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Marvair 8AA1024A-1060A & 8AA2036A-2060A I&O Manual

05/2023 Rev.3

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Содержание Marvair 8AA1024A-8AA1060A

Страница 1: ...STALLER Affix the instructions on the inside of the building adjacent to the thermostat END USER Retain this manual for future reference Marvair 8AA1024A 1060A 8AA2036A 2060A I O Manual 05 2023 Rev 3...

Страница 2: ...ng 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 equip...

Страница 3: ...building adjacent to the thermostat END USER Retain these instructions for future reference Table of Contents Chapter 1 Marvair Wall Mount Air Conditioner Description Specifications 1 1 General Descr...

Страница 4: ...ematic w Economizer Alternate Construction 14 Figure 1d Typical Electrical Schematic w Economizer Alternate Construction 15 Figure 1e Typical Electrical Schematic w Economizer Alternate Construction 1...

Страница 5: ...control board is in Section 1 6 All models are designed for easy installation and service Major components are accessible for service beneath external panels Allunitshaveinternaldisconnects optionalon...

Страница 6: ...2048A 1900 1850 1800 1700 1600 1500 1350 8AA2060A 1900 1850 1800 1700 1600 1500 1350 Values in bold are the minimum air flow Air flow ratings of 208 230 volt units are at 230v Air flow ratings of 460...

Страница 7: ...w EFS U Hard Start w Hot Gas Bypass V Hard Start w Low Ambient CCH EFS W Low Ambient w CCH X Hot Gas Bypass Y Low Ambient w CCH FCC Z Low Ambient w CCH EFS 1 Low Ambient w FCC 2 Low Ambient w FCC EFS...

Страница 8: ...ding upon the options selected the damper responds to the enthalpy of the outdoor air On a call for cooling from a space thermostat it operates as follows When the enthalpy of the outdoor air is below...

Страница 9: ...le to allow operation to 20 F 7 C or minus 20 F 29 C Please refer to Hot Gas Bypass Application Bulletin for details Electric Reheat Dehumidification Ahumiditycontrollerallowselectricheatandcoolingtoo...

Страница 10: ...use with higher efficiency filters with MERV ratings of 11 13 and 14 when tested to ASHRAE 52 2 Units with economizers have a pre filter on the outside air Lockable Disconnect Access Cover Plate The...

Страница 11: ...as primary power is available The heater drives liquid refrigerant from the crankcase and prevents loss of lubrication caused by oil dilution Power must be applied to the unit for 24 hours before star...

Страница 12: ...OMRPESSOR CONTACTOR CAPACITOR C COMP CCH DFS CC OUTDOOR AIR MOTOR OUTDOOR FAN MOTOR OUTDOOR FAN RELAY REVERSING VALVE SOLENOID OFM PLC RVS OFR OAM FAN CYCLE CONTROL RELAY FAN CYCLE CONTROL FCCR FCC RE...

Страница 13: ...CRANKCASE HEATER COMRPESSOR CONTACTOR CAPACITOR C COMP CCH DFS CC OUTDOOR AIR MOTOR OUTDOOR FAN MOTOR OUTDOOR FAN RELAY REVERSING VALVE SOLENOID OFM PLC RVS OFR OAM FAN CYCLE CONTROL RELAY FAN CYCLE...

Страница 14: ...14 Marvair 8AA1024A 1060A 8AA2036A 2060A I O Manual 05 2023 Rev 3 Figure 1c Typical Electrical Schematic w Economizer Alternate Construction...

Страница 15: ...Marvair 8AA1024A 1060A 8AA2036A 2060A I O Manual 05 2023 Rev 3 15 Figure 1d Typical Electrical Schematic w Economizer Alternate Construction...

Страница 16: ...16 Marvair 8AA1024A 1060A 8AA2036A 2060A I O Manual 05 2023 Rev 3 Figure 1e Typical Electrical Schematic w Economizer Alternate Construction...

Страница 17: ...ormation to the end user Special features include 2 Stage operation with varying speed control to optimize latent and sensible capacity built in remote communication Modbus for monitoring and or contr...

Страница 18: ...e 23 Control Board Power Indicator LED 2 2 Installation and Replacement The PCB is factory installed To install a replacement PCB use the six mounting holes along with the appropriate screw size to fi...

Страница 19: ...off delay in seconds 4 IBM Y1 Set 80 40 100 G Fan only and Y1 1st Stage Cooling Indoor Blower Speed Setting 5 IBM Y2 Set 100 40 100 Y2 2nd Stage Cooling Indoor Blower Speed Setting 6 OFM Select P P d...

Страница 20: ...ssureorhigh pressurelockout 6 OFM Select This setting allows the IBM Indoor Blower control signal to be configured for PWM or 0 10vdc control The default control output signal is PWM 7 OFM Set This is...

Страница 21: ...will default to compressor cooling if any sensor becomes disconnected or faulty ChangingtheECONOSelecttoN no willdisableeconomizeroperationandtheeconomizer function will be ignored 13 SensorType Thiss...

Страница 22: ...oftware Version Number The software version of the 92589 control board will be displayed on the seven segment display This is for informational purposes only 2 4 Operation Power The Marvair PCB requir...

Страница 23: ...t Pumps 5 0 Dehumidification Operation AC HP 5 1 Hot Gas Reheat 5 2 Electric Reheat 6 0 Refrigeration Protection 6 1 High Pressure lockout 6 2 Low Pressure Lockout Freeze Protection 6 3 Anti Short Cyc...

Страница 24: ...rity This means that in any combination involving the G input the speed associated to Fan Only will never take precedence The priority list from Highest to Lowest goes as follows 1 Y2 Request 2 Y1 Req...

Страница 25: ...il the switch reopens at 290 PSIG These outputs function as described until the Cooling setpoint is satisfied This is considered as ON OFF fan cycle control and the PSC motor will not modulate Note Si...

Страница 26: ...eed since Y2 has higher priority These outputs remain energized until the cooling setpoint is satisfied Once the setpoint is satisfied the Compressor and the Outdoor fan outputs are de energized The I...

Страница 27: ...ng the testing of the air conditioner at the factory the control board has been configured for the sensor type used in the system There should be no need to change the sensor configuration If an entha...

Страница 28: ...and provides a signal to the economizer controller for modulating the position of the damper The default supply air temperature is 55F in economizer cooling and is not adjustable A disconnected or fau...

Страница 29: ...itiate a defrost cycle based on the time selected in the control board configuration menu setting 8 The defrost time intervals selections are 30 60 and 90 minutes and the factory default setting is 30...

Страница 30: ...remain off as long as the request for W2 is active Once the request for W2 satisfies the compressor will be allowed to operate The default setting for SCKT is N No the electric heat and compressor wi...

Страница 31: ...perature of 80F and 115F Systems with PSC Outdoor Motors utilizes a Fan Cycle Switch which closes at 400 PSIG to energize the OFR outdoor fan relay to start the outdoor fan which runs until the switch...

Страница 32: ...e compressor goes off due to any fault emergency or if the cooling heat pump heating setpoint is satisfied a built in 3 minute timer locks the compressor for that respective circuit out This can be mo...

Страница 33: ...mode until the request for FC is satisfied Once satisfied the system will be allowed to return to economizer operation if conditions are favorable 7 4 LowVoltage Brownout The control board monitors th...

Страница 34: ...r will not start makes excessive noise or will not pump return the unit to the freight carrier 3 2 Installation Requirements General 1 Inspect unit for completeness Check for missing parts e g hardwar...

Страница 35: ...76 cm 18 inches 46 cm 24 inches 61 cm 6 inches 15 cm 1030A 1036A 2030A 2036A 30 inches 76 cm 18 inches 46 cm 24 inches 61 cm 6 inches 15 cm 1042A 1048A 1060A 2042A 2048A 2060A 30 inches 76 cm 30 inch...

Страница 36: ...On Auto change over Keypad lockout Non volatile program memory P N 50123 Digital thermostat 2 stage heat 2 stage cool 7 day programmable Fan switch Auto On Auto change over Status LED s Backlit displa...

Страница 37: ...ities have jurisdiction The information contained in this manual is intended for use by a qualified service agency that is experienced in such work is familiar with all precautions and safety procedur...

Страница 38: ...not use duct liner on inside of supply duct within 4 feet 122cm of the unit Galvanized metal duct extensions should be used to simplify connections to duct work and grilles Use fabric boots to prevent...

Страница 39: ...he wall You must stabilize the unit on the bracket with the lifting device or by some other means the bracket alone is not sufficient 3 Make sure that the duct flanges are properly aligned with the wa...

Страница 40: ...ystem with small critical refrigerant charges where the installation of gauges may be objectionable can be made by monitoring the temperature of the refrigerant lines at the compressor The temperature...

Страница 41: ...ower leads connected to the internal circuit breaker on one of the units only D Restore power and retest the phase step B When the voltage reads 0 the units are in phase E Turn off power and proceed L...

Страница 42: ...T A T S O M R E H T U S S R U C D R A O B L O R T N O C C A V H C A V 4 2 1 3 7 1 5 N P R I A V R A M L O R T N O C T A T S I D I M U H E D Figure 6a Humidistat Wiring to a Marvair Air Conditioner wi...

Страница 43: ...u a f n e g o r d y h a n o p u e d o m n o i t a l i t n e v k c a b d e e f s i h T C A V H d e t c e n n o c e h t m o r f g n i r o t i n o m s u t a t s r e z i m o n o c e r o f d e s u e r a s...

Страница 44: ...Equipped models only To check the system operation under different ambient conditions the air temperature and enthalpy sensors must be tricked When outdoor ambient condi tions are higher than the con...

Страница 45: ...ease exercise caution and good judgement when servicing the unit Use only safe and proven service techniques Use refrigeration goggles when servicing the refrigeration circuit WARNING The refrigerant...

Страница 46: ...compres sor troubleshooting section E Water on floor near unit 1 Obstruction in condensate line 2 Obstruction or leak in condensate pan 3 Unit is not level 1 Check for clog or restriction 2 Check pan...

Страница 47: ...nostic LED which indicates the lockout fault The control board will enter into and indicate lockout if either of the fault conditions LPS or HPS occur twice The contactor must be closed before the fir...

Страница 48: ...ing Condenser Periodicallyinspecttheoutdoorcondensercoilandthecabinetairreliefsfordirtorobstructions Remove foreign objects such as leaves paper etc If the condenser coil is dirty it may be washed off...

Страница 49: ...2 Damages caused by shipping accident abuse negligence misuse fire flood or Acts of God 3 Damages caused by operating or staging the unit in a corrosive environment 4 Damages caused by improper applic...

Страница 50: ...____________ Serial No ______________________________________________ B Pre Start Up Is there any shipping damage Yes No If so where ________________________________________________________________ Wi...

Страница 51: ...vg Voltage ___________ A voltage deviation greater than 2 with the unit running should be addressed and corrected Excess voltage deviation can cause the compressor to overheat and to operate inefficie...

Страница 52: ...______ ________ Heater Contactor Amps L1 ________ ________ Heater Contactor Amps L2 ________ ________ Heater Contactor Amps L3 ________ ________ E Cooling Mode Check Record Refrigerant Pressures Reche...

Страница 53: ..._______________________________ _________________________________________________________________________ _________________________________________________________________________ ____________________...

Страница 54: ...m clearance must extend on all sides of the supply duct for the first 3 feet 1 meter from the unit IMPORTANT Marvair requires a minimum of 1 25 4 mm from the surface of any supply ducts to combustible...

Страница 55: ...Install the two No 10 screws in the heater assembly plate 7 Install wire harness in hole provided in drain pan and then through filter bracket and then into control box 8 Wire the heater as shown in...

Страница 56: ...56 Marvair 8AA1024A 1060A 8AA2036A 2060A I O Manual 05 2023 Rev 3...

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