Carrier COMFORT 50EZ-A Owner's Information Manual

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Carrier COMFORT 50EZ-A Owner's Information Manual Manual pdf 3 page image

3CUT HAZARDFailure to follow this caution may result in personal injury.Sheet metal parts may have sharp edges or burrs. Use careand wear appropriate protective clothing, safety glasses andgloves when handling parts and servicing furnaces.! CAUTIONOPERATING YOUR UNITThe operation of your heat pump system is controlled by theindoor thermostat. You simply adjust the thermostat and itmaintains the indoor temperature at the level you select. Mostthermostats of heat pump systems have 3 controls: a temperaturecontrol selector, a FAN control, and a SYSTEM or MODE control.Refer to your thermostat owner’s manual for more information.To better protect your investment and to eliminate unnecessaryservice calls, familiarize yourself with the following facts:1. During heating, increasing the desired temperature settingmore than 2°F (1.1°C) may cause the supplemental heatersto be turned on for a short period of time to satisfy thedemand. Needless use of the supplementary heat reducespotential energy savings.2. Ice or frost tends to form on the coil during winter heatingoperation. Your unit is designed to automatically melt 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 select temperature.To shut off unit:NOTE: If the unit is being shut down because of a malfunction,call your dealer as soon as possible.1. Set system MODE control to OFF.2. Turn off the electrical power supply to unit.Cooling ModeWith the SYSTEM or MODE control set to COOL, your unit willrun in cooling mode until the indoor temperature is lowered to thelevel you have selected. On extremely hot days, your unit will runfor longer periods at a time and have shorter “off” periods than onmoderate days.Heating ModeWith the SYSTEM or MODE control set to HEAT, your unit willrun in heating mode until the room temperature is raised to thelevel you have selected. Of course, your unit will run for longerperiods to maintain a comfortable environment on cooler days andnights than on moderate ones.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 onthe supplemental heat, as needed, in order to maintain the level ofcomfort you have selected.When your heat pump needs additional heat to keep youcomfortable your thermostat will turn on the supplemental heat (ifequipped).Defrost ModeWhen your unit is providing heat to your home or office and theoutdoor temperature drops below 45°F (7.2°C), moisture maybegin to freeze on the surface of the coil. If allowed to build up,this ice would impede airflow across the coil and reduce theamount of heat absorbed from the outside air. So, to maintainenergy--efficient operation, your unit has an automatic defrostmode.The defrost mode starts at a preset time interval of 60 minutes,although, it may be reset to 30, 90 or 120 minutes. Defrost willstart at the preset time only if the ice is sufficient to interfere withnormal heating operation.After the ice is melted from the coil, or after a maximum of 10minutes in defrost mode, the unit automatically switches back tonormal heating operation.Do not be alarmed if steam or fog appears at the outdoor unitduring defrost mode. Water vapor from the melting ice maycondense into a 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. Thisis normal for these weather conditions. Do not attempt to removethe ice from the unit grille. This condition will not affect the properfunction of the unit and will clear within a few days.Emergency Heating ModeIn the event of primary unit heat failure, the emergency heat modeallows your supplemental heating source to keep your home oroffice warm until your unit can be serviced. Contact your dealer inthe event of primary unit heat failure.MAINTENANCE AND SERVICEThis section discusses maintenance that should be performed byyour dealer and care you, as the owner, may wish to handle foryour new unit.Routine MaintenanceAll routine maintenance should be handled by skilled, experiencedpersonnel. Your dealer can help you establish a standard procedure.To assure proper functioning of the unit, flow of condenser airmust not be obstructed from reaching the unit. Clearance from thetop of the unit is 48 in. (1219 mm). Clearance of at least 36 in.(914 mm) is required on sides except the power entry side (42 in.[1067 mm] clearance) and the duct side (12 in. [305 mm]minimum clearance).Maintenance and Care for the Equipment OwnerBefore proceeding with those things you might want to maintainyourself, please carefully consider the following:FIRE, EXPLOSION, ELECTRICAL SHOCK, CUTHAZARDFailure to follow this warning could result in personalinjury, death or property damage.1. TURN OFF ELECTRICAL POWER TO YOUR UNITBEFORE SERVICING OR PERFORMINGMAINTENANCE AND INSTALL A LOCK--OUTTAG.2. When removing access panels or performingmaintenance functions inside your unit, be aware ofsharp sheet metal parts and screws. Although special careis taken to reduce sharp edges to a minimum, beextremely careful when handling parts or reaching intothe unit.! WARNINGAir FiltersThe air filter(s) should be checked every 3 or 4 weeks and changedor cleaned whenever it becomes dirty. Dirty filters produceexcessive stress on the blower motor and can cause the motor tooverheat and shut down.This unit must have an air filter in place before it can be operated.These filters should be located in at least one of two places. In

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