Daikin WAA Installation And Maintenance Manual

Daikin WAA Installation And Maintenance Manual Manual pdf 25 page image

www.DaikinApplied.com 25 IM 447-11Maintenance1. Filter changes are required at the regular intervals.The time period between changes will depend uponthe project requirements. Some applications suchas motels, produce a lot of lint from carpeting andlinen changes, and will require more frequent filterchanges. It is suggested that the filter be checkedat 60 day intervals for the first year until experienceis acquired. If light cannot be seen through the filterwhen held up to sunlight or a bright light, it should bechanged. A more critical standard may be desirable.2. The condensate drain pan should be checkedannually and cleaned and flushed as required.Note: Mark IV/AC equipment has a condensate over-flow control device. In cooling, if compressor willnot operate, it may be due to unit compressorlockout on condensate overflow.3. Recording of performance measurement of volt ampsand water temperature differences (both heating andcooling) is recommended. A comparison of loggeddata with start-up and other annual data is useful asan indicator of general equipment condition.4. Inspect and clean air coil using a soft bristle brushand a vacuum as neccessary.5. Inspect condensate drain lines twice per year andclean as needed to prevent build-up lint and otherparticles that could cause overflow.6. Periodic lockouts almost always are caused by airor water problems. The lockout (shutdown) of theconditioner is a normal protective result. Check fordirt in the water system, water flow rates, watertemperature, airflow rates (may be dirty filter),and air temperatures. If the lockout occurs in themorning following a return from night setback,entering air below machine limits may be the cause.7. When checking unit operation, it is important togather the correct information.a. Take voltage reading.b. Amp reading in both cooling and heating modeoperation. Fan and compressor Amp readingsshould be recorded annually and should not begreater than 10% over nameplate rating.c. Water temperature difference in both coolingand heating mode.d. Air temperature difference in both coolingand heating mode. Air temperature difference incooling mode should include both wet and drybulb temperatures.8. Also record model, catalog, and serial numbers.NOTICEIt is not neccesary or recommended to check refrigerantpressures on a regular schedule. They should only bechecked if a water and air side evaluation would requirefurther evaluation of the unit performance.