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ES Series splits are designed for either indoor or
outdoor installations, and offer exceptional flexibility
for both replacement and new construction applica-
tions. The term “split” refers to the fact that there
are actually two pieces of equipment in the system.
Whether it’s installed indoors or outside, the ES
geothermal unit (compressor section) is connected
to an air handler or fossil fuel (gas, propane or oil)
furnace. This allows the ES unit to be located some
distance away from the actual blower section.
The unit will provide all the air conditioning require-
ments and a portion of the heating load down to a
pre-determined temperature. When connected to a
fossil fuel furnace, the geothermal unit disengages
when outdoor temperatures fall below the change-
over point, allowing the fossil furnace to provide
the balance of the heating required. If the split is connected to a standard air handler, the use of auxiliary electric
(back-up heat) may be needed at outdoor temperatures lower than the changeover point, but the geothermal unit
will continue operating (see page 42).
Depending on the size, the compressor in the unit could be reciprocating (sizes 024, 030), or Dual Capacity (sizes
036, 048, 060, 072). Dual capacity compressors have the ability to operate in both low and high stage, depending
on the heating and cooling requirements. In the event that the first stage of operation (part capacity) does not satisfy
the thermostat, the unit will automatically change to second stage (full capacity) compressor operation. In order to
change from first stage to second stage, units with dual capacity compressors require a brief OFF cycle. This is
normal and will not affect your comfort due to the short changeover time. If the connected air handler or furnace is
equipped with a variable speed blower, you may notice the fan speed change depending on the mode of operation.
A sophisticated microprocessor control sequences all components during operation for optimum performance. This
control also facilitates troubleshooting for the service technician. The unit’s heat exchanger is made of a copper-
nickel alloy to resist corrosion.
The cabinet is finished with poly paint for long lasting beauty and protection, adding to the durability of the unit when
it’s installed outside. Where there is a need to conceal the unit outdoors, or to add an aesthetic touch, an optional
decorative rock cover is available in four colors (brown granite, gray granite, salt & pepper, and charcoal basalt).
See your dealer for details on this option.
ES Series units are performance-certified to ARI ISO 13256-1 standards, are ETL safety listed, and are ENERGY
STAR® qualified. Like our E Series products, ES units utilize the ozone-safe R-410A refrigerant.
Because ES units are used in conjunction with other manufacturer’s air handlers or fossil fuel furnaces, refer to the
documents included with those units for further operating and service information.
ES Series Units
PRODUCT INFORMATION FOR UNITS, OPTIONS & ACCESSORIES
