Carrier 48ES---A Owner's Information Manual

Also see for 48ES---A: Owner's information manual Owner's information manual Installation instructions Installation instructions

Contents

4FIRE AND EXPLOSION HAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.1. If the main burners fail to light, or the blower fails tostart, shut down gas heating section and call your dealer forservice.2. Never attempt to manually light the main burners on unitwith a match, lighter, or any other flame. If the electricsparking device fails to light the main burners, refer to thefollowing shutdown procedures, then call your dealer assoon as possible.! WARNINGBurners Gas ValveFlue HoodA09043Fig. 4 -- Gas Heating/Electric Cooling Unit with Access PanelRemovedTo shut off unit gas heat:FIRE, EXPLOSION, ELECTRICAL SHOCKHAZARDFailure to follow this warning could result in personalinjury, death, and/or property damage.Do not turn off the electrical power to unit without firstturning off the gas supply.! WARNINGNOTE: If the unit is being shut down because of a malfunction,call your dealer as soon as possible.Should overheating occur or the gas supply fail to shut off, shutoff the external manual gas valve to the unit before shutting offthe electrical supply. 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 and any gascontrol which has been under water.Refer to Fig. 6 while proceeding with the following steps.1. Set the temperature selector on room thermostat to lowesttemperature setting and set system SWITCH to OFF.2. Close the external manual shutoff valve.3. Turn off the electrical power supply to the unit.4. Remove the control access panel. (See Fig. 3.)5. Move the selector switch on the internal gas valve to theOFF position.6. Replace the control access panel.To start unit electric cooling:Refer to Fig. 7 while proceeding with the following steps.1. Set the temperature selector on room thermostat to highesttemperature setting and set system SWITCH to OFF.2. Close the external manual shutoff valve, if not alreadyclosed.3. Turn ON the electrical power supply to the unit.4. Set system switch to COOL.5. Set the temperature selector on room thermostat slightly be-low the room temperature to start unit.To shut off unit electric cooling:Refer to Fig. 8 while proceeding with the following steps.1. Set the temperature selector on room thermostat to highesttemperature setting and set system SWITCH to OFF.2. Close the external manual shutoff valve, if not alreadyclosed.3. Turn off the electrical power supply to the unit.OPERATING YOUR UNITThe operation of your unit is controlled by the indoor temperaturecontrol (thermostat). You simply adjust the thermostat and itmaintains the indoor temperature at the level you select. Mostthermostats of heating and cooling systems have 3 controls: atemperature control selector, a FAN control, and a SYSTEM orMODE control. Refer to your thermostat owner’s manual for moreinformation.To better protect your investment and to eliminate unnecessaryservice calls, familiarize yourself with the following facts:Cooling ModeWith the SYSTEM control set to COOL, your unit will run incooling mode until the indoor temperature is lowered to the levelyou have selected. On extremely hot days, your unit will run forlonger periods at a time and have shorter “off” periods than onmoderate days.Gas Heat ModeWith the SYSTEM or MODE control of your indoor thermostat setto HEAT, your unit will run in heating mode until roomtemperature is raised to the level you have selected. On cold daysand nights, your system will typically run for longer periods oftime and have shorter “off” periods than on moderate days.MAINTENANCE AND SERVICEThis section discusses maintenance that should be performed onyour system. Most maintenance should be performed by yourdealer. You, as the owner, may wish to handle some minormaintenance for your new unit.Routine MaintenanceAll routine maintenance should be handled by skilled, experiencedpersonnel. Your dealer can help you establish a standard procedure.For your safety, keep the unit area clear and free of combustiblematerials, gasoline, and other flammable liquids and vapors.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). Also, ensure that the return--air ductconnection (s) is physically sound, is sealed to the furnace casing,and terminates outside the space containing the furnace.