Lenox Lennox Merit Series Gas Furnace Upflow/Horizontal air discharge 1380, 995, 975 115 945, 950

Page 33

BLOWER DATA

ML180UH045E36A PERFORMANCE (Less Filter)

External

 

 

 

 

Air Volume / Watts at Various Blower Speeds

 

 

 

 

Static

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High

Medium-High

Medium

Medium-Low

 

Low

Pressure

 

 

cfm

 

Watts

cfm

Watts

cfm

Watts

cfm

 

Watts

cfm

 

Watts

in. w.g.

 

 

 

0.00

1380

 

265

1155

165

995

120

975

 

115

945

 

105

0.10

1345

 

270

1120

175

950

120

880

 

105

865

 

100

0.20

1320

 

285

1080

190

900

125

805

 

105

700

 

85

0.30

1290

 

295

1055

200

875

135

750

 

110

640

 

90

0.40

1265

 

310

1010

205

825

145

710

 

120

595

 

95

0.50

1230

 

315

990

215

790

155

660

 

125

535

 

100

0.60

1190

 

330

945

230

750

165

630

 

135

500

 

110

0.70

1165

 

340

915

235

705

170

570

 

140

435

 

115

0.80

1130

 

350

880

245

670

180

535

 

150

380

 

120

ML180UH070E36B PERFORMANCE (Less Filter)

External

 

 

 

 

Air Volume / Watts at Various Blower Speeds

 

 

 

 

Static

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High

Medium-High

Medium

Medium-Low

 

Low

Pressure

 

 

cfm

 

Watts

cfm

Watts

cfm

Watts

cfm

 

Watts

cfm

 

Watts

in. w.g.

 

 

 

0.00

1415

 

265

1330

170

1215

135

1175

 

125

1075

 

85

0.10

1415

 

280

1295

170

1145

145

1130

 

130

955

 

95

0.20

1355

 

290

1225

185

1110

150

1080

 

140

885

 

100

0.30

1330

 

300

1190

200

1060

160

1035

 

155

825

 

110

0.40

1290

 

310

1155

205

1015

175

970

 

160

770

 

120

0.50

1245

 

325

1115

215

980

180

930

 

170

695

 

125

0.60

1225

 

335

1045

230

920

190

865

 

180

625

 

135

0.70

1190

 

350

1000

235

855

205

790

 

190

540

 

140

0.80

1160

 

365

925

245

790

205

735

 

200

445

 

145

ML180UH090E48B PERFORMANCE (Less Filter)

External

 

 

 

 

Air Volume / Watts at Various Blower Speeds

 

 

 

 

Static

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High

Medium-High

Medium

Medium-Low

 

Low

Pressure

 

 

cfm

 

Watts

cfm

Watts

cfm

Watts

cfm

 

Watts

cfm

 

Watts

in. w.g.

 

 

 

0.00

1785

 

380

1570

270

1440

220

1395

 

190

1190

 

120

0.10

1755

 

395

1535

275

1420

230

1350

 

205

1140

 

130

0.20

1730

 

415

1505

290

1380

245

1310

 

215

1110

 

145

0.30

1690

 

435

1460

305

1345

260

1275

 

230

1065

 

155

0.40

1645

 

440

1435

320

1310

270

1240

 

240

1010

 

165

0.50

1615

 

455

1395

335

1265

285

1180

 

255

955

 

180

0.60

1590

 

470

1350

350

1210

290

1150

 

265

915

 

185

0.70

1545

 

475

1300

360

1175

305

1095

 

275

860

 

200

0.80

N/A

 

N/A

1270

370

1140

310

1040

 

285

820

 

210

Page 33

Image 33
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.