Lennox G71MPP-36B-070 Installation Instructions Manual page 49

TABLE 30
G71MPP-60D-135 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
in order to maintain proper air velocity across the 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
Heating Input Range and Blower Volume - CFM
50%
1160
1075
1005
93O
85O
60%
1325
1225
1145
1060
970
80%
1640
1520
1425
1325
1215
90%
1790
1670
1570
1470
1345
COOLING BLOWER PERFORMANCE
Blower Speed Selections
Cooling Adjust CFM First Stage Cool Speed - cfm Second Stage Cool Speed - cfm
Selections Medium- Medium High Medium- Medium High
Low Low High (Default) Low Low High (Default)
Increase (+10%) Cool CFM 1105 1180 1330 1500 1585 1705 1905 2130
Default Cool CFM 990 1075 1210 1355 1430 1545 1765 1975
Decrease (-10%) Cool CFM 890 950 1085 1210 1275 1370 1565 1755
The effect of static pressure is included in air volumes shown,
Lennox Harmony Ill " Zone Control Applications - Minimum blower speed is 450 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 450 cfm.
G71MPP-60D-135 BLOWER MOTOR WATTS - COOLING
Motor Watts @ Various External Static Pressures - in. wg.
Blower Speed First Stage
10.1010.2010.3010.4010.5010.6010.7010.80 0 10.1010.2010.3oOndS/a0.5010.6010.7010.80Sectge
Options
0 I 0.40
Increase (+10%) Cool CFM
Low 90 110 140 170 195 220 240 265 290 230 265 310 355 390 425 460 490 525
Medium-Low 105 130 165 195 215 235 260 290 315 285 330 380 430 455 485 525 565 605
Medium-High 150 175 205 235 270 300 330 360 385 425 465 515 560 605 645 685 730 770
High 195 230 270 305 340 375 410 445 480 605 650 695 740 800 855 900 945 985
Default Cool CFM
Low
Medium-Low
Medium-High
High
Decrease (-10%) Cool CFM
Low
Medium-Low
Medium-High
High
455
5O5
645
810
36O
42O
510
635
Page 49