Return Air Filters - Trane A952V040BU3SB Installation, Operation And Maintenance Manual

Return Air Filters

T T Y Y P P I I C C A A L L U U P P F F L L O O W W R R E E T T U U R R N N A A I I R R F F I I L L T T E E R R
I I N N S S T T A A L L L L A A T T I I O O N N S S
Filters are not factory supplied for upflow furnaces.
Filter size needed will be dependent on type of filter
and CFM requirement. Filters must be installed
externally to the unit.
I I m m p p o o r r t t a a n n t t : : It is recommended to transition return
ducting to the same size as the opening. It
is acceptable for return duct or filter frame
to extend forward of the opening but
plastic plugs MUST be installed in any
opening that the duct or filter frame may
cover.
Table 23. Upflow Return Air Filters
Furnace Width
17 – 1/2"
21"
24 – 1/2"
Note: For upflow furnace models in any configuration, where the
airflow requirement exceeds 1600 CFM - Furnaces will
require return air openings and filters on: (1) both sides,
or (2) one side and the bottom, or (3) just on the bottom.
P P r r e e p p a a r r a a t t i i o o n n f f o o r r U U p p f f l l o o w w B B o o t t t t o o m m a a n n d d S S i i d d e e R R e e t t u u r r n n A A i i r r
F F i i l l t t e e r r I I n n s s t t a a l l l l a a t t i i o o n n s s
All return air duct systems should provide for
installation of return air filters.
1. Determine the appropriate position to set the
furnace in order to connect to existing supply and
return ductwork.
2. For upflow side return installations, remove the
insulation around the opening in the blower
compartment
3. The side panels of the upflow furnace include
locating notches that are used as guides for cutting
an opening for return air, refer to the figure and the
upflow furnace outline drawing for duct connection
dimensions for various furnaces.
4. If a 3/4" flange is to be used for attaching the air
inlet duct, add to cut where indicated by dotted
lines. Cut corners diagonally and bend outward to
form flange.
5. If flanges are not required, and a filter frame is
installed, cut between locating notches as in
illustration.
6. The bottom panel of the upflow furnace must be
removed for bottom return air.
A952V-SVX001-1B-EN
Filter
Qty and Size
1 – 16" x 25" x 1"
1 – 20" x 25" x 1"
1 – 24" x 25" x 1"
UPFLOW FURNACES ONLY
*
LOCATING
NOTCHES
PROVIDED
*
FOR SIDE
RETURN
CUTOUT
*
*
* SEE OUTLINE DRAWING
R R E E T T U U R R N N A A I I R R F F I I L L T T E E R R S S F F O O R R F F U U R R N N A A C C E E I I N N
H H O O R R I I Z Z O O N N T T A A L L C C O O N N F F I I G G U U R R A A T T I I O O N N
When the furnace is installed in the horizontal
configuration, the return air filters must be installed
exterior to the furnace cabinet. Remote filter grilles
may be used for homeowner convenience, refer to
Figure 6, p. 63 or the filters may be installed in the duct
work upstream of the furnace, refer to
Filter kits are available for horizontal applications.
D D i i r r e e c c t t c c o o u u p p l l e e d d s s i i d d e e r r e e t t u u r r n n s s a a r r e e n n o o t t a a l l l l o o w w e e d d t t o o t t h h e e
b b l l o o w w e e r r c c a a b b i i n n e e t t . .
Figure 6. Remote Filter Installation
FRONT
OF FURNACE
Figure 7, p. 64.
63