TABLE 12
AIR FLOW PERFORMANCE – (-)801S/(-)801P & (-)(-)80MSS/(-)(-)80MSP SERIES MODELS
Motor HP
Model
Blower Size,
IN.
(-)801SA050314MSA
1/3
(-)801PA050314MSA
(-)(-)80MSS050A30SA
11 x 6
(-)(-)80MSP050A30SA
(-)801SA075417MSA
1/2
(-)801PA075417MSA
(-)(-)80MSS075B30SA
11 x 7
(-)(-)80MSP075B30SA
(-)801SA100521MSA
1/2
(-)801PA100521MSA
(-)(-)80MSS100C40SA
11 x 10
(-)(-)80MSP100C40SA
(-)801SA125524MSA
3/4
(-)801PA125524MSA
(-)(-)80MSS125D50SA
11 x 10
(-)(-)80MSP125D50SA
(-)801SA150524MSA
3/4
(-)801SA150524MSA
(-)(-)80MSS150D50SA
11 x 10
(-)(-)80MSP150D50SA
NOTE: Shaded data is factory heating tap.
BLOWER SPEED SELECTIONS
The UT Electronic Controls control boards have four quick con-
nect terminals for connecting the motor speed leads. These are:
1. FAN SPEED* — motor runs on this speed when the thermo-
stat is in the "FAN" position.
2. COOL — connect desired cooling speed.
3. HEAT — connect desired heating speed.
4. HEAT/COOL* — connect desired speed when heating and
cooling speed are the same.
CAUTION
DO NOT CONNECT ANY MOTOR SPEEDS TO "HEAT" OR
"COOL" IF YOU USE THE "HEAT/COOL" TERMINAL. DOING
SO WILL DAMAGE THE BLOWER MOTOR. UNUSED
MOTOR WIRE TAPS MUST BE CONNECTED TO PARKING
TERMINALS M1 AND M2 OF THE IFC, OR PROPERLY IN-
SULATED.
5. If heating and continuous speed are the same, jump across
"FAN" and "HEAT" terminals.
See Table 10 for instructions for setting the blower "OFF" timings.
46
Speed Tap
0.1
0.2
Low
823
803
Med. Lo
1030
1018
Med. Hi
1129
1132
High
1361
1353
Low
1229
1200
Med. Lo
1308
1267
Med. Hi
1553
1542
High
1969
1924
Low
1209
1182
Med. Lo
1438
1420
Med. Hi
1902
1883
High
2071
2037
Low
1358
1354
Med. Lo
1541
1517
Med. Hi
1799
1774
High
2015
1989
Low
1411
1395
Med. Lo
1606
1579
Med. Hi
1889
1891
High
2178
2160
CFM Air Delivery
External Static Pressure, " W.C.
0.3
0.4
0.5
787
732
718
1006
976
929
1112
1087
1054
1331
1297
1264
1181
1155
1120
1266
1233
1204
1516
1491
1451
1893
1840
1803
1131
1112
1051
1386
1350
1320
1844
1817
1753
2001
1962
1905
1331
13091
1250
1476
1453
1416
1746
1712
1691
1929
1902
1862
1370
1334
1310
1569
1537
1499
1849
1828
1764
2105
2067
2024
GAS FURNACE (DIRECT DRIVE)
INSTRUCTIONS FOR CHANGING
BLOWER SPEED
DISCONNECT THE ELECTRICAL SUPPLY TO THE FUR-
NACE BEFORE ATTEMPTING TO CHANGE THE BLOWER
SPEED. FAILURE TO DO SO CAN CAUSE ELECTRICAL
SHOCK RESULTING IN SEVERE PERSONAL INJURY OR
DEATH.
The blower motor is wired for blower speeds required for normal
operation as shown.
If additional blower speed taps are available (leads connected to
"M1" and "M2" on the electronic control), speeds may be changed
if necessary to fit requirements of the particular installation. Re-
connect the unused motor leads to "M1" or "M2." Check motor
lead color for speed designation.
Heating speeds should not be reduced where it could cause the
furnace air temperature to rise to exceed the maximum outlet air
temperature specified for the unit.
0.6
0.7
0.8
691
651
593
897
850
808
1028
971
919
1232
1164
1117
1078
1013
970
1176
1113
1062
1417
1358
1306
1728
1657
1570
976
929
867
1293
1248
1186
1700
1636
1547
1856
1807
1709
1224
1154
1089
1371
1339
1277
1629
1554
1495
1815
1742
1665
1252
1220
1150
1468
1407
1346
1717
1659
1609
1976
1916
1832
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