G71Mpp−60C−090 Blower Performance - Single Side Return Air - Lennox G71MPP SERIES Unit Information

G71MPP−60C−090 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
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−60C−090 BLOWER MOTOR WATTS − COOLING
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 110 130
Medium−Low 125 150
Medium−High 170 195
High 240 275
Default Cool CFM
Low 85 100
Medium−Low 105 125
Medium−High 135 160
High 170 200
Decrease (–10%) Cool CFM
Low 65 80
Medium−Low 75 90
Medium−High 100 120
High 135 160
in order to maintain proper air velocity across the filter.)
0 through 0.80 in. w.g. External Static Pressure Range
40%
655
605
555
515
465
First Stage Cool Speed − cfm
Medium− Medium
Low
Low
1080 1160
985 1060
865 930
Motor Watts @ Various External Static Pressures − in. wg.
First Stage
155 180 205 225 245
175 205 225 250 275
230 260 290 325 355
315 355 380 405 445
125 145 170 200 215
150 170 195 220 240
185 215 240 270 290
235 265 305 340 365
100 120 140 160 180
110 130 155 180 200
150 175 200 220 245
185 215 240 265 290
Page 7
TABLE 4
Heating Input Range and Blower Volume − CFM
50% 60% 70%
790 920 1050
725 850 970
675 790 905
625 730 835
565 665 765
Blower Speed Selections
High
Low
High (Default)
1315 1490 1575
1185 1330 1405
1065 1185 1250
0 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80
270 290 285 320
300 325 355 390
385 415 515 550
485 525 740 785
235 255 200 230
260 280 260 295
315 335 410 440
390 415 550 585
205 225 180 215
220 245 220 250
265 290 320 350
315 335 435 465
80% 90%
1180 1310
1090 1205
1015 1125
940 1045
860 960
Second Stage Cool Speed − cfm
Medium− Medium
Low High
1690 1895
1530 1735
1355 1560
Second Stage
355 390 430 465 500
430 470 500 530 570
590 625 670 710 750
835 885 920 955 990 1020 1050
270 310 340 370 400
330 365 400 440 470
470 500 540 580 610
620 655 695 740 780
245 265 290 320 345
275 305 335 370 400
385 415 445 485 520
495 540 585 610 640
100%
1440
1325
1235
1150
1055
High
(Default)
2135
1935
1735
535 565
605 645
795 840
430 460
500 530
640 670
825 865
375 445
430 510
560 635
665 765