will shut down. Warm the1090ST™ unit to normal operatingtemperature, turn unit OFF and then ON. Ifthe temperature error is still present, callservice.

Pressure Switch ErrorA pressure switch error can occur wheninternal excessive pressure is seen. Thishigh pressure will be seen if the handvalves on the recovery tank is closed or thehoses on the recovery tank are not installedor tight. While in recovery, if this shouldoccur, the compressor will shut down. Openthe tank valves or install or tighten the hosefittings on the recovery tank to alleviate thepressure and restart recovery sequence.

High Pressure ErrorA high tank pressure error can occur if airpressure in the recovery tank reaches 350psi. This high pressure will be seen if thereis excessive air in the recovery tank due tovehicle A/C system having a leak. If thisshould occur, turn both panel valves to OFFand press EXIT. Ignore oil drain prompt,press NEXT to allow the 1090ST™ unit topurge and fix vehicle A/C system leak.

Tank EmptyA weight error will occur if one of theseconditions arises:• The tank is empty or below 3lbs in the

tank, or • The scale circuitry malfunctions.

If this should occur:• Add refrigerant to recovery tank, or • Call service to repair the scale circuitry.

Tank FullA full tank message will occur if one ofthese conditions arises:• A full recovery tank weight is seen, or• The scale circuitry malfunctions.

If this should occur:• Empty a portion of the recovery tank into

a certified tank, • Replace the recovery tank, or • Call service to repair the scale circuitry.

No Tank PresentA no tank message will occur if one of theseconditions arises:• There is no tank on the scale, or• The scale circuitry malfunctions.

If this should occur:• Replace the recovery tank, or• Call service to repair the scale circuitry.

Replace FilterA replace filter message will occur whenmaster filter/dryer percentage has expired.When this occurs, replace the masterfilter/dryer and reset the automatic remindermonitor, refer to Accessing MasterFilter/Dryer Reset.

26

Maintenance

MaintenanceUse this chapter to maintain your 1090ST™ units’:• Master filter/dryer, • Vacuum pump, and• When storing the unit for prolonged

periods.

Troubleshooting information and a list ofparts and accessories are also included.

Equipment Tips❐ A stable scale weight reading, with the

refrigerant not moving around in therecovery tank, is needed at thebeginning and end of a recover/recycleor charge program. Do not lean on ormove the unit at these times.

❐ Never attempt to change the recoverytank while your 1090ST™ unit is in use.

❐ Always recover the service hoses beforedisconnecting them from your 1090ST™unit. For additional information refer toRecovering Service Hoses.

❐ Never drop the recovery tank onto thescale. This may damage the scaleassembly.

❐ Always oil the seals before connectingto any tank, filter or fitting. A leakyconnection or no-flow condition mayresult if the connection is assembleddry.

❐ Always close all recovery tank valves,clockwise, when your 1090ST™ unit isnot in use.

Master Filter/DryerChange the master filter/dryer when thefilter percentage monitor has diminished to0% since the last master filter/dryer change.Replacement of the master filter/dryer willalso be indicated by the flashing of the LEDand the REPLACE FILTER message on theLCD screen. The filter monitor has a resetof 95 lbs. During the course of recycling,this number decreases until it reaches zero.When zero is reached, the masterfilter/dryer needs to be replaced and themonitor reset. Refer to Resetting MasterFilter/Dryer Monitor or Accessing MasterFilter/Dryer Reset. Recovered refrigerantquality may be compromised if the filter isnot replaced when required.

Changing the Master Filter/DryerUse the procedure in this section to changethe master filter/dryer.

WARNING

• Wear safety goggles and protectivegloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses. Ifany refrigerant gets into eyes, flushwith water and seek a doctor's aidimmediately, even though irritationmay cease.

• Do not remove the master filter/dryerwhile under pressure. Perform themaintenance procedure for removingthe master filter/dryer in this section.



1. Evacuate service hoses by recovering ifnecessary and pulling a vacuum. Foradditional information refer to RecoveringService Hoses.

2. Turn OFF power to the 1090ST™ unitand remove power cord from wall outlet.

3. Unscrew the two hose fittings from themaster filter/dryer.

27

Maintenance

Figure 6: Master Filter/Dryer

4. Remove the master filter/dryer from itsbracket.

✓✓✓✓ Dispose of the filter according tolocal, state and federal regulationsthat apply in your area.

5. Lightly oil hose seals and install a newmaster filter/dryer, matching the directionof FLOW on the filter with the flow decalon the cabinet.

6. Attach the hose fittings hand tight.

7. Reset master filter/dryer percentagemonitor.

Resetting Master Filter/DryerMonitor

Use the procedure in this section to resetthe automatic reminder monitor for themaster filter/dryer.

✓✓✓✓ This procedure should only bedone when the master filter/dryer isreplaced.



2. Select SET-UP from the Main Menu.

3. Select FILTER from the Set-Up Menu.

4. Press RESET button.

5. Press CONFIRM to reset the masterfilter/dryer reminder monitor.

Maintaining the VacuumPumpChecking Vacuum Pump Oil Level

1. Look through oil level sight glass to verifyvacuum pump oil level.

Figure 7: Oil Level Sight Glass

2. Oil level should appear to be in themiddle of the sight glass.

3. If oil level is low, add oil to vacuum pump,refer to Adding Oil to Vacuum Pump.

Adding Oil to Vacuum PumpFollow this procedure to add oil to thevacuum pump.


2. Remove all screws located around thelower edge of the plastic top cover.

3. Gently lift the plastic top cover off theunit.

4. Lift the hinged control panel up and laytowards the back of the unit.

5. Remove oil fill screw cap.

28

Maintenance

Figure 8: Vacuum Pump Fill Cap

6. Add oil to vacuum pump fill port until theoil is visible halfway up the sight glass.

7. Install the oil fill screw cap.

8. Replace control panel to original position.

9. Replace plastic top cover and screws.

Changing Vacuum Pump OilThe vacuum pump contains approximately19.5 oz. of oil. The oil must be changed atleast every 6 months. The oil may have tobe changed earlier if the oil is no longerclear when viewed through the sight glass.


WARNING

• Wear safety goggles and protectivegloves, user and bystander. Everydayeyeglasses only have impact resistantlenses, they are NOT safety glasses. Ifany refrigerant gets into eyes, flushwith water and seek a doctor’s aidimmediately, even though irritationmay cease.



2. Put a container under the oil drain tube ofthe vacuum pump.

3. Remove the oil drain screw cap and drainoil.


4. Install the oil drain screw cap.

5. Refill vacuum pump with oil, refer toAdding Oil to Vacuum Pump.

Storing the 1090ST™ UnitFollow this procedure when storing your1090ST™ unit for prolonged periods (3months or more) of time.

✓✓✓✓ Storage temperature should notexceed the limits of -4° to 140°F.

1. Change the vacuum pump oil. Refer toChanging Vacuum Pump Oil procedure.

2. Close both hand valves on the recoverytank.

3. Remove the yellow hose from therecovery tank.

4. Close both service hose couplers.


29

Maintenance

TroubleshootingSymptom Possible Cause Remedy

Machine does not turn on • Power cord not plugged in – Plug in the power cord

• Power switch OFF – Turn power switch ON

• No power in A.C. outlet – Check power source

Refrigerant not being • Hand valves on tank not open – Open hand valvesremoved from vehicle

• Panel valves or service hose – Open panel valves or couplers not open couplers

• Recovery tank full – Change tank or Charge refrigerant

Excessive purging of • Fitting(s) not properly – Tighten fitting(s) finger tightnon-condensable gases connected to master filter/dryer

• Leaky service hose or – Tighten fittings oradapter connection drawing replace seals inin air finger tight fittings

Does not charge • Liquid hand valve on recovery – Open liquid hand valvetank not open

• Fitting not properly – Tighten fitting finger tightconnected to recovery tank

• No refrigerant in tank – Fill tank with refrigerant

• Leak in vehicle system – Repair vehicle system leak

• Service hose couplers – Open couplers not open

Machine does not draw • Loose hose connection – Tighten loose hose a vacuum connections

• Leak in vehicle system – Repair vehicle system leak

Refrigerant loss from • Leaky hand valve(s) on tank – Make sure hand tank on scale over time valves are either open

completely (CCW) or closedcompletely (CW) andleak test

• Leaky fitting(s) – Oil seal with refrigerant oiland reconnect, or replace fitting, oil sealand reconnect

30

Maintenance

Symptom Possible Cause Remedy

Long recover times • System being recovered is – Heat A/C system by cold and has components that running engine with hold a substantial amount of A/C OFF and keep hood liquid refrigerant closed as much as practical

to hold in heat

Temperature Error • Operating outside normal – Warm to normal operatingtemperature range temperature, turn unit OFF

then ON

• Temperature probe damaged – Call service

Pressure Switch Error • Vapor hand valve on recovery – Open vapor hand valve on (Internal excessive tank is closed recovery tankpressure)

• Red hose fitting on the – Install or tighten red hoserecovery tank is not installed, fitting on recovery tankor tight

High Pressure Error • Excessive air in tank – Turn both panel valves OFF, (Excessive tank exit out of recovery screen, pressure) allow unit to purge, and fix

leak

Tank Full • Recovery tank full or – Empty recovery tankoverloaded

– Replace the recovery tank

• Scale circuitry malfunctions – Call service

No Tank Present • No tank on the scale – Install a recovery tank


Tank Empty • Not enough refrigerant in – Add refrigerant to recoverytank to charge tank


Replace Filter • Master filter/dryer monitor – Replace master filter/dryerhas reached 0% and reset monitor

31

Maintenance

Replacement PartsPart Number Description1-27280 .............. Service Fitting, Low-Side1-27180 ............ Service Fitting, High-SideEAA0253L72A .... Recovery Tank, 50 pound

Optional AccessoriesEAK0030C01AB ................ Master Drier KitEAK0027C00AS ................ Vehicle Adapter

....................................Repair Kit (O-rings)1-15080 .............. Low-Side Adapter Fitting

GeneralEAK0227L01A .......... Vacuum Pump Oil KitEEAC720AV...................... Protective Cover

For service or to order replacement parts oroptional accessories, contact your WhiteIndustries® Representative or call 1-800-225-5786.

White IndustriesLimited Product Warranty

Seller warrants only to the original purchaser (user) that under normal use, care and service, this unit shallbe free from defects in material and workmanship for one year from the date of original invoice provided: 1) warranty card and proof of purchase is submitted to the factory within 30 days from date of sale and 2) freight charges are prepaid to the authorized service center*. Gauge calibration, filter elements, lightbulbs, hoses, O-rings, gaskets, depressors, tank stems, lost refrigerant or fluid (new or recovered), and allother attachments, supplies and consumables (except as otherwise provided herein) are not warranted.

This Warranty does not cover (and separate charges for parts, labor and related expenses shall apply to)any damage to, malfunctioning, inoperability or improper operation of this unit caused by, resulting from orattributable to (A) abuse, misuse or tampering; (B) alteration, modification or adjustment of this unit by otherthan Seller's authorized representatives; (C) installation, repair or maintenance (other than specified operatormaintenance) of this unit or related equipment, attachments, peripherals or optional features by other thanSeller's authorized representatives; (D) processing of, or contamination with, materials or chemicals otherthan those recommended for processing or recycling with this equipment; (E) improper or negligent use,application, operation, care, contamination, cleaning, storage or handling; (F) fire, water, wind, lightning orother natural causes; (G) adverse environmental conditions, including, without limitation, excessive heat,moisture, corrosive elements, dust or other air contaminants; radio frequency interference; electric powerfailure; power line voltages beyond those specified for this unit; unusual physical, electrical or electro-mag-netic stress; and/or any other condition outside of Seller's environmental specifications; (H) use of this unit incombination or connection with other equipment, attachments, supplies or consumables not manufactured orsupplied by Seller; or (I) failure to comply with any applicable federal, state or local regulation, requirement orspecification governing emission analyzers and related supplies or consumables (including, without limita-tion, filters, printer paper, printer ribbons and calibration gases).

NO OTHER WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATIONANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,SHALL APPLY, AND ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY EXCLUDED.

Seller's obligations under this warranty are limited solely to the repair or, at Seller's option, replace-ment of or refund of the original purchase price for, Equipment or parts which to Seller's satisfactionare determined to be defective and which are necessary, in Seller's judgment, to return this unit togood operating condition. Repairs or replacements qualifying under this Warranty will be performed ormade by a factory authorized service center on regular business days during Seller's normal working hourswithin a reasonable time following Buyer's request and provided: 1) the warranty card and proof of purchaseis on file with the manufacturer, 2) if proof of purchase is not on file with the manufacturer, the original pur-chaser (user) must provide proof of purchase to a factory authorized service center before service is ren-dered, and 3) freight is pre-paid one way. All requests for warranty service must be made during the statedwarranty period.

* Call 1-800-225-5786 for factory authorized service information.

Return Goods Authorization (RGA): If the manufacturer requests that a product be shipped to its facility,an RGA (Return Goods Authorization) number must be issued prior to shipment, and transportation chargesmust be prepaid to the factory.

white 1090st-b cover 1-10-03

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