Carrier 48GS Operating And Maintaining Manual

Also see for 48GS Guide: Operating and maintaining guide

Contents

Electrical Controls and Wiring — Electrical con-trols are difficult to check without proper instrumentation;therefore, if there are any discrepancies in the operating cycle,contact your dealer and request service.Refrigerant Circuit — The refrigerant circuit is diffi-cult to check for leaks without the proper equipment; there-fore, if inadequate cooling is suspected, contact your localdealer for service.Combustion Area and Vent System — The com-bustion area and vent system should be inspected visuallybefore each heating season. The normal accumulation of dirt,soot, rust, and scale can result in loss of efficiency and im-proper performance if allowed to build up.If your unit makes an especially loud noise when themain burners are ignited, shut down the heating sectionand call your dealer.Proceed as follows to inspect the combustion area and power-venting system of your unit.1. Turn off electrical power and gas supply to your unit.2. Remove burner access panel. (See Fig. 1.)3. Using a flashlight, carefully inspect the burner areas fordirt, soot, rust, or scale. See Fig. 2.If dirt, soot, rust, or scale accumulations are found,call your dealer and do not operate your heating sec-tion.4. When you have completed your inspection, follow thestart-up procedures in this manual to restore your unit tooperation.5. Observe unit heating operation.Components in heat section may be hot after unithas been started up. When observing flame, be care-ful not to get close to or touch heating componentsor serious personal injury may result.Watch the burner flame to see if it is bright blue. If youobserve a suspected malfunction or if the burner flamesare not bright blue, call your dealer.6. Replace burner access panel.Unit Panels — After performing any maintenance or serv-ice on the unit, be sure all panels are fastened securely inplace to prevent rain from entering unit cabinet and to pre-vent disruption of the correct unit airflow pattern.REGULAR DEALER MAINTENANCEIn addition to the type of routine maintenance you mightbe willing to perform, your unit should be inspected regu-larly by a properly trained service technician. An inspection(preferably each year, but at least every other year) shouldinclude the following:1. Inspection of all flue product passages — including theburners, heat exchanger, and flue collector box.2. Inspection of all combustion- and ventilation-air pas-sages and openings.3. Close inspection of all gas pipes leading to and inside ofyour unit.4. Inspection and, if required, cleaning of the condenserand evaporator coils.5. Inspection and, if required, cleaning of the evaporatordrain pan.6. Inspection and cleaning of blower wheel housing andmotor.7. Inspection of all supply-air and return-air ducts for leaks,obstructions, and insulation integrity. Any problems foundshould be resolved at this time.8. Inspection of the unit base to ensure that no cracks, gaps,etc., exist which may cause a hazardous condition.9. Inspection of the unit casing for signs of deterioration.10. Inspection of all electrical wiring and components to as-sure proper connection.11. Inspection for leaks in the refrigerant circuit. Pressure-check to determine appropriate refrigerant charge.12. Inspection of compressor oil level.13. Operational check of the unit to determine working con-ditions. Repair or adjustment should be made at this time.Your servicing dealer may offer an economical service con-tract that covers seasonal inspections. Ask for furtherdetails.Complete service instructions can be found in the unitInstallation, Start-Up and Service Instructions.WARRANTIESUnits 48GS and GX have warranties located at the backof this book. Be sure to read the warranty carefully to de-termine the coverage for your unit.*For accessory filter rack.Fig. 5 — Filter Access Panel — Vertical Supply ShownACCESS PANELFILTER ACCESSPANEL*6