Allied A80UH2E User manual

508187-01 Issue 2116 Page 1 of 51
SERVICE MANUAL
A80UH2E / 80G2UHE
(P) 508187-01
*P508187-01*
Table of Contents
Technical Specications - A80UH2E ...........................2
Technical Specications - 80G2UHE...........................7
Parts Arrangement.....................................................12
Unit Components.......................................................13
Flame Sensor ............................................................23
Gas Valve ..................................................................23
Heating Components.................................................23
Placement and Installation ........................................29
Start-Up .....................................................................29
Heating System Service Checks ...............................30
Typical Operating Characteristics..............................34
Maintenance..............................................................35
Wiring and Sequence of Operation ...........................39
Field Wiring and DIP Switch Settings........................42
Troubleshooting.........................................................46
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
Electric shock hazard.
Can cause injury or death. Before attempting
to perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
WARNING
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
CAUTION
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer (or
equivalent), service agency or the gas supplier.
WARNING

508187-01Issue 2116Page 2 of 51
Technical Specications - A80UH2E
PHYSICAL AND ELECTRICAL DATA
Model
High Fire Low Fire
AFUE
(ICUS)
Nom.
Cooling
Capacity
(tons)
Gas
Inlet
(in.)
Volts/
Hz/
Phase
Max.
Overcurrent
Protection
Nominal
F.L.A.
Trans.
(V.A.)
Motor
Output
(hp)
Approx.
Weight
(lbs.)
Input
(Btuh)
Output
(Btuh)
Input
(Btuh)
Output
(Btuh)
UPFLOW / HORIZONTAL
A80UH2E045A12 44,000 35,000 29,000 23,000 80.0 3 1/2 120-60-1 15 6.1 40 1/2 111
A80UH2E070A12 66,000 53,000 43,000 35,000 80.0 3 1/2 120-60-1 15 6.1 40 1/2 121
A80UH2E090B12 88,000 70,000 57,000 46,000 80.0 3 1/2 120-60-1 15 6.1 40 1/2 136
A80UH2E090B16 88,000 69,000 57,000 46,000 80.0 4 1/2 120-60-1 15 8.2 40 3/4 140
A80UH2E110C16 110,000 86,000 72,000 58,000 80.0 4 1/2 120-60-1 15 8.2 40 3/4 152
A80UH2E110C20 110,000 87,000 72,000 58,000 80.0 5 1/2 120-60-1 15 10.0 40 1 156
Note: For vent length and clearances to combustibles, please reference installation instructions.
Note: Filters and provisions for mounting are not furnished and must be field provided.
MODEL NUMBER GUIDE
Major Revision
Revision Code
Nom. CFM x 00
12 = 3 Ton add on cooling
16 = 4 Ton add on cooling
20 = 5 Ton add on cooling
Cabinet Width
A = 14.5” width
B = 17.5” width
C = 21.0” width
BTUH Input
Heating Input x 1000
A
Flagship
AFUE
80 = 80% Efficency
Configuration
UH = Upflow/Horizontal
Stages
2 = Two Stage
Blower Drive
E = Constant Torque ECM
A 80 UH 2 E 110 C 20 01

508187-01 Issue 2116 Page 3 of 51
BLOWER PERFORMANCE
A80UH2E045A12
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 1500 300 1220 175 1050 114 850 65 800 48
0.10 1485 311 1200 179 1025 118 810 68 790 50
0.20 1460 323 1170 188 980 125 725 73 580 53
0.30 1420 334 1140 195 930 133 670 76 455 54
0.40 1395 343 1095 203 890 138 600 86 375 60
0.50 1355 355 1050 212 840 149 550 93 325 64
0.60 1325 368 1020 222 790 158 495 96 275 67
0.70 1290 369 980 228 745 164 420 103 238 69
0.80 1260 381 945 238 700 172 380 107 --- ---
A80UH2E070A12
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 1375 340 1350 240 1110 190 970 93 780 50
0.10 1350 346 1325 254 1100 194 940 104 725 57
0.20 1330 346 1310 264 1080 200 895 113 680 64
0.30 1315 353 1280 272 1060 204 860 118 610 70
0.40 1300 368 1250 283 1040 212 810 125 550 76
0.50 1285 369 1220 293 1010 222 765 132 510 78
0.60 1260 384 1190 301 975 227 725 140 460 83
0.70 1240 391 1150 314 950 236 680 147 400 89
0.80 1210 399 1120 319 915 244 640 152 355 95
A80UH2E090B12
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 1605 313 1475 240 1320 173 1050 99 865 60
0.10 1565 323 1430 251 1270 185 995 108 800 68
0.20 1515 334 1380 264 1225 196 935 115 730 76
0.30 1475 347 1340 275 1170 207 870 124 645 83
0.40 1435 360 1300 285 1120 215 805 133 550 91
0.50 1395 369 1250 295 1065 225 715 140 470 98
0.60 1355 378 1205 307 1010 235 655 147 395 101
0.70 1305 391 1160 318 935 246 560 156 345 107
0.80 1265 404 1105 329 875 254 510 162 300 112

508187-01Issue 2116Page 4 of 51
A80UH2E090B16
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 1800 370 1555 260 1425 207 1370 172 1240 131
0.10 1765 381 1525 272 1390 218 1320 184 1190 144
0.20 1725 397 1485 283 1350 229 1255 195 1130 157
0.30 1685 416 1450 296 1310 241 1205 206 1075 165
0.40 1635 425 1390 312 1260 250 1165 217 1015 174
0.50 1600 438 1350 322 1205 263 1100 230 955 185
0.60 1560 453 1300 332 1140 270 1050 239 905 193
0.70 1520 467 1255 344 1110 284 1000 249 840 202
0.80 1470 474 1215 352 1050 294 935 258 765 211
A80UH2E110C16
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 1780 349 1570 248 1465 190 1370 169 1250 131
0.10 1750 365 1540 260 1420 205 1330 177 1205 140
0.20 1720 382 1500 271 1365 220 1280 187 1155 150
0.30 1675 397 1460 279 1330 228 1250 197 1110 159
0.40 1645 407 1415 291 1290 241 1200 211 1070 166
0.50 1605 424 1395 307 1250 249 1165 219 1015 177
0.60 1580 432 1345 316 1205 258 1105 228 960 186
0.70 1565 448 1300 328 1165 271 1060 237 915 194
0.80 1525 449 1270 339 1125 283 1025 246 865 203

508187-01 Issue 2116 Page 5 of 51
A80UH2E110C20
External
Static
Pressure
in. w.g.
Air Volume / Watts at Di󰀨erent Blower Speeds
Bottom Return Air, Side Return Air from Both Sides or Return Air from Bottom and One Side.
Single Side Return Air - Air volumes in bold (over 1800 cfm) require Optional Return Air Base and eld fabricated transition to accommodate 20 x 25 x 1 in. air lter in order to maintain proper air velocity.
High
(Black)
Medium-High
(Brown)
Medium
(Blue)
Medium-Low
(Yellow)
Low
(Red)
High
(Black)
Medium-High
(Brown)
Medium
(Blue)
Medium-Low
(Yellow)
Low
(Red)
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 2175 590 2050 410 1850 310 1695 275 1510 195 2175 605 1930 420 1785 320 1675 260 1500 195
0.10 2158 607 1943 421 1778 328 1650 283 1461 205 2129 628 1892 441 1733 345 1627 288 1458 209
0.20 2131 620 1897 436 1719 345 1591 299 1405 215 2091 649 1838 458 1691 360 1586 297 1407 220
0.30 2085 639 1847 456 1678 354 1563 308 1351 228 2072 660 1806 471 1631 371 1529 313 1353 232
0.40 2055 652 1806 466 1641 371 1499 317 1297 238 2014 677 1772 485 1591 385 1485 327 1302 243
0.50 2030 668 1767 476 1588 387 1462 333 1256 254 1977 690 1742 498 1554 395 1444 337 1252 256
0.60 1976 686 1724 495 1550 399 1419 348 1215 265 1960 707 1696 511 511 410 1412 348 1204 265
0.70 1949 700 1685 510 1512 408 1371 357 1168 271 1913 720 1661 525 1480 424 1351 359 1149 274
0.80 1896 716 1649 527 1473 419 1332 372 1121 287 1873 738 1617 538 1440 437 1313 371 1117 285

508187-01Issue 2116Page 6 of 51
ACCESSORIES
Accessory Catalog Number
Return Air Base
Return Air Base 14.5” 68W61
Return Air Base 17.5” 68W62
Return Air Base 21.0” 68W62
High Altitude Pressure Switches
2-Stage 80% UH/DF (4501 - 7500 ft) [045, 070, 090 110] 91W53
2-Stage 80% UH/DF (7501 - 10,000 ft) [045, 070, 090 110] 73W35
High Altitude Orice Kits (7500 ft+)
2-Stage 80% UH/DF - Natural Gas 51W01
2-Stage 80% UH/DF - Propane Gas 11K47
Natural to LP Kits
2-Stage 80% UH/DF (0 - 7500 ft) 11K48
2-Stage 80% UH/DF (7501 - 10,000 ft) 11K47
LP to Natural Kits
2-Stage 80% UH/DF 77W10
Downow Specic Air Filters
14.5" 51W06
17.5" 51W07
Downow Combustible Flooring Base
14.5" 11M59
17.5" 11M60
Night Service Kits
2-Stage 22J94
Horizontal Suspension Kit
80% & 90% 51W10
External Filter Rack Kits
1 pack (16 x 25) 1.841018
10 pack (16 x 25) 1.841039
Twinning Kit
Constant Torque Gas Furnace Twinning Kit 16W72
For vent length and clearances to combustibles, please reference installation instructions.

508187-01 Issue 2116 Page 7 of 51
Technical Specications - 80G2UHE
MODEL NUMBER GUIDE
PHYSICAL AND ELECTRICAL DATA
Model
High Fire Low Fire
AFUE
(ICUS)
Nom.
Cooling
Capacity
(tons)
Gas
Inlet
(in.)
Volts/
Hz/
Phase
Max.
Overcurrent
Protection
Nominal
F.L.A.
Trans.
(V.A.)
Motor
Output
(hp)
Approx.
Weight
(lbs.)
Input
(Btuh)
Output
(Btuh)
Input
(Btuh)
Output
(Btuh)
UPFLOW / HORIZONTAL
80G2UH045AE12 44,000 35,000 29,000 23,000 80.0 3 1/2 120-60-1 15 6.1 40 1/2 111
80G2UH070AE12
80G2UH070AE12L 66,000 53,000 43,000 35,000 80.0 3 1/2 120-60-1 15 6.1 40 1/2 121
80G2UH090BE12 88,000 70,000 57,000 46,000 80.0 3 1/2 120-60-1 15 6.1 40 1/2 136
80G2UH090BE16
80G2UH090BE16L 88,000 69,000 57,000 46,000 80.0 4 1/2 120-60-1 15 8.2 40 3/4 140
80G2UH110CE16 110,000 86,000 72,000 58,000 80.0 4 1/2 120-60-1 15 8.2 40 3/4 152
80G2UH110CE20
80G2UH110CE20L 110,000 87,000 72,000 58,000 80.0 5 1/2 120-60-1 15 10.0 40 1 156
Note: For vent length and clearances to combustibles, please reference installation instructions.
Note: Filters and provisions for mounting are not furnished and must be field provided.
Major Revision
Revision Code
Nom. CFM x 00
12 = 3 Ton add on cooling
16 = 4 Ton add on cooling
20 = 5 Ton add on cooling
Blower Drive
E = Constant Torque ECM
Cabinet Width
A = 14.5” width
B = 17.5” width
C = 21.0” width
AFUE
80 = 80% Efficency
Gas
Stages
2 = Two Stage
Configuration
UH = Upflow/Horizontal
BTUH Input
Heating Input x 1000
80 G 2 UH 110 C E 16 -01

508187-01Issue 2116Page 8 of 51
80G2UH070AE12 / 80G2UH070AE12L
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 1375 340 1350 240 1110 190 970 93 780 50
0.10 1350 346 1325 254 1100 194 940 104 725 57
0.20 1330 346 1310 264 1080 200 895 113 680 64
0.30 1315 353 1280 272 1060 204 860 118 610 70
0.40 1300 368 1250 283 1040 212 810 125 550 76
0.50 1285 369 1220 293 1010 222 765 132 510 78
0.60 1260 384 1190 301 975 227 725 140 460 83
0.70 1240 391 1150 314 950 236 680 147 400 89
0.80 1210 399 1120 319 915 244 640 152 355 95
80G2UH090BE12
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 1605 313 1475 240 1320 173 1050 99 865 60
0.10 1565 323 1430 251 1270 185 995 108 800 68
0.20 1515 334 1380 264 1225 196 935 115 730 76
0.30 1475 347 1340 275 1170 207 870 124 645 83
0.40 1435 360 1300 285 1120 215 805 133 550 91
0.50 1395 369 1250 295 1065 225 715 140 470 98
0.60 1355 378 1205 307 1010 235 655 147 395 101
0.70 1305 391 1160 318 935 246 560 156 345 107
0.80 1265 404 1105 329 875 254 510 162 300 112
BLOWER PERFORMANCE
80G2UH045AE12
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 1500 300 1220 175 1050 114 850 65 800 48
0.10 1485 311 1200 179 1025 118 810 68 790 50
0.20 1460 323 1170 188 980 125 725 73 580 53
0.30 1420 334 1140 195 930 133 670 76 455 54
0.40 1395 343 1095 203 890 138 600 86 375 60
0.50 1355 355 1050 212 840 149 550 93 325 64
0.60 1325 368 1020 222 790 158 495 96 275 67
0.70 1290 369 980 228 745 164 420 103 238 69
0.80 1260 381 945 238 700 172 380 107 --- ---

508187-01 Issue 2116 Page 9 of 51
80G2UH090BE16 / 80G2UH090BE16L
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 1800 370 1555 260 1425 207 1370 172 1240 131
0.10 1765 381 1525 272 1390 218 1320 184 1190 144
0.20 1725 397 1485 283 1350 229 1255 195 1130 157
0.30 1685 416 1450 296 1310 241 1205 206 1075 165
0.40 1635 425 1390 312 1260 250 1165 217 1015 174
0.50 1600 438 1350 322 1205 263 1100 230 955 185
0.60 1560 453 1300 332 1140 270 1050 239 905 193
0.70 1520 467 1255 344 1110 284 1000 249 840 202
0.80 1470 474 1215 352 1050 294 935 258 765 211
80G2UH110CE16
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 1780 349 1570 248 1465 190 1370 169 1250 131
0.10 1750 365 1540 260 1420 205 1330 177 1205 140
0.20 1720 382 1500 271 1365 220 1280 187 1155 150
0.30 1675 397 1460 279 1330 228 1250 197 1110 159
0.40 1645 407 1415 291 1290 241 1200 211 1070 166
0.50 1605 424 1395 307 1250 249 1165 219 1015 177
0.60 1580 432 1345 316 1205 258 1105 228 960 186
0.70 1565 448 1300 328 1165 271 1060 237 915 194
0.80 1525 449 1270 339 1125 283 1025 246 865 203

508187-01Issue 2116Page 10 of 51
80G2UH110CE20 / 80G2UH110CE20L
External
Static
Pressure
in. w.g.
Air Volume / Watts at Di󰀨erent Blower Speeds
Bottom Return Air, Side Return Air from Both Sides or Return Air from Bottom and One Side.
Single Side Return Air - Air volumes in bold (over 1800 cfm) require Optional Return Air Base and eld fabricated transition to accommodate 20 x 25 x 1 in. air lter in order to maintain proper air velocity.
High
(Black)
Medium-High
(Brown)
Medium
(Blue)
Medium-Low
(Yellow)
Low
(Red)
High
(Black)
Medium-High
(Brown)
Medium
(Blue)
Medium-Low
(Yellow)
Low
(Red)
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 2175 590 2050 410 1850 310 1695 275 1510 195 2175 605 1930 420 1785 320 1675 260 1500 195
0.10 2158 607 1943 421 1778 328 1650 283 1461 205 2129 628 1892 441 1733 345 1627 288 1458 209
0.20 2131 620 1897 436 1719 345 1591 299 1405 215 2091 649 1838 458 1691 360 1586 297 1407 220
0.30 2085 639 1847 456 1678 354 1563 308 1351 228 2072 660 1806 471 1631 371 1529 313 1353 232
0.40 2055 652 1806 466 1641 371 1499 317 1297 238 2014 677 1772 485 1591 385 1485 327 1302 243
0.50 2030 668 1767 476 1588 387 1462 333 1256 254 1977 690 1742 498 1554 395 1444 337 1252 256
0.60 1976 686 1724 495 1550 399 1419 348 1215 265 1960 707 1696 511 511 410 1412 348 1204 265
0.70 1949 700 1685 510 1512 408 1371 357 1168 271 1913 720 1661 525 1480 424 1351 359 1149 274
0.80 1896 716 1649 527 1473 419 1332 372 1121 287 1873 738 1617 538 1440 437 1313 371 1117 285