Blower Motor Performance - Lennox MERIT Series Installation Instructions Manual
Downflow air discharge
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Also See for MERIT Series:
- Installation instructions manual (55 pages) ,
- Care and operation instructions manual (30 pages) ,
- User's information manual (11 pages)
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B LO WER DATA
ML296DF045XV36B BLOWER PERFORMANCE (less filter)
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
"ADJUST"
Switch
Positions
D
+
770
NORM
710
1
—
635
"ADJUST"
Switch
D
Positions
+
700
NORM
645
1
—
590
Factory default jumper setting.
1
NOTES - The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 91% of the same second stage HEAT speed position.
First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position.
Lennox HarmonyIII™ Zoning System Applications - Minimum blower speed is 300 cfm.
B LO WER DATA
ML296DF070XV48B BLOWER PERFORMANCE (less filter)
BOTTOM RETURN AIR
0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range
"ADJUST"
Switch
Positions
D
+
1135
NORM
1025
1
—
930
"ADJUST"
Switch
D
Positions
+
855
NORM
770
1
—
680
Factory default jumper setting.
1
NOTES - The effect of static pressure is included in air volumes shown.
First stage HEAT is approximately 73% of the same second stage HEAT speed position.
First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.
Continuous Fan Only speed is approximately 38% of the same second stage COOL speed position.
Lennox HarmonyIII
Zoning System Applications - Minimum blower speed is 380 cfm.
TM
Second Stage "HEAT" Speed - cfm
C
B
1
860
945
780
860
710
775
First Stage "HEAT" Speed - cfm
C
B
1
760
855
690
775
630
700
Second Stage "HEAT" Speed - cfm
C
B
1
1300
1450
1175
1325
1060
1185
First Stage "HEAT" Speed - cfm
C
B
1
945
1050
810
960
725
820
Speed Switch Positions
Second Stage "COOL" Speed - cfm
A
D
1045
915
960
845
855
750
First Stage "COOL" Speed - cfm
A
D
940
625
855
585
765
545
Speed Switch Positions
Second Stage "COOL" Speed - cfm
A
D
1620
1125
1475
1020
1315
920
First Stage "COOL" Speed - cfm
A
D
1185
770
1085
700
970
615
Page 38
C
B
1100
1200
1010
1110
905
995
C
B
785
860
710
770
660
705
C
B
1360
1580
1220
1435
1110
1290
C
B
970
1105
850
1010
755
875
A
1
1320
1215
1100
A
1
965
870
780
A
1
1805
1650
1500
A
1
1275
1160
1045
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