Lennox Merit CBX25UHV Installation Instructions Manual page 19

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Table 5. Merit CBX25UHV‐030 Air Handler Performance (0 through 0.80 in. w.g. [0 — 200 Pa] External Static Pressure Range)
"ADJUST"
Jumper
Setting
+
NORM
–
NOTES ­
The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
First-stage cooling air volume is 70% of COOL (second-stage) speed setting. Continuous blower speed is approximately 50% of COOL speed setting.
Lennox Harmony III™ Zoning System applications ­ minimum blower speed is 250 cfm.
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Table 6. Merit CBX25UHV‐036 Air Handler Performance (0 through 0.80 in. w.g. [0 — 200 Pa] External Static Pressure Range)
"ADJUST"
Jumper
Setting
+
NORM
–
NOTES ­
The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
First-stage cooling air volume is 70% of COOL (second-stage) speed setting. Continuous blower speed is approximately 50% of COOL speed setting.
Lennox Harmony III™ Zoning System applications ­ minimum blower speed is 250 cfm.
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Table 7. Merit CBX25UHV‐042 Air Handler Performance (0 through 0.80 in. w.g. [0 — 200 Pa] External Static Pressure Range)
"ADJUST"
Jumper
Setting
+
NORM
–
NOTES ­
The effect of static pressure, filter and electric heater resistance is included in the air volumes listed.
First-stage cooling air volume is 70% of COOL (second-stage) speed setting. Continuous blower speed is approximately 50% of COOL speed setting.
Lennox Harmony III™ Zoning System applications ­ minimum blower speed is 450 cfm.
"HEAT" Speed
1 2 3
cfm cfm cfm
650 900 1100 1320
590 795 1000 1200
520 730 895 1075
"HEAT" Speed
1 2 3
cfm cfm cfm
880 1115 1345 1435
800 1010 1215 1425
715 905 1095 1275
"HEAT" Speed
1 2 3
cfm cfm cfm
1115 1345 1560 1800
1025 1215 1415 1630
925 1110 1280 1460
Jumper Speed Positions
First-Stage "COOL" Speed
4 1 2
cfm cfm cfm cfm
430 600 740
390 550 680
340 475 620
Jumper Speed Positions
First-Stage "COOL" Speed
4 1 2
cfm cfm cfm cfm
615 770 930
555 695 845
505 625 755
Jumper Speed Positions
First-Stage "COOL" Speed
4 1 2
cfm cfm cfm cfm
800 960 1120
730 870 1020
650 790 915
Page 19
Second-Stage "COOL" Speed
3 4 1 2
cfm cfm cfm
920 650 875
830 580 800
750 500 700
Second-Stage "COOL" Speed
3 4 1 2
cfm cfm cfm
1090 880 1110
990 795 1005
885 715 905
Second-Stage "COOL" Speed
3 4 1 2
cfm cfm cfm
1265 1130 1360
1150 1040 1240
1050 950 1120
3 4
cfm cfm
1100 1330
1000 1200
900 1090
3 4
cfm cfm
1340 1435
1215 1420
1090 1280
3 4
cfm cfm
1580 1800
1450 1640
1290 1470
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MERIT CBX25UHV SERIES