LGA/LCA/LHA - lennox

BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT WITH STANDARD GAS HEAT, WET INDOOR COIL & AIR FILTERS IN PLACE.
FOR ALL UNITS ADD:
1 − Any factory installed options air resistance (high gas heat, economizer, etc.). See table below
2 − Any field installed accessories air resistance (duct resistance, diffuser, etc.). See Page 29
Then determine from table the blower motor output and drive required.
0.30 to 1.40 in. w.g. LGA180
Air
Volume
cfm 0.30 0.40 0.50 0.60 0.70
External Static (in. w.g.)
0.80 0.90 1.00 1.10 1.20 1.30 1.40
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
Low Static − 2 HP, Drive Kit A Standard Static − 3 HP, Drive Kit 1
4800 577 1.13 620 1.31 662 1.48 702 1.66 742 1.83 777 2.01 811 2.18 842 2.36 872 2.54 902 2.72 932 2.89 960 3.07
5000 585 1.25 628 1.43 670 1.60 710 1.78 750 1.95 783 2.13 815 2.30 848 2.50 880 2.70 910 2.88 940 3.05 968 3.23
5500 605 1.45 648 1.65 690 1.85 728 2.05 765 2.25 800 2.45 835 2.65 865 2.85 895 3.05 925 3.25 955 3.45 983 3.65
6000 630 1.75 670 1.95 710 2.15 748 2.38 785 2.60 818 2.83 850 3.05 880 3.25 910 3.45 940 3.68 970 3.90 998 4.13
6500 650 2.05 690 2.28 730 2.50 768 2.75 805 3.00 838 3.23 870 3.45 900 3.70 930 3.95 958 4.18 985 4.40 1013 4.63
7000 675 2.35 715 2.63 755 2.90 790 3.15 825 3.40 858 3.68 890 3.95 920 4.20 950 4.45 978 4.70 1005 4.95 1030 5.18
7200 687 2.55 725 2.81 763 3.06 798 3.33 833 3.60 866 3.86 898 4.11 926 4.36 954 4.61 984 4.90 1013 5.19 1038 5.44
1.50 to 2.50 in. w.g. LGA180
Air
Volume
cfm 1.50 1.60 1.70 1.80
External Static (in. w.g.)
1.90 2.00 2.10 2.20 2.30 2.40 2.50
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
High Static − 5 HP, Drive Kit 4 Field Furnished Drive
4800 987 3.24 1014 3.42 1041 3.60 1064 3.78 1087 3.95 1112 4.13 1136 4.30 1159 4.50 1181 4.70 1204 4.88 1226 5.06
5000 995 3.40 1020 3.60 1045 3.80 1070 3.98 1095 4.15 1118 4.33 1140 4.50 1163 4.70 1185 4.90 1208 5.10 1230 5.30
5500 1010 3.85 1035 4.05 1060 4.25 1085 4.48 1110 4.70 1133 4.90 1155 5.10 1178 5.30 1200 5.50 1220 5.70 1240 5.90
6000 1025 4.35 1050 4.58 1075 4.80 1098 5.00 1120 5.20 1145 5.43 1170 5.65 1193 5.88 1215 6.10 1235 6.33 1255 6.55
6500 1040 4.85 1065 5.10 1090 5.35 1115 5.60 1140 5.85 1163 6.08 1185 6.30 1205 6.53 1225 6.75 1248 7.00 1270 7.25
7000 1055 5.40 1080 5.68 1105 5.95 1130 6.20 1155 6.45 1178 6.70 1200 6.95 1220 7.20 1240 7.45 1263 7.73 1285 8.00
7200 1063 5.68 1088 5.94 1113 6.19 1136 6.44 1159 6.69 1182 6.96 1204 7.23 1226 7.50 1248 7.77 1269 8.03 1289 8.28
NOTE − Bold, italics − drive is capable of the values noted but will exceed motor horsepower.
AIR RESISTANCE (in. w.g.) − Factory Installed Options
Air Air Volume − cfm
Gas Heat Exchanger
Med. Heat High Heat
Page 22
Economizer
Horizontal
MERV 11
Roof Curb
Filter
4800 .08 .10 − − − .08 .01
5000 .09 .11 − − − .08 .01
5500 .10 .13 − − − .10 .02
6000 .12 .15 − − − .11 .02
6500 .13 .17 .02 .13 .02
7000 .15 .19 .04 .15 .03
7200 .16 .20 .05 .16 .03