Lennox G71MPP-36B-070 Installation Instructions Manual page 43

TABLE 24
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
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
iiiiiiii'ii'ii i!iiiiili! !! !! !i!i ¸!I ¸!I ¸!I ¸!I !i !i !i !i !i !i !i ii i i! i! i! i!ii!iiiiiiiiiii!iiii
i
Heating Input Range and Blower Volume - CFM
50% 60% 80% 90%
790 920 iiiiiiiiiiiiiiiiiiiil;!;i;!;;!_iii_!i_!!!!;!i!!i!!i!!i!i!i!i!i!i!i!i!i 1180 1310
725
850 1090 1205
675 790 iiiiii?!!i! iii,i i !!i!i!!!iiiii!i!ii!iiiilililililililil 1015 1125
625 730 iiiiiiiiiiiiiiiiiiiii__i_!i!__i__i_i_ii_i!i!__!!i!!i!!i!iii__i__i__i__i__i__i__i__i__i__i__ 940 1045
565 665 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_______!!!!_!!_!!_!!_!!_!!_!!_!!_!!_!!_!!_!!_!!_!!_!!_!!_!__! 860 960
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 1080 1160 1315 1490 1575 1690 1895 2135
Default Cool CFM 985 1060 1185 1330 1405 1530 1735 1935
Decrease (-10%) Cool CFM 865 930 1065 1185 1250 1355 1560 1735
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-60C-090 BLOWER MOTOR WATTS - COOLING
Motor Watts @ Various External Static Pressures - in. wg.
Blower Speed First Stage
Options 0 10.1010.2010.3010.4010.5010.6010.7010.800 {0.1010.2010.SoC°ndSlag_o{0.6010.7010.8010.40
Increase (+10%) Cool CFM
Low
Medium-Low
Medium-High
High
Default Cool CFM
Low
Medium-Low
Medium-High
High
Decrease (-10%) Cool CFM
Low
Medium-Low
Medium-High
High
565
645
84O
105
0
46O
53O
67O
865
445
510
635
765
Page 43