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High Performance Vacuum Pump
Model 15120A/15122A
Operating Manual .................................. 2
Bombas de Vacío de Alto Rendimiento
Modelo 15120A/15122A
Manuel del Operador ............................ 8
Pompe à Vide à Haut Rendement
Modèle 15120A/15122A
Manuel d’utilisation ............................ 16
Hochleistungs-Vakuumpumpe
Modelle 15120A/15122A
Bedienungsanleitung.......................... 24
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Table of Contents
Warnings ............................................................... 2
CoolTech
Before using your vacuum pump .......................... 3
To use the gas ballast feature ............................... 4
To shut down your pump after use ....................... 4
To maintain your high vacuum pump .................... 4
Troubleshooting guide .......................................... 5
CoolTech
When you need help ............................................. 6
Replacement parts ................................................ 6
Warranty coverage ................................................ 6
Operating Manual
®
high performance
vacuum pumps ................................................. 2
Pump components ........................................... 3
Vacuum pump oil ............................................. 4
Oil change procedure ....................................... 4
Cleaning your pump ......................................... 5
Motor lubrication ............................................... 5
Failure to start .................................................. 5
Oil leakage ....................................................... 5
Failure to pull a good vacuum .......................... 5
®
specifications ....................................... 5
Out of warranty ................................................. 6
For use on A/C-R 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.
U.S Patents 4,523,897; 5,209.653.
Other U.S. and Foreign Patents Pending.
CoolTech® High Performance
Vacuum Pumps
Congratulations on purchasing one of Robinair’s
top quality CoolTech® vacuum pumps. Your pump
has been engineered specifically for air conditioning and refrigeration service, and is built with
Robinair’s proven offset rotary vane for fast,
thorough evacuation.
You’ll appreciate these key features...
Iso-Valve
Allows the pump to be shut off while still connected
to the A/C-R system, which is handy for checking
rate of rise. With the valve handle in the “Open”
position, the pump is open to the system being
evacuated. In the “Close” position, the pump is
isolated from the system.
High vacuum rating
The two-stage, offset rotary vane design provides
powerful, quiet high vacuum capability and assures
moisture removal, while the high pumping capacity
reduces evacuation time.
Lifetime Filtration
The intake filter prevents foreign matter from
entering the pumping chamber, and an exhaust
filter separates oil vapor from the exhaust flow.
Gas ballast
A precise amount of atmospheric air is introduced
into the pump, preventing condensation of moisture
vapor and helping maintain the purity of the pump
oil. By using the gas ballast, the pump operates
more efficiently and pump life is extended.
Sure-grip handle
The one-piece, molded handle makes it easy to
carry the pump to and from job sites, and the
handle stays cool to the touch during operation.
Compact design
Your pump measures approximately 42 cm
(16
rotary vanes keep the pump weight low, making
it easy to carry.
TM
1
/2") long, while aluminum housing and offset
Warnings
When working with refrigerants, goggles
should always be worn. Contact with
refrigerants may cause injury.
Improper use or connections may cause
electrical shock hazards. Read and follow
the instructions carefully and take
precautions to avoid electrical shock
hazards. Be sure that all associated
devices are properly grounded before
energizing circuits.
The normal operating temperature will
cause certain external portions of the
pump to be hot to the touch. Do not touch
1
the pump housing or motor during
operation.
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 80dB(A)
actual value.
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10
12
11
1
2
3
4
5
Operating Manual
9
8
7
6
Pump components
1. Intake Fitting
2. Gas Ballast Valve (located
beside handle)
3. Exhaust Filter
4. Oil Fill Port
5. Sight Glass
6. Die-Cast Aluminum Housing
7. Oil Drain
8. Molded Polycarbonate Base
9. Iso-Valve
from the system
10. Powerful, High Torque Motor
11. Power Switch
12. Sure-Grip Handle
TM
— Isolates the pump
Before using your
vacuum pump
In all cases, motors are designed for operating
voltages plus or minus 10% of the normal rating
(see SPECIFICATIONS). Single voltage motors are
supplied fully connected and ready to operate.
1. Check to make certain the voltage and
frequency at the outlet match the specifications on the pump motor decal. Check the ONOFF switch to be sure it is in the OFF position
before you plug the pump into an outlet. Check
to be certain the gas ballast valve is closed.
Remove and discard the red plastic plug from
the top of the oil reservoir.
2. The pump is shipped without oil in the
reservoir. Before starting the pump, fill with oil
until oil just shows in the bottom of the sight
glass. The approximate oil capacity of the
pump is 488 milliliters (16
3. Thread in the exhaust filter (hand tighten) and
remove the cap from one of the inlet ports.
Turn the Iso-Valve to OPEN. Turn the motor
switch to ON. When the pump runs smoothly,
turn the Iso-Valve to CLOSED and replace the
cap on the inlet port. This may take from two to
30 seconds depending on the ambient
temperature. After the pump runs for approximately one minute, check the sight glass for
proper oil level — oil should be even with the
sight glass OIL LEVEL line. Add oil if necessary.
When the pump is running, the oil level should be
even with the OIL LEVEL line. Underfilling will
result in poor vacuum performance. Overfilling can
result in oil blowing from the exhaust.
Your pump is now ready to evacuate air conditioning and refrigeration systems. Follow normal
service procedures and the A/C-R manufacturer’s
instructions for connections to the system.
CAUTION! Before connecting your vacuum pump
to an A/C-R system, remove refrigerant from the
system in an accepted manner. Damage to the
pump may occur if evacuation is started while the
system is under high pressure. Robinair recommends use of our Refrigerant Recovery and
Recycling equipment.
1
/2 ounces).
WARNING: Failure To Remove Red
Plastic Plug May Result In Bodily Injury.
2
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Wiring Instructions (15121A):
The CoolTech vacuum pump features dual voltage
ranges. Before operating the pump, read and follow
these rewiring instructions (if necessary) to be sure
your pump is wired for the appropriate voltage.
CAUTION! Unplug the unit before beginning any
service work. Improper use or connections can
cause electrical shock. Only qualified personnel
should perform service work.
The CoolTech vacuum pump is factory wired for a
high voltage of 220 volts. To wire the switch for a
low voltage range of 110 volts to 127 volts, follow
these steps.
1. Disconnect the unit from the AC power source
before proceeding.
2. Loosen the screws on the plate at the rear of
the motor, and carefully move the plate aside
to clear the opening.
3. Disconnect the leads and reconnect for low
voltage, following the diagram and chart.
(High voltage connections are also shown
if you want to rewire at some time.)
4. Check to see that all connections are secure
and that there are no short circuits. Be sure
the grounding connector is properly connected.
5. Reinstall the plate on the rear of motor with the
screws which were loosened in Step 2.
IMPORTANT: Check for short circuits using a
continuity tester before reconnecting to the AC
power source.
ELECTRICAL CONNECTION TABLE
115V
WIRE TERMINAL No.
WHITE 4
BLACK 2
RED 5
BROWN 3
Operating Manual
LINE 1 & 4
To use the gas ballast feature
Moisture from the A/C-R system that is carried into
the pump as a vapor tends to condense into a
liquid and combine with the vacuum pump oil.
When moisture contaminates the pump oil, it
reduces the pump’s ability to reach its ultimate
deep vacuum level.
The gas ballast valve purges a small amount of
atmospheric air through the exhaust chamber. This
extra volume of air mixes with the vapor from the
refrigerant system to prevent condensation and to
help exhaust moisture in the form of vapor from the
pump.
To use the gas ballast, start the pump and open
3
the gas ballast valve until the system has reached
15121A
EMERSON MOTOR
WIRE TERMINAL No.
WHITE 3
BLACK 3
RED 5
BROWN 6
LINE 1 & 4
220V
INST0759
approximately 1000–3000 microns. Close the valve
to allow the pump to pull down to its ultimate
vacuum level. The gas ballast valve is located
beside the handle, opposite the inlet fitting.
The gas ballast valve may be opened or closed at
any time during pump operation. It is fully open at
two turns counterclockwise.
NOTE:
Robinair recommends the use of a thermistor vacuum gauge to most accurately measure
vacuum levels.
To shut down your
pump after use
To help prolong pump life and promote easy
starting, follow these procedures for shutdown:
1. Close the manifold valve between the pump
and 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 for a few
seconds to relieve any vacuum inside the pump.
5. Cap the inlet port to prevent any contamination
or loose particles from entering the port.
To maintain your high
vacuum pump
For maximum performance, Robinair recommends
changing vacuum pump oil after each use.
Vacuum pump oil
The condition and type of oil used in any high vacuum
pump are extremely important in determining the
ultima te attain able vacu um. Robinai r recommends the use of our Premium High Vacuum
Pump Oil. This oil has been specifically blended to
maintain maximum viscosity at normal running
temperatures and to improve cold weather starts.
Robinair Premium High Vacuum Pump Oil is
available in convenient pint, quart or gallon
containers. Order by part number:
13201 — Pint (shipped 12 pints per case)
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 contaminated oil into a suitable container and dispose
of properly. Oil can be forced from the pump
by opening the inlet and partially blocking the
exhaust with a cloth while the pump is running.
Do not operate the pump for more than 20
seconds using this method.
3. When the flow of oil has stopped, tilt the pump
forward to drain residual oil.
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4. Replace the OIL DRAIN cap. Remove the
exhaust filter and fill the reservoir with new
vacuum pump oil until the oil just shows at the
bottom of the sight glass. The approximate oil
1
capacity of the pump is 488 milliliters (16
/
2
ounces).
5. Be sure the inlet ports are capped, then turn
ON the pump. Allow it to run for one minute,
then check the oil level. If the oil is below the
sight glass OIL LEVEL line, add oil slowly (with
the pump running) until the oil reaches the OIL
LEVEL line. Replace the exhaust filter (hand
tighten), making sure the inlet is capped and
the drain cap is tight.
6. If the oil is badly contaminated with sludge that
forms when water is allowed to collect in the
oil, you may need to remove the oil reservoir
cover and wipe it out.
Repeat this procedure as required until the contamination is removed. Replace the OIL DRAIN cap and
refill the reservoir to the proper level with fresh
pump oil (see Step 4).
Cleaning your 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
Motor lubrication
After three years of normal service or one year of
heavy-duty service, add oil annually. Use electric
motor oil or SAE 10 oil.
Troubleshooting guide
Your CoolTech pump has been designed for dependable use and long life. If something should go
wrong, however, the following guide will help you get
the pump back into service as quickly as possible.
If disassembly of the pump is required, please
check your warranty. The warranty may be voided
by misuse or customer tampering which results in
the pump being inoperable.
Failure to start
Check the line voltage. Robinair pumps are designed to start at +10% line voltage at 0oC (32oF).
At extremes, however, switching between the start
and run windings may occur.
Oil leakage
1. Be sure the oil is not a residual accumulation
from spillage, etc.
2. If leakage exists, the module cover gasket or
the shaft seal may need replacing. Follow the
instructions in the seal replacement kit, part
number 15367. If leakage exists in the area of
the oil drain plug, you may need to reseal the
plug using a commercial pipe thread sealer.
Failure to pull a good vacuum
1. Be sure the Iso-Valve is in the OPEN position.
2. Be sure the vacuum gauge and all connections
are in good conditon and leak-free. You can
confirm leakage by monitoring the vacuum
with a thermistor gauge while applying vacuum
pump oil at connections or suspected leak
points. The vacuum will improve briefly while
the oil is sealing the leak.
3. Be sure the pump oil is clean. A badly contaminated pump may require several oil flushes.
See OIL CHANGE PROCEDURE.
NOTE:
Use only high vacuum pump oil such as
Robinair’s Premium High Vacuum Pump Oil. Other
oils will prevent pull-down to a deep vacuum.
4. Be sure the gas ballast knob is tightly closed.
5. Be sure the oil is at the proper level. For
maximum pump operation, the oil must be
even with the OIL LEVEL line on the sight
glass when the pump is running. Do not
overfill. To check the oil level, start the pump
with the inlet capped. Add oil if necessary.
CoolTech® specifications
Model 15120A
Frequency Range .......................................... 60 Hz
Voltage Range ................................................ 115V
Free Air Displacement .................. 283 l/m (10 cfm)
Stages ................................................................... 2
Motor Speed ............................................ 1725 rpm
Factory Micron Rating ............................20 microns
Approximate Oil Capacity ............ 488 ml (16
Weight ......................................... 17.24 kg (38 lbs.)
Width .............................................. 14.29 cm (5
Height ............................................. 27.3 cm (10
Length ............................................ 41,9 cm (16
Intake ....................................
1
/2" and 1/4" SAE MFL
Min. Starting Temp. (at 90% Voltage) .... 0
Motor Size ............................
1
/2 HP, Capacitor Start
Operating Temp. ................................ 74
Model 15122A
Frequency Range ..................................... 50/60 Hz
Free Air Displacement .................. 283 l/m (10 cfm)
236 l/m @ 50 Hz
Stages ................................................................... 2
Motor Speed ................................... 1450/1725 rpm
Voltage Range ................................................ 240V
Factory Micron Rating ............................20 microns
Approximate Oil Capacity ............ 488 ml (16
Weight ......................................... 18.60 kg (41 lbs.)
Width .............................................. 14.29 cm (5
Height ............................................. 27.3 cm (10
Length ............................................ 44,5 cm (17
Intake ....................................
1
/2" and 1/4" SAE MFL
Min. Starting Temp. (at 90% Voltage) .... 0
Motor Size ............. 0,37 kw (
1
/2 HP) Capacitor Start
Operating Temp. ................................ 74
1
/2 oz.)
o
C (32oF)
o
C (165oF)
1
/2 oz.)
o
C (32oF)
o
C (165oF)
5
3
1
5
3
1
/8")
/4")
/2")
/8")
/4")
/2")
Operating Manual
4
Page 6
NOTE:
1. All motors are internally protected (automatic
reset).
2. Operating temperatures are typical for normal
operating conditions.
When you need help
If these procedures do not correct the problem,
contact your nearest Robinair distributor. The
distributor may recommend an additional replacement part (this manual contains a parts list) or
suggest you send your pump to the nearest
authorized service center.
Because of ongoing product improvements, we
reserve the right to change design, specifications, or materials without notice.
Replacement parts
Part Figure Part No.
Oil Drain Cap (6) 1 40572
Oil Drain Kit (includes # 1, 2) -- 48116
Module Cover Kit(# 1, 2, 3, 5, 18) -- 15139
Exhaust Filter 4 15147
Gas Ballast Knob and Seal 7 15371
Intake Fitting (includes # 8, 9, 10) -- 15364
Intake Cap (2),
Intake Cap (6),
Handle Bolt (includes O-ring) 11 15146
Handle, Power Cord, Switch Assy. 12 15366
15120A Motor and Handle Assy. 13 15136
15122A Motor and Handle Assy. 13 15143
Coupling 14 48103
Iso-Valve
Base and Foot Assembly 16 15369
Pump Assembly (# 1-10, 14-19) -- 15138
Seal Replacement Kit (not shown) -- 15367
1
/2" SAE MFL 9 41135
1
/4" SAE MFL 10 41139
TM
Assembly 15 15368
Warranty coverage
12
Operating Manual
13
14
Robinair CoolTech vacuum pumps are warranted
against defects in material and workmanship for one
year of normal use from the date of purchase. See
your distributor for warranty details.
Out of warranty
A pump which is no longer covered by the one-year
warranty period and which fails to operate properly
should be returned to the distributor with a full written
explanation of the problem. Before returning an out-ofwarranty pump, review all maintenance procedures
to avoid an unnecessary return. Replacement parts
are available for doing your own service.
11
9
8
10
7
6
5
15
4
16
17
18
19
3
2
1
INST0189
5
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Call our
International Customer Service Line at
%
1- 507- 455-7223
or email our Technical Support at
Robinairtechsupport@servicesolutions.spx.com
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.
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.
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
Web Site: www.robinair. com
122939 (Rev. B, 04/30/03) Model 15120A/15122A CoolTech® Vacuum Pump © SPX Corporation
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