Lenox Lennox Merit Series Gas Furnace Upflow/Horizontal air discharge, ML180UHE 130

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TABLE 7

Vent Connector Capacity

Type B Double−Wall Vents with Single−Wall Metal Connectors

Serving Two or More Category I Appliances

 

 

 

 

 

Vent and Connector Diameter − D (inches)

 

 

 

Height

Lateral

 

 

 

 

 

 

 

 

 

 

 

 

 

3 Inch

4 Inch

 

 

5 Inch

 

6 Inch

H

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appliance Input Rating in Thousands of Btu Per Hour

 

 

 

(feet)

(feet)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIN

 

MAX

MIN

 

MAX

MIN

 

MAX

MIN

 

MAX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

NA

 

NA

NA

 

NA

NA

 

NA

NA

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

2

NA

 

NA

NA

 

NA

NA

 

NA

168

 

182

 

3

NA

 

NA

NA

 

NA

121

 

131

175

 

198

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

NA

 

NA

NA

 

NA

NA

 

NA

NA

 

NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

2

NA

 

NA

NA

 

NA

125

 

126

184

 

193

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

NA

 

NA

NA

 

NA

130

 

138

191

 

208

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

NA

 

NA

NA

 

NA

119

 

121

182

 

186

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

2

NA

 

NA

84

 

85

124

 

134

189

 

203

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

NA

 

NA

89

 

91

129

 

144

197

 

217

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

NA

 

NA

79

 

87

116

 

138

177

 

214

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

2

NA

 

NA

83

 

94

121

 

150

185

 

230

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

NA

 

NA

87

 

100

127

 

160

193

 

243

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

49

 

56

78

 

97

115

 

152

175

 

238

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

2

52

 

59

82

 

103

120

 

163

182

 

252

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

55

 

62

87

 

107

125

 

172

190

 

264

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

47

 

60

77

 

110

112

 

175

169

 

278

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

2

51

 

62

81

 

115

117

 

185

177

 

290

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

54

 

64

85

 

119

122

 

193

185

 

300

NOTE − Single appliance venting configurations with zero lateral lengths are assumed to have no elbows in the vent system. For all other vent configurations, the vent system is assumed to have two 90° elbows. For each additional 90° elbow or equivalent (for example two 45° elbows equal one 90° elbow) beyond two, the maximum capacity listed in the venting table should be reduced by 10 percent (0.90 x maxi- mum listed capacity).

TABLE 8

Common Vent Capacity

Type B Double−Wall Vents with Single−Wall Metal Connectors

Serving Two or More Category I Appliances

Vent

 

 

 

Common Vent Diameter − D (inches)

 

 

 

 

 

 

 

 

 

 

 

Height

4 Inch

5 Inch

6 Inch

7 Inch

 

 

 

 

 

 

 

 

 

H

 

 

Appliance Input Rating in Thousands of Btu Per Hour

 

 

(feet)

 

 

 

 

 

 

 

 

 

FAN + FAN

FAN + NAT

FAN + FAN

 

FAN + NAT

FAN + FAN

FAN + NAT

FAN + FAN

FAN + NAT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

NA

78

NA

 

113

200

158

304

244

 

 

 

 

 

 

 

 

 

 

8

NA

87

NA

 

126

218

173

331

269

 

 

 

 

 

 

 

 

 

 

10

NA

94

163

 

137

237

189

357

292

 

 

 

 

 

 

 

 

 

 

15

121

108

189

 

159

275

221

416

343

 

 

 

 

 

 

 

 

 

 

20

131

118

208

 

177

305

247

463

383

 

 

 

 

 

 

 

 

 

 

30

145

132

236

 

202

350

286

533

446

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Contents Table of Contents Installation Instructions ML180UHETOP View Unit Dimensions − inches mmMake−Up Box Heat Exchanger Combustion Air Inducer Parts ArrangementBurner Box Gas ValveSafety Information ML180UHE Gas FurnaceShipping and Packing List General Use of Furnace as Construction HeaterCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment in Confined Space Setting Equipment Return Air Right Horizontal Application Installation Clearances Top LeftEnd Bottom Typical Horizontal ApplicationDuct System FiltersUpflow Position VentingTop Vent Discharge Left Side Vent DischargeHorizontal Left Position Horizontal Left Position Horizontal Right PositionSide Vent Discharge Side Vent Discharge − no modifications necessaryVent Connection Upflow and Horizontal Position Common Venting Using Metal−Lined Masonry Chimney −1/2 18 − The common vent diameter must always be at least as Cated or common venting system, you must inspectFeet FAN + FAN FAN + NAT 130 Carbon Monoxide Poisoning Hazard − In some localities, codes may require the installation Ers or straps. Install a drip leg in vertical pipe runs toGas Piping Gas supply piping should not allow more than 0.5W.C. dropHorizontal Application Left−Side Air DischargeRight−Side Air Discharge Interior MAKE−UP BOX Installation ElectricalElectrostatic Discharge ESD Thermostat Designations ML180UHE Schematic Wiring Diagram and Sequence of Operation Integrated Control Typical ML180UHE Field Wiring DiagramUnit Start−Up For Your Safety Read Before LightingGAS Meter Clocking Chart Gas Pressure AdjustmentProper Combustion High AltitudeManifold Pressure Settings at all Altitudes Other Unit AdjustmentsNo Jumper Heat FAN-OFF Time in Seconds995 1380975 115 945 1345Order to maintain proper air velocity Single Side Return Air − Air volumes in bold require field640 1940 420 1750 310 230Electrical SHOCK, Fire Or Explosion Hazard ServiceHeat Exchanger Removal ML180UHE BURNER, Combustion AIR Inducer Assembly−090, −110 −135 units −045 and −070 unitsRepair Parts List Planned ServiceRED LED Integrated Control Diagnostic CodesHeating Sequence of Operation Normal Heating Mode Abnormal Heating ModeHeating Sequence Cooling Sequence of Operation Normal Cooling Mode Abnormal Cooling ModeContinuous FAN Sequence of Operation Start−Up & Performance Check List Temperature Rise Cooling ModeUnit Operation Drain Line

Lennox Merit Series Gas Furnace Upflow/Horizontal air discharge, ML180UHE specifications

The Lenox ML180UHE is a reliable and efficient gas furnace that falls within the Lennox Merit Series. This model is designed for upflow or horizontal air discharge, making it versatile for various installation requirements. With its robust construction and advanced technology, the ML180UHE is ideal for homeowners seeking a dependable heating solution that combines comfort and efficiency.

One of the main features of the ML180UHE is its impressive 80% Annual Fuel Utilization Efficiency (AFUE) rating. This efficiency means that 80 cents of every dollar spent on fuel is used to heat your home while minimizing waste. This furnace is equipped with a multi-speed blower motor that enhances the overall air circulation in your home, providing consistent temperatures and improved comfort.

The ML180UHE features a durable heat exchanger made of high-quality materials, which ensures longevity and reliable performance. The design of the heat exchanger maximizes heat transfer efficiency, allowing the furnace to quickly warm your home while also maintaining optimal efficiency levels throughout its lifespan.

Lennox has integrated advanced technologies into the ML180UHE to enhance its operation and user experience. The unit is compatible with a variety of thermostats, including Lennox's innovative iComfort S30 Smart Thermostat, allowing for easy temperature control and programming capabilities. This smart technology can learn your preferences, optimize energy usage, and enable remote access through a smartphone app.

In addition to its energy efficiency, the ML180UHE offers quiet operation, making it an excellent choice for residential environments. The well-insulated cabinet helps to reduce noise levels, providing a peaceful indoor atmosphere.

Installation and maintenance are simplified with the ML180UHE due to its compact design and accessible components. The furnace is designed to fit into tight spaces, allowing for flexible installation options. Regular maintenance is uncomplicated, ensuring that homeowners can keep the unit running at peak performance with minimal effort.

Overall, the Lennox ML180UHE gas furnace provides users with a reliable, efficient, and quiet heating solution. With its combination of advanced technology, durable design, and ease of use, it is an excellent choice for anyone looking to enhance the comfort of their home while optimizing energy consumption.