Lenox Official Manual for Gas Furnace - Performance and Installation Guidelines

Page 20

TABLE 5

Vent Connector Capacity

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

Serving Two or More Category I Appliances

Vent

Connector

 

 

 

Vent and Connector Diameter − D (inches)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Height

Rise

 

3 Inch

 

4 Inch

 

5 Inch

 

6 Inch

 

 

 

 

 

 

 

 

 

 

 

 

H

R

 

 

 

Appliance Input Rating in Thousands of Btu Per Hour

 

 

 

(feet)

(feet)

 

 

 

 

 

 

 

 

 

 

 

 

MIN

 

MAX

MIN

 

MAX

MIN

 

MAX

MIN

 

MAX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

22

 

37

35

 

66

46

 

106

58

 

164

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

2

23

 

41

37

 

75

48

 

121

60

 

183

 

3

24

 

44

38

 

81

49

 

132

62

 

199

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

22

 

40

35

 

72

49

 

114

64

 

176

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

2

23

 

44

36

 

80

51

 

128

66

 

195

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

24

 

47

37

 

87

53

 

139

67

 

210

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

22

 

43

34

 

78

49

 

123

65

 

189

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

2

23

 

47

36

 

86

51

 

136

67

 

206

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

24

 

50

37

 

92

52

 

146

69

 

220

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

21

 

50

33

 

89

47

 

142

64

 

220

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

2

22

 

53

35

 

96

49

 

153

66

 

235

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

24

 

55

36

 

102

51

 

163

68

 

248

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

21

 

54

33

 

99

46

 

157

62

 

246

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

2

22

 

57

34

 

105

48

 

167

64

 

259

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

23

 

60

35

 

110

50

 

176

66

 

271

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

20

 

62

31

 

113

45

 

181

60

 

288

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

2

21

 

64

33

 

118

47

 

190

62

 

299

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

22

 

66

34

 

123

48

 

198

64

 

309

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TABLE 6

Common Vent Capacity

Type B Double−Wall Vents with Type B Double−Wall 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

92

81

140

 

116

204

161

309

248

 

 

 

 

 

 

 

 

 

 

8

101

90

155

 

129

224

178

339

275

 

 

 

 

 

 

 

 

 

 

10

110

97

169

 

141

243

194

367

299

 

 

 

 

 

 

 

 

 

 

15

125

112

195

 

164

283

228

427

352

 

 

 

 

 

 

 

 

 

 

20

136

123

215

 

183

314

255

475

394

 

 

 

 

 

 

 

 

 

 

30

152

138

244

 

210

361

297

547

459

 

 

 

 

 

 

 

 

 

 

Page 20

Image 20
Contents Installation Instructions ML180UHE Table of ContentsUnit Dimensions − inches mm TOP ViewParts Arrangement Make−Up Box Heat Exchanger Combustion Air InducerBurner Box Gas ValveShipping and Packing List Safety InformationML180UHE Gas Furnace Use of Furnace as Construction Heater GeneralCombustion, Dilution & Ventilation Air Equipment in Confined Space ALL AIR from Inside Equipment in Confined Space Setting Equipment Return Air Horizontal Application Installation Clearances Top Left RightEnd Bottom Typical Horizontal ApplicationFilters Duct SystemVenting Upflow PositionTop Vent Discharge Left Side Vent DischargeHorizontal Left Position Horizontal Right Position Horizontal Left PositionSide Vent Discharge Side Vent Discharge − no modifications necessaryVent Connection Upflow and Horizontal Position Common Venting Using Metal−Lined Masonry Chimney −1/2 Cated or common venting system, you must inspect 18 − The common vent diameter must always be at least asFeet FAN + FAN FAN + NAT 130 Carbon Monoxide Poisoning Hazard Ers or straps. Install a drip leg in vertical pipe runs to − In some localities, codes may require the installationGas Piping Gas supply piping should not allow more than 0.5W.C. dropRight−Side Air Discharge Horizontal ApplicationLeft−Side Air Discharge Electrostatic Discharge ESD Interior MAKE−UP BOX InstallationElectrical Thermostat Designations ML180UHE Schematic Wiring Diagram and Sequence of Operation Typical ML180UHE Field Wiring Diagram Integrated ControlFor Your Safety Read Before Lighting Unit Start−UpGas Pressure Adjustment GAS Meter Clocking ChartProper Combustion High AltitudeOther Unit Adjustments Manifold Pressure Settings at all AltitudesHeat FAN-OFF Time in Seconds No Jumper1380 995975 115 945 1345Single Side Return Air − Air volumes in bold require field Order to maintain proper air velocity640 1940 420 1750 310 230Service Electrical SHOCK, Fire Or Explosion HazardML180UHE BURNER, Combustion AIR Inducer Assembly Heat Exchanger Removal−090, −110 −135 units −045 and −070 unitsPlanned Service Repair Parts ListIntegrated Control Diagnostic Codes RED LEDNormal Heating Mode Abnormal Heating Mode Heating Sequence of OperationHeating Sequence Normal Cooling Mode Abnormal Cooling Mode Cooling Sequence of OperationContinuous FAN Sequence of Operation Start−Up & Performance Check List Cooling Mode Temperature RiseUnit 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.