Schneider Electric AFS Series Catalog Page
PRESSURE
PSI
Adjustable Setpoint-Air Differential Pressure Switches
AFS Series
Description
The Cleveland Controls AFS Series Adjustable Differential Pressure Switches are general-purpose, airflow-proving switches designed for HVAC and building automation applications. The AFS Series can be used to sense positive, negative, or differential air pressure. The diaphragm and calibration spring are housed in a plated enclosure with a removable metal guard protecting the set point screw and snap action switch terminals. Electrical connections are made through a 7/8 diameter opening in the metal guard that accepts a conduit connection. Air sampling connections accept OD rigid or semi rigid tubing. For low current applications use Model AFS-405 with gold contacts.
Features
•Adjustable set point
•For static or differential pressure
•15A switch rating
•Gold contacts (Model AFS-405)
•UR, CSA, FM approved
•Two-year warranty
AFS Series
Application
•Proving fan status
•Monitoring filter for excess pressure drop
•Monitoring duct static pressure
•Proving air flow
•Monitoring damper status
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Specifications |
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Relay Type |
SPDT |
Wetted Parts |
Silicone |
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Relay Rating |
2.4 A @ 24 VAC; 15 A @ 277 VAC |
Media Compatibility |
Inert dry air |
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Setpoint (SP) |
Adjustable, 0.05 to 12.0" WC |
Process Connection |
1/8" FNPT, 1/4" compression, |
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Differential Progressive |
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1/4" barb (see ordering) |
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0.02" to 0.8" WC per setpoint |
Wiring Terminations |
3 Terminals |
17 |
Reset Auto reset |
All models |
Mounting Vertical |
2 tabs w/Holes 0.19" (0.48 cm) |
Sensor Type |
Silicone Diaphragm |
Enclosure Rating |
Zink-plated steel, NEMA 1 |
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Operating Pressure |
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Dimensions |
4" w x 6.13"h x 3.56"d, |
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Range |
0.05 to 12" WC (See ordering) |
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(10.2 x 15.6 x 9 cm) |
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Overpressure |
(Burst) 13.85"WC (3.45 kPa) |
Weight |
1.2 lb (0.5 Kg) |
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Max Operating |
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Approvals |
UL File #MH6213, CSA, FM |
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Pressure |
(Proof) 13.85"WC (3.45 kPa) |
Warranty |
2 years |
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Operating Temperature -40° to 180°F (-40° to 82°C) |
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Operating Humidity |
10 to 90% Non-condensing |
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1040 |
September 2016 |
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PRESSURE 
Adjustable Setpoint-Air Differential Pressure Switches
AFS Series
PSI
DIMENSIONS |
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in |
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6.13 |
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2.81 |
(15.57) |
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(cm) |
(7.14) |
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Low pressure inlet (B) |
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3.25 |
3.88 |
3.25 |
C NO NC |
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(9.86) |
(8.23) |
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(8.23) |
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1.38 |
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0.710 |
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1.63 |
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(3.50) |
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(1.80) |
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1.94 |
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(4.14) |
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(4.93) |
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0.44 |
High pressure inlet (A) |
0.78 |
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Two mounting holes |
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(1.12) |
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(1.98) |
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3/16 fastener required |
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OPERATION
Select a mounting location that is free from vibration. The switch |
Refer to the Dimensions drawing to identify the high pres- |
must be mounted with the diaphragm in any vertical plane in |
sure inlet (A) and the low pressure inlet (B), and connect the |
order to obtain the lowest specified operating setpoint. Avoid |
sample lines as follows: |
mounting with the sample line connections in the up position. |
Positive Pressure Only |
Surface mount via the two 3/16" diameter holes in the integral |
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mounting bracket. |
Connect the sample line to (A); |
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(B) remains open to the atmosphere. |
Locate sampling probe a minimum of 1-1/2 duct diameters |
Negative Pressure Only |
downstream from the air source. Install the sampling probe as |
Connect the sample line to (B); |
close to the center of the airstream as possible. |
(A) remains open to the atmosphere. |
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Two Negative Samples |
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Connect the higher negative sample to (B); |
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Connect the lower negative sample to (A). |
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Two Positive Samples |
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Connect the higher positive sample to (A); |
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Connect the lower positive sample to (B). |
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One Positive and One Negative Sample |
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Connect the positive sample to (A); |
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Connect the negative sample to (B). |
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ORDERING INFORMATION |
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MODEL |
DESCRIPTION |
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AFS-145* |
Differential pressure switch 0.05" to 12" W.C. (12.5 to 2989 Pa), 1/8" NPTF, SPDT |
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AFS-222* |
Differential pressure switch 0.05" to 12" W.C. (12.5 to 2989 Pa), 1/4" compression fittings, SPDT |
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AFS-222-112 |
Differential pressure switch 0.05" to 12" W.C. (12.5 to 2989 Pa), 1/4" barbed fittings, SPDT |
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AFS-262* |
Differential pressure switch 0.05" to 2" W.C. (12.5 to 498 Pa), 1/4" compression fittings, SPDT |
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AFS-262-112 |
Differential pressure switch 0.05" to 2" W.C. (12.5 to 498 Pa), 1/4" barbed fittings, SPDT |
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AFS-405 |
Differential pressure switch 0.05" to 12" W.C. (12.5 to 2989 Pa), gold contacts, SPDT |
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* C models Kele calibration available |
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21122 |
RELATED PRODUCTS |
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4" aluminum impact tube, 1/4" OD connection |
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21122-112 |
6" aluminum impact tube for 1/8" thru 1/4" ID flexible plastic tubing |
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60681 |
Static or total pressure sensing kit |
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A-301-K |
Duct static pressure tip, 1/4" compression |
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A-302-K |
Duct static pressure tip, 1/4" barb |
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A-308-K |
Duct static pressure fitting, 1/4" barb |
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A-345-K |
Flange mounting kit (1 required for each A-301-K or A-302-K) |
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T-101 |
1/4" OD black poly tubing, 1 coil, 250 ft (76 m) |
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PVG-1 |
Compact pressure or vacuum generator |
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<![endif]>PRESSURE
17
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1041 |
September 2016 |
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