Trane CGAD020, Installation Operation & Maintenance

Page: 10 / 85

CGAD-SVN02C-EN 10
Clearance between Units and
Sound Pressure (dBA)
Make sure that there is enough space
around the unit externally in order to allow
the installation and maintenance team to
have unrestricted access to all service
points. Check the unit's dimensions in the
drawings that were approved. We
recommend a minimum of 4 feet (1.2 m)
for servicing the compressor. Make sure
there is enough space to open the control
panel doors. Above all, any local codes that
determine additional spaces needed have
priority over these recommendations.
The warm air recirculation and the
depletion of the coil cause a reduction in
the unit's efficiency and capacity due to an
increase in the charge pressures. Do not
allow residues, trash, and other materials
to accumulate around the unit. The
Fig. 05b - Recommended clearances - between units
Fig. 05a - Recommended clearances - horizontal assembly
CGA D020C 64
CGA D025C 65
CGA D030C 65
CGA D040C 67
CGA D050C 68
CGA D060C 68
CGA D070C 70
CGA D080C 72
CGA D090C 72
CGA D100C 72
CGA D120C 74
CGA D150C 74
Pr e s s ão Sonor a
(dbA) a 10 m e tr os
Equipam e nto
Notes: Measurements are made on the side of
equipment at distance of 10 meters. Measurements
smaller than 10 meters may provide diferents results
because the large size of equipment and different
sources of noise located in defferent positions.
movement of air supply can cause
residues to be sucked up into the
condenser coil and block the spaces
between the fins of the coil and cause the
coil to become depleted. The units for low
ambient temperatures need special
attention. The coils of the condensers and
the discharge of the fans should be kept
free of snow and of other obstructions to
allow an adequate air flow and a
satisfactory operation.
In situations in which the equipment has to
be installed with less space than that
recommended, which frequently occurs in
applications with retroactive updates and
with ceiling assemblies, a restricted air
flow is common.
An unobstructed air flow for the condenser
is essential to maintain the chiller's
operational capacity and efficiency. When
deciding on the unit's position, plan
carefully in order to ensure enough air flow
through the condenser's heat transfer
surface. Two possible harmful conditions
must be avoided for the equipment to
reach its optimum performance: warm air
recirculation and the depletion of the coil.
Warm air recirculation occurs when the
discharge air from the condenser fans is
blown to the entrance of the condenser
coil. The coil's depletion occurs when the
free air-flow (or part of it) to the condenser
is restricted.