19
BLOWER PERFORMANCE SPECIFICATIONS
1. Units are shipped without filter(s). CFM in chart is without filter(s).
2. All furnaces shipped with heating speed set at "B" and cooling speed set at "D". Installer should adjust blower speed as
needed. The first task is to determine the proper aiflow for the cooling system.
3. For most cooling applications, about 400 CFM per ton is desirable.
4. The chart is for information only. For satisfactory operation, external static pressure not to exceed value shown on rating
plate.
5. Do not operate above 0.5" w.c. ESP in heating mode. Operating between 0.5" w.c. and 0.8" w.c. is tabulated for cooling
purposes only.
6. * Motor CFM minimum.
GCV9 Heating Speed Charts
Heating
Speed
Tap
Adjust
Tap
Low Stage
CFM
at .1" - .5" w.c.
ESP
High Stage
CFM
at .1" - .5" w.c.
ESP
Rise
(°F)
Minus(-) 1093 1583 63
Normal 1214 1759 56
Plus (+) 1335 1935 51
Minus(-) 1106 1612 61
Normal 1229 1791 55
Plus
+
1352 1970 50
Minus
-
1166 1654 60
Normal 1296 1838 54
Plus
+
1426 2022 49
Minus(-) 1172 1690 59
Normal 1302 1878 53
Plus (+) 1432 2066 48
D
GCV91155DX*
(Rise Range: 30 - 60°F)
A
B
C
Heating
Speed
Tap
Adjust
Tap
Low Stage
CFM
at .1" - .5" w.c.
ESP
High Stage
CFM
at .1" - .5" w.c.
ESP
Rise
(°F)
Heating
Speed
Tap
Adjust
Tap
Low Stage
CFM
at .1" - .5" w.c.
ESP
High Stage
CFM
at .1" - .5" w.c.
ESP
Rise
(°F)
Minus(-) 747 1076 56 Minus(-) 999 1439 56
Normal 830 1195 50 Normal 1110 1598 50
Plus (+) 913 1315 46 Plus (+) 1221 1758 46
Minus(-) 824 1186 51 Minus(-) 1067 1536 52
Normal 915 1318 46 Normal 1185 1706 47
Plus (+) 1007 1449 42 Plus (+) 1303 1876 43
Minus(-) 900 1296 47 Minus(-) 1134 1633 49
Normal 1000 1440 42 Normal 1260 1814 44
Plus (+) 1100 1584 38 Plus (+) 1386 1996 40
Minus(-) 978 1408 43 Minus(-) 1202 1730 46
Normal 1085 1562 39 Normal 1335 1922 42
Plus (+) 1194 1719 35 Plus (+) 1469 2115 38
D
GCV90905DX*
(Rise Range: 30 - 60°F)
A
B
CC
D
GCV90704CX*
(Rise Range: 30 - 60°F)
A
B
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