Thermo Scientific Air Cadet User manual

OPERATING MANUAL
VACUUM/PRESSURE STATION
MODEL NO. 420-3901 (115V AC)
MODEL NO. 420-3902 (230V AC)
A-1299-5105
Edition 05
Thermo Fisher Scientific
1-800-637-3739 (U.S. and Canada only)
11 [phone] (Outside U.S.) • [phone] (Local)
www.thermoscientific.com • [email protected]

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TABLE OF CONTENTS
Title Page
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Grounding Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
PUMP HEAD REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . .14
SPECIAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
NOTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
PRODUCT RETURN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
TECHNICAL ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
VALOX - Reg TM General Electric Co.
DACRON - Reg TM E.I. DuPont de Nemours and Co.
Trademarks bearing the ® symbol in this publication
are registered in the U.S. and in other countries.
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SAFETY PRECAUTIONS
DANGER: Improper use of grounding plug can result in a risk of electric
shock.
DANGER: Unplug power cord before any cleaning operation is started.
WARNING: Gas under pressure should not be used for supply as a
hazardous bursting condition could develop in the Pump
Head. Use only gases contained at atmospheric pressure.
CAUTION: Do not operate pump when pressure ports of both heads are
in a blocked condition.
CAUTION: Do not use metal fittings with any Air Cadet Pump.
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DESCRIPTION
The Vacuum/Pressure Station is designed to provide a convenient,
portable source of regulated vacuum and/or pressure for bench-top
laboratory or commercial use. Each function is regulated independently by
clearly identified valves and the easy-to-read compound function gauge
eliminates the need for an elaborate plumbing network. The convoluted
diaphragm and the unique head cavity of the pump are designed to provide
extended diaphragm life by minimizing stress, wear and heat buildup. This
has been done while ensuring and optimizing pressure and vacuum
characteristics. The brushless pump motor is totally enclosed, thermally
protected and has sealed ball bearings. No regular maintenance of the
motor is required. A six foot long, three conductor power supply cord
is supplied with the unit and the 115V AC motor is a U.L. recognized
component.
Figure 1 shows the typical flow characteristics of the 115V station as
related to pressure and vacuum. The corresponding flow data for the 230V
station are 5/6 of the values shown in Figure 1. Also note that, even though
model 420-3902 is designed for 50 Hz applications, it can be run on 230V
AC, 60 Hz line current. In this condition, the flow data will equal that of the
420-3901 station but available torque will decrease. All units are intended
to be started without load (both ports open to atmosphere). If either a
vacuum or pressure exists, the pump may not start.
Always consider material compatibility before running any service through
the Vacuum/Pressure Station.
The Materials in contact with the service are as follows:
1) Pump — VALOX®(polyester), DACRON®and FKM rubber.
2) Manifold chamber and fittings — PVC, silicone, linear polyethylene
and stainless steel 303.
3) Pressure/Vacuum Gauge — Bronze tubing and brass socket.
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