46
F
ILTERS
- R
EAD
T
HIS
S
ECTION
B
EFORE
I
NSTALLING
T
HE
R
ETURN
A
IR
D
UCT
WORK
Filters must be used with this furnace. Discuss filter maintenance
with the building owner. Filters do not ship with this furnace, but
must be provided, sized and installed externally by the installer.
Filters must comply with UL900 or CAN/ULCS111 standards. If
the furnace is installed without filters, the warranty will be voided.
On upflow units, guide dimples locate the side return cutout loca-
tions. Use a straight edge to scribe lines connecting the dimples.
Cut out the opening on these lines.
NOTE:
An undersized open-
ing will cause reduced airflow.
Refer to Minimum Filter Area tables to determine filter area re-
quirements.
600
800
1000
1200
1400
1600
2000
0603__XA
---
---
627*
627*
672
768
---
0805__XA
---
---
---
836*
836*
836*
960
1005__XA
1155__XA
---
---
---
940*
940*
940*
960
600
800
1000
1200
1400
1600
2000
0604__XA
---
---
320*
320*
336
384
---
0805__XA
1005__XA
---
---
---
427*
427*
427*
480
In
p
u
t
Ai
rf
lo
w
UPFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
COUNTERFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
In
p
u
t
Ai
rf
lo
w
*Minimum filter area dictated by heating airflow requirement
.
Permanent Minimum Filter Area (sq. in)
[Based on a 600 ft/min filter face velocity]
600
800
1000
1200
1400
1600
2000
0603__XA
---
---
564*
564*
672
768
0805__XA
---
---
---
752*
752*
768
960
1005__XA
1155__XA
---
---
---
940*
940*
940*
960
600
800
1000
1200
1400
1600
2000
0604__XA
---
---
641*
641*
672
768
---
0805__XA
1005__XA
---
---
---
854*
854*
854*
960
In
p
u
t
Ai
rf
lo
w
UPFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
COUNTERFLOW
COOLING AIRFLOW REQUIREMENT (CFM)
Inp
u
t
Ai
rf
lo
w
*Minimum filter area dictated by heating airflow requirement.
Disposable Minimum Filter area (sq. in)
[Based on 300 ft/min filter face velocity]
U
PRIGHT
I
NSTALLATIONS
Depending on the installation and/or customer preference, differ-
ing filter arrangements can be applied. Filters can be installed in
the central return register or a side panel external filter rack kit
(upflows). As an alternative a media air filter or electronic air
cleaner can be used as the requested filter.
The following figure shows possible filter locations.
FIL
T
E
R
AIR FLOW
CENTRAL
RETURN
GRILLE
FI
L
T
E
R
SIDE RETURN
EXTERNAL FILTER
RACK KIT
(EITHER SIDE)
Possible Upright Upflow
FI
LT
ER
AIR FLOW
CENTRAL
RETURN
GRILLE
RETURN
DUCT
FI
LT
E
R
FILTER
SUPPORT
BRACKET
(Field Supplied)
FILTER
ACCESS
DOOR
Possible Upright Counterflow
Filter Locations
OPERATION
