OUTSIDE AIR - Push FAN ONLY button and slide vent lever to OPEN position.
OFF - The OFF button terminates unit operation.
FAN ONLY - Push button for air circulation without heating or cooling.
HIGH HEAT OR HIGH COOL - Push button, and rotate
temperature knob to desired comfort level. This function provides maximum heating or cooling, and is recommended to raise or lower the room temperature quickly. Once the occupied space has reached the desired comfort level, this setting is not required. See Finding Temperature Setting section below for more information.
LOW HEAT OR LOW COOL - Push button and rotate temperature knob to desired comfort level. This function provides minimum heating or cooling with maximum dehumidification.
FINDING TEMPERATURE SETTING FOR YOUR COMFORT LEVEL - Set temperature knob between number 5 and number 6. Push High or Low Heat or Cool button and allow unit to run 15 to 30 minutes. If room is not comfortable, turn knob one number at a time. When room is comfortable, keep control knob at that position.
The following controls are located on the right side of the chassis. (See Figure 20.) To obtain access to operating controls, remove the unit front panel as shown on page 2.
IMPORTANT: When unit is first started, high humidity conditions can cause condensation to form on grille. Keep doors and windows closed. Room humidity decreases and moisture evaporates.
FAN CYCLE SWITCH - (Not available on RC units.) This allows the fan to operate in two modes:
CON - This setting allows the fan to run continuously, circulating air even when the temperature setting has been satisfied. This switch helps to maintain the room temperature closer to the thermostat setting. Use this switch position when maximum comfort is desired.
CYC - This setting allows the fan to cycle on and off with the compressor during heating or cooling. The fan stops when the temperature setting is satisfied. This results in longer unit off-time and wider variations in room temperature and humidity.
OUTDOOR THERMOSTAT (52SQ HEAT PUMP UNITS ONLY) - If the set screw is left at the factory setting (in the fully clockwise position), the unit will operate in the reverse cycle heating mode. The control is the defrost thermostat in this mode. The 52SQ thermostat-sensing capillary is located between the fins of the outdoor coil. When the temperature at the capillary reaches 25° F, the outdoor frost thermostat closes, shutting off the compressor and energizing the electric heater. The electric heater remains on until the temperature at the outdoor thermostat capillary reaches 40° F; then the electric heater is shut off and the compressor is energized. To set unit to operate in electric heat mode only, turn the sets crew to the fully counterclockwise position. Once in electric heat mode, the compressor is disabled for heating and cooling.
VENT CONTROL - See Adjustments on for vent operating information.
