Goodman ACS series Service Instructions Manual page 70

PRODUCT DESIGN
AMV9, ACV9, GMV9, GCV9, GMV95
COOLING AIRFLOW REQUIREMENT (CFM)
600 800
0453__XA 376* 384
0704__XA ---
0905__XA ---
1155__XA ---
COOLING AIRFLOW REQUIREMENT (CFM)
600 800
0704__XA ---
0905__XA ---
*Minimum filter area dictated by heating airflow requirement.
Permanent Minimum Filter Area (sq. in)
[Based on a 600 ft/min filter face velocity]
[Based on 300 ft/min filter face velocity]
Permanent Minimum Filter Area (in
[Based on 600 ft/min filter face velocity]
The sketch below shows how the filter is retained over the
bottom return air opening on (Upflow) 90% furnace installa-
tions only with kit # RF000180.
FILTER
RE TAIN ER
FU R N AC E BO TTOM
Optional (RF000180) Bottom Return Filter Retention
One inch throwaway filters should be sized for a face veloc-
ity of 300 feet per minute or less (14x25x1 throwaway = 730
CFM maximum, 16x25x1 throwaway = 830 CFM maximum,
18x25x1 throwaway = 940 CFM maximum, 20x25x1 throw-
away = 1040 CFM maximum) All other filters should be sized
according to their manufacturer's instructions.
To find the miminum filter requirement (in
nent or disposable filters divide the required airflow (CFM) by
the rated velocity of the filter, either 300ft/min for disposable
filter or 600ft/min for permanent filter. Multiply the number by
144 in. to obtain the minimum filter requirement (in
2
70
UPFLOW
1000 1200 1400 1600
480 576 --- ---
--- 627* 627* 672 768
--- --- 836* 836* 836*
--- --- 940* 940* 940*
COUNTERFLOW
1000 1200 1400 1600
--- 320* 320* 336 384
--- --- 427* 427* 427*
CA PTIVE LAN C ES
IN B ACK PAN EL
FILTER
) for either perma-
2
EXAMPLE:
Filter Size (in
2000
---
Filter Size (in
---
960
960
2000
Upflow furnaces with air delivery of less than 1800 CFM:
---
Use one side return or one bottom return ductwork connec-
480
tion.
Upflow furnaces with air delivery of 1800 CFM or higher:
Use two side returns or one side return and one bottom
return connection.
Guide dimples locate the side and bottom return cutout lo-
cations. Use a straight edge to scribe lines connecting the
dimples. Cut out the opening on these lines. An undersized
)
2
opening will cause reduced airflow. For bottom return con-
nection, remove the bottom of the cabinet before setting the
furnace on the raised platform or return air duct.
A closed return duct system must be used, with the return
duct connected to the furnace. NOTE: Ductwork must never
be attached to the back of the furnace. Supply and return
connections to the furnace may be made with flexible joints
to reduce noise transmission, if desired. If a central return
is used, a connecting duct must be installed between the
unit and the utility room wall so the blower will not interfere
with combustion air or draft. The room, closet, or alcove
must not be used as a return air chamber.
When the furnace is used in connection with a cooling unit,
the furnace should be installed in parallel with or on the
upstream side of the cooling unit to avoid condensation in
the heating element. With a parallel flow arrangement, the
dampers or other means used to control the flow of air must
be adequate to prevent chilled air from entering the furnace
and, if manually operated, must be equipped with means to
prevent operation of either unit unless the damper is in the
full heat or cool position.
When the furnace is heating, the temperature of the return
air entering the furnace must be between 55°F and 100°F.
UPRIGHT FILTER INSTALLATIONS
Depending on the installation and/or customer preference,
differing filter arrangements can be applied. Filters can be
installed in the central return register, the bottom of the
blower compartment (upflow filter kit # RF000180), a side
).
2
panel external filter rack kit (upflow filter kit # EFR01), or
the ductwork above a counterflow furnace (kit # RF000181).
1400 CFM x 144 in
2
) =
600 ft./min. (Permanent)
1400 CFM x 144 in
2
) =
300 (Disposable) ft./min.
2
Filter Size = 672in Disposable
2
Filter Size = 336in Permanent
2
2