ACS Marbair VAA2030-2048-2060 Installation And Startup Download | Manualshive

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Marvair Scholar 2.0 I&S Manual 08/2021 Rev.2

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Fig 5. Typical Wiring Schematic for HP | 240V 3-Phase

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Summary of Contents for Marbair VAA2030-2048-2060

Page 1: ...0 VAA2030 2048 2060 2 to 5 Ton Cooling Capacity with 2 Stage Compressors WARNING SAFETY REQUIREMENTS If the information in these instructions are not followed exactly a fire may result causing propert...

Page 2: ...quipment Important SafetyPrecautions 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 resulting in DAMAGE...

Page 3: ...08 Assembly Disassembly Instructions 17 2 09 Snout Field Assembly Steps 23 2 10 Installation Through the Outside Wall 24 2 11 Electrical Condensate And Wet Heat Hook Ups 25 2 12 Remote Thermostat Ins...

Page 4: ...e 5 Dimension Between Scholar 2 0 Heat Pump or Air Conditioner Air Box and Finished Outside Wall for Outdoor Louver Collar Assembly Installation 24 Figure 6a Remote Wall Mounted Thermostat Wiring Deta...

Page 5: ...architectural louvers please refer to the Marvair brochure entitled Architectural Extruded Aluminum Louvers Marvair offers a full range of thermostats to meet virtually every requirement The unit can...

Page 6: ...rd Start P Hard Start w Low Ambient CCH R Crank Case Heater CCH 1 Low Ambient w FCC 2 Low Ambient w FCC EFS None 17 Indoor Air Quality Features D Dry Bulb Sensor E Dry Bulb Sensor w Dirty Filter G Dir...

Page 7: ...1195 44 08 1120 TOP VIEW SUPPLY 46 00 1168 33 00 838 34 11 866 34 08 866 13 00 330 RIGHT VIEW REAR VIEW RETURN ON BOTH SIDES 2 75 70 2 75 70 1 43 36 13 55 344 BOTTOM VIEW CABINET FRONT FRESH AIR EXHAU...

Page 8: ...2 0 I S Manual 04 2022 Rev 2 8 Dimensional Data 48 47 13 16 44 1 8 94 3 16 48 12 1 2 5 SUPPLY 34 7 8 12 15 16 33 46 ROOM EXHAUST RETURN Figure 3 VAA2060 Heat Pump and Air Conditioner w Plenum Base Di...

Page 9: ...added when 120 or 240 VAC coils are required B High and Low Refrigerant Pressure and Loss of Charge Switches These switches render the compressor and outdoor fan motor inoperative whenever the limits...

Page 10: ...04 THERMOSTATS AND SUB BASES A Thermostats for Air Conditioners and Heat Pumps with two stages heating 1 Digital 7 day 5 2 and 5 1 1 day programmable thermostat Two stage heat Two stage cool Manual or...

Page 11: ...x heat and minimum cool set points Adjustable temperature differential Remote sensor capable Keypad lock out Status LED F or C selectable For use with models VAIA only Marvair P N 50186 C Humidity Con...

Page 12: ...e Genie Lift or equivalent 2 02 INSPECTION UNPACKING HANDLING A The Scholar 2 0 series of heat pumps and air conditioners are shipped to the job site on 4x4 wood base framing and enclosed in shrink wr...

Page 13: ...MATION CONCERNING THIS EQUIPMENT 2 03 LOCATION SELECTION AND PREPARATION WARNING THE SCHOLAR 2 0 HEAT PUMP AND AIR CONDITIONER MUST BE INSTALLED IN CONFORMANCE WITH ALL APPLICABLE LOCAL AND NATIONAL E...

Page 14: ...wer requirements line sizing and fuse sizing is shown on data label on unit The power leads can enter the heat pump or air conditioner either through the bottom or rear The locations of the knockouts...

Page 15: ...items are to be completed prior to final installation A Remove the two shipping screws that are at the top and bottom of the front door B Open the front door for access to the lag bolts that hold the...

Page 16: ...galvanized steel with a minimum thickness of 019 Ductwork must be firmly attached secured and sealed to prevent air leakage Do not use duct liner on inside of supply duct within four feet of the unit...

Page 17: ...fset Be sure the surface is level or provisions are made to level the unit upon installation L If the outdoor air box was removed reinstall it prior before placing the Scholar 2 0 unit in its final po...

Page 18: ...NOTED DECIMAL FRACTIONAL ANGULAR Marv This drawing contains confidential infor information is not to be disclosed or uti Marvair a Division of AIRXCEL Inc 03 MAT L NA 2020 10 02 1 ECO REV DATE Last R...

Page 19: ...19 Marvair Scholar 2 0 I S Manual 04 2022 Rev 2 D Remove the screws securing the electrical panel covers...

Page 20: ...r Scholar 2 0 I S Manual 04 2022 Rev 2 20 E After removing the interior panel cover disconnect the wiring to the blower assembly and the four wires to the transformer F Disconnect the condensate drain...

Page 21: ...21 Marvair Scholar 2 0 I S Manual 04 2022 Rev 2 G Remove screws to separate upper and lower sections H Using a mechanical lifting device separate upper and lower sections...

Page 22: ...nit install the duct flanges and side panel grommets Scan this QR code to view a brief video demonstration of the Scholar unit separation procedure IMPORTANT TO SEPARATE SYSTEM THE FRONT DOORS EXTERNA...

Page 23: ...TDISCHARGEAIRUPPER DIVERTER 1 11 SMV15026X SNOUTDISCHARGEAIRLOWER DIVERTER 1 12 SMV15032X SNOUTFRESHAIRINLETDUCT 2 13 SMV15028X SNOUTDISCHARGEAIRLOWER DIVERTER 1 14 SMV15029X SNOUTDISCHARGEAIRUPPER DI...

Page 24: ...ul to clear the appropriate stubouts The heat pump or air conditioner when installed properly should have a clearance between the air box outside edge and the finished outside wall as shown in Figure...

Page 25: ...r see Appendix E at end of this manual 2 11 ELECTRICAL CONDENSATE AND WET HEAT HOOK UPS WARNING ALL ELECTRICAL PLUMBING AND REFRIGERATION WORK MUST MEET THE REQUIREMENTS OF LOCAL AND NATIONAL CODES AN...

Page 26: ...ystem Verification of proper rotation is made by observing that the suction pressure drops and the discharge pressure rises when the compressor is energized An alternate method of verification for sel...

Page 27: ...n the Scholar 2 0 heat pump or air conditioner in accordance with Figure 9 and in accordance with the thermostat instructions National Electric Code and with local electrical codes where they prevail...

Page 28: ...ch The unit control system is factory wired to operate upon an input signal from any appropriate 24 VAC control thermostat or DDC control system The unit control system is factory wired to energize th...

Page 29: ...rip The other lead is connected to HUM on PLC as noted on the wiring schematic of the heat pump G There is a factory supplied plastic drain hose that is left loose in the bottom of the fresh air secti...

Page 30: ...1 A2 1 11 50063 TRANSFORMER 1 14 70049 MOTOR SPEED CONTROL 1 15 80611 2X4 BOX FOR FAN SPEED CONTOLLER 1 16 50503 DIN RAIL 1 17 81228 TERMINAL BLOCK BLUE 2 COND 4 18 81226 END STOP WAGO 9 19 81236 TERM...

Page 31: ...ED SCALE 1 10 WEIGHT REV DWG NO D SIZE TITLE NAME DATE COMMENTS Q A MFG APPR ENG APPR CHECKED DRAWN FINISH MATERIAL INTERPRET GEOMETRIC TOLERANCING PER DIMENSIONS ARE IN INCHES TOLERANCES FRACTIONAL A...

Page 32: ...damper and PowerVent Fresh Air Systems The two position open closed ventilation module is equipped with a motorized damper and pressure relief and provides up to 450 cfm of outside air The damper posi...

Page 33: ...nditioner PLC Programmable Logic Controller Microprocessor Essential to the operation of the Scholar 2 0 heat pump and air conditioner is a factory installed PLC microprocessor The PLC controller impr...

Page 34: ...OWN Scroll Down Decrease Modify a Value 3 RIGHT Move Cursor Right In Edit Mode Back to Next Menu Page 4 LEFT Move Cursor Left In Edit Mode Go Back to Previous Menu Page Press and Hold to Exit Edit Mod...

Page 35: ...g ASCT TIMER Preset values and can be changed default of 3 minutes and with the lowest time of 3 seconds From there the rest of preset are in 1 minute increments all the way up to 10 minutes DEFROST T...

Page 36: ...Control Box STEP 1 Insert small flat tip screwdriver into the center of the hole on the Exhaust Motor Speed controller seen in Figure 9 Electrical Control Box STEP 2 Turn Clockwise Right to increase...

Page 37: ...ernal humidity controller operates the Scholar to control the humidity in the classroom EHDD Electric Heat During Defrost Allows the user to select whether electric heat operates when the heat pump en...

Page 38: ...e system the thermostat calls for cooling by turning on the G Y and O inputs to the system the Blower will run at Y1 speed settable on the PLC screen If 2nd stage signal is requested the blower will r...

Page 39: ...off and the HC Output will be on Refer to the following table G Y W2 ODS SCKT IBM CC OFM HTR ON OFF OFF OFF OFF ON OFF OFF OFF ON ON OFF OFF OFF ON ON ON OFF ON ON ON OFF OFF ON ON ON OFF ON ON ON ON...

Page 40: ...is accumulated Ex if the 30min defrost time is selected that is the time it will take to go into defrost mode While in defrost if the defrost function is interrupted by a power outage or a sequence th...

Page 41: ...PS comes on during the first three minutes bypass time of operation In other words the compressor will start and operate for three minutes even with the LPS switch open Once the bypass timer has elaps...

Page 42: ...f jumper is in place or tied into external control Reheat disabled X X If jumper is in place or tied into external control Reheat disabled DFC X X Indicates that this function should be on 1 Outdoor T...

Page 43: ...10 0 0 100 Default MARVAIR VDA UNIT BACNET POINTS Read Write Read Only BACnet Input Boolean Points BACnet Output Boolean Points G IN CC Y IN HC Y2 IN IBM O IN OFM W2 IN RVS HUM IN RHS VENT IN OAM EMS...

Page 44: ...re development system A BACnet IP network with B AAC profile Concurrent communication of different protocols using the same Ethernet port is allowed use of a web browser in addition to another Etherne...

Page 45: ...ATH SERIOUS INJURY OR EQUIPMENT DAMAGE 4 Bridge EcoStruxure Machine Expert HVAC software allows monitoring of Modbus RTU slaves where M172P controller is the master Modbus RTU In a EcoStruxure Machine...

Page 46: ...SCHOLAR 2 0 models with two stage compressors only the cooling mode operates in two stages Mechanical heating compressor is a single stage as is the dehumidification mode 1 Turn the disconnect in the...

Page 47: ...same time c Lowering the set point slowly should turn the electric heat off The indoor blower will turn off 90 seconds later 8 Automatic Changeover For an automatic changeover remote thermostat the pr...

Page 48: ...Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 48 APPENDIX A WIRING DIAGRAMS Fig 1 Typical Wiring Schematic for 2T 5T A C 240V 1 Phase w GreenCube...

Page 49: ...49 Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 Fig 2 Typical Wiring Schematic for A C 240V 3 Ph Power w GreenCube Hot Gas Reheat BacNet...

Page 50: ...Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 50 Fig 3 Typical Wiring Schematic for A C 460V 3 Phase w GreenCube Hot Gas Reheat BacNet...

Page 51: ...51 Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 Fig 4 Typical Wiring Schematic for HP 240V 1 Phase...

Page 52: ...Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 52 Fig 5 Typical Wiring Schematic for HP 240V 3 Phase...

Page 53: ...53 Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 Fig 6 Typical Wiring Schematic for 11EER HP 40V 3 Phase...

Page 54: ...Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 54 Fig 7 Typical Wiring Schematic for HP 460V 3 Phase...

Page 55: ...55 Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 Fig 8 Typical Wiring Schematic for 5 Ton HP 460V 3 Phase...

Page 56: ...Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 56 Fig 9 Typical Wiring Schematic for HP 240V 1 Phase w GreenCube Hot Gas Reheat BacNet...

Page 57: ...57 Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 Fig 10 Typical Wiring Schematic for HP 240V 3 Phase w GreenCube Hot Gas Reheat BacNet...

Page 58: ...Marvair Scholar 2 0 I S Manual 08 2021 Rev 2 58 Fig 11 Typical Wiring Schematic for HP 460V 3 Phase w GreenCube Hot Gas Reheat BacNet...

Page 59: ...per unit Size Type MERV1 Rating Return Air Filter 2 46 x 24 x 2 Pleaded disposable 72 Fresh Air Ventilation Filter 1 12 x 20 x 1 Fiberglass disposable N A Exhaust Air Ventilation Filter 1 12 x 20 x 1...

Page 60: ...VISIBLE AND CONCEALED DAMAGE ALL DAMAGE MUST BE REPORTED TO THE FREIGHT CARRIER WITHIN 15 DAYS ON THE FREIGHT CARRIER S FORM The label on the base stand identifies the part number of the base stand B...

Page 61: ...e sure that the wall opening for the Scholar 2 0 heat pump and air conditioner air box is located properly taking the height of the base stand into account before proceeding to install the base stand...

Page 62: ...e air box through the wall opening and maintaining clearance between the plenum as appropriate and the ceiling The Scholar 2 0 heat pump aligns and rests on the base stand After the cabinet is resting...

Page 63: ...TO THE FREIGHT CARRIER WITHIN 15 DAYS ON THE FREIGHT CARRIER S FORM WARNING THIS EQUIPMENT MUST BE INSTALLED IN CONFORMANCE WITH ALL APPLICABLE LOCAL AND NATIONAL ELECTRICAL PLUMBING AND BUILDING COD...

Page 64: ...r the front panel has been removed lift the plenum onto the top of the Scholar 2 0 unit WARNING THE PLENUM IS HEAVY USE CARE WHEN PLACING THE PLENUM ON TOP OF THE SCHOLAR 2 0 HEAT PUMP OR AIR CONDITIO...

Page 65: ...nd standards 90A and 90B The duct system must be engineered to insure sufficient air flow through the unit to prevent over heating of the heater element This includes proper supply duct sizing suffici...

Page 66: ...to protect the surfaces from damage Leave the film on the painted surfaces until the strips have been installed and construction work in the area is completed IMPORTANT IMMEDIATELY UPON RECEIPT INSPEC...

Page 67: ...ssemblies louvers and collars are suitable for all Scholar 2 0 units Part Number Description 93206 Clear anodized louver collar assembly 93206 BRZ Dark bronze louver collar assembly To minimize damage...

Page 68: ...D COLLAR A Louver Collar Assembly The preassembled louver collar is fastened from the outside of the building in one assembly 1 The louver collar assembly is fastened directly to the air box as shown...

Page 69: ...ce and provides excellent aesthetics 3 When the outside air box extends beyond the outside wall then the louver 2 is used The collar 3 can be selected to provide a finished trim appearance to the wall...

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