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SEASON
Summer, Winter
Hold MENU Button: <Settings>/Season
• The Season setting controls whether the SMC heats the slab. When set
to Summer, the SMC does not provide any heat to the slab. When set
to Winter, the SMC shall heat the slab whenever necessary.
• Set the control to Winter mode during the heating season.
• When the heating season is over, it is a good practice to switch the
control to Summer to preserve the control battery life.
WarM WEaThEr CuToff (WWC)
Adjustable from 34°F/1°C to 44°F/7°C
Hold MENU Button: <Settings>/Warm W. Cutoff
• The WWC is the slab heating upper limit. When the Sensor Type is set
to Slab, the WWC is measured by the Slab Sensor. See "Sensor Type"
on page 22. If the slab temperature rises higher than the WWC, heating
will not begin even when moisture is detected.
• When the slab temperature falls below the WWC, the heating system
will hold the slab at the ISP temperature until moisture is detected. A
±1F° differential is included in the WWC. This means that if the WWC
is set for 38°F, the slab temperature must fall to 37°F before the heating
system is activated. The heating system will remain activated until the
slab temperature reaches 39°F.
• Once moisture has been detected and the slab temperature is below the
WWC, melting begins. At this point, the WWC will serve as the set point
at which the slab temperature will be held. Using the previous example,
once a melting cycle has begun, the SMC will maintain the slab at 38°
until the moisture is evaporated, or the minimum run time is exceeded,
whichever comes last.
• When Outdoor is selected as the Sensor Type, the WWC is measured
by the Outdoor Sensor. See "Sensor Type" on page 22. When the
outdoor temperature falls below the WWC then the heating system will
hold the slab return temperature at the slab return calculated target.
IDlE SET PoInT (ISP)
Available Only when Slab is the Sensor Type
Adjustable from 20°F/-7°C to 44°F/7°C, and Off
Hold MENU Button: <Settings>/Idle Set Point
• The ISP is the temperature at which the slab will be held whenever the
SMC is in Idle Mode. See "Slab Sensor Operation Overview" on page 4.
• The ISP can be turned OFF, so the slab is not heated unless moisture is
detected.
hEATING CURVE
Available Only when Outdoor Sensor is the Sensor Type
Adjustable from -10 to +10
Hold MENU Button: <Settings>/Heating Curve
• The Curve adjusts the final Return Target based on the outdoor
temperature. "Heating Curve Table" on page 27.
• A higher curve number will result in a higher Return Target.
• The best curve is the one with the lowest number that can still melt
snow. Therefore, provide the best snow melting efficiency for that slab.
26
-------- SEASoN -------
Default: Winter
Winter
Summer
BACK
WARM WEATHER CUToFF
Default: 38°F/3°C
[
BACK
-- IdLE SET PoINT --
[
Default: 34°F/1°C
BACK
-- HEATING CURVE --
[
Default: 0
BACK
SMC Installation and Operation Manual
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38 F
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34 F
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