G71Mpp−60D−135 Blower Performance (Less Filter) - Lennox G71MPP SERIES Unit Information

Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side
HEATING BLOWER PERFORMANCE
Heating Adjust CFM Selections
Increase (+15%) Heat CFM
Increase (+7.5%) Heat CFM
Default Heat CFM
Decrease (–7.5% ) Heat CFM
Decrease (–15% ) Heat CFM
COOLING BLOWER PERFORMANCE
Cooling Adjust CFM
Selections
Increase (+10%) Cool CFM
Default Cool CFM
Decrease (–10%) Cool CFM
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
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side
Blower Speed
Options
0 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80
Increase (+10%) Cool CFM
Low 95 120
Medium−Low 115 135
Medium−High 145 175
High 205 240
Default Cool CFM
Low 80 95
Medium−Low 90 115
Medium−High 130 150
High 150 180
Decrease (–10%) Cool CFM
Low 65 80
Medium−Low 70 90
Medium−High 95 120
High 135 155
G71MPP−60D−135 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range
40%
1045
975
900
840
760
First Stage Cool Speed − cfm
Medium− Medium
Low
Low
1135 1205
1025 1105
915 985
Motor Watts @ Various External Static Pressures − in. wg.
First Stage
145 170 190 215 240
160 185 210 235 260
215 250 275 300 330
280 320 350 380 410
115 135 160 190 210
140 165 190 215 230
170 195 225 255 275
220 255 285 315 345
100 120 140 160 180
110 130 155 175 200
145 170 190 215 235
175 200 220 245 270
TABLE 9
Heating Input Range and Blower Volume − CFM
50% 60% 70%
1220 1390 1565
1130 1290 1450
1045 1195 1340
975 1110 1250
890 1020 1145
Blower Speed Selections
High
Low
High (Default)
1365 1540 1615
1235 1390 1455
1115 1235 1305
0 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80
265 290 250 285
290 315 290 330
355 385 425 465
445 480 615 655
230 255 185 215
250 265 230 260
300 320 315 355
375 405 445 485
195 215 145 170
220 240 160 190
250 270 245 280
300 325 325 365
Page 12
80% 90%
1725 1885
1600 1750
1495 1650
1390 1535
1275 1405
Second Stage Cool Speed − cfm
Medium− Medium
Low High
1730 1945
1580 1780
1400 1600
Second Stage
320 360 390 420 450
375 420 455 490 525
505 550 590 635 670
700 745 800 855 900
245 280 310 335 370
295 335 370 405 435
400 445 480 515 555
530 580 625 670 705
195 225 250 280 305
225 255 285 315 345
315 355 385 415 445
405 445 485 520 550
100%
2045
1900
1805
1675
1535
High
(Default)
2190
1985
1780
485 515
565 605
710 750
940 980
400 430
470 500
590 625
740 775
330 355
380 415
480 515
580 610