IM 676
5
Clearances
The flow of air to and from the condenser coil must not be limited. Restricting air flow or allowing
air recirculation will result in a decrease in unit performance and efficiency. There must be no
obstruction above the unit that would deflect discharge air downward where it could be recirculated
back to the inlet of the condenser coil. The condenser fans are propeller type and will not operate
with ductwork on the fan outlet.
Install the unit with enough side clearance for air entrance to the coil and for servicing.
Provide service access to the evaporator, compressors, electrical control panel and piping
components as shown in Figure 3.
Do not allow debris to accumulate near the unit. Air movement may draw debris into the
condenser coil causing air starvation. Give special consideration to low ambient operation where
snow can accumulate. Keep condenser coils and fan discharge free of snow or other obstructions to
permit adequate airflow.
Figure 3, Clearance requirements
ALR Unit Size
Minimum "X" Dimension
032E -075E
8 ft (2438 mm)
080E - 185E
10 ft (3048 mm)
Sound Isolation
The ultra-low sound levels of the ALR reciprocating
chiller is suitable for most applications. When
additional sound reduction is necessary, locate the
unit away from sound sensitive areas. Avoid
locations beneath windows or between structures
where normal operating sounds may be
objectionable. Reduce structurally transmitted sound
by isolating water lines, electrical conduit and the
unit itself. Use wall sleeves and rubber isolated
piping hangers to reduce transmission of water or
pump noise into occupied spaces. Use flexible
electrical conduit to isolate sound through electrical
conduit. Spring isolators are effective in reducing the low amplitude sound generated by
reciprocating compressors and for unit isolation in sound sensitive areas.
Service Access
Each end of the unit must be accessible after installation for periodic service. Compressors, filter-
driers, and manual liquid line shutoff valves are accessible on each side of the unit adjacent to the
control box. High pressure, low pressure, and motor protector controls are on the compressor.
Freezestats and cooler barrel thermostats are near the cooler. Most other operational, safety and
starting controls are located in the unit control box.
The condenser fan and motors can be removed from the top of the unit.
5 ft. (1524mm) Clearance for
air inlet
4 Ft.
(1220mm)
clearance for
service access
"X" clearance
for evaporator
tube removal
5 Ft. (1524mm) clearance for
air inlet