Page 9
TABLE 6
G71MPP−60C−110 BLOWER PERFORMANCE
(less filter)
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side
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
890
1050
1215
1375
1535
1695
1855
Increase (+7.5%) Heat CFM
845
975
1125
1275
1430
1585
1740
Default Heat CFM
800
960
1075
1190
1335
1480
1625
Decrease (–7.5% ) Heat CFM
735
860
990
1120
1250
1380
1510
Decrease (–15% ) Heat CFM
670
790
910
1030
1145
1260
1375
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
945
1020
1160
1300
1625
1745
1990
2210
Default Cool CFM
840
910
1055
1180
1465
1580
1790
1995
Decrease (–10%) Cool CFM
740
800
920
1045
1290
1405
1605
1790
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−60C−110 BLOWER MOTOR WATTS − COOLING
Bottom Return Air, Return Air from Both Sides or Return Air from Bottom and One Side
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
75
90
115
135
160
180
200
220
240
280
315
350
390
430
475
510
550
585
Medium−Low
90
105
130
150
175
200
220
245
270
340
380
425
465
505
545
575
610
645
Medium−High
120
140
170
195
225
250
275
300
330
510
545
585
620
675
735
770
805
840
High
160
185
210
235
265
290
325
360
395
710
755
805
855
905
950
980
1010 1035
Default Cool CFM
Low
55
70
90
110
135
155
175
195
215
205
235
275
310
345
380
415
450
485
Medium−Low
75
90
105
125
150
170
190
215
235
250
285
325
360
400
440
470
505
540
Medium−High
95
115
135
160
190
220
240
265
285
375
410
445
485
530
575
605
635
670
High
125
150
175
200
225
255
280
305
335
510
550
595
640
685
725
770
815
860
Decrease (–10%) Cool CFM
Low
45
60
80
100
115
125
145
160
180
155
180
210
240
270
295
325
355
385
Medium−Low
55
70
85
105
125
150
165
185
200
185
215
245
280
315
345
380
415
450
Medium−High
70
85
105
125
150
170
195
215
235
265
300
345
385
425
465
500
535
570
High
95
110
135
160
190
220
240
260
280
375
415
455
495
535
575
615
650
690