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Series DFS Low Limit Freeze Protection Switch
Brand: Dwyer Instruments, LLCThe Series DFS Low Limit Freeze Protection Switch protects cooling coils in air handler systems by preventing frost build up on the coils.
By sensing the lowest temperature along any 1' section of capillary, the DPDT manual or automatic reset relays signal the building management system, as well as cut off the fan.
Set points can be adjusted as low as 1° C (34° F) utilizing the visual set point indicator and set point screw.
The Series DFS includes mounting clips for easy installation.
Features- DPDT Switch Feedback
- Setpoint as low as 1° C (34 ° F)
- Mounting Clips Included
1 - 4 of 4 Part Numbers
DFS-DA10
- Reset Options - Automatic Reset
- Capillary Length - 10 Foot Capillary
DFS-DA20
- Reset Options - Automatic Reset
- Capillary Length - 20 Foot Capillary
DFS-DM10
- Reset Options - Manual Reset
- Capillary Length - 10 Foot Capillary
DFS-DM20
- Reset Options - Manual Reset
- Capillary Length - 20 Foot Capillary
1 - 4 of 4 Part Numbers
Specifications
Brand
Adjustment Type
- Field Adjustable
Approvals & Certifications
- cUL
- UL
Capillary Length
- 10 feet (3 metres)
- 20 feet
Capillary Material
- Copper
Deadband, Approximate
- 2.5° C (4.5° F)
Electrical Connectors
- 1/2” NPT
Electrical Rating
- 14 FLA, 84 LRA, 3/4 hp at 120 Vac, 12 FLA, 72 LRA, 2 hp at 240 Vac
- 720 VA, Max.
Enclosure, Body Material
- Plated Steel
Maximum Sensor / Probe Temperature
- 149° C (300° F)
Operating Temperature
- -51° to 71° C (-60° to 160° F)
Operating Temperature - Sensor
- 149° C (300° F)
Set Point - Decreasing
- 1° to 21° C
- 1° to 21° C (34° to 70° F)
Set Point - Increasing
- 1° to 21° C
- 1° to 21° C (34° to 70° F)
Switch Type
- DPDT
Wetted Materials
- Tin-Plated Copper
- Cooling Coil Frost Monitoring
- HVac Systems