Snow Melting Systems Control: GF Pro

Snow and ice Melting Systems Control: Automatic with Integral Ground Fault Equipment Protection

Features & Benefits

  • Automatic snow and ice melting control minimizes operating costs
  • Rated for up to 30 amp resistive loads
  • Integral 30mA of Ground Fault Equipment Protection (GFEP)
  • Weather-resistant NEMA 4X enclosure
  • C-UL-US Listed for Temperature Regulating Equipment
  • Adjustable Hold-On timer continues heater operation after snow and ice stop to ensure complete melting
  • Dual sensor capability to meet site performance requirements
  • Automatic and manual-override operator controls for changing environmental conditions
  • Optional remote control operation for added convenience
Snow Switch Model GF Pro Snow and Ice Control

Snow Switch Model GF Pro Snow and Ice Control

GF Pro Control Panel


GF Pro Controller Mounting Dimensions

GF Pro Controller Mounting Dimensions


Snow and ice melting systems control: Automatic, GFEP

The Snow Switch® Model GF Pro utilizes standard Environmental Technology snow and ice sensors (sold separately), applications include snow and ice detection and melting for pavement, sidewalks, loading docks, roofs, gutters and downspouts in commercial and residential environments.

The GF Pro interfaces with up to two standard Environmental Technology sensors to meet site requirements. The CIT–1 sensor may be roof or mast mounted and can be paired with the GIT–1 sensor for gutter applications or the SIT–6E sensor for pavement applications. All three sensors detect precipitation as snow at temperatures below 38°F (3.3°C), saving energy and ensuring thorough snow and ice melting. Since 1968, these sensors have been the industry’s most versatile and cost-effective automatic snow melting control sensors.

The GF Pro features built-in 30mA, self-testing Ground Fault Equipment Protection (GFEP), digitally filtered to minimize false tripping. A ground fault condition must be manually reset using the Test/Reset switch before heater operation can continue.

The GF Pro uses both automatic and manual-override operator controls. The adjustable Hold-On timer continues heater operations up to 8 hours after snow or ice conditions end to ensure complete melting. The Heater Cycle control button allows manual initiation or cancellation of a heating cycle. The optional RCU–4 remote control unit can be located for convenient monitoring and control. These flexible control options provide complete snow melting and water evaporation at a low operating cost.

The GF Pro weighs only 3 pounds and measures 5 1/2” (L) x 8 1/8” (W) x 4 3/8” (H). Comprehensive instruction manuals simplify installation and operation. These products are also supported by Environmental Technology Technical Support.

The GF Pro is a capable snow and ice control for medium-sized applications whose features and power requirements do not require an APS or EUR Series control panel.


Area of useNonhazardous locations
ApprovalsC-UL-US Listed, Type 873 Temperature Regulating Equipment & Type 1053 Ground-Fault Sensing and Relaying Equipment
ProtectionIP 66, NEMA 4X
Cover attachmentPolycarbonate with machine screws
Entries2 x 3/4" entry (bottom right) for NEC Class 2 connections
3 x 1-1/16" entries (bottom left) for supply and load power
MountingWall mount
Dimensions5 1/2" (L) x 8 1/8" (W) x 4 3/8" (H) / 140mm (L) x 207mm (W) x 112mm (H)
Supply voltage100 - 277 VAC; 50/60 Hz
Load30 amp maximum resistive
Contact type2 Form A
Weight3 Pounds (not including sensors)
Maximum ratingsVoltage: 100 - 277 VAC
Current: 30 amps
Heater Hold-On timer0 to 8 hours; actuated by snow stopping or toggle switch
System testSwitch toggles heater contact on and off. If temperature exceeds optional high limit thermistor (45°F), heater shuts off to reduce costs and prevent damage.
Front Panel Interface
Status indicatorSUPPLY (green): Power on
HEAT (yellow): Heating cycle in progress
SNOW (yellow): Sensor(s) detect snow
GFEP (red): Ground Fault condition
GFEP (red, flashing): Failed
GFEP (red, rapid flashing): GFEP test in progress
Snow/Ice Sensors
Maximum quantity2 ETI sensors
Circuit typeNEC Class 2
Lead lengthUp to 500' (152m) using 18 AWG 3-wire jacketed cable
Up to 2,000' (609m) using 12 AWG 3-wire jacketed cable
Wire and Cable Ratings
Power cableSize for heater load (30 amps maximum)
Sensor wiring#18 AWG jacketed, 3-conductor
Heater cableSize for maximum heater load
Remote wiring#22 AWG jacketed, 2-conductor
Ground Fault Equipment Protection (GFEP)
Set point30mA
Automatic self-testGFEP verified before contactors operate; GFEP runs on start-up and every 24 hours
Manual Test/ResetTest/Reset switch on front panel
Operating temperature-31°F to 113°F (-35°C to 45°C)
Storage temperature-67°F to 167°F (-55°C to 75°C)