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• When precipitation is expected, start the slab heating system and let it
run at least 24 hours. This time is needed to allow the slab temperature
to reach the melting point.
• When the precipitation begins and after a full 24-hour warm-up period,
start to monitor the slab. Check if the precipitation is beginning to
accumulate or if it melts immediately.
• If there is accumulation, the slab temperature is too low. Increase the
Curve value by one number (for example, from 0 to 1).
• If the precipitation is melting immediately, the slab may be using more
energy than it needs. Decrease the Curve value by one number (for
example, from 0 to -1).
• After making a change to the Curve value, wait at least four hours
before evaluating its effect on the slab.
• Repeat the above procedure as necessary until the lowest Curve value
that still melts the snow is determined.
hEATING CURVE TABLE
Return Target Temperature based on the Outdoor Temperature and Heating Curve
35
-10
33
-9
36
-8
40
-7
44
-6
48
-5
51
-4
55
-3
59
-2
63
-1
66
0
70
1
74
2
78
3
81
4
85
5
89
6
93
7
96
8
100
9
104
10
108
SMC Installation and Operation Manual
Outdoor Temperature °F
30
25
20
40
48
55
44
52
60
48
56
64
52
60
69
56
65
73
60
69
78
64
73
82
68
77
87
72
82
91
76
86
96
80
90
100
84
94
105
88
99
109
92
103
114
96
107
118
100
111
123
104
116
127
108
120
132
112
124
136
116
128
141
120
133
145
15
10
5
63
70
78
67
75
83
72
80
88
77
85
93
82
90
99
86
95
104
91
100
109
96
105
114
101
110
120
105
115
125
110
120
130
115
125
135
120
130
141
124
135
146
129
140
151
134
145
156
139
150
162
143
155
167
148
160
172
153
165
177
158
170
183
0
-5
-10
85
93
100
91
98
106
96
104
112
102
110
118
107
116
124
113
121
130
118
127
136
124
133
142
129
139
148
135
144
154
140
150
160
146
156
166
151
162
172
157
167
178
162
173
184
168
179
190
173
185
196
179
190
202
184
196
208
190
202
214
195
208
220
27
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