AFS 222 Ds

TM
AIR SENSING SWITCHES

MODELS AFS-222, AFS-262, AFS-460
DESCRIPTION
Models AFS-222, AFS-262, and AFS-460 Differential
Pressure Switches are general-purpose, airflow-proving switches designed for HVAC and building automation
applications. They may be used to sense positive, negative, or differential air pressure. The AFS-460 models
have a manual reset push button; the N.C. switch will
open upon pressure rise to setpoint but will not close
until the reset button is pushed.
AFS-222
The plated housing contains a diaphragm, calibration

spring, and snap-acting SPDT switch. The sample connections located on each side of the diaphragm accept
1/4" OD tubing via the integral compression ferrule and
nut. An enclosure cover guards against accidental contact with the live switch terminal screws and the setpoint
adjusting screw. The enclosure will accept a 1/2" conduit
connection.
AFS-460
FM
APPROVED
FEATURES
APPLICATIONS
Two-year warranty
Adjustable setpoint
For static or differential pressure
UL, CSA, FM approved
Manual reset (Model AFS-460)
Proving fan status

Monitoring filter for excess pressure drop
Monitoring duct static pressure
Proving air flow
Monitoring damper status
SPECIFICATIONS
Setpoint range
AFS-222
AFS-262
AFS-460
AFS-460-DSS
0.05" to 12.0" W.C.

(12.5 to 2989 Pa)
0.05" to 2.0" W.C.
(12.5 to 498 Pa)
0.04" to 12.0" W.C.
(10.0 to 2989 Pa)
2.0" to 12.0" W.C.
(498 to 2989 Pa)
Switch differential,
AFS-222, 202 only Progressive, increasing from
approximately 0.02" W.C.
(5.0 Pa) @ min setpoint to
approximately 0.8" W.C.
(199 Pa) @ max setpoint
Contacts
AFS-222, -202
AFS-460
AFS-460-DSS
SPDT
SPST N.C.
2-SPST N.C.
Electrical rating
AFS-222, -202
AFS-460
Overpressure
0.5 psig (3.5 kPa)
Operating temp
-40 to 180F (-40 to 82C)
Pressure
connections
Ferrule and nut compression type

connectors will accept 1/4" OD
tubing
Connections
Agency approvals
Screw-top terminals with cup

washers
UL listed, FM, CSA, CE
Weight
2.0 lb (0.91 kg)
Life
AFS-222, -202
AFS-460
KELE www.kele.com FAX 901-372-2531
300 VA pilot duty @ 115-277 VAC

15A noninductive, 277 VAC, 60 Hz
24 VAC @ 2.4A
15A @ 125-277 VAC
1/4 HP @ 125 VAC
1/2 HP @ 250 VAC
1/2A @ 125 VDC
100,000 cycles min @ 0.5 psig

(3.5 kPa) max pressure each cycle
and at max electrical load
6000 cycles
USA 901-937-4900 International 901-382-6084

September 2007
DIMENSIONS
in
(cm)
2.81
(7.14)
6.13
(15.57)
Low Pressure Inlet (B)
3.25
(8.23)
3.88
(9.86)
3.25
(8.23)
C NO NC
0.710
(1.80)
1.38
(3.50)
1.63
(4.14)
1.94
(4.93)
High Pressure Inlet (A)
0.44
(1.12)
Two Mounting Holes

3/16 required
0.78
(1.98)
OPERATION
Select a mounting location that is free from vibration. The switch
must be mounted with the diaphragm in any vertical plane in order to
obtain the lowest specified operating setpoint. Avoid mounting with
the sample line connections in the up position. Surface mount via
the two 3/16" diameter holes in the integral mounting bracket.
The Model AFS-460-DSS has a lead switch (A) and a lag switch (B).
The lead switch trips according to the setpoint knob and the lag
switch trips after the lead switch. If dual-switch simultaneous operation is required, order (not stocked at Kele) AFS-460-136 (120 VAC
power) or AFS-460-137 (24 VAC power).
Locate sampling probe a minimum of 1-1/2 duct diameters downstream from the air source. Install the sampling probe as close to the
center of the airstream as possible.
Refer to the Dimensions drawing to identify the high pressure inlet

(A) and the low pressure inlet (B), and connect the sample lines as
follows:
Positive Pressure Only
Connect the sample line to (A);
(B) remains open to the atmosphere.
Negative Pressure Only
Connect the sample line to (B);
(A) remains open to the atmosphere.
Two Negative Samples
Connect the higher negative sample to (B);
Connect the lower negative sample to (A).
Two Positive Samples
Connect the higher positive sample to (A);
Connect the lower positive sample to (B).
One Positive and One Negative Sample
Connect the positive sample to (A);
Connect the negative sample to (B).
WIRING
NO
Opens on a
rise in
differential
pressure
NC
NC
Action on a rise in differential pressure
Opens on a rise in differential pressure
AFS-222, -262
AFS-460
A
Lead
NC
B
Lag
NC
AFS-460-DSS
ORDERING INFORMATION
MODEL
AFS-222
AFS-222-C
AFS-262
AFS-262-C
AFS-460
AFS-460-C
AFS-460-DSS
AFS-400-DSS-C
DESCRIPTION
0.05" to 12" W.C. (12.5 to 2989 Pa)
Kele calibrated for your application (specify setpoint)
0.05" to 2" W.C. (12.5 to 498 Pa)
Manual reset differential pressure switch
Manual reset differential pressure switch with two SPST switches
RELATED PRODUCTS
#21121
Duct impact tube
A-301, A-302
Static pressure tip
KELE www.kele.com FAX 901-372-2531
USA 901-937-4900 International 901-382-6084

AFS 222 Ds

Uploaded by

Copyright:

Available Formats

AFS 222 Ds

Uploaded by

Document Information

Original Description:

Original Title

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

AFS 222 Ds

Uploaded by

Copyright:

Available Formats

TM

AIR SENSING SWITCHES

The plated housing contains a diaphragm, calibration

Proving fan status

0.05" to 12.0" W.C.

0.5 psig (3.5 kPa)

-40 to 180F (-40 to 82C)

Ferrule and nut compression type

Screw-top terminals with cup

2.0 lb (0.91 kg)

KELE www.kele.com FAX 901-372-2531

300 VA pilot duty @ 115-277 VAC

100,000 cycles min @ 0.5 psig

USA 901-937-4900 International 901-382-6084

Two Mounting Holes

Refer to the Dimensions drawing to identify the high pressure inlet

Action on a rise in differential pressure

Opens on a rise in differential pressure

KELE www.kele.com FAX 901-372-2531

USA 901-937-4900 International 901-382-6084

You might also like