American Standard 2A6H8030A, Application Manual

Page: 13 / 20

4. Installation of multiple units on a pad or rooftop where the top clearance is open.
A) Refer to minimum clearance table in the lower corner of this page for required clearances
B) National Electric Code requires 3 feet minimum (4 feet if certain conditions are present) clearance
between service access panel and adjacent unit. If service access panel faces the wall, the required
space between the wall and the unit shall be minimum 3 feet. (May require as much as 3 1/2 feet)
C) Walls / Fence height shall not be higher than top of units.
D) National, State, and Local Codes must be observed.
1.0’
m i n * *
1.0’
min**
1.0’
min**
1.0’
min**
1.0’
min**
1.0’
min**
1.5’
m i n
1.5’
m i n
1.5’
m i n
1.5’
m i n
1.5’
m i n
1.5’
m i n
-3.0’-
min
-3.0’-
min
1.5’
min
1.5
min
-3.0’-
min
1.5
min
Service Access *
Service Access *
Service Access *
Service Access *
Service Access *
Service Access *
Service Access *
Service Access * Service Access *
* Units may be rotated as shown on above, in order that service access sides face each other
provided that 3 feet minimum clearance be maintained between the units. In order to
comply with NEC, this may increase to 4 feet minimum clearance.
** If wall or fence is to be constructed around the entire perimeter of the mechanical yard,
Maintain minimum 1.5 feet clearance from the units. The fence height shall not exceed
that of the unit. It is recommended to install louvers in the fence to allow no greater than
300 feet per minute velocity. Consult the table on page 18 for unit airflow. Place louvers in
the lower section of the fence by each unit in order to provide air access to each unit
located by the fence. The lower portion of the fence may also be cut in order to equal the
calculated free area.
Pg. 13
Clearances apply to geographical
areas where the design outdoor dry
bulb = 105 F or less