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The most important consideration which must be taken into account
when deciding upon the location of air-cooled equipment is the
provision for a supply of ambient air to the condenser, and removal
of heated air from the condensing unit or remote condenser area.
Where this essential requirement is not adhered to, it will result in
higher head pressures, which cause poor operation and potential
failure of equipment. Units must not be located in the vicinity of
steam, hot air or fume exhausts. Corrosive atmospheres require
custom designed condensers.
Another consideration which must be taken is that the unit should
be mounted away from noise sensitive spaces and must have
adequate support to avoid vibration and noise transmission into the
building. Units should be mounted over corridors, utility areas, rest
rooms and other auxiliary areas where high levels of sound are not
an important factor. Sound and structural consultants should be
retained for recommendations.
Figure 1. Space and Location Requirements for Condensing Units and Remote Condensers
* “W” = Total width of the condensing unit or condenser.
Space and Location Requirements for
Air Cooled Condensing Units and Remote Condensers
Units in Pits
The top of the unit should be level with the top of the pit,
and side distance increased to “2W”.
If the top of the unit is not level with the top of pit,
discharge cones or stacks must be used to raise discharge
air to the top of the pit. This is a minimum requirement.
Decorative Fences
Fences must have 50% free area, with 1 foot undercut,
a “W” minimum clearance, and must not exceed the
top of unit. If these requirements are not met, unit must
be installed as indicated for “Units in pits”.
Walls or Obstructions
The unit should be located so that air may circulate freely
and not be recirculated. For proper air flow and access all
sides of the unit should be a minimum of “W” away from
any wall or obstruction. It is preferred that this distance
be increased whenever possible. Care should be taken
to see that ample room is left for maintenance work
through access doors and panels. Overhead obstructions
are not permitted. When the unit is in an area where it
is enclosed by three walls the unit must be installed as
indicated for units in a pit.
Multiple Units
For units placed side by side, the minimum distance
between units is the width of the largest unit. If units
are placed end to end, the minimum distance between
units is 4 feet.