Bryant 701A - Manual (Page 17)

WARNING: Disconnect and tag electrical power to the
unit before cleaning the blower motor and wheel. Failure
to adhere to this warning could cause personal injury or
death.
To clean the blower motor and wheel:
1. Remove and disassemble blower assembly as follows:
a. Remove unit access panel.
b. Disconnect motor lead from time delay relay (TDR).
Disconnect yellow lead from terminal L2 of the contac-
tor.
c. On all units remove blower assembly from unit. Remove
screws securing blower to blower partition and slide
assembly out. Be careful not to tear insulation in blower
compartment.
d. Ensure proper reassembly by marking blower wheel and
motor in relation to blower housing before disassembly.
e. Loosen setscrew(s) that secures wheel to motor shaft,
remove screws that secure motor mount brackets to
housing, and slide motor and motor mount out of
housing.
2. Remove and clean blower wheel as follows:
a. Ensure proper reassembly by marking wheel orientation.
b. Lift wheel from housing. When handling and/or cleaning
blower wheel, be sure not to disturb balance weights
(clips) on blower wheel vanes.
c. Remove caked-on dirt from wheel and housing with a
brush. Remove lint and/or dirt accumulations from wheel
and housing with vacuum cleaner, using soft brush
attachment. Remove grease and oil with mild solvent.
d. Reassemble wheel into housing.
e. Reassemble motor into housing. Be sure setscrews are
tightened on motor shaft flats and not on round part of
shaft.
f. Reinstall unit access panel.
3. Restore electrical power to unit. Start unit and check for
proper blower rotation and motor speeds during heating and
cooling cycles.
C. CONDENSER COIL, EVAPORATOR COIL, AND CON-
DENSATE DRAIN PAN
Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year.
TABLE 8—WET COIL AIR DELIVERY (DEDUCT 10 PERCENT FOR 208V)*
HORIZONTAL AND DOWNFLOW DISCHARGE
UNIT 701A030-060
230 AND 460 VOLT
Unit
Motor
Speed
External Static Pressure (in. wg)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
030
Low
Watts 280 275 270 267 264 262 260 - - - -
Cfm 880 825 765 693 600 450 281 - - - -
Med
Watts 380 375 365 360 355 350 344 335 312 - -
Cfm 1136 1085 1010 946 865 787 650 495 360 - -
High
Watts 485 475 470 460 455 445 437 430 415 385 -
Cfm 1415 1332 1266 1180 1100 1000 900 780 480 256 -
036
Low
Watts 576 566 556 538 512 497 481 466 450 435 -
Cfm 1385 1297 1220 1165 1090 995 905 846 715 609 -
Med
Watts 680 671 660 624 604 620 602 558 534 512 496
Cfm 1572 1460 1375 1305 1286 1192 1125 1046 891 800 730
High
Watts 810 800 790 782 766 742 723 709 688 661 627
Cfm 1685 1620 1560 1486 1389 1322 1284 1170 1000 897 800
042
Low
Watts - 675 660 650 640 630 620 610 595 580 -
Cfm - 1387 1326 1275 1204 1142 1081 995 918 850 -
Med
Watts - 886 855 825 795 778 765 750 735 718 700
Cfm - 1458 1406 1350 1285 1224 1163 1091 1013 932 870
High
Watts - - - 1000 950 925 910 890 875 855 833
Cfm - - - 1488 1424 1360 1296 1233 1148 1071 1005
048
Low
Watts - 727 712 700 688 666 644 622 595 569 -
Cfm - 1640 1600 1575 1505 1450 1390 1300 1205 1145 -
Med
Watts - 853 836 821 807 782 756 730 699 667 640
Cfm - 1860 1830 1770 1700 1642 1565 1482 1385 1290 1210
High
Watts - 979 959 943 927 897 868 838 802 766 730
Cfm - 2090 2048 1997 1922 1845 1750 1600 1550 1425 1380
060
Low
Watts 1033 949 864 836 822 808 772 737 705 674 642
Cfm 2050 2000 1945 1905 1880 1820 1775 1695 1627 1530 1480
Med
Watts 1084 1054 1024 994 971 955 928 897 867 835 803
Cfm 2248 2179 2110 2058 2000 1932 1885 1829 1740 1638 1569
High
Watts - - 1184 1152 1120 1102 1084 1056 1029 997 965
Cfm - - 2278 2207 2124 2041 2000 1960 1856 1748 1645
* Air delivery values are based on operating voltage of 230v or 460v, wet coil, without filter or electric heater. Deduct filter and electric heater pressure drops to obtain static
pressure available for ducting.
NOTES:
1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below
this point.
2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.
—17—