Daikin DCC048 SERIES Installation Instructions Manual

Contents

Daikin DCC048 SERIES Installation Instructions Manual Manual pdf 8 page image

8F AILURE OF UNIT DUE TO OPERATION ON IMPROPER LINE VOLTAGEOR WITH EXCESSIVE PHASE UNBALANCE CONSTITUTES PRODUCTABUSE AND IS NOT COVERED BY THE WARRANTY . IT MAY CAUSESEVERE DAMAGE TO THE UNIT ELECTRICAL COMPONENTS .WARNINGAreas Without Convenience OutletIt is recommended that an independent 115V power source bebrought to the vicinity of the roof top unit for portable lights andtools used by the service mechanic.NOTE: Refer to local codes for requirements. These outlets canalso be factory installed.U NITS INSTALLED ON R OOF T OPSMain power and low voltage wiring may enter the unit throughthe condenser end or through the roof curb. Install conduit con-nectors at the desired entrance locations. External connectors mustbe weatherproof. All holes in the unit base must be sealed (in-cluding those around conduit nuts) to prevent water leakage intobuilding. All required conduit and fittings are to be field supplied.Supply voltage to roof top unit must not vary by more than 10% ofthe value indicated on the unit’s data plate. Phase voltage unbal-ance must not exceed 2%. Contact your local power company forcorrection of improper voltage or phase unbalance.HIGH VOLTAGE ENTRANCELOW VOLTAGE ENTRANCE1:430 1/4”*12 3/8”(REMOVE PLUG)* (6 Ton - 34 1/4”)41/2”47 1/2” 7 1/2”POWER THRUTHE CURB3.5 DIA.RETURNSUPPLYELECTRICAL ENTRANCE AND THRU CURBL OW V OLTAGE CONTROL W IRING1. A 24V thermostat must be installed for unit operation. Itmay be purchased with the unit or field -supplied.Thermostats may be programmable or electromechanicalas required.2. Locate thermostat or remote sensor in the conditionedspace where it will sense average temperature. Do notlocate the device where it may be directly exposed tosupply air, sunlight or other sources of heat. Followinstallation instructions packaged with the thermostat.3. Use #18 AWG wire for 24V control wiring runs notexceeding 75 feet. Use #16 AWG wire for 24V control wiringruns not exceeding 125 feet. Use #14 AWG wire for 24Vcontrol wiring runs not exceeding 200 feet. Low voltagewiring may be National Electrical Code (NEC) Class 2 wherepermitted by local codes.4. Route thermostat wires from sub-base terminals to theunit. Control wiring should enter through the condenserpanel opening indicated in “Electrical Entrance” figure.Connect thermostat and any accessory wiring to lowvoltage terminal block TB1 in the main control box.NOTE: Field-supplied conduit may need to be installed dependingon unit/curb configuration. Use #18 AWG solid conductor wirewhenever connecting thermostat wires to terminals on sub-base.DO NOT use larger than #18 AWG wire. A transition to #18 AWGwire may be required before entering thermostat sub-base.NOTE: Refer to unit wiring diagrams for thermostat hookups.CIRCULATING AIR AND FILTERSD UCTWORKThe supply duct from the unit through a wall may be installed with-out clearance. However, minimum unit clearances must be main-tained (see “Clearances” section). The supply duct should be pro-vided with an access panel large enough to inspect the air cham-ber downstream of the heat exchanger. A cover should be tightlyattached to prevent air leaks.Ductwork dimensions are shown in the roof curb installationmanual.If desired, supply and return duct connections to the unit may bemade with flexible connections to reduce possible unit operatingsound transmission.CONDENSATE DRAIN CONNECTIONCONDENSATE D RAIN C ONNECTIONA 3/4” female NPT drain connection is supplied on the end of theunit and bottom of the drain pan for condensate piping. An exter-nal trap must be installed for proper condensate drainage.