Page 13
TABLE 10
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
Heating Input Range and Blower Volume − CFM
40%
50%
60%
70%
80%
90%
100%
Increase (+15%) Heat CFM
995
1160
1325
1490
1640
1790
1940
Increase (+7.5%) Heat CFM
930
1075
1225
1370
1520
1670
1825
Default Heat CFM
865
1005
1145
1280
1425
1570
1715
Decrease (–7.5% ) Heat CFM
805
930
1060
1185
1325
1470
1610
Decrease (–15% ) Heat CFM
735
850
970
1090
1215
1345
1470
COOLING BLOWER PERFORMANCE
Cooling Adjust CFM
Selections
Blower Speed Selections
First Stage Cool Speed − cfm
Second Stage Cool Speed − cfm
Low
Medium−
Low
Medium
High
High
(Default)
Low
Medium−
Low
Medium
High
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 III
t
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−60D−135 BLOWER MOTOR WATTS − COOLING
Blower Speed
Options
Motor Watts @ Various External Static Pressures − in. wg.
First Stage
Second Stage
0
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
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
70
90
115
135
165
190
210
230
245
170
200
235
265
305
345
380
420
455
Medium−Low
80
100
130
160
185
210
230
255
275
245
270
305
335
370
410
440
470
505
Medium−High
120
140
170
195
225
255
280
305
330
350
385
420
455
495
530
570
610
645
High
145
175
215
250
280
315
345
375
410
455
500
555
605
645
680
725
770
810
Decrease (–10%) Cool CFM
Low
60
75
95
115
135
150
175
195
220
140
160
185
205
240
280
305
335
360
Medium−Low
60
75
100
125
150
175
195
215
235
145
180
215
250
290
325
355
385
420
Medium−High
90
110
140
165
190
215
235
255
270
230
265
305
345
380
420
450
480
510
High
120
140
170
195
225
255
275
300
325
330
365
405
445
485
525
560
595
635