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Appendix d: indoor/outdoor reset ratio charts, Benchmark 1.5ln low nox boiler, Gf-120 – AERCO BMK 1.5 LN July 2011 User Manual

Page 111

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PR2: 05/01/11 Page

111 of 152

Benchmark 1.5LN Low NOx Boiler

Operation and Maintenance Manual

OMM-0041_0D

GF-120

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288

APPENDIX D: INDOOR/OUTDOOR RESET RATIO CHARTS

Table D-1: Header Temperature for a Building Reference Temperature of 50F

RESET RATIO

Air

Temp

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

50F

50

50

50

50

50

50

50

50

50

50

45F

53

54

55

56

57

58

59

60

60

62

40F

56

58

60

62

64

66

68

70

72

74

35F

59

62

65

68

71

74

77

80

83

86

30F

62

66

70

74

78

82

86

90

94

98

25F

65

70

75

80

85

90

95

100

105

110

20F

68

74

80

86

92

98

104

110

116

122

15F

71

78

85

92

99

106

113

120

127

134

10F

74

82

90

98

106

114

122

130

138

146

5F

77

86

95

104

113

122

131

140

149

158

0F

80

90

100

110

120

130

140

150

160

170

-5F

83

94

105

116

127

138

149

160

171

182

-10F

86

98

110

122

134

146

158

170

182

194

-15F

89

102

115

128

141

154

167

180

193

206

-20F

92

106

120

134

148

162

176

190

204

218

Table D-2: Header Temperature for a Building Reference Temperature of 60F

RESET RATIO

Air

Temp

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

60F

60

60

60

60

60

60

60

60

60

60

55F

63

64

65

66

67

68

69

70

71

72

50F

66

68

70

72

74

76

78

80

82

84

45F

69

72

75

78

81

84

87

90

93

96

40F

72

76

80

84

88

92

96

100

104

108

35F

75

80

85

90

95

100

105

110

115

120

30F

78

84

90

96

102

108

114

120

126

132

25F

81

88

95

102

109

116

123

130

137

144

20F

84

92

100

108

116

124

132

140

148

156

15F

87

96

105

114

123

132

141

150

159

168

10F

90

100

110

120

130

140

150

160

170

180

5F

93

104

115

126

137

148

159

170

181

192

0F

96

108

120

132

144

156

168

180

192

204

-5F

99

112

125

138

151

164

177

190

203

216

-10F

102

116

130

144

158

172

186

200

214

-15F

105

120

135

150

165

180

195

210

-20F

108

124

140

156

172

188

204