Ashcroft L - Pressure switches Bedienungsanleitung PDF herunterladen

Installation and Maintenance Instructions

for ASHCROFT

L-Series Snap Action

Switches for Pressure Control

OPERATION

The ASHCROFT

pressure control is a precision device which

features a snap action switch.Fixed deadband is available with

single or dual SPDT independently adjustable switches with

various electrical ratings. Adjustable deadband is available with

SPDT switch with various electrical ratings. Several wetted

material constructions for compatibility with pressure media may

be obtained.

Series LP-S switches have a fixed deadband which will be

within the limits noted on the nameplate.

Series LP-D switches may be set to operate simultaneously or

up to 85 percent of the range apart.The deadband of each

switch will be within the limits noted on the nameplate.

Series LP-A switches may be set to operate with any

deadband within the limits shown on the nameplate.

MOUNTING

The

“L” Series ASHCROFT snap action pressure switch has a

NEMA-4 enclosure which is an epoxy coated aluminum casting.

o holes in the integ

al br

ack

et are used to surface mount

the control. Location of these holes is shown on the general

dimension drawings. An optional pipe mounting bracket is also

available.Mount on a vibration free surface or pipe in any orien-

tation.When tightening control to pressure line, always use the

wrench flats or hex on the pressure connection.

NEVER

TIGHTEN BY

TWISTING

THE CASE.

CONDUIT CONNECTIONS

One

⁄

4 NPT hole fitted with a shipping plug, and tw

o additional

knock outs are provided.The knockouts may be removed by

placing a screwdriver in the slot and rapping sharply with a

hammer It is recommended that Teflon tape or other sealant be

used on conduit bushings or plug threads to ensure integrity of

the enclosure.

ELECTRICAL CONNECTION

Remove cover, held in place by two screws.

On all units except one with ter

minal bloc

ks – wire directly to

the switch according to circuit requirements. Units with terminal

locks – wire directly to terminal blocks as required.Terminals

are marked common (C), normally open (NO) and normally

closed (NC).

4.12

(105)

2.25

(57)

2.50

(

64)

0.25

(

3.98

(101)

0.43

(11)

PRESSURE PORT

1/4 NPT FEMALE

.09

(155)

2.06

(52)

3.26

(83)

1.21

(31)

0.38

(10)

3.94

(100)

4.72

(120)

3/4 NPT

X06

/2 NPT MALE &

1/4 NPT FEMALE

4.12

(

105)

Ø5 .12

(130 )

3.2 6

(83)

4.65

(

1 1 8)

3.94

(1 0 0)

0.38

(1 0)

1.2 1

(31 )

2.06

(52 )

6. 09

(155 )

3/4 NPT

1/4 NPT

FEMALE

psi Ranges

in.H

O Ranges

1 2 3

LEFT SWITCH

TERMINAL BLOCK

RIGHT SWITCH

TERMINAL BLOCK

SERVICE LEADS TO THESE TERMINALS

STANDARD RANGES

15, 30, 60, 100, 200, 400, 600 psi

*1000, 2000, 3000 psi

30˝Hg vac.-0 psi

STANDARD RANGES

30, 60, 100, 150 in.H

15 in.H

O-15 in. H

2.7 lbs.

3.4 lbs.

2007 Ashcroft Inc., 250 East Main Street, Str

atford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0499, www.ashcroft.com

1 2

Inhaltsverzeichnis

Seite 1 - Switches for Pressure Control

Installation and Maintenance Instructions for ASHCROFT®L-Series Snap Action Switches for Pressure ControlOPERATIONThe ASHCROFT®pressure control is a p

Seite 2

SETPOINT ADJUSTMENTSSetpoints are changed by means of the setpoint adjusters TheLP-S single switch has one adjuster and the LP-A adjustabledeadband an

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Ashcroft L - Pressure switches Bedienungsanleitung

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Inhaltsverzeichnis

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