Site Preparation; Model Identification; New Shelter Installation Vs. Retrofit Installation; Minimum Clearance - Bard MULTI-TEC W18AAPA Service Instructions Manual

Model Identification

Identify the specific model using the model
nomenclature information found in Figure 1 and
the model/serial tag found on the unit. See Figure
2 on page 8 for dimensions and critical installation
requirements.
New Shelter Installation vs. Retrofit
Installation
These installation instructions cover both new shelter
installations and retrofit installations. Each installation
is unique and may require special accommodations and
modifications. Although Bard Manufacturing follows a
long-established tradition of manufacturing equipment
using industry standard dimensions for building
penetration, it is occasionally necessary to move or
enlarge supply and return openings when replacing
non-standardized equipment in a retrofit application.

Minimum Clearance

Wall-mount air conditioners are available in both right-
hand access models and left-hand access models.
Right-hand access models have the heat strip access
panel, external circuit breakers access panel and
internal controls access panel on the right side of the
unit. Left-hand access models are a mirror image of the
right-hand access models, and allow two wall-mount
units to be placed in relatively close proximity and yet
still allow complete access for maintenance and repair.
On side-by-side installations, maintain a minimum of
20" clearance on control side to allow access to control
panel and heat strips, and to allow proper airflow to the
outdoor coil. For installations where units are installed
with both control panels facing each other (inward),
maintain a minimum of 36" clearance to allow access.
Additional clearance may be required to meet local or
national codes.
Care should be taken to ensure that the recirculation
and obstruction of condenser discharge air does not
occur. Recirculation of condenser discharge air can
be from either a single unit or multiple units. Any
object such as shrubbery, a building or a large object
can cause obstructions to the condenser discharge air.
Recirculation or reduced airflow caused by obstructions
will result in reduced capacity, possible unit pressure
safety lockouts and reduced unit service life.
For units with blow through condensers, such as
these wall-mount units, it is recommended there be
a minimum distance of 10' between the front of the
unit and any barrier or 20' between the fronts of two
opposing (facing) units.

SITE PREPARATION

Clearances Required for Service Access and
Adequate Condenser Airflow
MODELS
W18A, W24A, W30A, W36A
W18L, W24L, W30L, W36L
W42A, W48A, W60A, W72A
W42L, W48L, W60L, W72L
NOTE: For side-by-side installation of two units 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 W**A
(right side compressor and controls) for right unit.
See Specifications Sheet S3532.

Clearance to Combustibles

WARNING
!
Fire hazard.
Maintain minimum 1/4" clearance between the
supply air duct and combustible materials in
the first 3' of ducting.
Failure to do so could result in fire causing
damage, injury or death.
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. However, it is generally recommended that
a 1" clearance is used for ease of installation and
maintaining the required clearance to combustible
material. See Figures 4A-D on pages 10-13 for details
on opening sizes.
Minimum Clearances Required to
Combustible Materials
MODELS
W18A, L
W24A, L
W30A, L
W36A, L
W42A, L
W48A, L
W60A, L
W72A, L
LEFT RIGHT DISCHARGE
SIDE SIDE SIDE
15" 20" 10'
20" 15" 10'
20" 20" 10'
20" 20" 10'
SUPPLY AIR DUCT
CABINET
FIRST 3'
0" 0"
1/4" 0"
1/4" 0"
Manual 2100-676D
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