Leg Assembly; Rigging - Data Aire DARC 03 Installation, Operation & Maintenance Manual

Condensers should not be closer than 36 inches from a wall or any obstruction. With proper clear-
ance on all other sides units can be placed side by side. Additional units should be placed no closer
than 48 inches apart, see Figure 1. Avoid air recirculation conditions that could be caused by walls,
screening, etc. Do not connect ductwork to the coil inlet or fan outlet. Keep fan discharge away
from building air intakes.
The remote heat exchanger must be located in an area that will ensure airflow into and out of the
heat exchanger plus adequate service access clearance. Short circuiting of the airflow or the in-
take of warmer air from another unit will seriously degrade the performance of the air-cooled heat
exchanger.
Do not locate the heat exchanger in a location that is bordered by tall obstructions (i.e. higher than
10 feet) on no more than two sides. See Figure 1 for minimum clearance from obstructions and
between units. With proper clearance on all sides, two units can be placed side by side. Additional
units should be placed at least 48 inches apart.
Noise factors should be considered when locating an air-cooled heat exchanger. Proximity to win-
dows, walls and surrounding structures can cause objections by the occupants. An acoustical ex-
pert should be consulted when noise is of a particular concern.
Avoid installing units near occupied spaces, above or outside utility spaces and corridors whenever
possible in order to reduce sound transmission and/or vibration to occupied spaces. Refrigerant
piping should be flexible enough to prevent transmission noise or vibration from the unit. Isolation
hangers should be used to prevent the transmission of vibration on all suspended (from the building)
refrigerant lines.
Air-cooled condensers should be placed at a level that is higher than the indoor evaporator. It is not
recommended to mount the condenser more than 10 feet below the evaporator. Excessive liquid
line pressure drop can cause poor evaporator performance.
1.6

Leg Assembly

The legs must be unbolted from their collapsed shipping position and extended prior to placing the
unit on its pad. Each leg extends down approximately 18" and reattaches using the same bolts.
NOTE: Failure to extend the legs will result in poor air distribution over the cooling coil
resulting in significant capacity reduction and system failure.
Concrete pads are often used to provide support for the heat exchanger when set on the ground.
Bolt holes in the bottom of each leg can be used to anchor the unit. Units mounted on the roof
should be placed on rails designed to distribute the unit weight. Standard practices and local codes
should be followed in either instance.
1.7

Rigging

Outdoor condensers should be moved to their mounting location (typically rooftop) using a crane or
fork lift. Each fan section has heavy gage, steel leg supports with lifting holes at the top.
7 Air Cooled Condenser User Manual
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