Series DFS2 Low Limit Freeze Protection Switch

Manual and Automatic Reset

The Series DFS2 Low Limit Freeze Protection Switch protects cooling coils in air handler systems by preventing frost build up. The thermostat and its capillary sensing element provide an antifreeze function by sensing the lowest temperature along any one foot section of capillary. The DPDT manual or automatic reset relays signal the building management system as well as cut off the fan. The Series DFS2 will detect temperature drops below the fixed safety value (set point) which can be set as low as 34°F (1°C) utilizing the visual set point indicator and set point screw.

Product Applications

  • HVAC equipment
  • Heat exchangers and cooling coils

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Model Description Usually Ships* Price Order
DFS2-DA10
Ships: Next Day
Price: $140.00
Low limit temperature control, 10 ft capillary with automatic reset Next Day* $140.00 Order
DFS2-DA20
Ships: Next Day
Price: $185.00
Low limit temperature control, 20 ft capillary with automatic reset Next Day* $185.00 Order
DFS2-DM10
Ships: Next Day
Price: $145.00
Low limit temperature control, 10 ft capillary with manual reset Next Day* $145.00 Order
DFS2-DM20
Ships: Next Day
Price: $190.00
Low limit temperature control, 20 ft capillary with manual reset Next Day* $190.00 Order

Specifications

Sensing Element:
Vapor-filled capillary.
Operating Temperature:
14°F to 54°F (-10°C to 12°C).
Storage Temperature:
14°F to 158°F (-10°C to 70°C).
Capillary Overload Temperature:
392°F (200°C), maximum 60 minutes.
Humidity Limit:
0 to 95% RH, non-condensing.
Enclosure:
Galvanized steel base, ABS cover.
Enclosure Rating:
NEMA 1 (IP40).
Capillary Material:
Copper.
Cable Entry:
(1) M20 compression fitting.
Reset Action:
Available in automatic or manual reset options.
Low-level Setpoint:
Factory Set: 39°F (4°C), and safety lock secured; Adjustment via screwdriver slot.
Wire Connection:
Terminal with wire-retaining screws.
Wire Size:
Max. 14 AWG.
Electrical Rating:
24 to 250 VAC, 15 (8) A.
Electrical Connections:
Two each NO/NC/Common.
Deadband:
1.8°F (fixed).
Weight:
1.6 lb (0.7 kg).
Agency Approvals:
CE.

Features

  • Vapor-filled copper capillary sensing element
  • Joint spring protector at capillary-bellow connection
  • Set point safety-lock protection and simple adjustment
  • Easy installation and wiring
  • Automatic and manual reset

Accessories

Model Number Description Usually Ships* Price Order
A-DFS2-C Capillary mounting clips Next Day $12.00 Order

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