RTAD-SVX01F-E4
27
Installation - Mechanical
Foundation
Provide rigid, non-warping mounting
pads or a concrete foundation of
sufficient strength and mass to
support the outdoor unit operating
weight (i.e., including completed
piping, and full operating charges of
refrigerant, oil and water). Refer to
Tables 1-23 for unit operating
weights. Once in place, the outdoor
unit must be level within 1/4" (6 mm)
over its length and width. A base or
foundation is not required if the
selected unit location is level and
strong enough to support the unit's
operating weight. Trane is not
responsible for equipment problems
resulting from an improperly
designed or constructed foundation.
Note: To allow for cleaning under the
condensing coil, it is recommended
that an opening be left between the
unit base and the concrete pad.
Clearances
Refer to Figure 2 for minimum
clearances. Provide enough space
around the outdoor unit to allow the
installation and maintenance
personnel unrestricted access to all
service points. Refer to submittal
drawings for the unit dimensions. A
minimum of four feet is
recommended for compressor
service. Provide sufficient clearance
for the opening of control panel
doors. In all cases, local codes which
require additional clearances will
take precedence over these
recommendations.
Unobstructed flow of condenser air
is essential to maintain chiller
capacity and operating efficiency.
When determining unit placement,
give careful consideration to
assuring a sufficient flow of air
across the condenser heat transfer
surface. Two detrimental conditions
are possible and must be avoided if
optimum performance is to be
achieved: warm air recirculation and
coil starvation. Warm air
recirculation occurs when discharge
air from the condenser fans is
recycled back to the condenser coil
inlet. Coil starvation occurs when
free airflow to (or from) the
condenser is restricted. Both warm
air recirculation and coil starvation
cause reduction in unit efficiency
and capacity due to the increased
head pressures. Debris, trash,
supplies etc. should not be allowed
to accumulate in the vicinity of the
unit. Supply air movement may
draw debris into the condenser coil,
blocking spaces between coil fins
and causing coil starvation. Special
consideration should be given to
low ambient units. Condenser coils
and fan discharge must be kept free
of snow or other obstructions to
permit adequate airflow for
satisfactory unit operation.
