Lennox G71MPP User Manual

Page 53
TABLE 31
G71MPP−60D−135 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
Heating Input Range and Blower Volume − CFM
40% 50% 60% 70% 80% 90% 100%
Increase (+15%) Heat CFM 1020 1180 1340 1500 1650 1800 1955
Increase (+7.5%) Heat CFM 950 1095 1245 1395 1535 1680 1825
Default Heat CFM 885 1020 1160 1300 1435 1575 1715
Decrease (–7.5% ) Heat CFM 820 945 1075 1200 1335 1475 1610
Decrease (–15% ) Heat CFM 745 870 990 1110 1230 1350 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 1080 1155 1310 1480 1550 1660 1875 2105
Default Cool CFM 985 1055 1190 1325 1400 1510 1720 1920
Decrease (–10%) Cool CFM 875 945 1060 1190 1250 1345 1530 1715
The effect of static pressure is included in air volumes shown.
Lennox Harmony III Zone Control Applications − Minimum blower speed is 475 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 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 − Side Return Air with Optional RAB Return Air Base
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 90 110 140 165 190 210 235 260 285 235 265 305 340 380 415 450 480 515
Medium−Low 105 130 160 190 210 230 255 285 310 290 325 370 410 450 490 515 545 575
Medium−High 145 170 205 235 265 290 325 355 390 420 460 510 555 595 640 680 715 755
High 200 230 270 305 345 385 415 445 480 580 630 690 745 800 850 895 935 975
Default Cool CFM
Low 70 90 115 140 165 190 210 230 250 170 200 235 270 305 335 370 400 430
Medium−Low 90 105 125 150 175 200 225 250 270 200 230 270 310 355 400 435 465 495
Medium−High 115 140 170 195 225 250 275 300 325 330 365 400 440 485 525 555 585 615
High 145 175 205 240 270 295 330 365 395 435 480 530 580 625 675 715 750 790
Decrease (–10%) Cool CFM
Low 60 75 95 115 135 155 175 195 215 135 155 180 205 240 280 305 330 355
Medium−Low 70 90 110 130 150 170 195 215 235 160 185 215 240 275 310 345 375 410
Medium−High 85 105 130 155 180 205 230 250 270 220 255 295 335 370 410 440 475 510
High 120 140 170 195 220 240 270 295 325 330 365 400 440 480 525 555 585 615

Lennox G71MPP Specifications

General

Brand	Lennox
Model	G71MPP
Category	Furnace
Language	English