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Low Temperature Cutout Thermostat
NSA-FREEZE

Part Numbers

NSA-FLS-06-A
NSA-FLS-06-M
NSA-FLS-10-A
NSA-FLS-10-M
NSA-FLS-20-A
NSA-FLS-20-M
NSA-FLS-50-A
NSA-FLS-50-M

The NSA-FLS Series Low Temperature Cutout Thermostat, otherwise known as a "Freeze Stats" are designed with a vapor charged capillary sensing element for use in equipment that requires low-temperature cutout protection. These stats protect heating and cooling coils from freezing or are used in other equipment where temperature stratification may occur. All NSA-FLS series devices are 4 Wire, two circuit devices that can be used to shut down your system upon the air temperature reaching the low temperature limit as well as simultaneously switch on a local indicator or remote alarm when used with your building management system or controller.

Applications

Protect Heating and Cooling Coils, Low Temperature Limit Switch in applications where temperature stratification may occur

Thermostat Type: Self-contained, electromechanical
Sensing Element: Vapor Pressure
Sensing Media: Temperature in air
Adjustable Trip Point Range: 15°F to 55°F (-9°C to 13°C); Factory set with Stop at 35°F(1.7°C)
Trip Point Screw Location: Slotted adjustment screw top of unit
Reset Options: Manual and Automatic Resets available (See Ordering Grid back of data sheet)
Switching Differential (Auto Reset Only): Approximately 5°F (2.8°C), Non-adjustable
Contact Style: 4 Wires, 2 Circuits (Two simultaneously switching contacts (Circuits))
Contact Action: Line to M2 (Main): Open on Temperature Drop
Line to M1 (Auxiliary/Alarm): Close on Temperature Drop
Contact Ratings: See Electrical Ratings
Wire Connections: Screw Terminals; Copper wire only rated to 90ºC (194ºF) minimum
Sensing Response: Lowest temp sensed along any 14 to 16" (35.6 to 40.6 cm) length of sensing element
Sensing Capillary Material: Copper
Sensing Capillary Length (feet): NSA-FLS06-x: 6 | NSA-FLS-10-x: 10 | NSA-FLS-20-x: 20 | NSA-FLS-50-x: 50
Sensing Capillary Diameter: 0.125" (3.18 mm)
Enclosure NEMA Rating: NEMA 1 (IP10)
Enclosure Material: Steel, galvanized
Enclosure Color | Finish: Black | Baked Enamel
Conduit Entry: ½" conduit knockout
Operating Temperature Range: 0 to 140°F (-18 to 60°C)
Storage Temperature Range: -40 to 158°F (-40 to 70°C)
Sensing Capillary Overrun Temperature: 400°F (204.4°C) maximum
Operating / Storage Humidity Range: 0 to 95% RH, non-condensing
Product Weight: NSA-FLS-20-x: 2.31 lbs. (1.046 kg)
Product Dimensions (L x W x H): NSA-FLS06-x, NSA-FLS-10-x, NSA-FLS-20-x: 8.125" (20.64 cm) x 6.375" (16.19 cm) x 2.625" (6.67 cm)
NSA-FLS-50-x: 10.125" (25.72 cm) x 3.375" (16.19 cm) x 5.500" (13.97 cm)
Agency Approvals: UL File # SA516 UL 873 | CSA File # LR948 C22.2 No. 24-199 | C-Tick # ACN 002 968 103 | RoHS Compliant
Pole Number Line-M2 (main) Line-M1(auxiliary)
Motor Ratings 120V 208V 240V 277V 120V 208V 240V 277V
AC Full Load Amp 16.0 9.2 8.0 - 6.0 3.3 3.0 -
AC Locked Rotor Amp 96.0 55.2 48.0 - 36.0 19.8 18.0 -
AC Non-Inductive Amp 16.0 9.2 8.0 7.2 6.0 6.0 6.0 6.0
Pilot Duty - Both Poles 125 VA, 120 to 600VAC and 57.5 VA, 120 to 300 VDC 125VA, 120 to 600 VAC and 57.5 VA
Thermostat Type: Self-contained, electromechanical
Sensing Element: Vapor Pressure
Sensing Media: Temperature in air
Adjustable Trip Point Range: 15°F to 55°F (-9°C to 13°C); Factory set with Stop at 35°F(1.7°C)
Trip Point Screw Location: Slotted adjustment screw top of unit
Reset Options: Manual and Automatic Resets available (See Ordering Grid back of data sheet)
Switching Differential (Auto Reset Only): Approximately 5°F (2.8°C), Non-adjustable
Contact Style: 4 Wires, 2 Circuits (Two simultaneously switching contacts (Circuits))
Contact Action: Line to M2 (Main): Open on Temperature Drop
Line to M1 (Auxiliary/Alarm): Close on Temperature Drop
Contact Ratings: See Electrical Ratings
Wire Connections: Screw Terminals; Copper wire only rated to 90ºC (194ºF) minimum
Sensing Response: Lowest temp sensed along any 14 to 16" (35.6 to 40.6 cm) length of sensing element
Sensing Capillary Material: Copper
Sensing Capillary Length (feet): NSA-FLS06-x: 6 | NSA-FLS-10-x: 10 | NSA-FLS-20-x: 20 | NSA-FLS-50-x: 50
Sensing Capillary Diameter: 0.125" (3.18 mm)
Enclosure NEMA Rating: NEMA 1 (IP10)
Enclosure Material: Steel, galvanized
Enclosure Color | Finish: Black | Baked Enamel
Conduit Entry: ½" conduit knockout
Operating Temperature Range: 0 to 140°F (-18 to 60°C)
Storage Temperature Range: -40 to 158°F (-40 to 70°C)
Sensing Capillary Overrun Temperature: 400°F (204.4°C) maximum
Operating / Storage Humidity Range: 0 to 95% RH, non-condensing
Product Weight: NSA-FLS-20-x: 2.31 lbs. (1.046 kg)
Product Dimensions (L x W x H): NSA-FLS06-x, NSA-FLS-10-x, NSA-FLS-20-x: 8.125" (20.64 cm) x 6.375" (16.19 cm) x 2.625" (6.67 cm)
NSA-FLS-50-x: 10.125" (25.72 cm) x 3.375" (16.19 cm) x 5.500" (13.97 cm)
Agency Approvals: UL File # SA516 UL 873 | CSA File # LR948 C22.2 No. 24-199 | C-Tick # ACN 002 968 103 | RoHS Compliant
Pole Number Line-M2 (main) Line-M1(auxiliary)
Motor Ratings 120V 208V 240V 277V 120V 208V 240V 277V
AC Full Load Amp 16.0 9.2 8.0 - 6.0 3.3 3.0 -
AC Locked Rotor Amp 96.0 55.2 48.0 - 36.0 19.8 18.0 -
AC Non-Inductive Amp 16.0 9.2 8.0 7.2 6.0 6.0 6.0 6.0
Pilot Duty - Both Poles 125 VA, 120 to 600VAC and 57.5 VA, 120 to 300 VDC 125VA, 120 to 600 VAC and 57.5 VA

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