Islandaire EZ42091231S46AA User Manual

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Manufacturer of Quality Air Conditioning and Heating Products • www.islandaire.com • sales@islandaire.com • (800)-886-2759

Information for Heat Pump units

Heat pump models oer substantial savings over models

with conventional electric resistance heaters.

Islandaire’s PTAC units provide indoor comfort in the

same manner as conventional air conditioners, removing

heat and humidity from indoor air. e heat and humid-

ity is released to the outdoors. Islandaire’s high eciency

design saves energy and reduces cooling costs.

When the outdoor coil temperature is above 20 °F

(approximately 35 °F outdoor-air temperature), the heat

pump draws heat from outdoor air and uses it to heat

indoor air. Since heat is transferred and not produced,

the heat pump uses less electricity and reduces energy

costs signicantly.

If the outdoor coil temperature falls below 20 °F (approx-

imately 35 °F outdoor-air temperature), the unit auto-

matically switches on a built-in electric heater. e com-

pressor stops and a blower circulates warm air produced

by the heater. When the outdoor coil temperature rises

above 40 °F, heat pump operation resumes automatically.

Heat Pump Features

OUTDOOR THERMOSTAT:

During the heating cycle, the outdoor thermostat senses

outdoor coil temperature. It switches the unit to electric

heat mode when the outdoor coil temperature is 20 °F or

below (approximately 35 °F outdoor-air temperature).

e thermostat switches the unit back to heat pump

mode when the outdoor coil temperature rises above 40

°F, which is enough to provide heat to meet demand. e

entire operation is completely automatic.

REVERSING VALVE:

e reversing valve controls the direction of refrigerant ow

for both heating and cooling functions and remains ener-

gized as long as the controls are in the heat position. When

the cooling controls are activated, the valve automatically

reverses to the cooling position.

NOTE: Be sure to connect reversing valve wiring to the

B (blue wire) connection of the thermostat for heat pump

applications.

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Islandaire EZ42091231S46AA 9500 BTU PTAC Air Conditioner with 11600 BTU Electric Heat