Aerco BENCHMARK 2500DF User Manual page 159

Dual fuel gas-fired boiler
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Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
APPENDIX F – INDOOR/OUTDOOR RESET RATIO CHARTS
Table F-5: Header Temperature for a Building Reference Temperature of 75F
Air
0.6
0.8
Temp
75F
75
75
70F
78
79
65F
81
83
60F
84
87
55F
87
91
50F
90
95
45F
93
99
40F
96
103
35F
99
107
30F
102
111
25F
105
115
20F
108
119
15F
111
123
10F
114
127
5F
117
131
0F
120
135
-5F
123
139
-10F
126
143
-15F
129
147
Table F-6: Header Temperature for a Building Reference Temperature of 80F
Air
0.6
0.8
Temp
80F
80
80
75F
83
84
70F
86
88
65F
89
92
60F
92
96
55F
95
100
50F
98
104
45F
101
108
40F
104
112
35F
107
116
30F
110
120
25F
113
124
20F
116
128
15F
119
132
10F
122
136
5F
125
140
0F
128
144
-5F
131
148
-10F
134
152
OMM-0099_0A
GF-145
RESET RATIO
1.0
1.2
1.4
75
75
75
80
81
82
85
87
89
90
93
96
95
99
103
100
105
110
105
111
117
110
117
124
115
123
131
120
129
138
125
135
145
130
141
152
135
147
159
140
153
166
145
159
173
150
165
180
155
171
187
160
177
194
165
183
201
RESET RATIO
1.0
1.2
1.4
80
80
80
85
86
87
90
92
94
95
98
101
100
104
108
105
110
115
110
116
122
115
122
129
120
128
136
125
134
143
130
140
150
135
146
157
140
152
164
145
158
171
150
164
178
155
170
185
160
176
192
165
182
199
170
188
206
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
1.6
1.8
2.0
75
75
75
83
84
85
91
93
95
99
102
105
107
111
115
115
120
125
123
129
135
131
138
145
139
147
155
147
156
165
155
165
175
163
174
185
171
183
195
179
192
205
187
201
215
195
210
203
219
211
219
1.6
1.8
2.0
80
80
80
88
89
90
96
98
100
104
107
110
112
116
120
120
125
130
128
134
140
136
143
150
144
152
160
152
161
170
160
170
180
168
174
190
176
188
200
184
197
210
192
206
200
215
208
216
2.2
2.4
75
75
86
87
97
99
108
111
119
123
130
135
141
17
152
159
163
171
174
183
185
195
196
207
207
219
218
2.2
2.4
80
80
91
92
102
104
113
116
124
128
135
140
146
152
157
164
168
176
179
188
190
200
201
212
212
Page 159 of 234
PR1: 05/21/2014

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