Blower Motor Performance; Heating Blower Performance; Cooling Blower Performance - Lennox G71MPP-36B-070 Installation Instructions Manual

TABLE 21
G71MPP-36B-070 BLOWER PERFORMANCE (less filter)
0 through 0.80 in. w.g. External Static Pressure Range
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
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Heating Input Ran
50% 60%
610 690
575 645
545 610
52o 58o
490 54o
e and Blower Volume - CFM
80%
87O
810
76O
715
655
9O%
975
9O5
845
79O
715
COOLING BLOWER PERFORMANCE
Blower Speed Selections
Cooling Adjust CFM First Stage Cool Speed - cfm Second Stage Cool Speed - cfm
Selections Medium- Medium High I Medium- I Medium I High
Low Low High (Default) Low Low High (Default)
Increase (+10%) Cool CFM 730 815 865 935 1015 1190 1280 1395
Default Cool CFM 880 755 795 855 930 1065 1155 1270
Decrease (-10%) Cool CFM 625 695 730 775 830 950 1010 1105
The effect of static pressure is included in air volumes shown.
Lennox Harmony Ill _ Zone Control Applications - Minimum blower speed is 250 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 Perfomance 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
I Motor Watts @ Various External Static Pressures-in. wg.
Blower Speed First Stage
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Options
0 [ 0.40
Increase (+10%) Cool CFM
Low 55 70 90 110 130 145 160 175 190 135 155 175 200 220 245 270 295 320
Medium-Low 75 90 110 130 150 170 190 205 220 185 215 250 285 315 345 370 395 420
Medium-High 85 100 120 145 165 185 205 225 250 235 265 300 335 370 400 425 455 480
High 105 125 150 170 190 210 235 255 280 315 340 370 395 440 480 510 540 570
Default Cool CFM
Low 45 60 80 95 115 130 145 160 175 100 120 140 165 190 215 235 255 275
Medium-Low 60 75 95 110 130 145 165 180 200 140 165 190 220 245 265 290 315 340
Medium-High 65 85 105 125 140 155 175 195 215 175 200 230 260 285 310 340 365 390
High 85 100 120 140 160 180 200 220 240 230 260 295 325 360 390 410 435 455
Decrease (-10%) Cool CFM
Low 40 55 70 85 100 120 130 145 160 75 90 110 125 150 175 190 210 225
Medium-Low 45 60 80 95 115 135 145 160 175 95 120 150 175 200 220 240 260 285
Medium-High 50 65 85 105 125 145 160 175 190 125 150 175 195 220 240 265 290 320
High 60 75 95 115 135 150 170 190 215 165 190 215 245 265 485 315 340 370
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