Air Cadet 420-3901, 420-3902 Instruction Manual

OPERATING MANUAL

VACUUM/PRESSURE STATION

MODEL NO. 420-3901 (115V AC)
MODEL NO. 420-3902 (230V AC)

A-1299-5105

Edition 02

Thermo Fisher Scientific

1-800-637-3739 (U.S. and Canada only)
11 [phone] (Outside U.S.) • [phone] (Local)
www.thermo.com • [e-mail]

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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

FLUOREL - Reg TM Minnesota Mining and Manufacturing Company
VAL OX - Reg TM General Electric Co.
VITON - Reg TM E.I. DuPont de Nemours and Company
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 haz-

ardous 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.

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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), FLUOREL®and VITON®.

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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