Greystone Energy Systems AFS Series Catalog Page

PRESSURE SWITCH

AFS Series

AFS-262

AFS-222-112

Precision pressure
control/sensing

FEATURES:

•

The plated housing contains a diaphragm, a calibration

spring and a snap-acting SPDT switch.

•

The sample connections located on each side of the
diaphragm accept 6.35mm (0.25") OD tubing via the
integral compression ferrule and nut or barbed tting.

•

An enclosure cover guards against accidental contact
with the live switch terminal screws and the set point
adjusting screw. The enclosure cover will accept a

12.7mm (0.5") conduit connection.

AFS-460

•

Optional pressure ranges and manual resets available.

Peace of mind

through reliable

pressure monitoring

GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

SPECIFICATIONS:

MODEL AFS-222/AFS-222-112 AFS-262/AFS-262-112 AFS-460/AFS460-112

Sample Media Air Air Air

Mounting Position Diaphragm in any vertical Diaphragm in any vertical Diaphragm in any vertical

plane plane plane

Field Adjustable Range 0.05±, 0.02" w.c. to 12" w.c. 0.05±, 0.02" w.c. to 2" w.c. 0.40±, 0.06" w.c. to 12" w.c.

Switch Dierential Progressive, increasing from Progressive, increasing from Progressive, increasing from

approx. 0.02± 0.01" w.c. at 0.02± 0.01" w.c. at min. set approx. 0.06± 0.01" w.c. at
min. set point, to approx. point to approx. 0.1" w.c. at min. set point, to approx.

0.8" w.c. at max. set point max. set point 0.8" w.c. at max. set point

Maximum Pressure 0.5psi (0.03 bar) 0.5psi (0.03 bar) 0.5psi (0.03 bar)

Operating Temperature Range -40˚C - 82˚C (-40˚F - 180˚F) -40˚C - 82˚C (-40˚F - 180˚F) -40˚C - 82˚C (-40˚F - 180˚F)

Life 100,000 cycles at 0.5psi 100,000 cycles at 0.5psi 6000 cycles at 0.5psi max

max pressure each cycle and max pressure each cycle and pressure each cycle and at
at max electrical load at max electrical load max. electrical load

Electrical Rating 300 va pilot duty at 115 - 300 va pilot duty at 115 - 300 va pilot duty at 115 -
277 VAC, 10 amp, non- 277 VAC, 10 amp, non- 277 VAC, 10 amp, non­ inductive, 277 VAC, 60Hz inductive, 277 VAC, 60Hz inductive, 277 VAC, 60Hz

Contact Arrangement SPDT SPDT SPST-NC

Electrical Connections Screw top terminals with Screw top terminals with Screw top terminals with

cup washers cup washers cup washers

Sample Line Connections Ferrule and nut compression Ferrule and nut compression Ferrule and nut compression
type connectors that accept type connectors that accept type connectors that accept

6.35mm (0.25") OD rigid tubing or 6.35mm (0.25") OD rigid tubing or 6.35mm (0.25") OD rigid tubing
1/4” OD barbed connections (-112) 1/4” OD barbed connections (-112)

that accept exible tubing. that accept exible tubing.

Automatic/Manual Reset Automatic Automatic Manual

Approvals UL (File# MH6213) and CSA (File# 018754_0_000)

Dimensions in millimeters and (inches) Alarm or Control

35 (1.375)

18 (0.710)

83 (3.25)

To prove excessive airow or pressure

To prove insucient airow or pressure

1/4” OD Barbed Connector
suitable for exible tubing.

5 (0.188)

41 (1.625)

49 (1.938)

83 (3.25)

98 (3.875)

11 (0.438)

71 (2.813)

156 (6.125)

20 (0.781)

NRTL/C

Greystone Energy Systems Inc. is one of North America’s

largest ISO registered manufacturers of HVAC/R sensors and

transmitters for Building Automation Management Systems.

We have conscientiously established a worldwide
reputation as an industry leader by maintaining leading­edge design technology, prompt technical support, and a

commitment to on-time deliveries. We take pride in our

Quality Management System which is ISO 9001 certied,

assuring our customers of consistent product reliability.

PRINTED IN CANADA