PTAC Owners Manual

• Unit Configuration – There are many different configuration possibilities, through both dipswitches
and the digital keypad, that allow you to configure the unit for your exact application. See section on
unit configuration for more details. Following are the configuration selections that havenot previously
been mentioned:
• F or℃ – The unit can display in either F or ℃
• Indoor Temperature Sensor Biasing – Optimize the room temperature sensor reading to your exact
application (One for cooling, one for drying and another for heating).
• Emergency Heat (for Heat Pump Only) –Disable the compressor during heating mode operation (heat
only with Electric Heat).
• Display Setpoint OR Room Temperature –The unit can be configured to display the room
temperature OR setpoint only, during heating and cooling modes. See section on unit configuration for
more details.
• Limit the Setpoint Range –The unit can be configured to limit the controlling setpoint range.The
display will always show the complete setpoint range, but the controlling setpoint will be limited to the
configured minimum and maximum setpoint selected. See section on unit configuration for more details.
• Energy Management – Sometimes known as Front Desk Control, an input is provided so that the
unit can be manually disabled from a different location. If the unit detects 24vac on this input, it will
automatically turn itself off. If no voltage is detected on the input, the unit will run normally.
• Wall Thermostat Control – A wired wall thermostat can be connected to the unit. If it is, the
unit must be configured to disable the keypad. See section on wired inputs and unit configuration for
more details.
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• Dual-8 Display and LED Display -- Two 8-segment nixie tubes, some LED indicators (They are HIGH,
• Configure Fan to Optimize Selected Application -- Unit can be optimized to selected application by
configuring the fan to run in continuous mode or cycle on and off with the compressor and electric
heater (can be different for both heating and cooling modes). In cycle mode, fan will continue to run after
compressor or electric heater stops in order blow off any residual heat or cool left on coil.
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