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Thermal Management for Enclosures
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Friday, December 02, 2016
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Basic Blowers Accessories and Options

AIRFLOW SWITCH: Protects equipment against damage caused by loss of cooling airflow, by activating an alarm or turning off power. The switch can be mounted on any suitable surface which allows the stainless steel air vane to be placed in the critical airstream. This switch is a single-pole double throw type, with normally open and normally closed contacts.

The UL rating for the rotary snap action switch is 5 amps at 250 volts AC. A three foot [0.9m], three wire SJT power cord is provided, allowing connection to normally open or normally closed circuits.

The choice of air vanes is determined by location and orientation in the airstream, and the normal operating air velocity at the point of installation. Refer to the chart below or consult Kooltronic Engineering for assistance.

For other switch orientations or if air velocity cannot be measured by conventional means, Kooltronic can supply additional individual or sets of air vanes to determine the optimum size.

DRAWINGS AND DIMENSIONS (click and drag to pan)
Dimensions, inches [mm], are for reference only and subject to change.
 
TECHNICAL DATA
Orientation of Airflow Switch
Vertical Airstream
Horizontal Airstream
Airstream Up
Airstream Down
Arm Horizontal
Arm Vertical
Vane Down
 
Increasing
Air
Decreasing
Air
Increasing
Air
Decreasing
Air
Increasing
Air
Decreasing
Air
Increasing
Air
Decreasing
Air
Model
Dim.
"L"
Max.
Vane
Length
Actuate
ft/min
Deactuate
ft/min
Actuate
ft/min
Deactuate
ft/min
Actuate
ft/min
Deactuate
ft/min
Actuate
ft/min
Deactuate
ft/min
KV-1
3.36 [85.3]
2.86 [72.6]
660
590
-
-
620
530
630
520
KV-2
2.75 [69.9]
2.25 [57.2]
840
750
-
-
790
670
800
660
KV-3
2.44 [62.0]
1.94 [49.3]
980
870
-
-
860
750
860
770
KV-4
2.19 [55.6]
1.69 [42.9]
1010
960
640
610
980
870
980
820
KV-5
1.94 [49.3]
1.44 [36.6]
1180
1130
880
720
1070
930
1050
960
KV-6
1.56 [39.6]
1.06 [26.9]
1520
1370
1210
1050
1370
1260
1410
1290
KV-7
1.44 [36.6]
0.94 [23.9]
1670
1520
1380
1290
1570
1430
1600
1430
KV-8
1.25 [31.8]
0.75 [19.1]
2020
1880
1940
1780
2010
1710
2080
1780
KV-9
1.13 [28.7]
0.63 [16.0]
2360
2180
2350
1930
2340
2060
2510
2150

Airflow switches KV-1 through KV-3 should not be mounted in a "down airstream" orientation because the weight of the vane is greater than the return spring force. Dimensions, inches[ mm], are for reference only and subject to change.

 

 

Airflow Switch Data Sheet


View Data Sheet

 

AUTOMATIC SPEED CONTROL: The Kooltronic Fan and Blower Automatic Speed Control (Part Number KSC100) is a solid state "smart" controller packaged in a NEMA 1 type enclosure for remote mounting. The allowable input power supply range is 95 to 250 Volts, 47 to 63 Hz. It is furnished standard with an IEC 320 connector, a power supply fuse and a temperature sensor. Additional temperature sensors are optional.

The controller will operate single or multiple fans or blowers of compatible voltage and frequency up to a combined load of 6 Amps. The controller may be operated by either a control voltage signal of 0 to 10 VDC, a control current signal of 0 to 20 mA or one to three temperature sensors. With multiple temperature sensors the controller will respond to the highest sensed temperature.

The control circuit board is furnished with a terminal strip for field connecting the sensor and fan wires. A pressure type strain relief connector is furnished in the enclosure. If required by the installation or by code, this connector can be replaced with a 1/2-inch [12.7mm] trade size conduit connector.

A wide variety of control logic options can be field programmed into the controller by means of a board mounted DIP switch. These include fan idle or starting speed at 30%, 40%, 50% or 60% of supply voltage, fan on or off below the idle setting, control temperature setting of 86ºF (30ºC), 95ºF (35ºC), 104ºF (40ºC), 113ºF (45ºC), and temperature differential settings of 7ºF (4ºC) and 18ºF (10ºC). The selectable fan on/off feature is operative when the temperature(s) drop below the control temperature setting.

Consult factory for use with compatible Kooltronic fans or blowers.

KSC100 Photo

 

 
DRAWINGS AND DIMENSIONS (click and drag to pan)
Dimensions, inches [mm], are for reference only and subject to change.
 
     
 
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