Bacharach QV2 User manual

Product Leadership • Training • Service • Reliability
Vacuum Pump
Models QV2 & QV5
Instruction 2002-0010
Operation & Maintenance
Rev. 2 – February 2006

Notice:
Product improvements and enhancements are continuous, therefore the specifications and
information contained in this document may change without notice.
Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential
damages in connection with the furnishing, performance, or use of this material.
No part of this document may be photocopied, reproduced, or translated to another language
without the prior written consent of Bacharach, Inc.
Copyright © 2005–2006, Bacharach, Inc., all rights reserved.
BACHARACH is a registered trademark of Bacharach, Inc. All other trademarks,
trade names, service marks and logos referenced herein belong to their respective companies.
WARRANTY
Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects
in material and manufacture and will conform substantially to Bacharach Inc.’s applicable speci-
fications. Bacharach’s liability and Buyer’s remedy under this warranty are limited to the repair or
replacement, at Bacharach’s option, of this Product or parts thereof returned to Seller at the factory
of manufacture and shown to Bacharach Inc.’s reasonable satisfaction to have been defective;
provided that written notice of the defect shall have been given by Buyer to Bacharach Inc. within
one (1) year after the date of delivery of this Product by Bacharach, Inc.
Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach’s liability
and Buyer’s remedy under this warranty of title are limited to the removal of any title defects or, at the
election of Bacharach, to the replacement of this Product or parts thereof that are defective in title.
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU
OF (I) ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT
LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE: AND (II) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY
IN CONTRACT OR TORT, WHETHER OR NOT ARISING FROM BACHARACH’S NEGLIGENCE,
ACTUAL OR IMPLIED. The remedies of the Buyer shall be limited to those provided herein to the
exclusion of any and all other remedies including, without limitation incidental or consequential
damages. No agreement varying or extending the foregoing warranties, remedies or this limita-
tion will be binding upon Bacharach, Inc. unless in writing, signed by a duly authorized officer of
Bacharach.
A
Register Your Warranty by Visiting
www.bacharach-inc.com
Instruction 2002-0010

Instruction 2002-0010 1
Vacuum Pump Models QV2 & QV5
Contents
Introduction............................................2
Features...............................................2
TechnicalCharacteristics .................................3
PumpComponents.......................................3
Operation ..............................................4
OperatingPrecautions....................................4
Warnings:...........................................4
Cautions: ...........................................5
OverloadProtection......................................6
MaintenancePrecautions .................................6
Troubleshooting.........................................7
Replacing the Vacuum Pump Oil . . . . . . . . . . . . . . . . . . . . . . . . . . .8

2Instruction 2002-0010
Vacuum Pump Models QV2 & QV5
Introduction
Thank you for selecting Bacharach products for your refrigeration
equipment needs. To ensure your safety, and for the safe operation
of this equipment, please read, understand, and follow the informa-
tion contained in this instruction manual.
The Model QV2 and QV5 are two-stage, rotary vane vacuum
pumps designed to evacuate moisture and air from refrigeration
systems (e.g., R-12, R-22, R-134a).
Features
• Anti-oil-return – A check valve prevents pump-oil from entering
the evacuated system after the pump stops.
• Environment protection – A built-in filter eliminates oil mist,
and an oil-gas separator removes oil contamination from the
exhaust.
• Aluminum alloy motor casing – The motor casing is an alumi-
num alloy that has high rate of heat dissipation, which provides
for continuous pump operation.
• Two stage design – The second stage of the two-stage design
starts pumping at a lower pressure to pull a deeper ultimate
vacuum.
• High starting torque – Designed for low temperature and low
voltage operation, the pump will start in temperatures ≥40 °F
(≥5 °C), at its rated input voltage of 110 VAC ±10%.
• Oil circulation design – Offset rotary vanes work in conjunction
with the vacuum pump oil to create high compression within the
pumping chamber.

Instruction 2002-0010 3
Vacuum Pump Models QV2 & QV5
Technical Characteristics
Model QV2 QV5
Part No. 2002-0001 2002-0005
Voltage 110V 60 Hz 110V 60 Hz
Free Air
Displacement 1.7 CFM 5.3 CFM
Ultimate
Vacuum
25 microns
(0.03 mbar)
25 microns
(0.03 mbar)
Motor 1/4 HP 1/2 HP
Intake Fitting 1/4", 3/8", 1/2" Flare 1/4", 3/8", 1/2" Flare
Motor Speed 1,720 rpm 3,450 rpm
Oil Capacity 11.8 fl. oz (350 ml) 15.2 fl. oz (450 ml)
Dimensions 14.1 x 6.8 x 11.4 in
(358 x 172 x 290 mm)
14.1 x 7.1 x 11.8 in
(358 x 180 x 300 mm)
Weight 21.6 lb (9.8 Kg) 26.5 lb (12 Kg)
Pump Components
Exhaust CapExhaust Fitting
Sight Glass
Oil Tank
Oil Drain
Intake
Fittings
Reset
Button
Power
Switch
Fan
Cover
Motor
Base
Rubber Foot
AC Power
Plug
Oil Fill Access
(remove
exhaust fitting)

4Instruction 2002-0010
Vacuum Pump Models QV2 & QV5
Operation
Check the pump-oil level as viewed through the sight glass before
each use. Add oil, as necessary, by first unscrewing the exhaust
fitting and then adding oil through the oil fill access (use only high
grade vacuum pump oil).
Remove intake fitting cap and connect pump to the system being
evacuated using a hose with appropriate fittings. Keep the connec-
tion as short as possible, and ensure that all connections are sealed
and not leaking. If desired, use a vacuum gauge manifold set to
monitor the vacuum level.
Remove exhaust fitting cap; plug pump into an appropriate AC
outlet; and then turn ON pump to being the evacuation process.
After pumping is complete: turn OFF pump; disconnect power plug;
remove connecting hose; and reinstall intake and exhaust caps.
Operating Precautions
Warnings:
• Do not evacuate combustible, explosive, or poisonous gases.
• Do not operate the vacuum pump in the rain.
• Do not pull out or insert power plug, or turn ON the pump in an
explosive atmosphere.
• If using the pump in a confined area, connect a hose to the
pump’s exhaust fitting and route the hose to the outside.
• Power the pump from a grounded AC outlet. Consult a profes-
sional electrician to ensure proper grounding.
• Do not use a defective AC power plug or outlet.

Instruction 2002-0010 5
Vacuum Pump Models QV2 & QV5
Cautions:
• Do not evacuate gases that corrode metal or react chemically
with the pump oil.
• If the air being evacuated contains dust or is above 175°F (80°C),
then a filter or cooling device should be installed at the pump’s
intake.
• Do not operate the pump for more than 3 minutes with the in-
take open to the atmosphere.
• For proper cooling and air ventilation, keep the sides of the
pump at least 1" (2 cm) away from walls, and allow 2" (5 cm) for
the front and rear of the pump.
• Do not lay heavy objects on the power cord, or allow the power
cord to become pinched.
• Operate the vacuum pump in a dry, well ventilated area.
• Do not operate the pump below an ambient temperature of
40°F (5°C).
• Do not use as a compression pump or transfer pump.
• Do not operate without clean vacuum pump oil.
• Do not block the exhaust fitting when the pump is operating.
• When pulling out the power plug, grip the plug rather than
the cord.

6Instruction 2002-0010
Vacuum Pump Models QV2 & QV5
Overload Protection
If the vacuum pump motor stops because of an over current condi-
tion, first turn OFF the pump and open its intake to the atmo-
sphere. Press the Reset button located next to the Power switch,
and try restarting the pump. If the overload condition persists,
refer to Troubleshooting – Difficult starting on Page 7.
If the pump does not restart after pressing the Reset button, then
the vacuum pump motor has probably overheated causing its ther-
mal overload protector to open. Turn OFF the vacuum pump and
allow the motor to cool for at least 10 minutes, after which time the
thermal overload protector should automatically close.
Maintenance Precautions
Keep pump clean and avoid foreign matter from entering the pump.
Keep the vacuum pump oil at the correct level during normal
operation as viewed through the sight glass — do not run pump
without oil.
Replace the vacuum pump oil if the oil becomes dirty and looks
turbid, or contains water or other volatile matter. Refer to Replac-
ing the Vacuum Pump Oil on Page 8.
When storing the pump, install the intake and exhaust caps and
place the pump in dry location.
Only qualified technicians should attempt to disassemble and re-
pair the vacuum pump. Service performed by unauthorized person-
nel during the warranty period will void the pump's warranty. For
warranty repair, please call Bacharach Service at 724-334-5000.

Instruction 2002-0010 7
Vacuum Pump Models QV2 & QV5
Troubleshooting
Problem Probable Cause Remedy
Pump does not
produce desired
vacuum
Oil level low Add oil until level is correct
as viewed through sight glass
Oil emulsified or
dirty
Replace with fresh high
grade vacuum pump oil
Oil inlet or oil flow
is blocked
Clean oil inlet and filtering
screen
System leak Check system being evacu-
ated for leakage and repair
Pump too small Check the size of system
being evacuated and choose
proper pump
Pump worn Contact Bacharach Service
Oil leakage Oil tank screws
loose
Tighten oil tank screws
Oil seal or tank
gasket damaged
Contact Bacharach Service
Oil injection Too much oil in
tank
Drain oil until level is
correct as viewed through
sight glass
Pump too small Check the size of system
being evacuated and choose
proper pump
Difficult
starting
Oil temperature
too low
Open intake to atmosphere
and intermittently start
motor to heat pump oil
Foreign matter in
pump
Clean pump by replacing
vacuum pump oil
Motor defective Contact Bacharach Service

8Instruction 2002-0010
Vacuum Pump Models QV2 & QV5
Replacing the Vacuum Pump Oil
Using clean, fresh vacuum pump oil is a critical part of achieving
the desired vacuum.
When replacing the vacuum pump oil, first thin down the oil by
running the pump for 30 minutes with the intake closed.
Stop the pump, remove the exhaust fitting, remove the oil drain
plug and allow the oil to drain.
Note: The exhaust fitting must be removed to allow the oil to drain
due to a one-way valve located inside the fitting.
Run pump for 1–2 minutes with intake open while adding a small
amount of clean vacuum pump oil through the intake to flush out
any residual oil in the pumping chamber. Repeat this process sev-
eral times until the pump is clean.
Replace the oil drain plug, and then fill the oil tank through the
oil fill access with fresh vacuum pump oil to the desired level as
viewed through the sight glass.
After filling the oil tank, reinstall the exhaust fitting.

Instruction 2002-0010 9
Vacuum Pump Models QV2 & QV5
Exhaust Fitting
Sight Glass
Oil Tank
Oil Drain
Plug
Oil Fill Access
(remove
exhaust fitting)
Intake
Fittings
Oil Fill Access

Headquarters:
621 Hunt Valley Circle, New Kensington, PA 15068
Ph: 724-334-5000 • Fax: [phone] • Toll Free: 800-736-4666
Website: www.bacharach-inc.com • E-mail: [email protected]
Printed in U.S.A.