Ashcroft A Series Installation And Maintenance Instructions

Installation and Maintenance Instructions

for Ashcroft A-Series Miniature

Watertight Pressure Switches

ADJUSTMENT

COVER

ADJUSTMENT

COVER

SLIDE COVER DOWN TO ACCESS

SLIDE COVER DOWN TO ACCESS

SETPOINT ADJUSTMENT. SLIDE COVER

SETPOINT ADJUSTMENT SLIDE COVER

UP TO CLOSE AND SEAL ADJUSTMENT

UP TO CLOSE AND SEAL ADJUSTMENT

INTRODUCTION

The APS and APA pressure switch have NEMA 6, IP 67 Rated

316 stainless steel housing and process connections. The

APS has a factory fixed setpoint which cannot be changed

in the field. The APA is field adjustable and can easily be ad-

justed by following the instructions in the diaphragm above.

ELECTRICAL CONNECTION

The APS and APA switch is available with many various elec-

trical connections. Refer to the figures on other side for wiring

color codes and identification of terminals. Depending on the

configuration, the Micro DIN mating connector may or may

not be supplied with the switch.

• Only trained and skilled personnel are allowed to attach the

wires to the electrical terminals of the switch.

• Cable couplers, glands and conduit connectors must have

the correct electrical approvals as required by local electrical

codes.

© 2022 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0499, www.ashcroft.com

All sales subject to standard terms and conditions of sale. I&M009-10045-10/11 (250-2966) Rev. 03/22

FIELD ADJUSTABLE

FIELD ADJUSTABLE

ROTATE LEFT <

ROTATE LEFT <––––

TO INCREASE SET POINT

TO INCREASE SETPOINT

ROTATE RIGHT

ROTATE RIGHT ––––>

TO DECREASE SETPOINT

TO DECREASE SET POINT

Ø .095 OR SMALLER TOOL

.095 OR SMALLER TOOL

REQUIRED TO ROTATE NUT

REQUIRED TO ROTATE NUT

FACTORY SET

FACTORY SET

>

• The ground wire/connector is connected to the switch

housing.

• Fully insulated mating spade terminals must be used on all

spade terminal connections to prevent a shock hazard and

maintain compliance with approvals.

MICRO

SWITCH RATINGS

CODE

VAC RATING

H

5A @ 125/250VAC

P

3A @ 125VAC

G

0.1 A @ 125VAC

L

1A @125VAC

L

1A @125VAC

SIL 3 CAPABLE

LOOK FOR THESE MARKS

ON OUR PRODUCTS

VDC RATING

5A @ 28Vdc resistive

3A @ 28Vdc inductive

2A @ 30Vdc resistive

0.1A @ 30Vdc resistive

1A @ 28Vdc resistive

0.5A @ 28Vdcinductive