heat-timer DiGi-SPAN Elite Series Installation And Operation Instruction Manual page 6

Return Target Temperature Table
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
Slab ΔT
Options: From 5°F/3°C to 50°F/28°C
/<Set Point>/Slab DT
SET
• The.Slab ΔT is the design temperature difference between the slab supply temperature and the slab
return temperature of the heating fluid. It is set to prevent too much heat from entering the slab in
a short time. Since, if large amounts of energy transferred to the slab exceeds a safe limit, the slab
may get damaged.
• This value is normally provided by the slab design engineer and must be adjusted to that setting to
prevent from damaging the slab.
• During the warm-up period, the RSM-Elite will modulate the motorized valve to regulate the
amount of energy entering the slab based on that setting. If that value is reached, the control will
modulate the motorized valve close to prevent sudden increases in slab temperature.
• If the design Slab ΔT is unknown, set it to the smallest possible value.
Outdoor Cutoff
Options: Off, 20ºF/-6ºC to 50ºF/10ºC, On
/<Set Point>/Outdoor Cutoff
SET
• The Outdoor temperatures can be viewed from the default screen by clicking the Up or Down
buttons.
• When the outdoor temperature falls to the adjustable Outdoor Cutoff temperature, the RSM-Elite
will control the System Pump and Motorized valve relays to heat the slab.
• When the outdoor temperature rises to the Outdoor Cutoff plus a 2°F differential, the RSM-Elite
will energize the Motorized Valve Close relay for 6 minutes to guarantee valve closure. This will
prevent the slab from getting heated during warmer outdoor temperature. The System relay will
remain energized for the Run-On delay.
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
6
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
Default: 20°F/11°C
Default: 38ºF/3ºF
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
Slab DT:
20 F 25 F
WARNINg
The adjustment of the Slab
ΔT to higher than the slab
design might crack the slab
during the heating process.
Cutoff:
30 F 35 F