Lennox G71MPP SERIES Unit Information

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TABLE 6
G71MPP−60C−110 BLOWER PERFORMANCE (less filter)
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side
0 through 0.80 in. w.g. External Static Pressure Range
HEATING BLOWER PERFORMANCE
Heating Adjust CFM Selections
Heating Input Range and Blower Volume − CFM
40% 50% 60% 70% 80% 90% 100%
Increase (+15%) Heat CFM 890 1050 1215 1375 1535 1695 1855
Increase (+7.5%) Heat CFM 845 975 1125 1275 1430 1585 1740
Default Heat CFM 800 960 1075 1190 1335 1480 1625
Decrease (–7.5% ) Heat CFM 735 860 990 1120 1250 1380 1510
Decrease (–15% ) Heat CFM 670 790 910 1030 1145 1260 1375
COOLING BLOWER PERFORMANCE
Cooling Adjust CFM
Selections
Blower Speed Selections
First Stage Cool Speed − cfm Second Stage Cool Speed − cfm
Low
Medium−
Low
Medium
High
High
(Default)
Low
Medium−
Low
Medium
High
High
(Default)
Increase (+10%) Cool CFM 945 1020 1160 1300 1625 1745 1990 2210
Default Cool CFM 840 910 1055 1180 1465 1580 1790 1995
Decrease (–10%) Cool CFM 740 800 920 1045 1290 1405 1605 1790
The effect of static pressure is included in air volumes shown.
Lennox Harmony IIIt Zone Control Applications − Minimum blower speed is 450 cfm.
The following control board 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 Performance 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−110 BLOWER MOTOR WATTS − COOLING
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side
Blower Speed
Options
Motor Watts @ Various External Static Pressures − in. wg.
First Stage Second Stage
0 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80
Increase (+10%) Cool CFM
Low 75 90 115 135 160 180 200 220 240 280 315 350 390 430 475 510 550 585
Medium−Low 90 105 130 150 175 200 220 245 270 340 380 425 465 505 545 575 610 645
Medium−High 120 140 170 195 225 250 275 300 330 510 545 585 620 675 735 770 805 840
High 160 185 210 235 265 290 325 360 395 710 755 805 855 905 950 980 1010 1035
Default Cool CFM
Low 55 70 90 110 135 155 175 195 215 205 235 275 310 345 380 415 450 485
Medium−Low 75 90 105 125 150 170 190 215 235 250 285 325 360 400 440 470 505 540
Medium−High 95 115 135 160 190 220 240 265 285 375 410 445 485 530 575 605 635 670
High 125 150 175 200 225 255 280 305 335 510 550 595 640 685 725 770 815 860
Decrease (–10%) Cool CFM
Low 45 60 80 100 115 125 145 160 180 155 180 210 240 270 295 325 355 385
Medium−Low 55 70 85 105 125 150 165 185 200 185 215 245 280 315 345 380 415 450
Medium−High 70 85 105 125 150 170 195 215 235 265 300 345 385 425 465 500 535 570
High 95 110 135 160 190 220 240 260 280 375 415 455 495 535 575 615 650 690

Lennox G71MPP SERIES Specifications

General

Brand	Lennox
Model	G71MPP SERIES
Category	Furnace
Language	English