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This position will provide the lowest operating cost. If you purchased one of our thermostats, they have an Intelligent fan mode which continually circulates the air during occupied modes or when you are at home, and can cycle the fan during unoccupied mode or during the night while you sleep to further conserve energy. ON CONTINUOUS FAN OPERATION: With the thermostat fan switch set to “ON”, the indoor fan will not shut off. However, the cooling (AC) or heating (heat pump) systems will still operate as required by room temperatures. This provides continuous air filtering and more even temperature distribution to all conditioned spaces. FAN ONLY OPERATION: On moderate days, usually during spring and fall, when neither heating nor cooling is required, you may want to run only the fan to ventilate, circulate and filter the air in your home or building. Set the comfort control switch to “OFF” and the fan switch to “ON”. Be sure to return the switches to their original positions for normal operation. START-UP The maximum and minimum conditions for operation must be observed to assure a system that will give maximum performance with minimum service. TABLE 1: APPLICATION LIMITATIONS Air Temperature at Outdoor Coil, °F Air Temperature at Indoor Coil, °F Min. Max. Min. Max. DB Cool DB Heat DB Cool DB Heat WB Cool DB Heat WB Cool DB Heat 60 -10 115 75 57 501 72 80 1. Operation below this temperature is permissible for a short period of time, during morning warm-up. The comfort control switch is assumed to be in the “OFF” position. If the main power supply to the outdoor and indoor units is off, turn the appropriate disconnects to the “ON” position. Place the system into operation as follows: 1. Set temperature adjustment to the desired temperature on your thermostat. COOLING - The higher the setting, the lower the amount of energy consumed. Federal Guidelines recommend a setting of 78 °F. HEATING - The lower the setting, the lower the amount of energy con sumed. Federal guidelines recommend a setting of 65 °F or lower. NOTE: If your cooling and heating temperature adjustments are separate, be sure to set both. 2. After considering “Fan Operation Selection” above, select and set the fan operation mode you desire. 3. Move the comfort control switch to the desired mode of operation (Cooling or Heating) found on your particular thermostat. POWER FAILURE When accidents, wind storms, etc. disrupt electrical power supply to your house, switch thermostat to “OFF” position. SYSTEM OPERATION MANUAL CHANGE-OVER THERMOSTAT COOLING YOUR HOME: With the comfort control switch in the “COOL” position, the system will operate as follows: When the indoor temperature rises above the level indicated by the temperature adjustment setting, the system will start. The outdoor unit will operate and the indoor fan will circulate the cooled, filtered air. When the room temperature is lowered to the setting selected, the system will shut off. HEATING YOUR HOME: If your system includes a heating unit and the comfort control switch is in the “HEAT” position, the system will operate as follows: When the indoor temperature drops below the level indicated by the temperature adjustment setting, the system will start. The heating system will operate and the indoor fan will circulate the filtered air. When the room temperature rises to the setting selected, the system will shut off. Whether heating or cooling, the fan will continue to operate if the fan switch was set in the “ON or Intelligent” position. The “AUTO” setting on the fan switch will allow the fan to shut off when your system does. ELECTRONIC THERMOSTAT The computerized electronic thermostat, when programmed, will function automatically to operate the system as follows: When the indoor temperature rises above the higher (COOL) setting, the outdoor unit will operate and the indoor fan will circulate the cooled, filtered air. When the room temperature is lowered to the selected level, the system will shut off. The indoor fan will either shut off or run continuously, depending upon your choice of fan switch setting. When the indoor temperature drops below the lower (HEAT) setting, the heating system will operate, and the indoor fan will circulate the heated, filtered air. When the indoor temperature rises to the selected setting, the system will shut off. The indoor fan will either shut off or run continuously, depending upon your choice of fan switch setting. CARE OF SYSTEM It is strongly recommended that regular periodic preventative maintenance be performed on this equipment. The person most familiar with the equipment in your H.V.A.C. system is a dealer. The dealer can ensure your maintenance program meets the conditions of the Warranty”, maximize the efficiency of the equipment, and service your unit within the federally mandated guidelines with regard to unlawful discharge of refrigerants into the atmosphere. Unitary Products Group 343787-UUM-B-0409 COIL CARE Keep the outdoor unit free of...

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