Lennox G71MPP-36B-070 Installation Instructions Manual page 44

TABLE 25
G71MPP-60C-090 BLOWER PERFORMANCE (less filter) -- Side Return Air with Optional RAB Return Air Base
0 through 0.80 in. w.g. External Static Pressure Range
HEATING BLOWER PERFORMANCE
Heating Adjust CFM Selections
Increase (+15%) Heat CFM
Increase (+7.5%) Heat CFM
Default Heat CFM
Decrease (-7.5%) Heat CFM
Decrease (-15%) Heat CFM
Heating Input Ran
50% 60%
770 895
710 825
660 775
605 710
555 650
e and Blower Volume - CFM
80%
1155
1070
1005
92O
845
90%
1290
1195
1115
1030
945
COOLING BLOWER PERFORMANCE
Blower Speed Selections
Cooling Adjust CFM First Stage Cool Speed - cfm Second Stage Cool Speed - cfm
Selections Medium- Medium High I Medium- I Medium I High
Low Low High (Default) Low Low High (Default)
Increase (+10%) Cool CFM 1060 1135 1285 1455 1525 1655 1860 2100
Default Cool CFM 960 1035 1165 1310 1385 1500 1695 1905
Decrease (-10%) Cool CFM 865 920 1050 1165 1240 1320 1510 1695
The effect of static pressure is included in air volumes shown,
Lennox Harmony Ill _ Zone Control Applications - Minimum blower speed is 450 cfm,
The following control configurations are available. See Installation Instructions for details and DIP switch settings.
Heat Mode (Heating Blower Performance Table):
With a single-stage thermostat, furnace will operate at three, staged rates (40/70/100%) with a time delay between each stage (values in grey-shaded
columns),
With two-stage thermostat there are two modes available,
Traditional two-stage mode - W1 demand results in 70% firing rate. W2 results in 100% firing rate. No delay between stages. (values shown in 70%
and 100% grey-shaded columns only).
Variable Rate Capacity Mode - furnace automatically adjusts firing rate based on first- and second-stage cycle times. (all columns)
Cool Mode (Cooling Blower Perfomance table):
First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.
Continuous Fan speeds are approximately 28%, 38%, 70% and 100% (DIP switch selectable) of the same second-stage COOL speed position
minimum 450 cfm.
G71MPP-60C-090 BLOWER MOTOR WATTS - COOLING
Side Return Air with Optional RAB Return Air Base
I Motor Watts @ Various External Static Pressures-in. wg.
Blower Speed First Stage
/
10.1010.2010.3010.4010.5010.6010.7010.80 0 10.1010.2010.3oOndSa0.5010.6010.7010.80Sectge
Options
0 I 0.40
Increase (+10%) Cool CFM
Low 110 130 150 175 195 215 240 265 290 275 305 340 380 410 440 470 505 540
Medium-Low 130 155 175 200 220 245 265 290 315 360 390 420 455 485 515 550 590 625
Medium-High 160 190 220 255 280 305 335 360 390 490 530 570 610 645 680 715 750 785
High 220 255 295 330 365 400 430 460 490 695 750 805 855 895 935 965 995 1025
Default Cool CFM
Low 80 95 120 140 165 190 210 235 255 190 225 265 305 330 355 390 420 455
Medium-Low 100 120 140 165 190 215 235 255 275 265 295 325 355 390 420 455 495 530
Medium-High 140 160 185 205 235 260 285 305 325 375 410 440 475 500 530 570 610 650
High 180 205 240 270 300 325 350 380 405 520 560 605 645 685 720 760 805 845
Decrease (-10%) Cool CFM
Low 70 85 105 125 140 160 180 200 220 155 175 200 225 255 290 315 340 365
Medium-Low 80 95 115 135 155 175 200 220 245 185 210 235 260 295 325 355 385 415
Medium-High 105 125 150 175 200 220 240 265 290 255 290 330 365 400 430 460 490 520
High 135 160 185 215 235 260 285 305 330 370 400 440 475 505 530 565 600 635
Page 44