Carrier Infinity 50DT Owner's Information Manual

Also see for Infinity 50DT: Installation instructions

SAFETY CONSIDERATIONSInstallation and servicing of this equipment can be hazardous due tomechanical and electrical components. Only trained and qualifiedpersonnel should install, repair, or service this equipment.Untrained personnel can perform basic maintenance functions suchas cleaning and replacing air filters. All other operations must beperformed by trained service personnel. When working on thisequipment, observe precautions in the literature, on tags, and on la-bels attached to or shipped with the unit and other safety precautionsthat may apply.Follow all safety codes. Installation must be in compliance with lo-cal and national building codes. Wear safety glasses, protectiveclothing, and work gloves. Have fire extinguisher available. Readthese instructions thoroughly and follow all warnings or cautionsincluded in literature and attached to the unit.Recognize safety information. This is the safety-alert symbol/_kWhen you see this symbol on the unit and in instructions or manuals,be alert to the potential for personal injury.Understand these signal words: DANGER, WARNING. and CAU-TION. These words are used with the safety-alert symbol. DAN-GER identifies the most serious hazards which will result in severepersonal injury or death. WARNING signifies hazards which couldresult in personal injury or death. CAUTION is used to identify un-safe practices which may result in minor personal injury or productand property damage. NOTE is used to highlight suggestions whichwill result in enhanced installation, reliability, or operation.Note: Installer: This manual should be left with the equipment user.FIRE, EXPLOSION HAZARDFailure to follow this warning could result in death, personalinjury and/or property damage.Do not store or use gasoline or other flammable vapors andliquids in the vicinity of this or any other appliance.FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injury,death or property damage.Do not use this unit if any part has been underwater.Immediately call a qualified service technician to inspect theunit and to replace any part of the control system which hasbeen underwater.ELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.Before performing recommended maintenance, be sure themain power switch to unit is turned off.OPERATING YOUR UNITThe operation of your heat pump system is controlled by the Infin-ity "' User Interface (UI). You may adjust the temperature manuallythrough the UI or program the UI for automatic control. See UImanual for detailed instructions.To better protect your investment and to eliminate unnecessary ser-vice calls, familiarize yourself with the following facts:1. During heating, increasing the desired temperature settingmore than 2°F may cause the supplemental heaters to beturned on for a short period of time to satisfy the demand.Needless use of the supplementary heat reduces potentialenergy savings.2. Ice or frost tends to form on the coil during winter heatingoperation. Your unit is designed to automatically nmlt theice. When in this defrost cycle, it is normal for steam orfog to rise from the outdoor unit, and for water to drainfrom the outside of unit. Do not be alarmed!To start the unit:1. Turn on the electrical power supply to unit.2. Set MODE control to desired mode and the User Interfacefor automatic control.To shut off unit:Note: If the unit is being shut down because of a malfunction, callyour dealer as soon as possible.1. Set system MODE control to OFF.2. Turn off the electrical power supply to unit.Cooling ModeWith the UI control set to COOL, your unit will run in cooling modeuntil the indoor temperature is lowered to the level you have se-lected. On extremely hot days, your unit will run for longer periodsat a time and have shorter "off" periods than on moderate days.Heating ModeWith the UI control set to HEAT, your unit will run in heating modeuntil the room temperature is raised to the level you have selected.Of course, your unit will run for longer periods to maintain a com-fortable environment on cooler days and nights than on moderateones.Supplemental HeatYour unit is your primary heating source. Your system may also beequipped with a supplemental heating source such as electric heat.On cold days and nights, your system will automatically turn on thesupplemental heat, as needed, in order to maintain the level of com-fort you have selected.Defrost ModeWhen your unit is providing heat to your home or office and the out-door temperature drops below 45°F, moisture may begin to freezeon the surface of the coil. If allowed to build up, this ice would im-pede airflow across the coil and reduce the amount of heat absorbedfrom the outside air. So, to maintain energy-efficient operation,your unit has an automatic defrost mode.The defrost mode starts at a preset time interval of 30 minutes, al-though, it may be reset to 60, 90 or 120 minutes. Defrost will startat the preset time only if the ice is sufficient to interfere with normalheating operation.After the ice is melted from the coil. or after a maximum of 10 min-utes in defrost mode, the unit automatically switches back to normalheating operation.Do not be alarmed if steam or fog appears at the outdoor unit duringdefrost mode. Water vapor from the melting ice may condense intoa mist in the cold outside air.During certain weather conditions such as heavy snow and freezingrain it is not uncommon for ice to build up on the unit grille. This is

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