American Standard 2A6H8030A, Application Manual

Page: 12 / 20

4. Installation of multiple units on a pad or rooftop with unobstructed top clearance.
A) Refer to drawing for minimum clearances.
1) Do not construct cover over units in this application.
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 the wall and the unit shall be minimum 3 feet. (May require as much as 3 1/2 feet)
C) Walls 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
3.0’
min
3.0’
min
-3.0’-
min
3.0’
min
Service Access *
Service Access *
Service Access * Service Access * Service Access *
* Units may be rotated, as shown on the following page, 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. 12
Service Access *
Service Access * Service Access *
Service Access *
3.0’
min
3.0’
min
3.0’
min
Clearances apply to geographical
areas where the design outdoor dry
bulb = 105 F or less