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TABLE 2
G71MPP−36C−090 BLOWER PERFORMANCE
(less 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
650
740
825
910
1005
1100
1200
Increase (+7.5%) Heat CFM
620
695
775
850
940
1025
1115
Default Heat CFM
590
655
725
790
870
950
1030
Decrease (–7.5% ) Heat CFM
555
615
680
740
815
890
965
Decrease (–15% ) Heat CFM
525
575
630
680
745
805
870
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
705
790
845
920
1020
1185
1275
1395
Default Cool CFM
650
730
770
830
905
1060
1145
1270
Decrease (–10%) Cool CFM
600
670
705
750
800
925
1010
1100
The effect of static pressure is included in air volumes shown.
Lennox Harmony III
t
Zone Control Applications − Minimum blower speed is 250 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 250 cfm.
G71MPP−36C−090 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
35
50
70
90
105
125
140
160
175
85
110
135
160
185
205
235
265
295
Medium−Low
45
60
80
100
125
150
170
185
205
125
155
185
220
245
275
305
330
360
Medium−High
60
75
95
110
135
160
180
200
220
165
195
230
265
300
330
355
380
410
High
65
85
110
135
160
180
205
225
245
210
245
285
325
360
390
425
460
495
Default Cool CFM
Low
35
45
60
75
95
115
130
145
160
60
80
110
135
155
175
195
215
235
Medium−Low
40
55
70
90
110
130
150
165
185
105
125
145
170
200
225
250
270
295
Medium−High
45
60
80
95
115
135
155
175
195
115
140
175
205
235
265
290
315
335
High
50
65
85
105
130
155
180
200
220
155
185
220
255
285
315
345
380
415
Decrease (–10%) Cool CFM
Low
30
40
55
75
90
105
120
135
150
55
65
85
105
125
150
170
190
210
Medium−Low
40
50
65
80
100
120
130
145
160
65
90
120
145
165
185
205
225
250
Medium−High
40
55
70
90
105
125
140
160
180
85
105
135
165
185
210
235
260
285
High
45
60
75
90
115
135
155
170
190
105
125
150
175
210
240
275
305
335
