Dwyer DFS2-DA20 Low-Limit Freeze-Protection Switch. Cuts Off Fan and Alerts Building Management System When Cooling-Coil Freeze-Up is Detected. Automatic Reset. 20 ft Capillary.

• UPC   711841873660
• EFFECTIVE PROTECTION: Protect cooling coils from damaging freeze-up with the Dwyer DFS2 Series Low-Limit Freeze Protection Switch. When freezing temperature is sensed along any 1-ft section of the vapor-filled capillary tube, the thermostat’s DPDT relay shuts off the fan and alerts the building management system. Models with auto- and manual-reset functions are available. SAVE TIME AND MONEY: The Dwyer DFS2 Series Low-Limit Freeze Protection Switch prevents costly equipment damage, expensive repairs and downtime by shutting down HVAC systems, heat exchangers and cooling coils before freeze-ups happen. EASY INSTALLATION: Surface-mount the thermostat with screws. Copper vapor-filled capillary tube uncoils to 10 or 20 ft length for installation in a serpentine pattern across coil face using mounting clips (sold separately https://www.amazon.com/dp/B07YNBVWQL). The joint spring protector helps prevent kinking. Setpoint is factory-set to 39°F (4°C) and adjusts easily using the visual indicator and adjustment screw accessible via the screwdriver slot. IN THE BOX: One (1) Dwyer DFS2-DA20 Low-Limit Freeze-Protection Switch with 20-ft cap tube and auto reset feature. Instructions., Manufacturer: Dwyer