Carrier 48HC*04–14 Service And Maintenance Instructions

13COOLINGUNIT OPERATION AND SAFETY HAZARDFailure to follow this warning could cause personalinjury, death and/or equipment damage.This system uses PuronR refrigerant which hashigher pressures than R--22 and other refrigerants. Noother refrigerant may be used in this system. Gaugeset, hoses, and recovery system must be designed tohandle Puron refrigerant. If unsure about equipment,consult the equipment manufacturer.! WARNINGCondenser CoilThe condenser coil is fabricated with round tube copperhairpins and plate fins of various materials and/or coatings(see Model Number Format in the Appendix to identifythe materials provided in this unit). The coil may beone--row or composite--type two--row. Composite two--rowcoils are two single--row coils fabricated with a singlereturn bend end tubesheet.Condenser Coil Maintenance and CleaningRecommendationRoutine cleaning of coil surfaces is essential to maintainproper operation of the unit. Elimination of contaminationand removal of harmful residues will greatly increase thelife of the coil and extend the life of the unit. Thefollowing maintenance and cleaning procedures arerecommended as part of the routine maintenance activitiesto extend the life of the coil.Remove Surface Loaded FibersSurface loaded fibers or dirt should be removed with avacuum cleaner. If a vacuum cleaner is not available, asoft non--metallic bristle brush may be used. In eithercase, the tool should be applied in the direction of the fins.Coil surfaces can be easily damaged (fin edges can beeasily bent over and damage to the coating of a protectedcoil) if the tool is applied across the fins.NOTE: Use of a water stream, such as a garden hose,against a surface loaded coil will drive the fibers and dirtinto the coil. This will make cleaning efforts moredifficult. Surface loaded fibers must be completelyremoved prior to using low velocity clean water rinse.Periodic Clean Water RinseA periodic clean water rinse is very beneficial for coilsthat are applied in coastal or industrial environments.However, it is very important that the water rinse is madewith a very low velocity water stream to avoid damagingthe fin edges. Monthly cleaning as described below isrecommended.Routine Cleaning of Coil SurfacesPeriodic cleaning with TotalineR environmentally soundcoil cleaner is essential to extend the life of coils. Thiscleaner is available from Replacement ComponentsDivision as part number P902--0301 for a one galloncontainer, and part number P902--0305 for a 5 galloncontainer. It is recommended that all coils, includingstandard aluminum, pre--coated, copper/copper orE--coated coils be cleaned with the Totalineenvironmentally sound coil cleaner as described below.Coil cleaning should be part of the unit’s regularlyscheduled maintenance procedures to ensure long life ofthe coil. Failure to clean the coils may result in reduceddurability in the environment.Avoid use of:S coil brightenersS acid cleaning prior to paintingS high pressure washersS poor quality water for cleaningTotaline environmentally sound coil cleaner isnonflammable, hypo allergenic, non bacterial, and aUSDA accepted biodegradable agent that will not harmthe coil or surrounding components such as electricalwiring, painted metal surfaces, or insulation. Use ofnon--recommended coil cleaners is strongly discouragedsince coil and unit durability could be affected.One--Row CoilWash coil with commercial coil cleaner. It is notnecessary to remove top panel.Two--Row CoilsClean coil as follows:1. Turn off unit power, tag disconnect.2. Remove top panel screws on condenser end of unit.3. Remove condenser coil corner post. See Fig. 16. Tohold top panel open, place coil corner post betweentop panel and center post. See Fig. 17.C08205Fig. 16 -- Cleaning Condenser Coil48HC