User guide

114614 (Rev. C, April 8, 2014)
© Bosch Automotive Service Solutions LLC
WARNING
When working with high pressure air sup plies and
refrigerants, wear goggles to reduce the hazards
of ying particles and contact with refrigerants.
The Air-Vac is a venturi-type vacuum pump powered by
compressed air and designed for mobile air conditioning
service.
Operating Notes
A constant air source of 75 psi is required for pump
operation. The pump has an air consumption of
4.2 SCFM and will pull a vacuum up to 29.7 inches of
mercury at sea level.
Oil or water in the air line will not harm the pump; it
will be exhausted through the pump.
Connecting the Pump
1. Connect a constant (75 psi) air source to the air
input tting located on the back of the pump. This
tting is a standard
1
/
4
in. N.P.T.F.
Note: Use a quick-disconnect tting on the air input
tting for fast, easy connections to the air supply.
2. Connect the center hose from a manifold gauge set,
which is connected to the A/C system, to the vacuum
tee tting (appropriate for the type of system —
R-12 or R-134a) on the front of the pump. Tightly
cap the port not used. Open both valves on the
manifold.
3. Turn on the air supply to evacuate the system.
Follow the vehicle manufacturer’s specications for
correct evacuation.
4. Turn off the air supply before disconnecting the
hose from the vacuum tting.
Model No. 34970
Air-VAc™ for r-12 And r-134A
Because of ongoing product improvements,
we reserve the right to change
design, specications, or materials without notice.
655 Eisenhower Drive
Owatonna, MN 55060 USA
Technical Services: 1-800-822-5561
Fax: [phone]
Customer Service: 1-800-533-6127
Fax: [phone]
www.robinair. com