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BLOWER DATA

ML180UH045E36A PERFORMANCE (Less Filter)

External 

Static 

Pressure 

in. w.g.

Air Volume / Watts at Various Blower Speeds

High 

(Black)

Medium-High 

(Brown)

Medium 

(Blue)

Medium-Low 

(Yellow)

Low 

(Red)

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

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 

Static 

Pressure 

in. w.g.

Air Volume / Watts at Various Blower Speeds

High 

(Black)

Medium-High 

(Brown)

Medium 

(Blue)

Medium-Low 

(Yellow)

Low 

(Red)

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

0.00

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

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

ML180UH070E36A PERFORMANCE (Less Filter)

External 

Static 

Pressure 

in. w.g.

Air Volume / Watts at Various Blower Speeds

High 

(Black)

Medium-High 

(Brown)

Medium 

(Blue)

Medium-Low 

(Yellow)

Low 

(Red)

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

0.00

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

0.10

1435

282

1215

178

1120

147

1095

133

930

88

0.20

1400

290

1170

187

1090

154

1050

141

875

98

0.30

1365

303

1145

198

1055

164

1025

153

845

102

0.40

1335

311

1105

206

1015

172

985

160

795

110

0.50

1310

325

1075

216

980

177

945

169

760

117

0.60

1285

341

1040

224

950

187

905

175

705

125

0.70

1250

344

1010

235

905

196

865

183

665

129

0.80

1215

354

975

244

860

204

830

191

625

136

ML180UH090E48B PERFORMANCE (Less Filter)

External 

Static 

Pressure 

in. w.g.

Air Volume / Watts at Various Blower Speeds

High 

(Black)

Medium-High 

(Brown)

Medium 

(Blue)

Medium-Low 

(Yellow)

Low 

(Red)

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

cfm

Watts

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

Содержание MERIT ML180UH045E36A

Страница 1: ...Propane operation ML180UHE X model units are equipped with a hot sur face ignition system The ML180UHE X unit meets the California Nitrogen Oxides NOx Standards and Califor nia Seasonal Efficiency re...

Страница 2: ...15 15 Shipping Data lbs 1 package 111 111 127 142 SPECIFICATIONS Gas Heating Performance Model No ML180UH090E60C ML180UH110E60C ML180UH135E60D Model No Low Nox ML180UH110XE60C 1 AFUE 80 80 80 Input B...

Страница 3: ...h Altitude Pressure Switch Kit Natural Gas to LPG Propane Kit LPG Propane to Natural Gas Kit Natural Gas High Altitude Orifice Kit 0 4500 ft 4501 7500 ft 7501 10 000 ft 0 7500 ft 7501 10 000 ft 0 7500...

Страница 4: ...35 0 70 1190 350 1000 235 855 205 790 190 540 140 0 80 1160 365 925 245 790 205 735 200 445 145 ML180UH070E36A PERFORMANCE Less Filter External Static Pressure in w g Air Volume Watts at Various Blowe...

Страница 5: ...0 2255 640 1940 420 1750 310 1580 230 1485 185 2290 655 1980 425 1775 310 1605 235 1495 195 0 10 2200 655 1910 440 1705 315 1535 240 1385 190 2250 675 1945 445 1730 320 1555 245 1400 190 0 20 2150 675...

Страница 6: ...er Box includes sensor ignitor and rollout switches Combustion Air Inducer Combustion Air Inducer Pressure Switch Heat Exchanger Upper Access Panel Blower Access Panel Primary Limit under combustion a...

Страница 7: ...e hot surface ignition control system consisting of an in tegrated control figure 3 with control terminal designations in tables 1 2 and 3 sensor and ignitor figure 6 The in tegrated control and ignit...

Страница 8: ...e Switch In 11 Rollout Switch In 12 Gas Valve Out TABLE 3 1 4 Quick Connect Terminals 120HUM Humidifier 120VAC LINE 120VAC XFMR Transformer 120VAC CIRC Indoor blower 120VAC EAC Indoor air quality acce...

Страница 9: ...Switch failed to close or opened during heat demand 10 Watchguard Pressure Switch opened 5 times during one heat demand 11 Pressure Switch stuck closed prior to activation of combustion air inducer 12...

Страница 10: ...out Switch Open 9 Pressure Switch failed to close or opened during heat demand 10 Watchguard Pressure Switch opened 5 times during one heat demand 11 Pressure Switch stuck closed prior to activation o...

Страница 11: ...air temperature once the heat demand is satisfied Note the supply air temperature at the instant the blower is de energized Adjust the fan off delay to achieve a supply air tempera ture between 90 11...

Страница 12: ...c er See figure 7 When excess heat is sensed in the heat exchanger the limit will open If the limit is open the in tegrated control energizes the supply air blower and clos es the gas valve The limit...

Страница 13: ...ire 5 Connect lead to Terminal FS on integrated control 6 Turn supply voltage on and close thermostat contacts to cycle system 7 When main burners are in operation for two minutes take reading TABLE 6...

Страница 14: ...s after the gas valve closes post purge A pressure switch mounted on the combustion air inducer orifice plate is used to prove inducer operation The com bustion air inducer orifice will be different f...

Страница 15: ...diameter probes in order not to damage plug Check voltage during 20 second ignitor warm up period Voltage should read 120 volts 10 If voltage reads below these values check for correct supply voltage...

Страница 16: ...ive to atmospheric pressure If the flue becomes obstructed during operation the switch senses a loss of negative pressure pressure becomes more equal with atmospheric pressure and opens the cir cuit t...

Страница 17: ...then reinstall the mounting screws See unit Installation Instructions for more detail IMPORTANT The combustion air pressure switch must be moved for horizontal discharge air left position vent pipe v...

Страница 18: ...roubleshooting Troubleshooting the motor is an easy process Follow steps below 1 Shut off power to unit 2 Remove input plugs P48 and P49 from motor See figure 14 for troubleshooting procedure If corre...

Страница 19: ...peed tap used for continuous fan 1 2 3 4 or 5 on input plug P49 If 24 volts is not present problem may be up stream of plug P49 Proceed to test 4 Multi Meter set to VAC 12 0 12 0 24 Multi Meter set to...

Страница 20: ...ximately the same resistance within an ohm 3 Check to see if the blower wheel spins freely Motor Test FIGURE 17 TABLE 9 Scale Measurement range in words ohms 2 M two megohm two million ohms 0 2 000 00...

Страница 21: ...ervice is to be performed 3 Remove the upper access panel 4 Move gas valve switch to OFF position Do not force See figure 19 5 Replace the upper access panel B Safety or Emergency Shutdown Disconnect...

Страница 22: ...fitting Connect to a test gauge to measure supply pressure 2 Start unit and allow 5 minutes for unit to reach steady state 3 After allowing unit to stabilize for 5 minutes record supply pressure and...

Страница 23: ...0 135 Nat 3 5 3 5 2 9 3 5 4 5 13 0 LP Propane 10 0 10 0 9 6 10 0 11 0 13 0 TABLE 13 Pressure Switch and Gas Conversion Kits at all Altitudes Model Input Size High Altitude Pressure Switch Kit High Al...

Страница 24: ...es a poor or partial ground Compare the readings to the table below If the readings exceed the maximum shown in table 14 make repairs before operating the furnace 2 In addition measure the AC voltage...

Страница 25: ...ate TEMPERATURE RISE Supply Duct Temperature ________ Return Duct Temperature _ _____ Temperature Rise ________ SUPPLY AIR Temperatures RETURN AIR FIGURE 23 C External Static Pressure 1 Tap locations...

Страница 26: ...t exchanger and clean if necessary 6 Check the cleanliness of blower assembly and clean the housing blower wheel and blower motor if necessary The blower motors are prelubricated for extended bearing...

Страница 27: ...alve rollout switches primary limit switch and make up box then disconnect them 4 Remove the screws that secure the combustion air inducer pressure switch assembly to the collector box Carefully remov...

Страница 28: ...NOx units only Replace NOx inserts 15 Reinstall collector box and combustion air assembly Reinstall all screws to the collector box and combustion air inducer Failure to replace all screws may cause l...

Страница 29: ...rol energizes B6 combustion air inducer S18 combustion air pressure switch closes Once S18 closes a 15 second pre purge follows 6 A92 integrated control energizes R33 ignitor A 20 second warm up perio...

Страница 30: ...OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER ON HEATING SPEED LED FLASHES CODE 11 PRESSURE SWITCH CLOSED GAS VALVE OFF COMBUSTION AIR INDUCER OFF INDOOR BLOWER OFF WITH DELAY Sequence holds until press...

Страница 31: ...NCE FOUR TIMES FLAME SIGNAL 1 5 MICROAMPS OR GREATER YES YES YES ROLLOUT SWITCH CLOSED LED FLASHES CODE 8 ROLLOT SWITCH OPEN GAS VALVE POWER OFF COMBUSTION AIR INDUCER POWER ON INDOOR BLOWER ON SEQUEN...

Страница 32: ...SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT COOLING CYCLE THERMOSTAT CALLS FOR COOLING COMPRESSOR CONTACTOR AND SYSTEM FAN ENERGIZED WITH 2 SECOND DELAY COOLING SPEED EAC TERM ENERGIZED COMPRESSOR O...

Страница 33: ...D EAC TERM REMAINS ON THERMOSTAT OPENS MANUAL FAN SELECTION MADE AT THERMOSTAT CONTROL G ENERGIZES SYSTEM FAN AT FAN SPEED EAC TERM ENERGIZED NO YES YES NO SYSTEM FAN SWITCHES TO HEAT SPEAD AFTER 30 S...

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