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High Performance V acuum PumpModel 15424/15448/15444Operating Manual .............................. 2

Bombas de V acío de Alto RendimientoModèle 15424/15448/15444Manuel del Operador ........................ 8

OperatingManual

Pump components

1. Intake Fitting (upper fitting is 1/2" Acme;side fitting is 1/4" MFL)

2. Gas Ballast Valve (locatedbeside handle base)

3. Oil Fill Port4. Sight Glass5. Die-Cast Aluminum Housing6. Oil Drain7. Molded Polycarbonate Base8. Iso-Valve TM — Isolates the pump

from the system9. Powerful, High Torque Motor

10. Power Switch11. Through-The-Handle Exhaust12. Sure-Grip Handle

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Table of contents

Warnings .............................................................2Pump components ..............................................2CoolTech ® high performancevacuum pumps ...................................................3Before using your vacuum pump .......................4To use the gas ballast feature ............................5To shut down your pump after use ....................5To maintain your high vacuum pump .................5

Vacuum pump oil ...........................................5Oil change procedure ....................................5Cleaning your pump .......................................5

Troubleshooting guide ........................................6Failure to start .....................................................6

Oil leakage .....................................................6Failure to pull a good vacuum .......................6

CoolTech ® pump specifications ..........................6Replacement parts .............................................7Warranty coverage .............................................7

Out of warranty ..............................................7

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Warnings

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For use on A/C-R systemsusing CFCs, HCFCs and HFCsin conjunction with mineral oil,ester oil, alkylbenzene oil andPAG oil as lubricants. Not foruse with ammonia or lithiumbromide systems. Not for usewith flammable refrigerants.

When working with refrigerants,goggles should always be worn.Contact with refrigerants may causeinjury.Improper use or connections maycause electrical shock hazards. Readand follow the instructions carefully andtake precautions to avoid electricalshock hazards. Be sure that all associ-ated devices are properly groundedbefore energizing circuits.The normal operating temperature willcause certain external portions of thepump to be hot to the touch. Do nottouch the pump housing or motorduring operation.

Use separate manifolds and hoses forR-134a systems. Cross-contamina-tion with other refrigerant types willcause severe damage to the A/Csystem and to service tools andequipment. Do not mix refrigeranttypes through a system or in thesame container!Avoid breathing refrigerant andlubricant vapor or mist. Exposure mayirritate eyes, nose and throat.To remove R-134a from the A/Csystem, use service equipmentcertified to meet the requirements ofSAE J2210 (R-134a recyclingequipment). If accidental systemdischarge occurs, ventilate work areabefore resuming service.HFC-134a service equipment orvehicle A/C systems should not bepressure tested or leak tested withcompressed air. Some mixtures of air/HFC-134a have been shown to becombustible at elevated pressures.These mixtures are potentiallydangerous and may result in fire orexplosion causing injury or propertydamage.Additional health and safety informa-tion may be obtained from refrigerantand lubricant manufacturers.

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CoolTech® high performance vacuum pumps

Congratulations on purchasing one of Robinair’stop quality CoolTech ® vacuum pumps. Your pumphas been engineered specifically for air condition-ing and refrigeration service, and is built withRobinair’s proven offset rotary vane for fast,thorough evacuation.You’ll appreciate these key features...Iso-ValveTM

Allows the pump to be shut off while still con-nected to the A/C-R system, which is handy forchecking rate of rise. With the valve handle in the“Open” position, the pump is open to the systembeing evacuated. In the “Close” position, thepump is isolated from the system.High vacuum rating

The two-stage, offset rotary vane design providespowerful, quiet high vacuum capability andassures moisture removal, while the highpumping capacity reduces evacuation time.Multiple refrigerant capability

This pump can be used for R-12, R-22, R-500and R-502, as well as for R-134a. The inlet “tee”has both 1/4" MFL and 1/2" Acme fittings to accom-modate hoses from either type of manifold.

Directed exhaust

The exhaust is expelled through the handle todirect it away from the service technician.Gas ballast

A precise amount of atmospheric air is introducedinto the pump, preventing condensation ofmoisture vapor and helping maintain the purity ofthe pump oil. By using the gas ballast, the pumpoperates more efficiently and pump life isextended.Sure-grip handle

The one-piece, molded handle makes it easy tocarry the pump to and from job sites, and thehandle stays cool to the touch during operation.Compact design

Your pump measures approximately 40 cm long,while aluminum housing and offset rotary vaneskeep the pump weight low, making it easy tocarry.

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CAUTION

Before connecting your vacuum pump to anA/C-R system, remove refrigerant from thesystem in an accepted manner. Damage to thepump may occur if evacuation is started whilethe system is under high pressure. Robinairrecommends use of our Refrigerant Recoveryand Recycling equipment.

Wiring Instructions:The CoolTech features dual voltage ranges.Before operating the pump, read and follow theserewiring instructions (if necessary) to be sure yourpump is wired for the appropriate voltage.

CAUTIONUnplug the unit before beginning any servicework. Improper use or connections can causeelectrical shock. Only qualified personnelshould perform service work.

The CoolTech vacuum pump is factory wired for ahigh voltage range of 220 to 240 volts. To wire theswitch for a low voltage range of 110 volts to 115volts, follow these steps.

1. Disconnect the unit from the AC powersource before proceeding.

2. Loosen the screws on the plate at the rear ofthe motor, and carefully move the plate asideto clear the opening.

3. Disconnect the leads and reconnect for lowvoltage, following the diagram and chart.(High voltage connections are also shownif you want to rewire at some time.)

4. Check to see that all connections aresecure and that there are no short circuits.Be sure the grounding connector is properlyconnected.

5. Re-install the plate on the rear of motor withthe screws which were loosened in Step 2.

IMPORTANT: Check for short circuits using acontinuity tester before reconnecting to the ACpower source.

In all cases, motors are designed for operatingvoltages plus or minus 10% of the normal rating(see SPECIFICATIONS). Single voltage motorsare supplied fully connected and ready tooperate.

1. Check to make certain the voltage andfrequency at the outlet match the specifica-tions on the pump motor decal. Check theON-OFF switch to be sure it is in the OFFposition before you plug the pump into anoutlet. Check to be certain the gas ballastvalve is closed. Remove and discard theexhaust plug from the end of the pump ’shandle.

2. The pump is shipped without oil in thereservoir. Before starting the pump, fill withoil. Remove the OIL FILL cap (black plasticplug directly in front of the handle) and addoil until oil just shows in the bottom of thesight glass. The approximate oil capacity ofthe pump is 400 milliliters.

3. Replace the OIL FILL cap and remove thecap from one of the inlet ports. Turn the Iso-Valve to OPEN. Turn the motor switch toON. When the pump runs smoothly, turn theIso-Valve to CLOSED and replace the capon the inlet port. This may take from two to30 seconds depending on the ambienttemperature. After the pump runs forapproximately one minute, check the sightglass for proper oil level — oil should beeven with the sight glass OIL LEVEL line.Add oil if necessary.

NOTE: When the pump is running, the oil levelshould be even with the line on the sight glass.Underfilling will result in poor vacuum perform-ance. Overfilling can result in oil blowing from theexhaust.Your pump is now ready to evacuate air condition-ing and refrigeration systems. Follow normalservice procedures and the A/C-R manufacturer ’sinstructions for connections to the system.

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Before using your vacuum pump

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To use the gas

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ballast feature

Moisture from the A/C-R system that is carriedinto the pump as a vapor tends to condense into aliquid and combine with the vacuum pump oil.When moisture contaminates the pump oil, itreduces the pump ’s ability to reach its ultimatedeep vacuum level.The gas ballast valve purges a small amount ofatmospheric air through the exhaust chamber.This extra volume of air mixes with the vapor fromthe refrigerant system to prevent condensationand to help exhaust moisture in the form of vaporfrom the pump.To use the gas ballast, start the pump and openthe gas ballast valve until the system has reachedapproximately 1000 –3000 microns.Close the valve to allow the pump to pull down toits ultimate vacuum level. The gas ballast valve islocated beside the handle, opposite the inletfitting.The gas ballast valve may be opened or closed atany time during pump operation. It is fully open attwo turns counterclockwise.NOTE: Robinair recommends the use of athermistor vacuum gauge to most accuratelymeasure vacuum levels.

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To maintain your high

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vacuum pump

For maximum performance, Robinair recom-mends changing vacuum pump oil after each use.Vacuum pump oilThe condition and type of oil used in any highvacuum pump are extremely important in deter-mining the ultimate attainable vacuum. Robinairrecommends the use of our Premium HighVacuum Pump Oil. This oil has been specificallyblended to maintain maximum viscosity at normalrunning temperatures and to improve coldweather starts.Robinair Premium High Vacuum Pump Oil isavailable in handy quart containers or in conve-nient gallon containers. Order by part number:13203 — Quart (shipped 12 quarts per case)13204 — Gallon (shipped 4 gallons per case)Oil change procedure

1. Be sure the pump is warmed up.2. Remove the OIL DRAIN cap. Drain contami-

nated oil into a suitable container anddispose of properly. Oil can be forced fromthe pump by opening the inlet and partiallyblocking the exhaust with a cloth while thepump is running. Do not operate the pump formore than 20 seconds using this method.

3. When the flow of oil has stopped, tilt thepump forward to drain residual oil.

4. Replace the OIL DRAIN cap. Remove theOIL FILL cap and fill the reservoir with newvacuum pump oil until the oil just shows atthe bottom of the sight glass. The approxi-mate oil capacity of the pump is 400 millili-ters.

5. Be sure the inlet ports are capped, then turnON the pump. Allow it to run for one minute,then check the oil level. If the oil is below thesight glass OIL LEVEL line, add oil slowly(with the pump running) until the oil reachesthe OIL LEVEL line. Replace the OIL FILLcap, making sure the inlet is capped and thedrain cap is tight.

6. If the oil is badly contaminated with sludgethat forms when water is allowed to collect inthe oil, you may need to remove the oilreservoir cover and wipe it out.

Repeat this procedure as required until thecontamination is removed. Replace the OILDRAIN cap and refill the reservoir to the properlevel with fresh pump oil (see Step 4).Cleaning your pumpClean the pump with soap and water only. Do notuse commercial cleaners that contain degreasingagents that can damage polycarbonates. Thepump handle and base are made of Lexan*, oneof the toughest polycarbonate plastics available.However, it is sensitive to degreasing agents.*Lexan is a registered trademark of General ElectricMotor LubricationAfter three years of normal service or one year ofheavy-duty service, add oil annually. Use electricmotor oil or SAE 10 oil.

To shut down your

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pump after use

To help prolong pump life and promote easystarting, follow these procedures for shutdown:

1. Close the manifold valve between the pumpand the system.

2. Turn the Iso-Valve to the CLOSED position.3. Remove the hose from the pump inlet.4. Turn the pump power switch to OFF, then

return the Iso-Valve to the OPEN position fora few seconds to relieve any vacuum insidethe pump.

5. Cap the inlet port to prevent any contamina-tion or loose particles from entering the port.

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Troubleshooting guide

Your CoolTech ® pump has been designed fordependable use and long life. If something shouldgo wrong, however, the following guide will helpyou get the pump back into service as quickly aspossible.If disassembly of the pump is required, pleasecheck your warranty. The warranty may bevoided by misuse or customer tampering whichresults in the pump being inoperable.Failure to start

Check the line voltage. Robinair pumps aredesigned to start at +10% line voltage (loaded) at0o C. At extremes, however, switching between thestart and run windings may occur. When startingthe pump in cold temperatures, be sure the Iso-Valve and inlet port are open to free air.Oil leakage

1. Be sure the oil is not a residual accumulationfrom spillage, etc.

2. If leakage exists, the module cover gasket orthe shaft seal may need replacing. Follow theinstructions supplied with the seal replace-ment kit, part number 15367. If leakageexists in the area of the drain plug, you mayneed to reseal the plug using a commercialpipe thread sealer.

Failure to pull a good vacuum

1. Be sure the Iso-Valve on the pump is in theOPEN position and the gas ballast knob istightly sealed.

2. Be sure the vacuum gauge and all connec-tions are in good conditon and leak-free.You can confirm leakage by monitoring thevacuum with a thermistor gauge whileapplying vacuum pump oil at connections orsuspected leak points. The vacuum willimprove briefly while the oil is sealing theleak.

3. Be sure the pump oil is clean. A badlycontaminated pump may require several oilflushes. See OIL CHANGE PROCEDURE.

NOTE: Use only high vacuum pump oil. Other oilswill prevent pull-down to a deep vacuum.

4. Check to be sure the gas ballast knob istightly closed.

5. Be sure the oil is at the proper level. Formaximum pump operation, the oil must beeven with the OIL LEVEL line on the sightglass when the pump is running. See OILCHANGE PROCEDURE. Do not overfill —operating temperatures will cause the oil toexpand so it will appear at a higher level thanwhen the pump is not running. To check theoil level, start the pump with the inlet capped.Check the oil level in the sight glass. Add oilif necessary.

CoolTech® pump

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specifications

Model 15424/15448/15444

Frequency Range ..................................50–60 HzFree Air Displacement ..................................4 cfm

94 l/m @50 Hz113 l/m @60 Hz

Stages .................................................................2Motor Speed ............................1425 rpm @50 Hz

1725 rpm @60 HzVoltage Range ......................................110–115V

220–250VFactory Micron Rating ..........................20 micronsApproximate Oil Capacity ...........................400 mlWeight ........................................................14.5 kgWidth .........................................................14.3 cmHeight ........................................................24.8 cmLength ..........................................................40 cmIntake .................................1/4" MFL and 1/2" AcmeMin. Starting Temp. (at 90% Voltage) .............0o CMotor Size ....................................................1/3 HP

Capacitor StartOperating Temp. ...........................................68o CNOTE:

1. All motors are internally protected (automaticreset).

2. Operating temperatures are typical fornormal operating conditions.

3. Model 15448 has a bipolar side grounded plug.4. Model 15444 has an Australian plug type

AS3112.

Because of ongoing product improvements,we reserve the right to change design,specifications, or materials without notice.O

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Replacement parts

Part Figure Order

Oil Drain Cap (qty. 6) 1 40572Oil Drain Kit(includes cap and drain) 2 48116Module Cover Kit 3 15337(includes items 1, 2, 4, 5)Oil Fill Cap 4 15371(includes item 6)Intake “Tee ” Fitting(includes caps) 7 15495Intake Cap (Acme) 8 15330Intake Cap (1/4" flare - qty. 6) 9 41139Vent Bolt (includes O-rings) 10 15338Power Cord and Switch Assembly 11 15366Motor 12 15665Coupling 13 48103Iso-Valve TM Assembly 14 15368Base and Foot Assembly 15 15369Replacement Module 16 15547(includes items 1 –9 & 14)Seal Replacement Kit (not shown) 15367

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Warranty coverage

Robinair CoolTech ® vacuum pumps are war-ranted against defects in material and workman-ship for one year of normal use from the date ofpurchase. See your distributor for warrantydetails.Out of warranty

A pump which is no longer covered by the one-year warranty period and which fails to operateproperly should be returned to the distributor witha full written explanation of the problem. Thedistributor may suggest returning the pump to thefactory. Before returning an out-of-warrantypump, review all maintenance procedures toavoid an unnecessary return. Replacement partsare available for doing your own service.

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NOTICE: Airborne Noise EmissionsThis equipment has been tested for airborne noise emission perthe Council Directive for Machinery (89/392/EEC) Section 1.7.4Instructions — Essential Health and Safety Requirements.

Sound levels do not exceed 80dB(A) actual value.

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115248 Rev. B (04/30/03) Model 15424/15448/15444 Vacuum Pump © SPX Corporation

Due to ongoing product improvements,

we reserve the right to change design,

specifications and materials without notice.

The unit’s weight scale provides a means for metering the amount of refrigerant

needed for optimum air conditioning system performance as recommended by

OEM manufacturers. Do not use the unit to sell refrigerant by weight, because

this may not be permitted by certain local jurisdictions.

To help us serve you better, please be prepared to provide the model

number, serial number, and date of purchase.

To validate your warranty, you must complete the warranty card

included with the unit and return it within ten days from the purchase

date.

If your unit needs replacement parts, please contact your local

distributor. If your unit needs repairs, you may locate service centers

at www.robinair.com or by calling International Customer Service.

Call our

International Customer Service Line at

1-507-455-7223

or email our Technical Support at

Robinairtechsupport@servicesolutions.spx.com

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SPX Corporation655 Eisenhower DriveOwatonna, MN 55060-0995 USATechnical Services: 1-800-822-5561

Fax: 1-800-822-7805Customer Service: 1-800-533-6127

Fax: 1-800-322-2890Web Site: www.robinair. com