Lennox G71MPP SERIES Unit Information

Page 13
TABLE 10
G71MPP−60D−135 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 995 1160 1325 1490 1640 1790 1940
Increase (+7.5%) Heat CFM 930 1075 1225 1370 1520 1670 1825
Default Heat CFM 865 1005 1145 1280 1425 1570 1715
Decrease (–7.5% ) Heat CFM 805 930 1060 1185 1325 1470 1610
Decrease (–15% ) Heat CFM 735 850 970 1090 1215 1345 1470
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 1105 1180 1330 1500 1585 1705 1905 2130
Default Cool CFM 990 1075 1210 1355 1430 1545 1765 1975
Decrease (–10%) Cool CFM 890 950 1085 1210 1275 1370 1565 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−60D−135 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 90 110 140 170 195 220 240 265 290 230 265 310 355 390 425 460 490 525
Medium−Low 105 130 165 195 215 235 260 290 315 285 330 380 430 455 485 525 565 605
Medium−High 150 175 205 235 270 300 330 360 385 425 465 515 560 605 645 685 730 770
High 195 230 270 305 340 375 410 445 480 605 650 695 740 800 855 900 945 985
Default Cool CFM
Low 70 90 115 135 165 190 210 230 245 170 200 235 265 305 345 380 420 455
Medium−Low 80 100 130 160 185 210 230 255 275 245 270 305 335 370 410 440 470 505
Medium−High 120 140 170 195 225 255 280 305 330 350 385 420 455 495 530 570 610 645
High 145 175 215 250 280 315 345 375 410 455 500 555 605 645 680 725 770 810
Decrease (–10%) Cool CFM
Low 60 75 95 115 135 150 175 195 220 140 160 185 205 240 280 305 335 360
Medium−Low 60 75 100 125 150 175 195 215 235 145 180 215 250 290 325 355 385 420
Medium−High 90 110 140 165 190 215 235 255 270 230 265 305 345 380 420 450 480 510
High 120 140 170 195 225 255 275 300 325 330 365 405 445 485 525 560 595 635

Lennox G71MPP SERIES Specifications

General

Brand	Lennox
Model	G71MPP SERIES
Category	Furnace
Language	English