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Heating Speed Set-ups
OH6FA072DV4
Furnace Motor Current
Draw (Amps/ / Watts) vs.
External Static Pressure (in W.C.)
Low Fire Med Fire High Fire
BTUH 60,000 72,000 90,000
Fan
Control
SW 1
Switch
Settings
Heating
CFM
Aprox. Rise
(F
0
)
Aprox. Rise
(F
0
)
Aprox. Rise
(F
0
) 0.2 0.4 0.6
3-OFF
2-OFF
1-OFF
740
75
o
0.9/75 1.4/123 1.7/156
3-OFF
2-OFF
1-ON
812
68
o
82
o
1.0/86 1.5/136 1.9/172
3-OFF
2-ON
1-OFF
883
63
o
76
o
1.1/95 1.6/143 2.2/199
Factory
SW1
Switch
Settings
3-OFF
2-ON
1-ON
968
57
o
69
o
86
o
1.2/110 1.8/165 2.5/233
3-ON
2-OFF
1-OFF
1054
63
o
79
o
1.4/128 2.0/183 2.6/244
3-ON
2-OFF
1-ON
1153
58
o
72
o
1.7/153 2.4/221 2.9/267
3-ON
2-ON
1-OFF
1267
66
o
2.1/192 2.7/252 3.2/310
3-ON
2-ON
1-ON
1424
58
o
2.8/263 3.4/325 4.1/394
= Recommended Heating Speed Setting
Figure 18-1: ECM blower motor speed chart