Manual 2100-581B
Page 6 of 26
Clearances Required for Service Access
and Adequate Condenser Airflow
MODELS
LEFT
SIDE
RIGHT
SIDE
DISCHARGE
SIDE
W17A, W18A, W24A, W30A, W36A
15"
20"
10'
W17L, W18L, W24L, W30L, W36L
20"
15"
10'
W42A, W48A, W60A, W70A
20"
20"
10'
W42L, W48L, W60L, W70L
20"
20"
10'
Minimum Clearances Required to
Combustible Materials
MODELS
SUPPLY AIR DUCT
FIRST THREE FEET CABINET
W17A, L / W18A, L / W24A, L
0"
0"
W30A, L / W36A, L
1/4"
0"
W42A, L / W48A, L
W60A, L / W70A, L
1/4"
0"
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.
INSTALLATION INSTRUCTIONS
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.
WALL MOUNTING INFORMATION
1. Two holes for the supply and return air openings
must be cut through the wall as shown in Figure 3.
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.
3. Concrete block walls must be thoroughly inspected
to insure that they are capable of carrying the
weight of the installed unit.
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, attached
to skid for shipping, 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 for model series
W30, W36, W42, W48, W60 and W70. However,
it is generally recommended that a 1-inch clearance
is used for ease of installation and maintaining the
required clearance to combustible material. See
Figure 3 for details on opening sizes.
3. Locate and mark lag bolt locations and bottom
mounting bracket location. See Figure 3.
4. Mount bottom mounting bracket.
5. Hook top rain flashing, attached to front - right of
supply flange for shipping, under back bend of top.
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. See Figure 3.
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.
