Lennox G71MPP SERIES Unit Information

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TABLE 7
G71MPP−60C−110 BLOWER PERFORMANCE (less filter) −− Single Side Return Air
(Air volumes in bold require field fabricated transition to accommodate 20 x 25 x 1 in. cleanable air filter
in order to maintain proper air velocity across the filter.)
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 870 1030 1185 1345 1490 1630 1775
Increase (+7.5%) Heat CFM 815 955 1095 1240 1380 1525 1670
Default Heat CFM 765 900 1035 1170 1305 1435 1570
Decrease (−7.5% ) Heat CFM 715 840 965 1090 1210 1330 1450
Decrease (−15% ) Heat CFM 650 765 880 995 1110 1225 1335
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 935 1025 1155 1285 1585 1700 1905 2135
Default Cool CFM 840 915 1050 1175 1435 1535 1740 1930
Decrease (–10%) Cool CFM 750 800 925 1050 1280 1385 1570 1755
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
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 70 90 110 130 150 165 185 210 230 255 295 345 390 430 470 510 545 585
Medium−Low 85 105 125 150 170 190 215 235 255 340 375 415 455 490 525 570 615 660
Medium−High 115 135 160 185 210 230 255 285 310 455 500 555 610 655 695 750 800 850
High 155 175 195 220 250 285 310 335 360 650 710 770 835 880 920 960 995 1035
Default Cool CFM
Low 60 75 90 110 125 145 165 185 205 195 230 270 305 345 380 415 455 490
Medium−Low 70 85 105 125 140 160 180 200 220 225 265 315 360 400 440 475 515 555
Medium−High 95 110 130 150 175 200 225 245 265 365 400 445 485 525 565 610 650 690
High 115 135 165 190 215 235 260 285 310 495 535 580 625 675 725 770 815 860
Decrease (–10%) Cool CFM
Low 45 60 80 100 110 125 140 155 170 155 180 205 235 270 305 340 370 400
Medium−Low 50 65 85 100 120 135 155 175 195 170 200 240 275 315 355 390 420 455
Medium−High 75 90 105 120 140 160 185 210 235 250 290 330 375 410 445 485 525 570
High 95 110 135 155 175 200 225 250 270 365 405 450 490 535 575 615 655 690

Lennox G71MPP SERIES Specifications

General

Brand	Lennox
Model	G71MPP SERIES
Category	Furnace
Language	English