Daikin DCC090 Series Service Instructions Manual Download | Manualshive

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This manual is to be used by qualified, professionally trained HVAC
technicians only. Daikin does not assume any responsibility for property
damage or personal injury due to improper service procedures or services
performed by an unqualified person.

RSDX6412006r1

November 2016

DCC Cooling/DCH Heat Pumps

Commercial Package Units

with R-410A Refrigerant

4 - 6 Tons & Accessories

Service Instructions

Copyright © 2015

-

2016

Not for installation in the United States or Canada. This unit is for export only.

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Summary of Contents for DCC090 Series

Page 1: ... or personal injury due to improper service procedures or services performed by an unqualified person RSDX6412006r1 November2016 DCC Cooling DCH Heat Pumps Commercial Package Units with R 410A Refrigerant 4 6 Tons Accessories Service Instructions Copyright 2015 2016 Not for installation in the United States or Canada This unit is for export only ...

Page 2: ...3 856 1821 Not a technical assistance line for dealers Outside the U S call 1 713 861 2500 Not a technical assistance line for dealers Your telephone company will bill you for the call IMPORTANTINFORMATION 2 3 PRODUCTIONIDENTIFICATION 4 6 PRODUCTDESIGN 7 10 SYSTEMOPERATION 11 16 SCHEDULEDMAINTENANCE 17 TROUBLESHOOTINGCHARTS 18 SERVICINGTABLEOFCONTENTS 19 SERVICING 20 39 UNITWIRINGDIAGRAMS 40 ONLY ...

Page 3: ...e cover is not properly in place a venting terminal may discharge a combination of a hot lubricating oil and refrigerant b flammable mixture if system is contaminated with air inastreamofspraywhichmaybedangeroustoanyoneinthe vicinity Death or serious bodily injury could occur Under no circumstances is a hermetic compressor to be electrically energized and or operated without having the terminal pr...

Page 4: ...Tons 120 10 Tons 060 5 Tons 180 15 Tons 072 6 Tons 240 20 Tons B Belt Drive 090 7 Tons D Direct Drive Nominal Heating Capacity Gas Electric A C H P Factory Installed Electric Heat 180 180 000 BTU h XXX No Heat 030 30 kW 1 208 230 1 60 United States 4 460 3 60 United States 300 300 000 BTU h 016 15 kW 045 44 kW 3 208 230 3 60 United States 5 400 3 50 Russia Daikin Brand 350 350 000 BTU h 6 400 3 60...

Page 5: ...aikin Commercial Package Heat Pump Multiposition heat pump units 400V 3 Phase 60 Hz Direct Drive Initial release of Daikin branded models DCH048XXX6DXXXAD DCH060XXX6DXXXAC Daikin Commercial Package Heat Pump Multiposition heat pump units 400V 3 Phase 60 Hz Direct Drive with Phase Monitor DCH072XXX6BXXXAC Daikin Commercial Package Heat Pump Multiposition heat pump units 400V 3 Phase 60 Hz Direct Dr...

Page 6: ...Direct Drive Initial release of 4 5 Ton Daikin branded models DCC 048 060 XXXBDXXXAA Daikin Commercial Package Cooler Multiposition cooling 400V 3 Phase 60 Hz Direct Drive Initial release of Daikin branded models with SASO level 2 regulations DCC 048 060 XXX6DXXXAC Daikin Commercial Package Cooler Multiposition cooling 400V 3 Phase 50 Hz Direct Drive with Phase Monitor DCC072XXX6BXXXAC Daikin Comm...

Page 7: ...If used do not allow the econo mizer manualfreshairdamper motorizedfreshairdamper to become blocked by snow or debris In some climates or locations it may be necessary to elevate the unit to avoidtheseproblems Whentheunitisheating thetemperatureofthereturnair entering the unit must be a minimum of 55 F GROUND LEVEL INSTALLATIONS ONLY When the unit is installed on the ground adjacent to the buildin...

Page 8: ...tesupplyand returnductopeningareasasdamagetotheunitmightoccur NOTE The unit and curb accessories are designed to allow vertical duct installation before unit placement Duct installation after unit placement is not recommended ALL CURBS LOOK SIMILAR TO AVOID INCORRECT CURB POSITIONING CHECK JOB PLANS CAREFULLY AND VERIFY MARKINGS ON CURB ASSEMBLY INSTRUCTIONS MAY VARY IN CURB STYLES AND SUPERSEDES ...

Page 9: ... on unit for details Main power wiring should be sized for the minimum wire ampacity shown on the unit s database Size wires in accordance with the ampacity tables in Article 310 of the NationalElectricalCode Iflongwiresarerequired itmaybe necessary to increase the wire size to prevent excessive voltage drop Wires should be sized for a maximum of 3 voltagedrop CAUTION TO AVOID PROPERTY DAMAGE OR P...

Page 10: ...ipped LOW VOLTAGE CONTROL WIRING 1 A 24V thermostat must be installed for unit operation It may be purchased with the unit or field supplied Ther mostatsmaybeprogrammableorelectromechanicalas required 2 Locate thermostat or remote sensor in the conditioned space where it will sense average temperature Do not locate the device where it may be directly exposed to supply air sunlight or other sources...

Page 11: ...al Package Cooling or Package Gas RestrictorOrificeAssemblyinCoolingOperation In the cooling mode the orifice is pushed into its seat forcing refrigerant to flow through the metered hole in the center of the orifice DCC XXX XXX ...

Page 12: ...SYSTEM OPERATION 12 Typical Heat Pump System in Cooling Indoor Coil Accumulator Outdoor Coil Reversing Valve Energized Indoor Coil Accumulator Outdoor Coil Reversing Valve De Energized DCH XXX XXX ...

Page 13: ...leaning is neces sary to prevent this build up from plugging the drain STARTUP ADJUSTMENTS AND CHECKS HIGH VOLTAGE OND THE FRAME OF THIS UNIT TO THE BUILDING ELECTRICAL GROUND BY USE OF THE GROUNDING TERMINAL PROVIDED OR OTHER ACCEPTABLE MEANS DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT TO AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK B WARNING TO PREVENT PROPERTY DAMAGE...

Page 14: ...laceajumperwireacrossterminals R and G at TB1 terminal block Close disconnect switch evaporator fan motor will operate so RPM can be checked For gas heat units the airflow must be adjusted so that the air temperature rise falls within the ranges given stated on Data Plate EVAPORATOR FAN ROTATION CHECK THREE PHASE MODELS ONLY Checkthatfanrotatesclockwisewhenviewedfromthedrive side of unit and in ac...

Page 15: ...operates properly NOTE Ifoutdoorthermostatsareinstalledtheoutdoor ambient must be below the set point of these thermo stats for the heaters to operate It may be necessary to jumper these thermostats to check heater operation if outdoor ambient is mild 14 For thermostats with emergency heat switch return to step 11 The emergency heat switch is located at the bottomofthethermostat Movetheswitchtoeme...

Page 16: ...to a feeder tube enteringtheoutdoorcoil Defrosttimingperiodsof30 60and 90 minutes may be selected by connecting the circuit board jumper to 30 60 and 90 respectively Accumulation of time for the timing period selected starts when the sensor closes approximately31 F andwhenthewallthermostatcallsfor heat At the end of the timing period the unit s defrost cycle will be initiated provided the sensor r...

Page 17: ...Manual 14 Check condenser fans and tighten set screws FILTERS CAUTION TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT BUILD UP ON INTERNAL PARTS NEVER OPERATE UNIT WITHOUT AN AIR FILTER INSTALLED IN THE RETURN AIR SYSTEM Everyapplicationmayrequireadifferentfrequencyofreplace ment of dirty filters Filters must be replaced at least eve...

Page 18: ...tacts S 7 Open Control Circuit Test Control Circuit with Voltmeter S 4 Low Voltage Test Voltage S 1 Faulty Evap Fan Motor Repair or Replace S 16 Shorted or Grounded Fan Motor Test Motor Windings S 16 Improper Cooling Anticipator Check Resistance of Anticipator S 3B Shortage of Refrigerant Test For Leaks Add Refrigerant S 101 103 Restricted Liquid Line Remove Restriction Replace Restricted Part S 1...

Page 19: ...Checking Fan Blower Motor Windings PSC Motors 26 S 16D Checking EEM Motors 26 S 17 Checking Compressor Windings 27 S 17A ResistanceTest 27 S 17B GroundTest 27 S 17D OperationTest 28 S 18 Testing Crankcase Heater optional item 28 S 18A CrankcaseHeaterThermostat 28 S 21 Checking Reversing Valve Solenoid 28 S 24 Testing Defrost Control 29 S 25 TestingDefrostThermostat 29 S 50 Checking Heater Limit Co...

Page 20: ...voltage tabulation as shown If the voltage falls below the minimum voltage checkthelinewiresize Longrunsofundersizedwirecan causelowvoltage Ifwiresizeisadequate notifythelocal power company in regards to either low or high voltage Voltage Min Max 208 230 198 253 400 360 440 460 437 506 575 546 604 Unit Supply Voltage Three phase units require a balanced 3 phase power supply to operate If the perce...

Page 21: ...air or replace as necessary S 3B COOLING ANTICIPATOR The cooling anticipator is a small heater resistor in the thermostat During the off cycle it heats the bimetal elementhelpingthethermostatcallforthenextcoolingcycle This prevents the room temperature from rising too high before the system is restarted A properly sized anticipator should maintain room temperature within 1 1 2 to 2 degree range Th...

Page 22: ...NTACTOR CONTACTS SINGLEPHASE HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death 1 Disconnectthewireleadsfromtheterminal T sideofthe contactor 2 With power ON energize the contactor VOLT OHM METER T1 T2 L1 L2 CC Ohmmeter for testing holding coil Voltmeter for testing con...

Page 23: ...oard for single phase gas models For3phaseandbeltdrivemodels theprocedurefortesting the fan relay contacts will be the same as checking the compressor contactor contacts See section S 8 DCC DCH TheElectronicBlowerTimeDelayRelayisusedonPSCand beltdrivenmodels HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause p...

Page 24: ...proximately22PSIG Itwillautomaticallycut in close at approximately 50 PSIG Test for continuity using a VOM and if not as above replace the control S 12 CHECKING HIGH PRESSURE CONTROL HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death The high pressure control senses the...

Page 25: ...type rather than metallized polypropylene as used in the run capacitor A switching device must be wired in series with the capacitor to remove it from the electrical circuit after the compressor starts to run Not removing the start capacitor will overheat the capacitor and burn out the compressor windings These capacitors have a 15 000 ohm 2 watt resistor wired acrossitsterminals Theobjectoftheres...

Page 26: ...icable 2 Check the continuity between each of the motor leads 3 Touch one probe of the ohmmeter to the motor frame ground and the other probe in turn to each lead Ifthewindingsdonottestcontinuousorareadingisobtained from lead to ground replace the motor S 16D CHECKING EEM ENERGY EFFICIENT MOTOR MOTORS Applies only to units with EEM Motors The EEM Motor is a one piece fully encapsulated 3 phase bru...

Page 27: ...ureandduringservicing To reduce the possibility of external ignition all open flame electricalpower andotherheatsourcesshouldbe extinguished or turned off prior to servicing a system S 17A RESISTANCE TEST Each compressor is equipped with an internal overload Thelinebreakinternaloverloadsensesbothmotoramperage andwindingtemperature Highmotortemperatureoramper age heats the disc causing it to open b...

Page 28: ...ure HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death 1 Remove unit wiring from disconnect switch and wire a test cord to the disconnect switch NOTE Thewiresizeofthetestcordmustequalthelinewire size and the fuse must be of the proper size and type 2 Withtheprotectivete...

Page 29: ...across the terminals DFT and R at defrost control board 2 Connectjumperacrosstestpinsondefrostcontrolboard 3 Set thermostat to call for heating System should go into defrost within 21 seconds 4 Immediately remove jumper from test pins 5 Using VOM check for voltage across terminals C O Meter should read 24 volts 6 Using VOM check for voltage across fan terminals DF1 andDF2ontheboard Youshouldreadli...

Page 30: ...relementisprotectedwithanautomatic rest limit control connected in series with each element to prevent overheating of components in case of low airflow This limit control will open its circuit at approximately 150 F to 160 F and close at approximately 110 F WARNING Disconnect ALL power before servicing 1 Remove the wiring from the control terminals 2 Using an ohmmeter test for continuity across th...

Page 31: ...he vacuum in the system NOTE Neverusethesystemcompressorasavacuumpump or run when under a high vacuum Motor damage could occur Do not front seat the service valve s with the compressor open with the suction line of the comprssor closed or severely restricted WARNING 1 Connectthevacuumpump vacuumtightmanifoldsetwith high vacuum hoses thermocouple vacuum gauge and charging cylinder as shown 2 Startt...

Page 32: ...erant in the charging cylinder hose and will definitely have liquid in the liquid hose Reseat the liquid line core Slowly open the high side manifold valve and transfertheliquidrefrigerantfromtheliquidlinehoseand chargingcylinderhoseintothesuctionservicevalveport CAREFUL Watch so that liquid refrigerant does not enter the compressor Final Charge Adjustment The outdoor temperature must be 60 F or h...

Page 33: ...erant gas is considered superheated when its tem perature is higher than the saturation temperature corre spondingtoitspressure Thedegreeofsuperheatequalsthe degrees of temperature increase above the saturation tem perature at existing pressure See Temperature Pressure Chart CAUTION To prevent personal injury carefully connect and disconnect manifold gauge hoses Escaping liquid refrigerant can cau...

Page 34: ... 60 8 6 162 0 57 0 264 0 87 4 366 0 110 4 468 0 129 0 600 0 149 0 62 10 0 164 0 57 7 266 0 87 9 368 0 110 8 470 0 129 3 604 0 149 5 64 11 3 166 0 58 4 268 0 88 4 370 0 111 2 472 0 129 7 608 0 150 1 66 12 6 168 0 59 0 270 0 88 9 372 0 111 6 474 0 130 0 612 0 150 6 68 13 8 170 0 59 8 272 0 89 4 374 0 112 0 476 0 130 3 616 0 151 2 70 15 1 172 0 60 5 274 0 89 9 376 0 112 4 478 0 130 7 620 0 151 7 72 1...

Page 35: ...80 78 308 90 88 86 84 82 80 317 92 90 88 86 84 82 326 94 92 90 88 86 84 335 96 94 92 90 88 86 345 98 96 94 92 90 88 354 100 98 96 94 92 90 364 102 100 98 96 94 92 374 104 102 100 98 96 94 384 106 104 102 100 98 96 395 108 106 104 102 100 98 406 110 108 106 104 102 100 416 112 110 108 106 104 102 427 114 112 110 108 106 104 439 116 114 112 110 108 106 450 118 116 114 112 110 108 462 120 118 116 114...

Page 36: ... evacuate and recharge S 113 OVERCHARGE OF REFRIGERANT An overcharge of refrigerant is normally indicated by an excessively high head pressure Anevaporatorcoil usinganexpansionvalvemeteringdevice willbasicallymodulateandcontrolafloodedevaporatorand prevent liquid return to the compressor An evaporator coil using a fixed orifice restrictor device flowrator metering device could allow refrigerant to...

Page 37: ...or a minimum of twelve 12 hours and recheck the pressure drop across the drier Pressure drop should not exceed 6 PSIG 7 Continue to run the system for several days repeatedly checking pressure drop across the suction line drier If the pressure drop never exceeds the 6 PSIG the drier has trapped the contaminants Remove the suction line drier from the system 8 If the pressure drop becomes greater th...

Page 38: ...URE RISE S 205 CHECKING BELT TENSION NOTE Sectiononhighstatictablesmayrequireafieldmotor change BELT DRIVE MODELS ONLY TENSION AND ALIGNMENT ADJUSTMENT Check drive for adequate run in belt tension Correct belt tension is very important A belt that is loose will have a substantiallyshorterlife andabeltthatistootightmaycause prematuremotorandbearingfailure Correctbelttensionon theseunitscanbechecked...

Page 39: ...checkhasbeen made S 207 MOTOR SHEAVE ADJUSTMENT VL VM 2VP VARIABLE PITCH KEY TYPE MOTOR SHEAVES Thedrivinganddrivenmotorsheavesshouldbeinalignment with each other and the shafts parallel VL VM SHEAVES ADJUSTMENT 1 Loosen set screw B using a 5 32 Allen key 2 Making half or full turns from closed position adjust sheavepitchdiameterfordesiredspeed DONOTOPEN MORETHANFIVEFULLTURNS 3 Tighten set screw B...

Page 40: ...40 DCC COMMERCIAL 3 6 Ton PackagedAir Conditioner Unit WIRING DIAGRAMS ...

Page 41: ...GINAL AT LEAST 105 C USE COPPER CONDUCTOR ONLY 2 TO CHANGE EVAPORATOR MOTOR SPEED MOVE WHITE AND YELLOW LEADS FROM 3 AND 4 TO 4 AND 5 IF BOTH LEADS ARE ENERGIZED THE HIGHER SPEED SETTING IS USED 3 USE COPPER CONDUCTORS ONLY USE N E C CLASS 2 WIRE 400 YL RD BK YL BK BK WH LPS YL PK GR OR WH BR PU YL 5 1 OR OR O LOW VOLTAGE LINE VOLTAGE FIELD WIRING LOW VOLTAGE FACTORY WIRING HIGH VOLTAGE BL RD OR Y...

Page 42: ...A NOTES 1 REPLACEMENT WIRE MUST BE SAME SIZE AND TYPE INSULATION AS ORIGINAL AT LEAST 105 C USE COPPER CONDUCTOR ONLY 2 TO CHANGE EVAPORATOR MOTOR SPEED MOVE WHITE AND YELLOW LEADS FROM 3 AND 4 TO 4 AND 5 IF BOTH LEADS ARE ENERGIZED THE HIGHER SPEED SETTING IS USED 3 USE COPPER CONDUCTORS ONLY USE N E C CLASS 2 WIRE 400 YL RD BK YL BK BK WH BL LPS YL PK GR OR WH BR PU YL 5 1 OR OR O LOW VOLTAGE LI...

Page 43: ...DELAY EVAPORATOR MOTOR RELAY RELAY EVAPORATOR MOTOR FAN CAPACITOR EQUPIMENT GROUND HIGH PRESSURE SWITCH HIGH VOLTAGE DEFROST RELAY LOW PRESSURE SWITCH LOW VOLTAGE DEFROST RELAY LOW VOLTAGE JUNCTION BOX POWER DISTRUBTION BLOCK FEMALE PLUG CONNECTOR PHASE MONITOR REVERSING VAVLE COIL RUN CAPACITOR FOR COMPRESSOR AND FAN TERMINAL BLOCK 24V SIGNAL TRANSFORMER TR 4 LVJB 5 PLF 2 BL BK 5 BC YL COMP SEE U...

Page 44: ...44 DCH COMMERCIAL 3 6 Ton Packaged Heat Pump Unit WIRING DIAGRAMS ...

Page 45: ...WIRE 4 ECONOMIZER PLUG LOCATED IN TH E RETURNAIR COMPARTMENT REMOVEMALEPLUG AND ATTACH FEMALEPLUG TO ECONOMIZER ACCESSORY 5 6 3 1 2 SEE NOTE 4 LOW VOLTAG E LINE VOLTAG E FIEL D WIRING LOW VOLTAG E FACTO RY WIRING HIGH VOLTAG E BL RD OR Y1 YL W BL G R OR W NO ECONOMIZER G OR YL RD Y2 PK WH W R RD WH GR C O R YL O GR G WH WITH ECONOMIZE R OPTION C GR THERMOSTAT FIELD W IRING BL C O 2 STAGECOOLING TB...

Page 46: ...VDR PLF PM RVC RCCF TB1 TR HVDR 6 T1 C L1 EM CHR CM COMPONENT LEGEND R F 6 1 DF2 P L F 1 G T2 NOTES 1 REPLACEMENT WIRE MUST BE SAME SIZE AND TYPE INSULATION AS ORIGINAL AT LEAST 105 C USE COPPER CONDUCTOR ONLY 2 USE COPPER CONDUCTORS ONLY USE N E C CLASS 2 WIRE 3 ECONOMIZER PLUG LOCATED IN THE RETURN AIR COMPARTMENT REMOVE MALE PLUG AND ATTACH FEMALE PLUG TO THE ECONOMIZER ACCESSORY 4 CRANKCASE HE...

Page 47: ... personal injury due to improper service procedures or services performed by an unqualified person Copyright 2015 2016 RSDX6412007r2 November2016 DCC Cooling DCH Heat Pumps Commercial Package Units with R 410A Refrigerant 7 5 12 5 Tons Accessories Service Instructions Not for installation in the United States or Canada This unit is for export only ...

Page 48: ... assistance line for dealers Outside the U S call 1 713 861 2500 Not a technical assistance line for dealers Your telephone company will bill you for the call HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death IMPORTANTINFORMATION 2 3 PRODUCTIONIDENTIFICATION 4 6 PRODUC...

Page 49: ...e cover is not properly in place a venting terminal may discharge a combination of a hot lubricating oil and refrigerant b flammable mixture if system is contaminated with air inastreamofspraywhichmaybedangeroustoanyoneinthe vicinity Death or serious bodily injury could occur Under no circumstances is a hermetic compressor to be electrically energized and or operated without having the terminal pr...

Page 50: ... Tons B Belt Drive D Direct Drive Nominal Heating Capacity Gas Electric A C H P Factory Installed Electric Heat 180 180 000 BTU h XXX No Heat 030 30 kW 1 208 230 1 60 United States 4 460 3 60 United States 300 300 000 BTU h 016 15 kW 045 44 kW 3 208 230 3 60 United States 5 400 3 50 Russia Daikin Brand 350 350 000 BTU h 6 400 3 60 Saudi Arabia A 400 3 50 Russia Goodman Brand B 400 3 50 Kuwait E 40...

Page 51: ...se 60Hz Belt Drive Initial release of 7 5 12 5 Ton Daikin branded models DCH 090 120 XXX6BXXXAB Daikin Commercial Package Heat Pump Multiposition heat pump units 400V 3 Phase 60Hz Belt Drive with phase monitor DCH150XXX6BXXXAD Daikin Commercial Package Heat Pump Multiposition heat pump units 400V 3 Phase 60Hz Belt Drive with phase monitor Daikin Commercial Multiposition Package Heat Pumps ...

Page 52: ...150 XXX6BVXXAA Daikin Commercial Package Cooler Multiposition cooling units 400V 3 Phase 60 Hz Belt Drive Factory installed options Low Leak Downflow Economizer DCC 090 120 XXX6BXXXAB Daikin Commercial Package Cooler Multiposition cooling units 400V 3 Phase 60 Hz Belt Drive with phase monitor DCC150XXX6BXXXAB Daikin Commercial Package Cooler Multiposition cooling units 400V 3 Phase 60 Hz Belt Driv...

Page 53: ...er be obstructed If used do not allow the econo mizer manualfreshairdamper motorizedfreshairdamper to become blocked by snow or debris In some climates or locations it may be necessary to elevate the unit to avoidtheseproblems Whentheunitisheating thetemperatureofthereturnair entering the unit must be between 50 F and 100 F GROUND LEVEL INSTALLATIONS ONLY When the unit is installed on the ground a...

Page 54: ...theunitmightoccur NOTE The unit and curb accessories are designed to allow vertical duct installation before unit placement Duct installation after unit placement is not recommended ALL CURBS LOOK SIMILAR TO AVOID INCORRECT CURB POSITIONING CHECK JOB PLANS CAREFULLY AND VERIFY MARKINGS ON CURB ASSEMBLY INSTRUCTIONS MAY VARY IN CURB STYLES AND SUPERCEDE INFORMATION SHOWN CAUTION See the manual ship...

Page 55: ...ry wired for the voltage shown on the unit s data plate Main power wiring should be sized for the minimum wire ampacity shown on the unit s database Size wires in accordance with the ampacity tables in Article 310 of the NationalElectricalCode Iflongwiresarerequired itmaybe necessary to increase the wire size to prevent excessive voltage drop Wires should be sized for a maximum of 3 voltagedrop TO...

Page 56: ...ANCE LOCATIONS Unit is equipped with a Low Voltage Terminal Block and has SinglePointwiringtothecontactororpowerblockifequipped LOW VOLTAGE CONTROL WIRING 1 A 24V thermostat must be installed for unit operation It may be purchased with the unit or field supplied Ther mostatsmaybeprogrammableorelectromechanicalas required 2 Locate thermostat or remote sensor in the conditioned space where it will s...

Page 57: ...al Package Cooling or Package Gas RestrictorOrificeAssemblyinCoolingOperation In the cooling mode the orifice is pushed into its seat forcing refrigerant to flow through the metered hole in the center of the orifice DCC XXX XXX ...

Page 58: ... OPERATION 12 Indoor Coil Accumulator Outdoor Coil Reversing Valve Energized Indoor Coil Accumulator Outdoor Coil Reversing Valve De Energized DCH XXX XXX Typical Package Heat Pump COOLING CYCLE HEATINGCYCLE ...

Page 59: ...in STARTUP ADJUSTMENTS AND CHECKS HIGH VOLTAGE TO AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK BOND THE FRAME OF THIS UNIT TO THE BUILDING ELECTRICAL GROUND BY USE OF THE GROUNDING TERMINAL PROVIDED OR OTHER ACCEPTABLE MEANS DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT WARNING TO PREVENT PROPERTY DAMAGE OR PERSONAL INJURY DO NOT START THE UNIT UNTIL ALL NECESSARY PRE CHE...

Page 60: ...ck Do not attempt to change load side wiring Internal wiring assures all motors and compressors will rotate in correct directiononceevaporatorfanmotorrotationcheckhasbeen made ELECTRICAL INPUT CHECK Make preliminary check of evaporator fan ampere draw and verify that motor nameplate amps are not exceeded A final check of amp draw should be made upon completion of air balancing of the duct system B...

Page 61: ...check heater operation if outdoor ambient is mild 15 For thermostats with emergency heat switch return to step 11 The emergency heat switch is located at the bottomofthethermostat Movetheswitchtoemergency heat Theheatpumpwillstop theblowerwillcontinueto run all heaters will come on and the thermostat emer gency heat light will come on 16 If checking the unit in the wintertime when the outdoor coil...

Page 62: ...has completed During operation the power to the circuit board is controlled by a temperature sensor which is clamped to a feeder tube enteringtheoutdoorcoil Defrosttimingperiodsof30 60and 90 minutes may be selected by connecting the circuit board jumper to 30 60 and 90 respectively Accumulation of time for the timing period selected starts when the sensor closes approximately31 F andwhenthewallthe...

Page 63: ...tionManual 14 Check condenser fans and tighten set screws FILTERS CAUTION TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT BUILD UP ON INTERNAL PARTS NEVER OPERATE UNIT WITHOUT AN AIR FILTER INSTALLED IN THE RETURN AIR SYSTEM Everyapplicationmayrequireadifferentfrequencyofreplace ment of dirty filters Filters must be replaced at least...

Page 64: ...nd Contacts S 7 Open Control Circuit Test Control Circuit with Voltmeter S 4 Low Voltage Test Voltage S 1 Faulty Evap Fan Motor Repair or Replace S 16 Shorted or Grounded Fan Motor Test Motor Windings S 16 Improper Cooling Anticipator Check Resistance of Anticipator S 3B Shortage of Refrigerant Test For Leaks Add Refrigerant S 101 103 Restricted Liquid Line Remove Restriction Replace Restricted Pa...

Page 65: ...6A Checking Fan Blower Motor Windings PSC Motors 26 S 17 CheckingCompressorWindings 26 S 17A Resistance Test 26 S 17B GroundTest 27 S 17D OperationTest 27 S 18 Testing Crankcase Heater optional item 27 S 18A CrankcaseHeaterThermostat 28 S 21 CheckingReversingValve Solenoid 28 S 24 TestingDefrostControl 28 S 25 TestingDefrostThermostat 28 S 50 Checking Heater Limit Control s 29 S 52 CheckingHeaterE...

Page 66: ...voltage tabulation as shown If the voltage falls below the minimum voltage checkthelinewiresize Longrunsofundersizedwirecan causelowvoltage Ifwiresizeisadequate notifythelocal power company in regards to either low or high voltage Voltage Min Max 208 230 198 253 400 360 440 460 437 506 575 546 604 Unit Supply Voltage Three phase units require a balanced 3 phase power supply to operate If the perce...

Page 67: ...air or replace as necessary S 3B COOLING ANTICIPATOR The cooling anticipator is a small heater resistor in the thermostat During the off cycle it heats the bimetal elementhelpingthethermostatcallforthenextcoolingcycle This prevents the room temperature from rising too high before the system is restarted A properly sized anticipator should maintain room temperature within 1 1 2 to 2 degree range Th...

Page 68: ...NTACTOR CONTACTS SINGLEPHASE HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death 1 Disconnectthewireleadsfromtheterminal T sideofthe contactor 2 With power ON energize the contactor VOLT OHM METER T1 T2 L1 L2 CC Ohmmeter for testing holding coil Voltmeter for testing con...

Page 69: ... for checking control board for single phase gas models For3phaseandbeltdrivemodels theprocedurefortesting the fan relay contacts will be the same as checking the compressor contactor contacts See section S 8 DCC DCH TheElectronicBlowerTimeDelayRelayisusedonPSCand beltdrivenmodels HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failu...

Page 70: ...s of the control open breaking the controlcircuitbeforethecompressormotoroverloads This control is automatically reset 1 Using an ohmmeter check across terminals of high pressure control with wire removed If not continuous the contacts are open 3 Attach a gauge to the access fitting on the liquid line With power ON 4 Start the system and place a piece of cardboard in front of the condenser coil ra...

Page 71: ...f shock to the servicer See the Servicing Section for specific information concerning capacitors RELAY START A potential or voltage type relay is used to take the start capacitoroutofthecircuitoncethemotorcomesuptospeed This type of relay is position sensitive The normally closed contacts are wired in series with the start capacitor and the relay holding coil is wired parallel with the start windi...

Page 72: ...lity if a terminal vents that the vaporous andliquiddischargecanbeignited spoutingflamesseveral feet causingpotentiallysevereorfatalinjurytoanyoneinits path This discharge can be ignited external to the compressor if theterminalcoverisnotproperlyinplaceandifthedischarge impinges on a sufficient heat source Ignitionofthedischargecanalsooccurattheventingterminal orinsidethecompressor ifthereissuffic...

Page 73: ...ove the compressorterminalprotectivecoverandinspectfor loose leads or insulation breaks in the lead wires 4 Ifnovisualproblemsindicated carefullyremovetheleads at the compressor terminals WARNING Damage can occur to the glass embedded terminals if the leads are not properly removed This can result in terminal and hot oil discharging Carefullyretestforground directlybetweencompressor terminalsandgr...

Page 74: ...ationofthethermostatandthecontinuityoftheconnect ing wiring from the O terminal of the thermostat to the unit If voltage is registered at the coil tap the valve body lightly while switching the system from HEATING to COOLING etc Ifthisfailstocausethevalvetoswitchpositions remove thecoilconnectorcapandtestthecontinuityofthereversing valve solenoid coil If the coil does not test continuous replace i...

Page 75: ...f it is on the heating cycle raise the discharge pressure by restricting airflow through the indoor coil If the valve does not shift tap it lightly on both ends with a screwdriver handle DO NOT TAP THE VALVE BODY If the unit is on the coolingcycle raisethedischargepressurebyrestrict ingairflowthroughtheoutdoorcoil Ifthevalvedoesnot shift after the above attempts cut the unit off and wait untilthed...

Page 76: ... the system to working pressure then apply the detector to suspect areas If leaks are found repairthem Afterrepair repeatthepressuretest Ifnoleaks exist proceed to system evacuation S 102 EVACUATION WARNING REFRIGERANT UNDER PRESSURE Failure to follow proper procedures may cause property damage personal injury or death This is the most important part of the entire service proce dure The life and e...

Page 77: ...proper amountofrefrigerantforthesystem Allowliquidrefriger ant only to enter the high side 2 After the system will take all it will take close the valve on the high side of the charging manifold 3 Startthesystemandchargethebalanceoftherefrigerant through the low side NOTE R410A should be drawn out of the storage container or drum in liquid form due to its fractionation properties but should be Fla...

Page 78: ...sconsideredsuperheatedwhenitstempera tureishigherthanthesaturationtemperaturecorresponding toitspressure Thedegreeofsuperheatequalsthedegrees oftemperatureincreaseabovethesaturationtemperatureat existing pressure See Temperature Pressure Chart CAUTION To prevent personal injury carefully connect and disconnect manifold gauge hoses Escaping liquid refrigerant can cause burns Do not vent refrigerant...

Page 79: ... 60 8 6 162 0 57 0 264 0 87 4 366 0 110 4 468 0 129 0 600 0 149 0 62 10 0 164 0 57 7 266 0 87 9 368 0 110 8 470 0 129 3 604 0 149 5 64 11 3 166 0 58 4 268 0 88 4 370 0 111 2 472 0 129 7 608 0 150 1 66 12 6 168 0 59 0 270 0 88 9 372 0 111 6 474 0 130 0 612 0 150 6 68 13 8 170 0 59 8 272 0 89 4 374 0 112 0 476 0 130 3 616 0 151 2 70 15 1 172 0 60 5 274 0 89 9 376 0 112 4 478 0 130 7 620 0 151 7 72 1...

Page 80: ...80 78 308 90 88 86 84 82 80 317 92 90 88 86 84 82 326 94 92 90 88 86 84 335 96 94 92 90 88 86 345 98 96 94 92 90 88 354 100 98 96 94 92 90 364 102 100 98 96 94 92 374 104 102 100 98 96 94 384 106 104 102 100 98 96 395 108 106 104 102 100 98 406 110 108 106 104 102 100 416 112 110 108 106 104 102 427 114 112 110 108 106 104 439 116 114 112 110 108 106 450 118 116 114 112 110 108 462 120 118 116 114...

Page 81: ...coilandliquidreturntothecompressor but the head pressure would be lower Thereareothercausesforhighheadpressurewhichmaybe found in the Service Problem Analysis Guide Ifothercausescheckoutnormal anoverchargeorasystem containingnon condensableswouldbeindicated If this system is observed 1 Start the system 2 Remove and capture small quantities of refrigerant as from the suction line access fitting unt...

Page 82: ...reat of an external static pressure will result in insufficient air that can cause icing of the coil whereas too much air can cause poor humidity control and condensate to be pulled off the evaporator coil causing condensate leakage Too much air can cause motor overloading and in many cases this constitutes a poorly designed system To determine proper air movement proceed as follows 1 Using a draf...

Page 83: ...n be measured using a belt tension gauge available through most belt manufacturers Thecorrectdeflectionforceis5Ibs foranewbeltand3 5Ibs for a belt that has been run in New belt tension includes initial belt stretch When new V belts are installed on a drive the initial tension will drop rapidly during the first few hours Check tension frequentlyduringthefirst24hoursofoperation Subsequent retensioni...

Page 84: ...vinganddrivenmotorsheavesshouldbeinalignment with each other and the shafts parallel VL VM SHEAVES ADJUSTMENT 1 Loosen set screw B using a 5 32 Allen key 2 Making half or full turns from closed position adjust sheavepitchdiameterfordesiredspeed DONOTOPEN MORETHANSIXFULLTURNS 3 Tighten set screw B securely over flat 4 Carefully put on belts and adjust belt tension DO NOT FORCE BELTS OVER GROOVES 5 ...

Page 85: ...els No Barometric Relief MCCDANIEL METALS 7 5 12 5 Ton 1036610B2 Downflow Economizer ROOFTOP SYSTEMS 7 5 10 Ton 1036612B2 Downflow Economizer ROOFTOP SYSTEMS 12 5 Ton DDNSQRD9020 Downflow Square to Round Adapter 20 Round 7 5 12 5 Ton DHZECNJ90150 Horizontal Jade Economizer All Fuels 7 5 12 5 Ton DPE901502 Power Exhaust 208 230v 7 5 12 5 Ton DPE901504 Power Exhaust 460v 7 5 12 5 Ton DPE901507 Power...

Page 86: ... POWER BEFORE SERVICING OR INSTALLING THIS UNIT MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH Wiring is subject to change Always refer to the wiring diagram on the unit for the most up to date wiring ...

Page 87: ...he most up to date wiring EHK4 16 BK BK RD YL RD 9 WH 8 7 6 RS BL 5 4 3 2 PC 1 BK FL HTR 3 FL FL HTR 2 HTR 1 TL TL TL RD YL PU COMPONENT CODE PC 9 PIN CONNECTOR HTR HEATER ELEMENT TL THERMAL LIMIT RS RELAY SEQUENCER FL FUSE LINK OP OVERLOAD PROTECTION LOW VOLTAGE WIRING CODE HIGH VOLTAGE PU M2 M1 CT1 BL WH EHK3 10 EHK3 15 EHK3 16 EHK4 10 EHK4 15 EHK4 16 EHK7 10 EHK7 15 EHK7 16 MODEL CT CONTACTOR 0...

Page 88: ...400V EHK4 30 COMPONENT CODE PC 9 PIN CONNECTOR HTR HEATER ELEMENT TL THERMAL LIMIT RS RELAY SEQUENCER FL FUSE LINK OP OVERLOAD PROTECTION LOW VOLTAGE WIRING CODE HIGH VOLTAGE CT CONTACTOR BK RD YL RD 9 WH 8 7 6 BL 5 4 3 2 PC 1 BK FL HTR 3 FL FL HTR 2 HTR 1 TL TL TL YL BK RD YL RD BK FL HTR 6 FL FL HTR 5 HTR 4 TL TL TL RD YL PU PU BR BK RD RD YL BK YL BK RD RD YL BK YL RS1 CT2 CT1 BK BL BL WH BR MO...

Page 89: ...ENT TL THERMAL LIMIT RS RELAY SEQUENCER FL FUSE LINK OP OVERLOAD PROTECTION LOW VOLTAGE WIRING CODE HIGH VOLTAGE CT CONTACTOR MODEL EHK3 45 EHK4 45 EHK7 45 BK RD YL RD 9 WH 8 7 6 BL 5 4 3 2 PC 1 BK FL HTR 3 FL FL HTR 2 HTR 1 TL TL TL YL BK RD YL RD BK FL HTR 6 FL FL HTR 5 HTR 4 TL TL TL RD YL PU PU BR BK RD RD YL BK YL BK RD RD YL BK YL BK RD YL RD BK FL HTR 9 FL FL HTR 8 HTR 7 TL TL TL RD YL BK R...

Page 90: ...44 DCC COMMERCIAL 7 5 12 5 Ton Packaged Air Conditioner Unit WIRING DIAGRAMS ...

Page 91: ... BK 6 2 8 5 7 3 9 4 1 PLF 1 WH GND COLOR CODE BK BLACK BL BLUE BR BROWN OR ORANGE PU PURPLE RD RED WH WHITE YL YELLOW PK PINK GR GREEN WIRING CODE FACTORY WIRING HIGH VOLTAGE LOW VOLTAGE OPTIONAL HIGH VOLTAGE OPTIONAL LOW VOLTAGE FIELD WIRING HIGH VOLTAGE LOW VOLTAGE S1 S2 R C G W 1 W 2 Y1 Y2 O PK COM R NC NO UP C K1 SPEE D K1 M1 XFMR C EBTDR XFM R R M2 3 2 1 9 6 8 7 4 5 RD WH PU PK PK PU WH YL BR...

Page 92: ... BL O O OR W2 W2 BR COMPONENT LEGEND BC CC CM CMR COMP DC DFT ECON EBTD EMR R EM FC GND HPS HVDR LPS LVDR PB PLF PM RCCF TB1 TR BLOWER CONTACTOR COMPRESSOR CONTACTOR CONDENSER MOTOR CONDENSER MOTOR RELAY COMPRESSOR DEFROST CONTROL DEFROST THERMOSTAT ECONOMIZER ELECTRONIC BLOWER TIME DELAY EVAPORATOR MOTOR RELAY RELAY EVAPORATOR MOTOR FAN CAPACITOR EQUPIMENT GROUND HIGH PRESSURE SWITCH HIGH VOLTAGE...

Page 93: ...47 DCH COMMERCIAL 7 5 12 5 Ton Packaged Heat Pump Unit WIRING DIAGRAMS ...

Page 94: ...D RED WH WHITE YL YELLOW PK PINK GR GREEN WIRING CODE FACTORY WIRING HIGH VOLTAGE LOW VOLTAGE OPTIONAL HIGH VOLTAGE FIELD WIRING HIGH VOLTAGE 5 3 2 1 4 NC NO S1 S2 R C G W1 W 2 Y1 Y2 O RD PK DFT1 DFT2 RVC1 RVC2 COM R NC NO UP C K1 SPEED K1 M1 XFMR C EBTDR XFMR R M2 3 2 1 9 6 8 7 4 5 RD WH PU PK YL WH YL BR GR GR GR GR BL BL BL RD HVDR DF2 C R DC O O R LVDR Y DFT W2 DF1 RD RD BL YL PU PU PU PU BR B...

Page 95: ...ORS ONLY USE N E C CLASS 2 W IRE 3 ECONOMIZER PLUG LOCA TED IN THE RETURN AIR COMPARTMENT REMOVE MALE PLUG AND ATTAC H FEMA LE PLUG TO THE ECONOMIZER ACCESSORY 4 FOR TW O STAGE OPERATION REMOVE W 1 TO W 2 JUMPER W IRE EBTDR CC1 HPS1 LPS1 L OW VOLTAGE LIN E VOLTAGE FIELD WIRING L OW VOLTAGE O PTIONAL H IGH VOLTAGE FACTORY WIRING HIGH VOLTAGE CC2 GR GREEN WIRE CODE BL BLUE PU PURPLE PK PINK WH WHITE...

Page 96: ... improper service procedures or services performed by an unqualified person Copyright 2015 2016 RSDX6412008r2 September 2016 DCC Cooling Commercial Package Units with R 410A Refrigerant 15 25 Tons Accessories Service Instructions NOTE 15 20 ton model shown in pictures 25 ton model has 2 fans Not for installation in the United States or Canada This unit is for export only ...

Page 97: ...l assistance line for dealers Outside the U S call 1 713 861 2500 Not a technical assistance line for dealers Your telephone company will bill you for the call HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death IMPORTANTINFORMATION 2 3 PRODUCTIONIDENTIFICATION 4 5 PRODU...

Page 98: ...e cover is not properly in place a venting terminal may discharge a combination of a hot lubricating oil and refrigerant b flammable mixture if system is contaminated with air inastreamofspraywhichmaybedangeroustoanyoneinthe vicinity Death or serious bodily injury could occur Under no circumstances is a hermetic compressor to be electrically energized and or operated without having the terminal pr...

Page 99: ...5 Tons 072 6 Tons 240 20 Tons B Belt Drive 090 7 Tons 300 25 Tons D Direct Drive Nominal Heating Capacity Gas Electric A C H P Factory Installed Electric Heat 180 180 000 BTU h XXX No Heat 030 30 kW 1 208 230 1 60 United States 4 460 3 60 United States 300 300 000 BTU h 016 15 kW 045 44 kW 3 208 230 3 60 United States 5 400 3 50 Russia Daikin Brand 350 350 000 BTU h 6 400 3 60 Saudi Arabia A 400 3...

Page 100: ...ooler R410A 400V 3 Phase 60 Hz Belt Drive Initial release of 15 25 Ton Daikin branded models DCC 240 300 XXX6BXXXAB Daikin Commercial Package Cooler R410A 400V 3 Phase 60 Hz Belt Drive with phase monitor DCC180XXX6BXXXAC Daikin Commercial Package Cooler R410A 400V 3 Phase 60 Hz Belt Drive with phase monitor Daikin Commercial Package Coolers ...

Page 101: ... across finished roof without prior approvalofownerorarchitect Donotskidorslideonanysurfaceasthismaydamage unit base The unit must be stored on a flat level surface Protect the condenser coil because it is easilydamaged ROOF CURB INSTALLATIONS ONLY Curb installations must comply with local codes and should bedoneinaccordancewiththeestablishedguidelinesofthe National Roofing Contractors Association...

Page 102: ...ITH FACTORY WIRING THE INTERNAL POWER AND CONTROL WIRING OF THESE UNITS ARE FACTORY INSTALLED AND HAVE BEEN THOROUGHLY TESTED PRIOR TO SHIPMENT CONTACT YOUR LOCAL REPRESENTATIVE IF ASSISTANCE IS REQUIRED WARNING TO PREVENT DAMAGE TO THE WIRING PROTECT WIRING FROM SHARP EDGES FOLLOW NATIONAL ELECTRICAL CODE AND ALL LOCAL CODES AND ORDINANCES DO NOT ROUTE WIRES THROUGH REMOVABLE ACCESS PANELS CAUTIO...

Page 103: ...ot fused Protect the powerleadsatthepointofdistributioninaccordancewith the unit data plate The unit must be electrically grounded in accordance with local codes or in the absence of local codes with the latest edition of the National Electrical Code ANSI NFPA70 Agroundlugisprovidedforthispurpose Size groundingconductorinaccordancewithTable250 95of the National Electrical Code Do not use the groun...

Page 104: ...l Block and has Single Point wiring to the contactor LOW VOLTAGE CONTROL WIRING 1 A 24V thermostat must be installed for unit operation It may be purchased with the unit or field supplied Ther mostatsmaybeprogrammableorelectromechanicalas required 2 Locate thermostat or remote sensor in the conditioned space where it will sense average temperature Do not locate the device where it may be directly ...

Page 105: ...ling or Package Gas Either a thermostatic expansion valve or restrictor orifice assembly may be used depending on model refer to the parts catalog for the model being serviced DCC XXX XXX Indoor Coil Outdoor Coil Thermostatic Expansion Valve ...

Page 106: ...dic cleaning is neces sary to prevent this build up from plugging the drain STARTUP ADJUSTMENTS AND CHECKS HIGH VOLTAGE TO AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK BOND THE FRAME OF THIS UNIT TO THE BUILDING ELECTRICAL GROUND BY USE OF THE GROUNDING TERMINAL PROVIDED OR OTHER ACCEPTABLE MEANS DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT WARNING TO PREVENT PROPERTY DA...

Page 107: ...n the ranges given stated on Data Plate ELECTRICAL INPUT CHECK Make preliminary check of evaporator fan ampere draw and verify that motor nameplate amps are not exceeded A final check of amp draw should be made upon completion of air balancing of the duct system BELT DRIVE MODELS ONLY Thedriveonthesupplyfanistypicallysetinthemiddleofthe RPM range The drive motor sheave pitch diameter is field adju...

Page 108: ... are shown on the unit s nameplate To confirm charge levels or if a leak occurs and charge needs to be added to the system it is recommendedtoevacuatethesystemandrechargerefriger atetounitnameplatespecifications Thisunithasbeenrated in the cooling mode at the AHRI rated conditions of Indoor 80 db 67 wb andoutdoor 95 db Whileoperatingatthis condition the subcooling should range from 12 to 15 F for ...

Page 109: ...for mationManual 14 Check condenser fans and tighten set screws FILTERS TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT BUILD UP ON INTERNAL PARTS NEVER OPERATE UNIT WITHOUT AN AIR FILTER INSTALLED IN THE RETURN AIR SYSTEM CAUTION Everyapplicationmayrequireadifferentfrequencyofreplace ment of dirty filters Filters must be replaced at...

Page 110: ...nd Contacts S 7 Open Control Circuit Test Control Circuit with Voltmeter S 4 Low Voltage Test Voltage S 1 Faulty Evap Fan Motor Repair or Replace S 16 Shorted or Grounded Fan Motor Test Motor Windings S 16 Improper Cooling Anticipator Check Resistance of Anticipator S 3B Shortage of Refrigerant Test For Leaks Add Refrigerant S 101 103 Restricted Liquid Line Remove Restriction Replace Restricted Pa...

Page 111: ...ingCapacitor 21 S 15A Resistance Check 22 S 15B CapacitanceCheck 22 S 16 CheckingMotors 23 S 16A Checking Fan Motor Windings PSC Motors 23 S 17 CheckingCompressorWindings 23 S 17A Resistance Test 23 S 17B GroundTest 24 S 17D OperationTest 24 S 18 TestingCrankcaseHeater OptionalItem 24 S 50 Checking Heater Limit Control s 25 S 100 RefrigerationRepairPractice 25 S 101 LeakTesting 25 S 102 Evacuation...

Page 112: ...voltage tabulation as shown If the voltage falls below the minimum voltage checkthelinewiresize Longrunsofundersizedwirecan causelowvoltage Ifwiresizeisadequate notifythelocal power company in regards to either low or high voltage Voltage Min Max 208 230 198 253 400 360 404 460 437 506 575 546 604 Unit Supply Voltage Three phase units require a balanced 3 phase power supply to operate If the perce...

Page 113: ...air or replace as necessary S 3B COOLING ANTICIPATOR The cooling anticipator is a small heater resistor in the thermostat During the off cycle it heats the bimetal elementhelpingthethermostatcallforthenextcoolingcycle This prevents the room temperature from rising too high before the system is restarted A properly sized anticipator should maintain room temperature within 1 1 2 to 2 degree range Th...

Page 114: ...omtheterminal T sideofthe contactor 2 With power ON energize the contactor 3 Using a voltmeter test across terminals A L1 L2 L1 L3 and L2 L3 If voltage is present proceedtoB Ifvoltageisnotpresent checkbreaker or fuses on main power supply B T1 T2 T1 T3 andT2 T3 Ifvoltagereadingsarenot the same as in A replace contactor VOLT OHM METER CC Ohmmeter for testing holding coil Voltmeter for testing conta...

Page 115: ...p 5 5 Using a VOM check for 24 volts from terminals 3 and 4 of relay Should read 24 volts If not as above replace relay CheckingEBTDRContactOperation With power on 1 Set the thermostat to the fan on position 2 Check for 24 volts at the C and G terminals of the EBTDR 3 If no voltage present check fan circuit from thermostat If 24 volts present proceed to step 4 4 UsingAVOMcheckfor24voltsbetweentheN...

Page 116: ...tself with a rise in pressure The low pressure control is designed to cut out open at approximately 22 PSIG 7 PSIG It will automatically cut in close at approximately 50 PSIG 7 PSIG Test for continuity using a VOM and if not as above replace the control S 15 CHECKING CAPACITOR CAPACITOR RUN A run capacitor is wired across the auxiliary and main windingsofasinglephasepermanentsplitcapacitormotor Th...

Page 117: ...t a capacitor are a resistance and a capacitance check S 15A RESISTANCE CHECK HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage personal injury or death 1 Discharge capacitor and remove wire leads WARNING Discharge capacitor through a 20 to 30 OHM resistor before handling OHMMETER CAPACITOR TE...

Page 118: ...be ignited external to the compressor if theterminalcoverisnotproperlyinplaceandifthedischarge impinges on a sufficient heat source Ignitionofthedischargecanalsooccurattheventingterminal orinsidethecompressor ifthereissufficientcontaminantair present in the system and an electrical arc occurs as the terminalvents Ignition cannot occur at the venting terminal without the presence of contaminant air...

Page 119: ...charging Carefully retest for ground directly between com pressor terminals and ground 5 If ground is indicated replace the compressor S 17D OPERATION TEST Ifthevoltage capacitor overloadandmotorwindingtestfail to show the cause for failure HIGH VOLTAGE Disconnect ALL power before servicing or installing this unit Multiple power sources may be present Failure to do so may cause property damage per...

Page 120: ...e applying heat to the system When repairing the refrigeration system WARNING Disconnect ALL power before servicing 1 Never open a system that is under vacuum Air and moisture will be drawn in 2 Plug or cap all openings 3 Remove all burrs and clean the brazing surfaces of the tubingwithsandclothorpaper Brazingmaterialsdonot flow well on oxidized or oily surfaces 4 Cleantheinsideofallnewtubingtorem...

Page 121: ...theshutoffvalvetothe high vacuum gauge manifold only After the compound gauge lowside hasdroppedtoapproximately29inches of vacuum open the valve to the vacuum thermocouple gauge See that the vacuum pump will blank off to a maximum of 25 microns A high vacuum pump can only produce a good vacuum if its oil is non contaminated LOW SIDE GAUGE AND VALVE HIGH SIDE GAUGE AND VALVE EVACUATION 3 Ifthevacuu...

Page 122: ...etoolow addcharge Ifpressuresandamp draw are too high remove charge Check subcooling and superheat as detailed in the following section 5 Withthesystemstillrunning removehoseandreinstall bothvalvecaps 6 Check system for leaks Duetotheirdesign Scrollcompressorsareinherentlymore tolerantofliquidrefrigerant NOTE Even though the compressor section of a Scroll compressor is more tolerant of liquid refr...

Page 123: ...ube is plugged 5 Capturethecharge replacethevalveanddrier evacuate andrecharge S 112 CHECKING RESTRICTED LIQUID LINE When the system is operating the liquid line is warm to the touch If the liquid line is restricted a definite temperature dropwillbenoticedatthepointofrestriction Inseverecases frostwillformattherestrictionandextenddownthelineinthe direction of the flow Discharge and suction pressur...

Page 124: ... 60 8 6 162 0 57 0 264 0 87 4 366 0 110 4 468 0 129 0 600 0 149 0 62 10 0 164 0 57 7 266 0 87 9 368 0 110 8 470 0 129 3 604 0 149 5 64 11 3 166 0 58 4 268 0 88 4 370 0 111 2 472 0 129 7 608 0 150 1 66 12 6 168 0 59 0 270 0 88 9 372 0 111 6 474 0 130 0 612 0 150 6 68 13 8 170 0 59 8 272 0 89 4 374 0 112 0 476 0 130 3 616 0 151 2 70 15 1 172 0 60 5 274 0 89 9 376 0 112 4 478 0 130 7 620 0 151 7 72 1...

Page 125: ...80 78 308 90 88 86 84 82 80 317 92 90 88 86 84 82 326 94 92 90 88 86 84 335 96 94 92 90 88 86 345 98 96 94 92 90 88 354 100 98 96 94 92 90 364 102 100 98 96 94 92 374 104 102 100 98 96 94 384 106 104 102 100 98 96 395 108 106 104 102 100 98 406 110 108 106 104 102 100 416 112 110 108 106 104 102 427 114 112 110 108 106 104 439 116 114 112 110 108 106 450 118 116 114 112 110 108 462 120 118 116 114...

Page 126: ...e drop across the drier Pressure drop should not exceed 6 PSIG 7 Continue to run the system for several days repeatedly checking pressure drop across the suction line drier If thepressuredropneverexceedsthe6PSIG thedrierhas trappedthecontaminants Removethesuctionlinedrier from the system 8 If the pressure drop becomes greater then it must be replaced and steps 5 through 9 repeated until it does no...

Page 127: ...oes not reverse any two incoming power cables at Single Point Power Block In this case repeat bearing check Do not attempt to change load side wiring Internal wiring assures all motors and compressors will rotate in correct directiononceevaporatorfanmotorrotationcheckhasbeen made S 207 MOTOR SHEAVE ADJUSTMENTS VL VM 2VP VARIABLE PITCH KEY TYPE MOTOR SHEAVES Thedrivinganddrivenmotorsheavesshouldbei...

Page 128: ... is required to meet UL requirements Accessory Number Description Model Size EHK Heater Kit 15 25 Ton DAIKIN COMMERCIAL PACKAGE UNIT ACCESSORIES Complete listing of EHK kits listed on electrical data page in DCC manuals DCC XXX XXX HEATER KITS UNIT HEATER KIT MODEL NUMBER MINIMUM CFM Downshot EHK4 31 5250 15 TON EHK4 46 5250 EHK4 60 5250 EHK4 31 7000 20 TON EHK4 46 7000 25 TON EHK4 60 7000 EHK4 75...

Page 129: ...the most up to date wiring EHK4 31 LOW VOLTAGE WIRING CODE HIGH VOLTAGE MODEL EHK4 31 EHK7 31 COMPONENT CODE PC 9 PIN CONNECTOR HTR HEATER ELEMENT TL THERMAL LIMIT RS RELAY SEQUENCER FL FUSE LINK OR NON RESETTING THERMOSTAT OP OVERLOAD PROTECTION WH M2 M1 BK BK BK BK PU PU WH BR BL 1 PC 2 3 4 5 6 7 8 9 FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL BR OP L1 L2 L3 OP BK RD ...

Page 130: ...ODE PC 9 PIN CONNECTOR HTR HEATER ELEMENT TL THERMAL LIMIT RS RELAY SEQUENCER FL FUSE LINK OR NON RESETTING THERMOSTAT OP OVERLOAD PROTECTION LOW VOLTAGE WIRING CODE HIGH VOLTAGE MODEL EHK4 46 EHK7 46 WH M2 M1 BK BK BK BK BK BK PU PU WH BR BL 1 PC 2 3 4 5 6 7 8 9 FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL BR OP L1 L2 L3 OP BK RD YL O...

Page 131: ...0 EHK7 60 COMPONENT CODE PC 9 PIN CONNECTOR HTR HEATER ELEMENT TL THERMAL LIMIT RS RELAY SEQUENCER FL FUSE LINK OR NONRESETTING THERMOSTAT OP OVERLOAD PROTECTION WH M2 M1 BK BK BK BK BK BK BK BK PU PU WH BR BL 1 PC 2 3 4 5 6 7 8 9 FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL BR OP L1 L2 L3 OP BK RD Y...

Page 132: ...ECTOR HTR HEATER ELEMENT TL THERMAL LIMIT RS RELAY SEQUENCER FL FUSE LINK OR NONRESETTING THERMOSTAT OP OVERLOAD PROTECTION WH M2 M1 BK BK BK BK BK BK BK BK BK BK PU PU WH BR BL 1 PC 2 3 4 5 6 7 8 9 FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL FL HTR 1 FL FL HTR 2 HTR 3 TL TL TL OP L1 L2 L3 OP BK RD YL FL HTR 1 FL FL HTR 2 HTR 3 TL TL ...

Page 133: ...38 DCC COMMERCIAL 15 25 Ton Packaged Air Conditioner Unit WIRING DIAGRAMS ...

Page 134: ...PU BR BR BR BR BR BR BR BR RD RD BL BL BL BL BL BL BL BL YL YL GR GR YL BL BL YL PU WH WH YL YL GR PU PU BL YL BL PK 0140L06195 A 400 30 60 RD BK OR RD BK OR RD BK OR RD BK PB 6 2 8 5 7 3 9 4 1 M2 G XFMR R EBTDR XFMR C M1 K1 K1 C NO NC R COM GR RD WH WH BR RD RD RD RD BL BL BL GR GR YL PU PU PU PU RD GR GR GR BL BL BK BK BK RD CCH1 CCH2 2 1 4 6 2 1 4 6 BL YL CCHR1 CCHR2 OR BL BK PU BK BK BK OR RD ...

Page 135: ...R TYPE AND SIZE OF OVER CURRENT PROTECTION WIRE CODE BK BLACK BL BLUE BR BROWN GR GREEN OR ORANGE PK PINK PU PURPLE RD RED WH WHITE YL YELLOW YL PK YELLOW WITH PINK STRIP BL PK BLUE WITH PINK STRIP FACTORY WIRING LOW VOLTAGE LINE VOLTAGE FIELD WIRING 2 STAGE COOLING OPTIONAL HIGH VOLTAGE FACTORY WIRING HIGH VOLATGE LOW VOLATGE COMPONENT LEGEND BLOWER CONTACTOR COMPRESSOR CONTACTOR CRANK CASE HEATE...

Page 136: ...K D R D R OR BK OR BK BK BK BK BK PU PU PU PU PU PU PU PU BR BR BR BR BR BR BR BR RD RD BL BL BL BL BL BL BL BL YL YL GR GR GR YL BL BL YL PU WH WH YL YL GR PU PU BL YL YL BL PK 400V RD BK OR RD BK OR RD BK OR RD BK OR PB 6 2 8 5 7 3 9 4 1 M2 G XFMR R EBTDR XFMR C M1 K1 K1 C NO NC R COM GR RD WH WH BR BR RD RD RD BL BL BL GR GR YL PU PU PU PU RD GR GR GR BL BL BK BK BK RD CCH1 CCH2 2 1 4 6 2 1 4 6...

Page 137: ...F3 CC2 T3 T1 COMP2 T2 F CM3 CC2 T1 C CC2 T3 T2 THERMOSTAT THERMOSTAT BC BC BC EM RD W1 STAT Y1 Y2 WH C G YL Y2 R C G R W1 TB1 PK GR Y1 BL O O OR 9 7 8 W2 W2 BR CF1 F CM1 C T2 T3 T1 T1 TB2 CCH CCHR 2 1 2 1 CCH1 CCH2 CCHR1 CCHR2 6 4 CCR SEE NOTE 3 SEE UNIT RATING PLATE FOR TYPE AND SIZE OF OVER CURRENT PROTECTION WIRE CODE BK BLACK BL BLUE BR BROWN GR GREEN OR ORANGE PK PINK PU PURPLE RD RED WH WHIT...

Page 138: ... MUST BE SAME SIZE AND TYPE OF INSULATION AS ORIGINAL USE COPPER CONDUCTORS ONLY 2 IF OPTIONAL ECONOMIZER IS INSTALLED REMOVE ECON SHRT PLM AND CONNECT ECON PLM TO ECON PLF BL BL SUPPLY LINE VOLTAGE 24 VAC TR1 2 2 3 TB3 LOW VOLTAGE TERMINAL BLOCK FOUR TERMINALS FOR 24VAC PWR RED WIRE AND SIX TERMINALS FOR 24VAC COM BLUE WIRE 4 CONNECTIONS SHOWN ARE FOR 1 STAGE HEAT OPERATION WHEN 2 STAGE OPERATION...

Page 139: ...E NOT DESIGNED FOR OTHER CONDUCTORS THE USE OF OTHER TYPE CONDUCTORS MAY CAUSE DAMAGE TO THE UNIT POWER DIAGRAM DCC300 6B GND RD BK OR L1 L2 L3 T1 T2 T3 L1 L2 L3 T1 T2 T3 EM GY BL YL RD BL YL BK OR GY RD BL YL BK OR GY F4 F5 F6 RD BK OR RD BK OR BC 1 BC 2 FB 2 YL 11 BK 1 BK 2 BK 3 YL 13 YL 12 GR 5 BLOW ER CON TACTOR COMPR ESSOR ELECTRONIC BLOW ER TIME DELAY R ELAY HIGH PRESSUR E SW ITCH POW ER DIS...

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