Freezestat Auto Reset

APPLICATIONS

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. The Freeze Stats or low limit switches are available in four standard lengths with either Automatic or Manual Resets based upon the system design requirements. A NEMA 1 rated metal enclosure comes standard with a ½” conduit knockout included for all line voltage connections.

FEATURES & BENEFITS

• 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 on page 2
• 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): 20
• 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