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2

ComPac 9/04-12

How To Use
This Manual

This manual is intended to be a guide to Marvair's ComPac

®

 line of vertical air conditioners.  It

contains installation, troubleshooting, maintenance, warranty, and application information.  The
information contained in this manual is to be used by the installer as a guide only.  This manual  does
not supersede or circumvent any applicable national or local codes.

If you are installing the ComPac

®

 unit,  first read Chapter 1 and scan the entire manual before

beginning the installation as described in Chapter 2.  Chapter 1 contains general, descriptive
information and provides an overview which can speed up the installation process and simplify
troubleshooting.

If a malfunction occurs, follow this troubleshooting sequence:

1. Make sure you understand how the ComPac

®

 unit works (Chapters 1 & 3).

2. Identify and correct installation errors (Chapter 2).

3. Refer to the troubleshooting information in Chapter 4.

If you are still unable to correct the problem, contact the Factory at 1-800-841-7854 for additional
assistance.

Please read the following “Important Safety Precautions” before beginning any work.

1. USE CARE when LIFTING or TRANSPORTING equipment.

2. TRANSPORT the UNIT UPRIGHT.  Laying it down on its side may cause oil to leave the

compressor and breakage or damage to other components.

3. TURN ELECTRICAL POWER OFF AT THE breaker or fuse box BEFORE installing or

working on the equipment.  LINE VOLTAGES ARE HAZARDOUS or LETHAL.

4. OBSERVE and COMPLY with ALL applicable PLUMBING, ELECTRICAL, and BUILD-

ING CODES & ordinances.

5. SERVICE may be performed ONLY by QUALIFIED and EXPERIENCED PERSONS.

*  Wear safety goggles when servicing the refrigeration circuit
*  Beware of hot surfaces on refrigerant circuit components
*  Beware of sharp edges on sheet metal components
*  Use care when recovering or adding refrigerant

6. Use COMMON SENSE - BE SAFETY-CONSCIOUS

© 9/04  Marvair

®

 Div. Airxcel

®

, Inc.

Important
Safety
Precautions

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

Summary of Contents for Marvair ComPac I AVP20

Page 1: ...44 Maintenance 47 Warranty 48 ComPac I and ComPac II Air Conditioner Product Manual Vertical Wall Mount Air Conditioners with Front Control Box Panel Models AVP20 24 30 36 42 48 60 72 P 81024 9 04 12...

Page 2: ...leshooting information in Chapter 4 If you are still unable to correct the problem contact the Factory at 1 800 841 7854 for additional assistance Please read the following Important Safety Precaution...

Page 3: ...ionRequirements 23 2 3 InstallationMaterials 24 2 4 PortingandDuctWork 26 2 5 FreshAirHoodInstallation 27 2 6 BracketInstallation 27 2 7 MountingtheUnit 27 2 8 ElectricalConnections 28 Start Up 3 1 Ch...

Page 4: ...actors 17 3d TypicalElectricalSchematic ComPac IIA CModels20 60 withElectronicControlBoard 18 3e TypicalElectricalSchematic ComPac IA CModel72 19 3f TypicalElectricalSchematic ComPac IIA CModel72 20 F...

Page 5: ...xternalpanels Allunitshaveinternaldisconnects optionalon460V Dependinguponstateandlocalcode requirements thisfeaturemayeliminatetheneedforanexternalbreakerordisconnect TheComPac IA Chasa0 15 manualout...

Page 6: ...42 1650 1585 1520 1450 1360 48 1900 1830 1760 1700 1620 60 1900 1830 1760 1700 1620 72 2100 1950 1800 1730 1660 20 24 30 36 42 48 60 72 MODEL LBS KG LBS KG LBS KG LBS KG LBS KG LBS KG COMPAC I A C 274...

Page 7: ...152 mm 24 0 610 mm 42 0 1067mm 60 0 1524mm 78 0 1981mm FRESH AIR HOOD 1 5 38 mm K O S 2 0 51 mm MOUNTING HOLES CTR TO CTR HEATER ACCESS COVER DISCONNECT ACCESS COVER FRONT VIEW R H SIDE VIEW BACK VIEW...

Page 8: ...8 ComPac 9 04 12 Figure 1c ComPac I A C ComPac II A C Dimensions Models AVP72 in inches mm SLOTS IN COMPAC II ONLY SLOTS IN COMPAC II ONLY...

Page 9: ...EconomizerOperation ComPac IIA COnly The economizer is a regulated damper system with controls The damper regulates the circulationofoutsideairintotheenclosure whentheoutdoorairconditionsaresuitable...

Page 10: ...uetoalossofacooling Y callorthefirstfault theunit re startwillbedelayed3minutesfromthetimethecontactorisde energized Note There isnodelayonbreakifthelockoutconditionisreset Delay on Make Oninitialpowe...

Page 11: ...00 PSIG AVP60 setting is 450 PSIG This protects the unit if airflow through the condenserisblockedoriftheoutdoorfanmotorfails Althoughthecontactsofthehighpressureswitchclosewhentherefrigerantpressuref...

Page 12: ...o approximately 300 PSIG the system must be manually reset once the lockout relay is activated Amanualresetisnecessarytopreventharmfulshort cycling Toresetswitch turn primarypoweroff thenbackonorturnt...

Page 13: ...fstainlesssteel Hot Gas Bypass ComPac I A C Only Usedinspecialtyapplications i e MagneticResonanceImaging MRI buildings toprevent magneticvoltagedisturbancecausedbycompressorcycling Twohotgasbypassopt...

Page 14: ...rsareavailablefromMarvair Aflagtypedetectsareduction ofairflowonthedischargesideofthefilter Whenareductioninairflowisdetected asignal issenttoasetofdrycontacts Formorereliable preciseindicationofadirt...

Page 15: ...ED MOTORS SEE MOTOR NAMEPLATE FOR WIRE COLOR 3 TRANSFORMER IS FACTORY WIRED FOR 230 VOLT OPERATION FOR LOWER VOLTAGES INTERCHANGE ORANGE AND RED LEADS INSULATE UNUSED LEADS 4 OPTIONAL CRANKCASE HEATER...

Page 16: ...16 ComPac 9 04 12 Figure 3b Typical Electrical Schematic ComPac I A C Models AVP20 60 with Electronic Control Board 5 6 TRANSFORMER...

Page 17: ...RMER IS FACTORY WIRED FOR 230 VOLT OPERATION FOR LOWER VOLTAGES INTERCHANGE ORANGE AND RED LEADS INSULATE UNUSED LEADS 4 OPTIONAL FIELD INSTALLED 270 OHM MINIMUM POSITION POTENTIOMETER 5 CRANKCASE HEA...

Page 18: ...18 ComPac 9 04 12 5 TRANSFORMER Figure 3d Typical Electrical Schematic ComPac II A C Models AVP20 60 with Electronic Control Board...

Page 19: ...0 HZ 1 PH POWER SUPPLY SEE DATA PLATE FOR AMPACITY FUSE SIZE DISCONNECT SHOWN 2 SPEED TAP FOR MULTISPEED MOTORS SEE MOTOR NAMEPLATE FOR WIRE COLOR 3 TRANSFORMER IS FACTORY WIRED FOR 230 VOLT OPERATION...

Page 20: ...OR AMPACITY FUSE SIZE DISCONNECT SHOWN 2 SPEED TAP FOR MULTISPEED MOTORS SEE MOTOR NAMEPLATE FOR WIRE COLOR 3 TRANSFORMER IS FACTORY WIRED FOR 230 VOLT OPERATION FOR LOWER VOLTAGES INTERCHANGE ORANGE...

Page 21: ...lledbytheH205Aenthalpycontroloroptionaldrybulbsensor H205AEconomizerChangeoverControl TheH205Aenthalpycontrollerrespondstothetotalheatcontentoftheoutdoorairtoprovide changeovertooutsideairforfreecooli...

Page 22: ...optional Thecontrollermodulatesthepositionoftheoutsideairdamper inresponsetoinputfromthe enthalpyandmixedairsensors Thecontrollerisdesignedtomaintainthesupplyairtemperature between50 to56 Fbymixingwar...

Page 23: ...3 Completeandmailthewarrantyregistrationcard Youmustconsiderallofthefollowingwhenchoosingtheinstallationsite 1 Noise Installtheunitsothattheleastamountofnoisewillbetransmittedto inhabited spaces 2 Co...

Page 24: ...Supply Thepowersupplymusthavetheappropriatevoltage phase andampacityforthemodel selected Voltagemustbemaintainedaboveminimumspecifiedvalueslistedbelow Refer tothedatastickerontheunitforampacityrequire...

Page 25: ...itorforAVP20 36 FieldInstalled Not recommendedforscrollcompressors AdditionalItemsNeeded Additionalhardwareandmiscellaneoussupplies notfurnishedbyMarvair areneededfor installation Forexample thelistbe...

Page 26: ...ns using duct work should be designed and installed in accordance with all applicable safety codes and standards Marvair strongly recommends referring to the currenteditionoftheNationalFireProtectionA...

Page 27: ...theshelterwalltomatchthisopening Allowsufficient clearance torun3 4 conduitthroughtheholeandtotheunit 2 Usinganappropriateandsafeliftingdevice settheunitonthebottomsupportbracket mountedonthewall Youm...

Page 28: ...city for the selected model 1 SizetheincomingpowersupplylinesaccordingtoCoderequirements Runthepower conductorsthroughtheknockoutsonthewallsideoftheunit ortothoseadjacentto theelectricalcontrolbox Use...

Page 29: ...chofthesetpointscanbequicklyandeasily changedinthefieldbytheinstaller ItcanbeusedwithMarvair sComPac Ior IIunique verticalpackagedwallmountairconditionersorMarvair senvironmentalcontrolunits See Comms...

Page 30: ...ftheLL357D2 RemoteSignalling Terminals5 7ontheComPac A Cterminalboardaredrycontacts whichcanbeusedforremotesignallingintheeventofa ccutoffonloworhighpressurelimit Continuousfanoperation Forcontinuousi...

Page 31: ...T WITH HUMIDITY CONTROLLER G R W Y 2 4 6 8 10 1 3 5 7 9 4 WIRE WALL THERMOSTAT Four 4 Conductor Color Coded 18 Gauge Thermostat Cable Field Supplied COMPAC II A C TERMINAL BLOCK NOTE Terminals 5 7 are...

Page 32: ...CONTACTS DRY NO C SMOKE HP LP LOCKOUT CONTACTS DRY NO NC C INPUT FROM TERMINAL BOARD 3 2 1 THERMISTOR CONTACTS 4 FACTORY INSTALLED 1 24 VAC connections only 2 For immediate shutdown of air conditione...

Page 33: ...mponentcooleraerosolmaybe sprayeddirectlyintotheenthalpysensortosimulatelowenthalpyconditions causingthe economizerdampertoopen Alternately when outdoor conditions are lower than the set point a sourc...

Page 34: ...Allowtheunitstorunfor2to3minutesthencheckthetemperaturedifferentialbetween thereturnairandthesupplyairwithdigitalthermometer Thetemperaturedifferential shouldbebetween12and20degreesdependingonambientt...

Page 35: ...gparts etc Begin deeper analysis only after making this initial inspection The troubleshooting information in this manual is basic The troubleshooting section contains problem solution charts for gene...

Page 36: ...r shorts 4 Note voltage range limitations specific to the compressor troubleshooting section 1 Loss or restriction of airflow 2 Restriction in refrigerant circuit 3 Refrigerant overcharge following fi...

Page 37: ...oltage condition must be corrected 2 Running Amperage Connect a clip on type ammeter to the common lead to the compressor Turn on the supply voltage and energize the unit The compressor will initially...

Page 38: ...ultconditionwillopenthecontactorandshutdowntheunit The contactorontheunitthathasthefaultconditionmustbeclosedbeforethesecondfault conditioncanberecognizedbythecontrolboard Thecontactorontheunitwiththe...

Page 39: ...008 21 50419 50419 50419 50419 50419 50419 50419 50419 22 50214 50214 50214 50214 50214 50214 50214 50214 23 01257 01257 01257 01257 01257 01257 01257 01257 24 70063 70063 70063 70063 70063 70063 7006...

Page 40: ...26 6 2 26 40 17 19 28 27 3 6 AVP20 36 Control Box with Mechanical Relays Contactors AVP20 24 Control Box with Electronic Control Board AVP30 36 Control Box with Electronic Control Board 31 30 33 42 4...

Page 41: ...rol Box with Electronic Control Board 38 12 9 42 8 33 13 11 4 31 30 34 1 36 20 7 5 32 18 14 16 OFF ON ON OFF 6 37 22 24 27 28 19 3 21 17 2 10 2 40 17 37 19 28 27 3 26 6 2 40 26 37 17 19 27 28 3 6 AVP2...

Page 42: ...d the cabinet air reliefs for dirt or obstructions Remove foreign objects such as leaves paper etc Ifthecondensercoilisdirty itmaybewashedoffwithacommercialsolventintended for this purpose TURN OFF PO...

Page 43: ...iscoveredunderthiswarranty Marvairwillhonoritswarrantyandfurnishtherequired replacement part All costs for shipment and risk of loss during shipment of the product to Marvair and back to the owner sha...

Page 44: ...thout charge EXW Cordele Georgia the required replacement Any transportation related service labor diagnosis calls filter driers and refrigerant are not included The owner of the product may ship the...

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