Appendix E: Indoor/Outdoor Reset Ratio Charts - Watts Aerco BENCHMARK 750 User Manual

Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
APPENDIX E – INDOOR/OUTDOOR RESET RATIO CHARTS

Appendix E: INDOOR/OUTDOOR RESET RATIO CHARTS

Table E-1. Header Temperature for a Building Reference Temperature = 50°F (10.0°C)
Air Temp 0.6
°F °C
50 10.0 50
45
7.2 53
40 56
4.4
35 1.7 59
30 -1.1 62
25 65
-3.9
20 -6.7 68
15 -9.4 71
10 -12.2 74
5 -15.0 77
0 -17.8 80
-5 -20.6 83
-10 -23.3 86
-15 -26.1 89
-20 -28.9 92
Table E-2. Header Temperature for a Building Reference Temperature = 60°F (15.6°C)
Air Temp
0.6
°F °C
60 15.6 60
55 12.8 63
50 10.0 66
45 7.2 69
40 4.4 72
35 1.7 75
30 -1.1 78
25 -3.9 81
20 -6.7 84
15 -9.4 87
10 -12.2 90
5 -15.0 93
0 -17.8 96
-5 -20.6 99
-10 -23.3 102
-15 -26.1 105
-20 -28.9 108
OMM-0119_0A
GF-130-I
0.8 1.0 1.2
50 50 50
54 55 56
58 60 62
62 65 68
66 70 74
70 75 80
74 80 86
78 85 92
82 90 98
86 95 104
90 100 110
94 105 116
98 110 122
102 115 128
106 120 134
0.8 1.0 1.2
60 60 60
64 65 66
68 70 72
72 75 78
76 80 84
80 85 90
84 90 96
88 95 102
92 100 108
96 105 114
100 110 120
104 115 126
108 120 132
112 125 138
116 130 144
120 135 150
124 140 156
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
RESET RATIO
1.4 1.6 1.8
50 50 50
57 58 59
64 66 68
71 74 77
78 82 86
85 90 95
92 98 104
99 106 113
106 114 122
113 122 131
120 130 140
127 138 149
134 146 158
141 154 167
148 162 176
RESET RATIO
1.4 1.6 1.8
60 60 60
67 68 69
74 76 78
81 84 87
88 92 96
95 100 105
102 108 114
109 116 123
116 124 132
123 132 141
130 140 150
137 148 159
144 156 168
151 164 177
158 172 186
165 180 195
172 188 204
2.0 2.2 2.4
50 50 50
60 60 62
70 72 74
80 83 86
90 94 98
100 105 110
110 116 122
120 127 134
130 138 146
140 149 158
150 160 170
160 171 182
170 182 194
180 193 206
190 204 218
2.0 2.2 2.4
60 60 60
70 71 72
80 82 84
90 93 96
100 104 108
110 115 120
120 126 132
130 137 144
140 148 156
150 159 168
160 170 180
170 181 192
180 192 204
190 203 216
200 214
210
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11/03/2016