Technical Information

BLOWER PERFORMANCE SPECIFICATIONS
21
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 maximum.
AMVC8/GMVC8 Heating Speed Charts
Heating
Speed
Tap
Adj ust Tap
Low-
Stage
CFM
High-
Stage
CFM
Rise (°F)
Heating
Speed
Tap
Adjust
Tap
Low-
Stage
CFM
High-
Stage
CFM
Rise (°F)
Minus (-) 790 1125 46 Minus (-) 945 1350 49
Normal 875 1250 41 Normal 1050 1500 44
Plus (+) 960 1375 38 Plus (+) 1155 1650 40
Minus (-) 850 1215 43 Minus (-) 1010 1440 46
Normal 945 1350 38 Normal 1120 1600 42
Plus (+) 1040 1485 35 Plus (+) 1230 1760 38
Minus (-) 915 1305 40 Minus (-) 1070 1530 44
Normal 1015 1450 36 Normal 1190 1700 39
Plus (+) 1115 1595 33 Plus (+) 1310 1870 36
Minus (-) 975 1395 37 Minus (-) 1135 1620 41
Normal 1085 1550 33 Normal 1260 1800 37
Plus (+) 1195 1705 30 Plus (+) 1385 1980 34
Heating
Speed
Ta
p
Adj ust Tap
Low-
Stage
CFM
High-
Stage
CFM
Rise (°F)
Minus (-) 1090 1555 55
Normal 1210 1725 49
Plus (+) 1330 1900 45
Minus (-) 1105 1575 54
Normal 1225 1750 49
Plus (+) 1350 1925 44
Minus (-) 1120 1600 53
Normal 1245 1775 48
Plus (+) 1370 1955 44
Minus (-) 1135 1620 53
Normal 1260 1800 47
Plus (+) 1385 1980 43
D
B
C
AMVC80604B***
GMVC80604B***
(
Rise Ran
g
e: 20° - 50°F
)
AMVC80805C***
GMVC80805C***
(
Rise Ran
g
e: 20° - 50°F
)
A
B
A
B
C
D
C
D
AMVC81005C***
GMVC81005C***
(
Rise Ran
g
e: 25° - 55°F
)
A