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Automatic Snow/Ice Melting Controller — Installation & Operation Instructions sa-1 3
Roof
2" (50.80mm) min.
SA-1
1" (25.40mm)
Electrical Junction Box
.5" (12.70mm) Tubing
Gutter
Figure 4a
OPERATION INSTRUCTIONS
The SA-1 snow melting control is designed to energise
the heating cable only when snow or ice conditions exist
and there is risk of freezing. If the temperature is below 3°C
(38°F) and snow is falling, the controller will apply power to
heating cable. The cable remains energised until 2.75 hours
after the snow stops. The delay is necessary to ensure the
heated area dries. If at any time the snow starts falling
again the controller restarts the heating cycle.
In spring or fall when the snow conditions are not very
heavy, the controller may switch on the heated area. For
this situation we recommend having a manual switch
connected in series with the SA-1 to turn it off.
In wintertime the wind may cover the heated area with
snow. The SA-1 can not sense this situations and will not
energise the heating cable. Putting snow on the sensor
surface can energise the SA-1.
The SA-1 may be tested for functionality if the outside
temperature is below 25°C (77°F), Submerge the
temperature sensor into a glass with ice water for 5 to
10 minutes, wet the surface of the moisture sensor, the
SA-1 should energise the heating cable. After this test,
dry off the sensor, disconnect the power for one minute
and then reconnect it back. The cables should remain
deenergised.
Every year, in the fall the SA-1 must be inspected for
physical damage and to clean up the snow sensor surface.
To clean the snow sensor surface:
1. Disconnect SA-1 from the power supply.
2. With a clean, soft bristle tooth brush clean up the surface
of the snow sensor.
3. Reconnect SA-1 to the power supply.
ELECTRICAL SPECIFICATIONS
Functional
Operating temperature +3°C (38°F +/-1°F)
Power switch OFF temperature +45°C (112°F)
Power switch ON temperature +30°C (86°F)
Environmental
Working temperature -40°C (-40°F) to 65°C (150°F)
Storage temperature -45°C (-49°F) to 70°C (160°F)
Humidity environment 0 to 100 %
Supply requirements
Power supply voltage 120VAC
Frequency 50/60 Hz
Maximum power consumption 60W
Output characteristics
Output type relay (dry contact)
Contact output N.O. max. 16 Amps @ 120VAC
Mounting connector .5" (12.70mm) NPT
Power wire length 3 feet
Figure 4b
www.easyheat.com
US T. (800) 537-4732 / F. (888) 324-2440
CAN T. (800) 794-3766 / F. (800) 361-4574