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Operating
M
anual
1.2 cfm
(at 60 Hz)
Models 15234/15226/15296
Two-Stage V acuum Pump
For use with refrigerants
R-12, R-22, R-500, R-502, or R-134a
PARTS IDENTIFICATION
BLACK EXHAUST
PLUG (NOTE VENT HOLE)
RED SHIPPING PLUG
(REMOVE AND
DISCARD)
GAS
BALLAST
VALV E
“TEE” FITTING
OIL LEVEL
INLET
SIGHT
GLASS
INLET
CAP
1
/2" ACME INLET
(R-134a)
1
/4" MFL INLET
(R-12, 22, 500, 502)
WARNING!
Use separate manifolds and hoses for R-134a systems. Crosscontamination with other refrigerant types will cause severe
damage to the A/C systems and to service tools and equipment.
Do not mix refrigerant types through a system or in the same
container!
For use on A/C systems using CFCs, HCFCs, and HFCs in
conjunction with mineral oil, ester oil, alkylbenzene oil, and
PAG oil as lubricants. Not for use with ammonia or lithium
bromide systems. Not for use with flammable refrigerants.
2
© 2000, SPX Corporation
INTRODUCTION
Your vacuum pump has been factory tested and meets Robinair’s stringent
quality standards. This high performance pump will provide you with years of
trouble-free service if you follow these instructions for operating and maintaining the pump.
The pump’s offset rotary vane design provides high efficiency operation. The
motor is properly sized to ensure 32oF (0oC) starting at 90 percent of the rated
voltage. And the inlet “tee” fitting lets you use one pump for R-12, R-22,
R-500, R-502, and R-134a systems.
Be careful when removing the pump and contents from the shipping carton. If
there is any apparent shipping damage to the pump, the shipping company
should be notified immediately and the container saved for inspection.
OPERATING INSTRUCTIONS
WARNING! Wear safety goggles when working with
refrigerants. Contact with refrigerant can cause eye
injury.
1. Remove and discard the red shipping plug at the top of the finned reservoir.
2. Fill the pump reservoir to the “OIL LEVEL” line on the sight glass on the
front of the pump. Use the oil packaged with the vacuum pump or fresh
Robinair Premium High Vacuum Pump Oil, available at your supplier.
3. Install the black plastic operating exhaust plug. Note that the operating plug
is notched to allow exhaust flow.
CAUTION! Do not attempt to operate the pump with the exhaust
port plugged. To do so could result in permanent damage to the
pump or could cause the plug to be blown from the pump reservoir.
4. Note the electric motor voltage rating, and connect to the proper power
source.
CAUTION! Avoid the use of extension cords. An extension cord may overheat and cause fire. If you must use an
extension cord, use the shortest possible cord with a
minimum size of 14 AWG.
You are now ready to remove the inlet cap for the appropriate inlet (1/4" for
R-12, R-22, R-500, and R-502; 1/2" Acme for R-134a) to connect the pump to
the air conditioning system. Follow the system manufacturer’s directions for
evacuation.
Vacuum Pump Models 15234/15226/15296
3
USING THE GAS BALLAST (Vented Exhaust)
All Robinair high vacuum pumps feature a gas ballast for more thorough
evacuation and longer pump life. As vapors from an A/C or refrigerant system
containing more than the average amount of moisture pass through a vacuum
pump, they condense into liquid, and combine with the vacuum pump oil.
When these vapors mix with the oil, it becomes contaminated, raises the vapor
pressure of the vacuum pump oil, and reduces the pump's ability to reach its
ultimate attainable vacuum. Opening the ballast valve purges a small amount of
atmospheric air through the exhaust chamber. This extra volume of air mixes
with the vapors from the A/C or refrigerant system, prevents them from being
condensed, and helps them to be exhausted from the pump in vapor form.
After the pump has started, the gas ballast valve (see diagram on page 2) should
be opened until the system has reached approximately 1000 microns. At this
time, close the valve to allow the pump to pull its ultimate vacuum level. The
gas ballast valve may be opened or closed at any time during pump operation.
The valve is fully open at two turns, counterclockwise.
SHUTTING DOWN THE PUMP
Follow these procedures when shutting down your pump to ensure long life and
easy starting:
1. Shut off all gauges to the A/C system.
2. Close any valve beteween the pump and the A/C system.
3. Turn off the pump. Open the inlet port to the atmosphere immediately at
shutdown.
4. Cap the inlet port immediately to prevent any contamination or loose
particles from entering the port.
For maximum performance, Robinair recommends charging vacuum pump oil
after each use. Use only a high quality oil. Robinair recommends its Premium
High Vacuum Pump Oil, which has been specially blended to maintain
optimum viscosity at high and low operating temperatures.
CHANGING THE OIL
1. Verify the pump is warmed up and the inlet is opened to atmosphere.
2. Disconnect the pump from the A/C electrical power source.
3. Remove the black operating exhaust plug from the top of the pump
reservoir.
4. Hold the pump upside down, tilting it forward and backward to drain all
the oil from the reservoir into a suitable container.
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© 2000, SPX Corporation
Note:
If the drained oil is badly contaminated, the pump may need to be
flushed. If flushing is necessary, run the pump (CAUTION: To prevent
damage to the pump, do not run the pump more than 30 seconds
without any oil.) and slowly pour clean oil through the pump inlet (being
careful not to slug, or bog down, the pump). Drain the oil, and repeat this
procedure as necessary before going to Step 5.
5. Refill the pump reservoir to the “OIL LEVEL” line on the sight glass with
fresh Robinair High Premium Vacuum Pump Oil.
6. Replace the black operating exhaust plug.
CLEANING THE PUMP
Clean the pump with soap and water only. Do not use commercial cleaners that
contain degreasing agents that can damage polycarbonates. The pump handle
and base are made of Lexan*, one of the toughest polycarbonate plastics
available. However, it is sensitive to degreasing agents.
*Lexan is a registered trademark of General Electric
TROUBLESHOOTING TIPS
Before returning any Robinair vacuum pump, in or out of warranty, review the
following troubleshooting guide:
Failure To Pull Good Vacuum
1. Verify the gauge and connections are leak-free and in good condition. You
can confirm this by monitoring vacuum with a thermistor vacuum gauge
while applying vacuum pump oil at connections or suspected leak points.
The vacuum will improve briefly while the oil seals the leak, then revert to
the previous level.
Note:
Checking pump vacuum through a charging hose is not recommended.
Refrigerant and other contaminants contained in the hose may adversely affect
the vacuum reading.
2. Verify the pump oil is clean. A badly contaminated pump may require
several oil flushes (see “Changing the Oil”) before you are able to reach the
rated vacuum level.
3. Verify the oil is at the proper level. For proper vacuum operation, the oil
must be level with the sight glass oil line. Overfilling will not affect vacuum
operation, but may result in oil blowing from the exhaust during free air
operation.
4. Verify the gas ballast valve is fully closed.
Vacuum Pump Models 15234/15226/15296
5
FAILURE TO START
1. Check the line voltage. Your vacuum pump is designed to start at minus
ten percent of rated voltage and at 32oF (0oC). However, at or near these
extremes, there may be some hesitation in starting.
2. If the pump is accidentally shut down in a vacuum condition, the pump
may hesitate when restarted. This is because the vacuum pump oil has been
drawn into the pump module. The pump will run normally after clearing
the oil from the module.
Oil Leakage
1. Verify the oil is not a residual accumulation due to spillage, overfilling, or
similar causes.
2. If the pump is actually leaking oil, you may have to replace the O-ring in
the end shell or return the pump to the factory for servicing.
WARRANTY
Robinair high vacuum pumps are warranted against defects in material or workmanship for a period of one year of normal use from date of purchase. If within
one year from date of purchase, the vacuum pump should prove faulty due to
manufacturer error, return it to the distributor from whom you originally purchased
the vacuum pump. You must provide the distributor with proof of purchase and
the warranty claim check tag which is supplied with each vacuum pump.
Upon determining that a valid warranty claim exists, the Robinair distributor is
authorized to exchange the faulty vacuum pump for a new vacuum pump of the
same model at no additional charge. If a vacuum pump is returned for a warranty
claim and the claim is determined to be invalid, a minimum service charge plus
the cost of repair parts and return freight will be charged. Final determination of
valid warranty claims will be made by Robinair, Owatonna, MN.
The warranty shall not apply to any product or part which has been subject to
misuse, negligence, or accident. The Seller shall not be responsible for any
special or consequential damages, and the Warranty as set forth is in lieu of all
other warranties either expressed or implied.
However, the Seller makes no warranty of merchantability in respect to any
of the goods offered in the manual and any applicable manufacturer’s shop
or service manuals referred to therein, including any subsequent service
bulletins.
6
© 2000, SPX Corporation
OUT OF WARRANTY
Any Robinair high vacuum pump which is beyond the one-year warranty period
and fails to operate correctly should be returned to the distributor with a full
written explanation of the problem, or you may return it yourself to one of the
authorized Robinair Service Centers for repair. Go to Robinair.com or call
1-800-822-5561 for instructions on returning a pump.
Prior to returning an out-of-warranty pump, review all maintenance procedures
to avoid an unnecessary return. Note that contaminated oil or an incorrect oil
level will adversely affect pump performance. These conditions should be
checked before requesting service. Replacement parts are available if you desire
to repair your own pump. However, this should be considered only in out-ofwarranty situations.
SPECIFICATIONS
MODEL 15234 15226 15296
Number of Stages 222
Free air Displacement 1.2 cfm* 1.2 cfm* 1.0 cfm
Factory Micron Rating 50 50 50
Oil Capacity 5 oz. 5 oz. 5 oz.
Weight 10 lbs. 10 lbs. 10 lbs.
Width 4
Length 9
Height 8
Intake Fittings
Motor Size
Voltage 110-115V 220V 250V
Operating 185
Temperature 85
*1.2 cfm at 60 Hz
1 cfm at 50 Hz
148 ml 148 ml 148 ml
4.54 kg 4.54 kg 4.54 kg
1
/2"4
11.4 cm 11.4 cm 11.4 cm
13
/16"9
25 cm 25 cm 25 cm
1
/2"8
21.6 cm 21.6 cm 21.6 cm
1
/2" Acme
1
/4" MFL
1
/8 hp
1
/2"4
13
/16"9
1
/2"8
1
/2" Acme
1
/4" MFL
1
/8 hp
1
/2" Acme
1
/4" MFL
13
1
/8 hp
1
/16"
1
Capacitor Capacitor Capacitor
Start Start Start
50/60 Hz 50/60 Hz 50 Hz
o
F 185oF 185oF
o
C85
o
C85
o
/2"
/2"
C
Because of ongoing product improvements, we reserve the right to
change design, materials, and specifications without notice.
Vacuum Pump Models 15234/15226/15296
7
REPLACEMENT PARTS LIST
PART NO. DESCRIPTION
15195 Inlet Tee (1/4" MFL and 1/2" Acme)
41184 Handle (includes switch)
48104 Gas Ballast Valve
13191 Exhaust Plug
15135 Shell and Sight Glass Assembly
(no drain)
41186 Base and Foot Assembly
NOTICE: AIRBORNE NOISE EMISSIONS
This equipment has been tested for airborne noise emission per the Council Directive for Machinery (89/392/EEC) Section 1.7.4 Instructions — Essential Health
and Safety Requirements. Sound levels do not exceed 88 dB(A) actual value.
Call our toll-free
Technical Support Line
%
1-800-822-5561
in the continental U.S. or Canada
or visit our web site
www.robinair.com
In all other locations, contact your local distributor. 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 attached
to your unit and return it within ten days from date of purchase.
SPX Corporation
655 Eisenhower Drive
Owatonna, MN 55060-0995 USA
Technical Services: 1-800-822-5561
Fax: 1-800-822-7805
Customer Service: 1-800-533-6127
Fax: 1-800-322-2890
115249 (Rev. B 02/15/03)
8
Web Site: www.robinair. com
© 2000, SPX Corporation
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