Emerson 2 User Manual

The 4 or 5 ton units with 3 ton supply and return openings are designed to replace 3 ton wall mounted 

air conditioners using existing wall openings. The economizer/fresh air option is not available. Return 

filter is located in the return air grille and must be selected from accessory equipment.

The quiet and efficient scroll compressor features a suction gas cooled motor, internal centrifugal oil 

pump, vibration isolating mountings and internal thermal overloads.

The standard compressor location is on the right when viewing the unit when it is mounted on the 

wall. The optional compressor location is on the left, to improve serviceability of the compressor when 

the unit is installed as one unit of a pair.

An optional compressor crankcase heater is available for use with the scroll compressor but is not 

required because the refrigerant charge of the InteleCool2 unit with scroll compressor is less than the 

compressor critical charge.

This option is provided for applications where the ambient temperature exceeds the normal design 

capabilities of the units. It consists of a condenser motor and fan blades which are sized to provide 

additional airflow across the condenser coil. Designed for applications up to 125°F (51°C) ambient.

Heat is provided in a single stage from an open wire electric resistance element. Heating capacity 

options available are 5 kW, 10 kW, and 15 kW depending on unit model size.

The Economizer allows outside air to be introduced to the space through the evaporator filter when 

conditions are favorable for Economizer cooling. It contains a modulating damper, spring return 

direct drive actuator, enthalpy control for switchover, outside air hood and a mixed air controller set 

at 55°F (12.8°C). Mechanical cooling and Economizer operation do not operate simultaneously.

Allows outside air to be brought in to meet indoor air requirements. Air is drawn in through the evap-

orator filter. The amount of air to be introduced to the space is field selectable.

Optional color choices for the steel panels are almond (light tan, the color option for the original 

InteleCool), desert brown, or bright white.

The lockout relay latches the detection of a high-pressure condition in the refrigeration circuit and 

prohibits operation of the compressor until the abnormal pressure conditions are acknowledged. The 

lockout relay is reset by cycling the unit main power or by changing the setpoint on the thermostat to 

temporarily eliminate a call for cooling. A normally open set of contacts is provided to terminals 2 and 

3 of the customer terminal strip for monitoring the status of the lock out relay when this option is sup-

plied without the Common Alarm option.

The common alarm provides the necessary components to detect high pressure, low pressure, high 

temperature, or loss of indoor airflow, and to provide a customer signal via a contact closure. To detect 

low pressure, the optional low pressure switch with bypass, T-pack1 or T-pack2 must also be selected.

Provides a PTC resistor to assist the start of the compressor motor in low voltage operation. Available 

only on single phase units.