Lennox G71MPP Unit Information

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TABLE 2
G71MPP−36C−090 BLOWER PERFORMANCE (less 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 650 740 825 910 1005 1100 1200
Increase (+7.5%) Heat CFM 620 695 775 850 940 1025 1115
Default Heat CFM 590 655 725 790 870 950 1030
Decrease (–7.5% ) Heat CFM 555 615 680 740 815 890 965
Decrease (–15% ) Heat CFM 525 575 630 680 745 805 870
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 705 790 845 920 1020 1185 1275 1395
Default Cool CFM 650 730 770 830 905 1060 1145 1270
Decrease (–10%) Cool CFM 600 670 705 750 800 925 1010 1100
The effect of static pressure is included in air volumes shown.
Lennox Harmony IIIt Zone Control Applications − Minimum blower speed is 250 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 250 cfm.
G71MPP−36C−090 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 35 50 70 90 105 125 140 160 175 85 110 135 160 185 205 235 265 295
Medium−Low 45 60 80 100 125 150 170 185 205 125 155 185 220 245 275 305 330 360
Medium−High 60 75 95 110 135 160 180 200 220 165 195 230 265 300 330 355 380 410
High 65 85 110 135 160 180 205 225 245 210 245 285 325 360 390 425 460 495
Default Cool CFM
Low 35 45 60 75 95 115 130 145 160 60 80 110 135 155 175 195 215 235
Medium−Low 40 55 70 90 110 130 150 165 185 105 125 145 170 200 225 250 270 295
Medium−High 45 60 80 95 115 135 155 175 195 115 140 175 205 235 265 290 315 335
High 50 65 85 105 130 155 180 200 220 155 185 220 255 285 315 345 380 415
Decrease (–10%) Cool CFM
Low 30 40 55 75 90 105 120 135 150 55 65 85 105 125 150 170 190 210
Medium−Low 40 50 65 80 100 120 130 145 160 65 90 120 145 165 185 205 225 250
Medium−High 40 55 70 90 105 125 140 160 180 85 105 135 165 185 210 235 260 285
High 45 60 75 90 115 135 155 170 190 105 125 150 175 210 240 275 305 335

Lennox G71MPP Specifications

General

Brand	Lennox
Model	G71MPP
Category	Furnace
Language	English