Bard MEGA-TEC W090A, Service Instructions Manual

Page: 69 / 159

Manual 2100-705B
Page 7 of 43
SITE PREPARATION
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
3 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
To maintain full service access and adequate condenser
airflow, side-by-side installations require 28" of
clearance between units for access to the economizer
(20" of clearance between units without economizers)
and proper airflow of the outdoor coil (see Figure 2).
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.
5
"
8
50
"
10ft 10ft
20" 20"
2
1
44
28" WITH ECONO
20" NON-ECONO
5ft *
5ft *
44
1
2
"
" 50
5
8
SHELTER
↑↑↑ ↑↑↑
EQUIPMENT
↑↑↑
SHELTER
EQUIPMENT
SUPPLY AIR
UNIT #1
OUTDOOR
↑↑↑
SUPPLY AIR
CLEARANCE AREA
↑↑↑ ↑↑↑
UNIT #2
MIS-3962
FIGURE 2
Clearance Required for Service Access and Adequate Condenser Airflow
* Recommended distance between return air opening and equipment in room. Supply
airtstream must be able to provide adequate air circulation throughout the room.
All national, state and local codes must be observed and followed during installation.