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INSTALLATION INSTRUCTIONS
WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings must
be cut through the wall as shown in Figure 1 or 2.
Figure 1 is for models W48A13 and W60A13.
Figure 2 is for models W48A12 and W60A13.
Figure 3 is for models W48L13 and W60L13.
Figure 4 is for models W48L12 and W60L12
Figure 5 is for model W70A13
Figure 6 is for model W70L13
2. On wood frame walls, the wall construction must be
strong and rigid enough to carry the weight of the
unit without transmitting any unit vibration.
WARNING
Fire hazard can result if 1/4 inch clearance to
combustible materials for supply air duct is
not maintained.
3. Concrete block walls must be thoroughly inspected
to insure that they are capable of carrying the weight
of the installed unit.
W48A12, W48L12 & W60A12, W60L12 ONLY
These units are equipped with adjustable return and
supply air flanges. The flanges are adjustable side to side
in 1" increments. This allows these units to be adjusted
so that in side by side applications these units can replace
two 2 Ton units using the same wall openings.
MOUNTING THE UNIT
1. These units are secured by wall mounting brackets
which secure the unit to the outside wall surface at
both sides. A bottom mounting bracket is provided
for ease of installation, but is not required.
2. The unit itself is suitable for 0 inch clearance, but the
supply air duct flange and the first 3 feet of supply air
duct require a minimum of 1/4 inch clearance to
combustible material. If a combustible wall use a
minimum of 30½" x 10½" dimensions for sizing.
However, it is generally recommended that a 1 inch
clearance is used for ease of installation and maintaining
the required clearance to combustible material. The
supply air opening would then be 32" x 12".
Manual 2100-515B
Page
6 of 23
WARNING
Failure to provide the 1/4 inch clearance
between the supply duct and a combustible
surface for the first 3 feet of duct can result in
fire causing damage, injury or death.
3. Locate and mark lag bolt locations and bottom
mounting bracket location.
4. Mount bottom mounting bracket.
5. Hook top rain flashing under back bend of top. Top rain
flashing is shipped secured to the right side of the back.
6. Position unit in opening and secure with 5/16 lag bolts;
use 7/8 inch diameter flat washers on the lag bolts.
7. Secure rain flashing to wall and caulk across entire
length of top.
8. For additional mounting rigidity, the return air and
supply air frames or collars can be drilled and
screwed or welded to the structural wall itself
(depending upon wall construction). Be sure to
observe required clearance if combustible wall.
9. On side by side installations, maintain a minimum of
20 inches clearance on right side to allow access to
control panel and heat strips, and to allow proper
airflow to the outdoor coil. Additional clearance
may be required to meet local or national codes.
C
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n
c
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e
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a
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d
A
d
e
q
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a
e t
C
o
n
M
O
D
E
L
S
W
4
8
, A
W
6
0
, A
W
7
0
A
W
4
8
, L
W
6
0
, L
W
7
0
L
NOTE: For side by side installation of two (2) W**A models there
must be 20" between units. This can be reduced to 15" by using
a W**L model (left side compressor and controls) for the left unit
and WA (right side compressor and controls) for right unit.
See W**A Specification S3397 & W**L Specification S3400
and Specification Sheet S3409 for 6-Ton W**A / W**L.
TABLE 1
MAXIMUM ESP OF OPERATION
ELECTRIC HEAT ONLY
M
O
D
E
L
S
W
6
0
A
1
3
-
O
N
L
Y
W
6
0
L
1
3
-
O
N
L
Y
W
7
0
A
1
3
-
O
N
L
Y
W
7
0
L
1
3
-
O
N
L
Y
VALUES SHOWN ARE FOR UNITS EQUIPPED WITH
STANDARD 1" THROWAWAY FILTERS OR 1" WASHABLE
FILTERS. DERATE ESP BY .15 FOR 2" PLEATED FILTERS.
d
f
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c i
e
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c
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A
f r i
o l
w
L
E
F
T
S
D I
E
R
G I
H
T
S
2
" 0
2
" 0
2
" 0
2
" 0
E
S
P
A
0
5
4 .
A
1
0
3 .
A
1
0
3 .
A
1
0
3 .
s
s
D I
E
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