G71Mpp−36B−070 Blower Performance (Less Filter); Blower Data - Lennox G71MPP SERIES Unit Information

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 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−36B−070 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 55 70
Medium−Low 75 90
Medium−High 85 100
High 105 125
Default Cool CFM
Low 45 60
Medium−Low 60 75
Medium−High 65 85
High 85 100
Decrease (–10%) Cool CFM
Low 40 55
Medium−Low 45 60
Medium−High 50 65
High 60 75
G71MPP−36B−070 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range
40%
535
505
480
460
440
First Stage Cool Speed − cfm
Medium− Medium
Low
Low
730 815
680 755
625 695
Motor Watts @ Various External Static Pressures − in. wg.
First Stage
90 110 130 145 160
110 130 150 170 190
120 145 165 185 205
150 170 190 210 235
80 95 115 130 145
95 110 130 145 165
105 125 140 155 175
120 140 160 180 200
70 85 100 120 130
80 95 115 135 145
85 105 125 145 160
95 115 135 150 170
TABLE 1
Heating Input Range and Blower Volume − CFM
50% 60% 70%
610 690 770
575 645 720
545 610 675
520 580 640
490 540 590
Blower Speed Selections
High
Low
High (Default)
865 935 1015
795 855 930
730 775 830
0 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80
175 190 135 155
205 220 185 215
225 250 235 265
255 280 315 340
160 175 100 120
180 200 140 165
195 215 175 200
220 240 230 260
145 160 75 90
160 175 95 120
175 190 125 150
190 215 165 190
Page 4
80% 90%
870 975
810 905
760 845
715 790
655 715
Second Stage Cool Speed − cfm
Medium− Medium
Low High
1190 1280
1065 1155
950 1010
Second Stage
175 200 220 245 270
250 285 315 345 370
300 335 370 400 425
370 395 440 480 510
140 165 190 215 235
190 220 245 265 290
230 260 285 310 340
295 325 360 390 410
110 125 150 175 190
150 175 200 220 240
175 195 220 240 265
215 245 265 485 315
100%
1075
1000
930
870
780
High
(Default)
1395
1270
1105
295 320
395 420
455 480
540 570
255 275
315 340
365 390
435 455
210 225
260 285
290 320
340 370