Islandaire PTAC Operating Instructions
Islandaire packaged terminal air conditioners (PTACs) and heat pumps offer solid construction and versatile configurations to meet commercial climate control needs. With such a diverse set of features, proper use is important. If you’re looking for guidance, this set of Islandaire PTAC operating instructions will teach you how to make the most of your machine.
This information applies to EZ series models, such as the EZAD, EZ42 and EZ16, with mechanical pushbutton, base electronic or Intellitemp electronic control systems.
Mechanical Pushbutton Units
- Step 1. Set the desired mode - Select heating or cooling mode by pushing the appropriate button on the control panel.
- Step 2. Adjust the temperature setting - Turn the thermostat knob to select the desired temperature: left for warmer, right for cooler.
- Step 3. Lock in new settings - Wait until the ambient temperature reaches the intended setting. Once it does, turn the knob back towards the center until it clicks: this determines the thermostat’s hold point that the machine will maintain.
- Step 4. Turn the unit off - Power down the machine by pressing the OFF button on the control panel.
Base Electronic Machines
Heating/Cooling Mode
- Step 1. Power on the unit - Press the ON/OFF key to turn on the machine. Once it’s powered on, the current room temperature will show on the display.
- Step 2. Choose a temperature scale - Push the °F/°C button to select a temperature scale (Celsius or Fahrenheit).
- Step 3. Select the operating mode - Set the mode by pushing the HEAT or COOL button.
- Step 4. Adjust the set point - Change the set point temperature by pressing the up-arrow WARM button to raise the temperature or the down-arrow COOL button to lower it.
- Step 5. Select the fan mode - Use the FAN key to select the desired fan mode. The light for HIGH SPEED and LOW SPEED will illuminate if those modes are active, while AUTO will display on the screen if auto mode is chosen.
- Step 6. Turn off the machine - Power down the compressor by pressing the ON/OFF key.
- Step 7. Power down the fan - Stop the fan by pressing the FAN key until the machine is set to AUTO mode.
Fan Operation Only
- Step 1. Power down the machine - Turn off the main part of the unit by pushing the ON/OFF button.
- Step 2. Run the unit in fan-only mode - Continue operating the fan by pressing the FAN key and selecting either HIGH SPEED or LOW SPEED. Be aware that setting the fan to AUTO will deactivate it.
- Step 3. Turn off the fan - Power down the fan completely by pushing the FAN key until it’s set to AUTO mode.
Intellitemp Electronic Units
Heating/Cooling Mode
- Step 1. Power on the unit - Start up the machine by pressing the ON/OFF button.
- Step 2. Change the set point - Push the WARM (up arrow) and COOL (down arrow) keys to adjust the set point temperature. Once selected, the unit will automatically enter heating or cooling mode as needed to reach the indicated temperature.
- Step 3. Choose a mode manually (optional) - Scroll through the modes by pressing and holding the VENT and ON/OFF keys simultaneously, then release them once the desired mode is displayed.
- Step 4. Select the fan mode - Use the FAN key to choose a fan mode and speed. Note that a light indicating your selection will illuminate to the right of the key. Also, be aware that selecting AUTO will turn the fan off completely.
- Step 5. Display the outside air temperature (optional) - Show the outdoor air temperature on the screen by holding down the OUTSIDE TEMP button, if desired.
- Step 6. Open the outside air vent (optional) - Press the VENT key while in cooling mode to draw in outside air, if needed.
- Step 7. Turn off the compressor - Stop the compressor by pressing the ON/OFF button.
- Step 8. Power down the fan completely - Turn off the fan by using the FAN button to set it to AUTO mode.
Fan Operation Only
- Step 1. Power down the compressor - Turn off the main part of the unit by pushing the ON/OFF key.
- Step 2. Select a fan speed - Use the FAN button to select a speed, ranging from LOW to HIGH. Once a speed is selected, the corresponding light will illuminate. Note that setting the fan to AUTO will deactivate it.
- Step 3. Turn off the fan - Stop the fan completely by using the FAN key to set it to AUTO.
If you found this article helpful, be sure to take a look at the extensive collection of Islandaire manuals and diagrams on our site.