Thermo Scientific 420-1901 Manuale utente

OPERATING MANUAL

AIR CADET®PUMPS

MODEL NO. 420-1901

MODEL NO. 420-1902

A-1299-5102

Edition 03

Thermo Fisher Scientific

1-800-637-3739 (U.S. and Canada only)

11 (847) 381-7050 (Outside U.S.) • (847) 381-7050 (Local)

www.thermo.com • fluidhandling@thermofisher.com

TABLE OF CONTENTS

Title Page

SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Grounding Instructions (420-1901) . . . . . . . . . . . . . . . . . . . . . . . . 6

Grounding Instructions (420-1902) . . . . . . . . . . . . . . . . . . . . . . . . 7

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

PUMP HEAD REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . .11

SPECIAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

NOTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

PRODUCT RETURN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

TECHNICAL ASSISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

FLUOREL - Reg TM Minnesota Mining and Manufacturing Company

VALOX - Reg TM General Electric Co.

DACRON, VITON - 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.

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.

CAUTION: Do not use metal fittings with any Air Cadet Pump.

DESCRIPTION

The diaphragm-operated AIR CADET Pump is designed for pressure, suc-

tion and gas circulating applications. The convoluted diaphragm and the

unique pump cavity are designed to provide extended diaphragm life by

minimizing stress, wear and heat buildup. This has been done while ensur-

ing and optimizing pressure and vacuum characteristics.

The media being pumped will come in contact with VALOX®, FLUOREL®

DACRON®and VITON®. Polyethylene fittings are supplied. This provides

much better chemical resistance than conventional aluminum or stainless

steel pumps. The motor is painted with an epoxy paint.

The Pumps are available for 115V AC or 230V AC applications. They are

intended for either industrial or commercial use.

The brushless motor is totally enclosed, thermally protected and has

sealed ball bearings. No regular maintenance is required. A six-foot length,

three conductor power supply cord is supplied with the unit and the 115V

AC rated motor is a U.L. recognized component.

The polyethylene fittings provided with the pump will accept 3/8 in I.D. flex-

ible tubing.

Figure 1 shows the typical flow characteristics of the 420-1901 pump

as related to pressure and vacuum. The corresponding flow data for the

420-1902 Pump (230V AC) are 5/6 of those in Figure 1.

Note that, even though model 420-1902 is designed for 230V AC, 50 Hz

applications, it can be used on 230V AC, 60 Hz. In this case, the flow data

will increase to that of 420-1901; however, the available torque will

decrease. All AIR CADETS are intended to be started without load (both

ports open to atmosphere). If either a vacuum or pressure exists, the pump

may not start.

OPERATING INSTRUCTIONS

Model 420-1901 is supplied complete with a three-prong grounded plug.

Model 420-1902 is supplied with a two-prong grounded European-type

plug.

PLEASE NOTE:

This motor, when operated as outlined in this

manual, will run fairly hot. This condition is normal.

GROUNDING INSTRUCTIONS FOR 420-1901

This product should be grounded. In the event of an electrical short circuit,

grounding reduces the risk of electric shock by providing an escape wire

for the electric current. This product is equipped with a cord having a

grounding wire with an appropriate grounding plug. The plug must be

plugged into an outlet that is properly installed and grounded in accordance

with all local codes and ordinances.

DANGER: Improper use of grounding plug can result in a risk of electric

shock.

If repair or replacement of the cord or plug is necessary, do not connect the

grounding wire to either flat blade terminal. The wire with insulation having

an outer surface that is green with or without yellow stripes is the ground-

ing wire. Check with a qualified electrician or serviceman if the grounding

instructions are not completely understood, or if in doubt as to whether the

product is properly grounded. Do not modify the plug provided; if it will not

fit the outlet, have the proper outlet installed by a qualified electrician.

This product is for use on a nominal 120 volt circuit and has a grounding

plug that looks like the plug illustrated in Figure 2(A). A temporary adapter,

FIGURE 1

which looks like the adapter illustrated in Figure 2(B) and (C) may be used

to connect this plug to a 2-pole receptacle as shown in Figure 2(B) if a

properly grounded outlet is not available. The temporary adapter should be

used only until a properly grounded outlet, Figure 2(A), can be installed by

a qualified electrician. The green colored rigid ear, lug or the like extending

from the adapter must be connected to a permanent ground such as a

properly grounded outlet box cover. Whenever the adapter is used, it must

be held in place by a metal screw.

Note: In Canada, the use of a temporary adapter is not permitted by the

Canadian Electric Code.

GROUNDING INSTRUCTIONS FOR 420-1902

Refer to a qualified electrician to install the proper plug on the motor cord

and to supply the proper electrical outlet.

Extension Cords

Use only a 3-wire extension cord that has a 3-blade grounding plug and a

3-slot receptacle that will accept the plug on the product. Make sure your

extension cord is in good condition. When using an extension cord, be sure

to use one heavy enough to carry the current your product will draw. An

undersized cord will cause a drop in line voltage resulting in loss of power

and overheating. The correct size to use depending on cord length and

nameplate ampere rating is No. 18 AWG, 3 conductor up to 100 feet. If in

doubt, use the next heavier gage. NOTE: The smaller the gage number, the

heavier the cord.

FIGURE 2

GROUNDED OUTLET ADAPTER

METAL

SCREW

COVER OF GROUNDED

OUTLET BOX

GROUNDING PIN

ADAPTER

GROUNDING

MEANS

(A) (B)

(C)

Operation

Wrap the PTFE sealing tape supplied around the fitting thread (to

eliminate any possible leakage) and assemble into the port. DO NOT

OVERTIGHTEN! Use only a single turn of tape—hand tighten—then give

one more turn with a wrench. Instead of the standard fittings supplied with

the pump, any other appropriate system can be attached to the pump.

CAUTION: Do not operate pump when pressure ports of both heads are

in a blocked condition.

A muffler can be used at the outlet to decrease the noise level if desired.

Usually, three feet lengths of tubing at both ends is more than adequate for

quiet operation. If the air or gas being pumped is relatively dirty, use of an

air filter is desirable. Otherwise, excessive amounts of dust and other par-

ticles will collect at the valve seats. This may interfere with the proper seat-

ing of the valves and will decrease flow, pressure and vacuum characteris-

tics and may make the flow values erratic.

Sudden changes in the diameter of system tubes, fittings, bends and other

obstructions will increase pressure and/or vacuum in the system and will

decrease the available flow. Intentional reduction in flow can be achieved

by a simple valve or pinching of the tube at inlet (preferred for the

diaphragm life) or outlet systems.

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.

The motor is supplied with an internal thermal overload switch which may

trip if something happens to the pump. If this should occur, check the pump

to ensure that everything is normal. Allow motor to cool for approximately

30 minutes, then restart. If overload trips again, return the complete unit to

your dealer for repair.

DANGER: Unplug power cord before any cleaning operation is started.

When the pump is not in use, store in a clean, dry area. If ports on pump

are open, cover to keep dust and dirt from entering. Wipe power cord

down with dry towel and inspect for cracks in insulation after each use.

Have cord repaired, if found defective, prior to reusing.

SPECIFICATIONS

MODEL NO. 420-1901 420-1902

Power 100-115 ± 10%, V AC, 60 Hz, 1.2A 230 ± 10%, V AC, 50 Hz, 0.75A

Air Capacity 1050 Cu. Inch per min 900 Cu. Inch per min

Max. Pressure 18/21 psig* 18/21 psig*

Max. Suction 23 Inches Hg** 23 Inches Hg**

Motor 1/50 hp at 1550 rpm 1/50 hp at 1300 rpm

Pump-Motor Dimensions 8 in L x 4 in W x 4.25 in H*** 8 in L x 4 in W x 4.25 in H***

Motor Dimensions 5.25 in L x 4 in W x 4.25 in H*** 5.25 in L x 4 in W x 4.25 in H***

Port Connections 3/8NPT 3/8NPT

*Intermittent Duty: Limit output to 21 psig

Continuous Duty: Limit output to 18 psig

**Intermittent or Continuous Duty

*** Polyethylene fittings not included in height dimensions

SPECIFICATIONS (CONT.)

Models 420-1901, and 420-1902

Operating Temperature Range: 0° to 40° C (32° to 104° F)

Humidity Range: 10% to 90% non-condensing

Altitude: Less than 2000 m

Pollution Degree: Pollution Degree 2

(Indoor usage - lab, office)

Enclosure Rating: IP 20 per IEC 60529

Weight: 2.7 kg (6 lbs)

Compliance: 115V: UL1450, CSA C22.2,

No. 68

230V (For CE Mark):

EN61010-1

(EU Low Voltage Directive) and

EN61326

(EU EMC Directive)

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