Daikin DCC Series Installation Instructions Manual

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Daikin DCC Series Installation Instructions Manual Manual pdf 15 page image

15D EFROST C ONTROLN OTE : DCH models have one stage of mechanical heating. The de-frost accumulation period will start when either first or second stagedefrost thermostat closes. Defrost termination occurs when boththermostats open or the 10 minute cycle has completed.During operation the power to the circuit board is controlled by atemperature sensor, which is clamped to a feeder tube enteringthe outdoor coil. Defrost timing periods of 30,60 and 90 minutesmay be selected by connecting the circuit board jumper to 30, 60and 90 respectively. Accumulation of time for the timing periodselected starts when the sensor closes (approximately 31° F), andwhen the wall thermostat calls for heat. At the end of the timingperiod, the unit’s defrost cycle will be initiated provided the sen-sor remains closed. When the sensor opens (approximately 75° F),the defrost cycle is terminated and the timing period is reset. If thedefrost cycle is not terminated due to the sensor temperature, aten minute override interrupts the unit’s defrost period.MAINTENANCEHIGH VOLTAGE!DISCONNECT ALL POWER BEFORE SERVICING ORINSTALLING THIS UNIT . MULTIPLE POWER SOURCES MAYBE PRESENT . F AILURE TO DO SO MAY CAUSE PROPERTYDAMAGE , PERSONAL INJURY OR DEATH .WARNINGT O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPERINSTALLATION , ADJUSTMENT , ALTERATION, SERVICE ORMAINTENANCE, REFER TO THIS MANUAL . F OR ADDITIONALASSISTANCE OR INFORMATION , CONSULT A QUALIFIED INSTALLER,SERVICE AGENCY OR THE GAS SUPPLIER.WARNINGSHEET METAL PARTS , SCREWS , CLIPS AND SIMILAR ITEMS INHERENTLYHAVE SHARP EDGES , AND IT IS NECESSARY THAT THE INSTALLER ANDSERVICE PERSONNEL EXERCISE CAUTION.CAUTIONThe Self Contained Packaged Air Conditioner and Heat Pump shouldoperate for many years without excessive service calls if the unit isinstalled properly. However it is recommended that the homeownerinspect the unit before a seasonal start up. The coils should befree of debris so adequate airflow is achieved. The return and sup-ply registers should be free of any obstructions. The filters shouldbe cleaned or replaced. These few steps will help to keep the prod-uct up time to a maximum. The Service section that follows shouldhelp in identifying problems if the unit does not operate properly.FILTERSCAUTIONT O PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OFEQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINTBUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIRFILTER INSTALLED IN THE RETURN AIR SYSTEM.Every application may require a different frequency of replacementof dirty filters. Filters must be replaced at least every three (3)months during operating seasons.Dirty filters are the most common cause of inadequate heating orcooling performance. Filter inspection should be made at leastevery two months; more often if necessary because of local condi-tions and usage.Dirty throwaway filters should be discarded and replaced with anew, clean filter.Disposable return air filters are supplied with this unit. See theunit Specification Sheet or Technical Manual for the correct sizeand part number. To remove the filters, remove the filter accesspanel on return side of the unit.CABINET F INISH M AINTENANCEUse a fine grade automotive wax on the cabinet finish to maintainthe finish’s original high luster. This is especially important in in-stallations with extended periods of direct sunlight.CLEAN O UTSIDE C OIL (Q UALIFIED SERVICER O NLY)The coil with the outside air flowing over it should be inspectedannually and cleaned as frequently as necessary to keep the finnedareas free of lint, hair and debris.L UBRICATIONThe fan shaft bearings , the 1 to 2 HP supply fan motors, the con-denser fan motors and compressors are permanently lubricated.FUNCTIONAL P ARTSRefer to the unit Parts Catalog for a list of functional parts. Partsare available from your distributor.TROUBLESHOOTINGTHE FOLLOWING INFORMATION IS FOR USE BY QUALIFIED SERVICEAGENCY ONLY: OTHERS SHOULD NOT ATTEMPT TO SERVICE THISEQUIPMENT.Common Causes of Unsatisfactory Operation of Heat Pump on theHeating Cycle.I NADEQUATE AIR V OLUME T HROUGH INDOOR COILWhen a heat pump is in the heating cycle, the indoor coil is func-tioning as a condenser. The return air filter must always be clean,and sufficient air volume must pass through the indoor coil to pre-vent excessive discharge pressure, and high pressure cut out.