IOMM AGR-1 AGR 070A through 100A 5
Location
Unit Placement
AGR units are for outdoor applications and can be mounted on a roof or ground level. Set units on a
solid and level foundation. For roof mounted applications, install the unit on a steel channel or I-
beam frame to support the unit above the roof. For ground level applications, install the unit on a
substantial base that will not settle. A one piece concrete slab with footings extended below the frost
line is recommended. Be sure the foundation is level (within 1/2” [13mm] over its length and width).
The foundation must support the operating weights listed in the Physical Data tables beginning on
page 13.
On ground level applications protect fins against vandalism using the optional coil guards or by
erecting a screen fence. The fence must allow free flow of air to the condenser coil for proper unit
operation.
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.
Sound Isolation
The ultra-low sound levels of the AGR 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 and Clearances
Each end of the unit must be accessible after installation for periodic service. Compressors, filter-
driers, and manual liquid line shutoff valves are accessible. The high pressure control is located in the
control panel when using the Global UNT controller, and on the compressor when using the
MicroTech controller. Low pressure, and motor protector controls are on the compressor. 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.
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