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INSTALLATION
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.
See Figures 4 and 5.
3. Concrete block walls must be thoroughly inspected
to insure that they are capable of carrying the
weight of the installing 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 is provided
for ease of installation.
2. The unit itself is suitable for 0 clearance, but the
supply air duct flange and the first 3' of supply
air duct require a minimum of 1/4" clearance to
combustible material. If a combustible wall, use
a minimum of 30-1/2" x 10-1/2" dimensions for
sizing. However, it is generally recommended that
a 1" 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". See Figures 2, 3 and 6 for details.
WARNING
!
Failure to provide the 1/4" clearance
between the supply duct and a combustible
surface for the first 3' of duct can result in
fire causing damage, injury or death.
Clearances Required for Service Access
and Adequate Condenser Airflow
MODELS
HA4S4, HL4S4
HA5S4, HL5S4
NOTE: For side-by-side installation of two H**S4 models, there
must be 20" between units. This can be reduced to 15"
by using a HL*S4 model (left side compressor and con-
trols) for the left unit and HA*S4 (right side compressor
and controls) for right unit.
See H**S4 Specification S3458.
Manual 2100-646
Page
8 of 26
LEFT
RIGHT
DISCHARGE
SIDE
SIDE
SIDE
20"
20"
10"
3. Locate and mark lag bolt locations and bottom
mounting bracket location (see Figure 4).
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" diameter flat washers on the
lag bolts.
7. Secure rain flashing to wall and caulk across
entire length of top (see Figure 2).
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" clearance on right side to
allow access to heat strips and control panel
and to allow proper airflow to the outdoor coil.
Additional clearance may be required to meet
local or national codes.
TYPICAL INSTALLATIONS
See Figure 5 for common ways to install the wall
mount unit.
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing
information and maximum fuse or circuit breaker
size. Each outdoor unit is marked with a "Minimum
Circuit Ampacity". This means that the field wiring
used must be sized to carry that amount of current.
Depending on the installed KW of electric heat, there
may be two field power circuits required. If this is the
case, the unit serial plate will so indicate. All models
are suitable only for connection with copper wire.
Each unit and/or wiring diagram will be marked "Use
Copper Conductors Only". These instructions must
be adhered to. Refer to the National Electrical Code
(NEC) for complete current carrying capacity data on
the various insulation grades of wiring material. All
wiring must conform to NEC and all local codes.
The electrical data lists fuse and wire sizes (75ºC
copper) for all models, including the most commonly
used heater sizes. Also shown are the number of field
power circuits required for the various models with
heaters.
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