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AAON MUA II, Technical Manual

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AAON MUA II Technical Manual Download Page 8

 Technical Guide

MUA II Controller

8

24VAC

POWER

INPUT

Connect to

MUA

Controller Board

WARNING!!

Observe Polarity! All boards must be wired with GND-to-GND and 24VAC-to-24VAC.

Failure to observe polarity will result in damage to one or more of the boards. Expansion

Boards must be wired in such a way that power to both the expansion boards and the

controller are always powered together. Loss of power to the expansion board will cause the

controller to become inoperative until power is restored to the expansion board.

4RLY IO BD.

4RLY IO BD.

4RLY IO BD.

4RLY IO BD.

YS101790

YS101790

YS101790

YS101790

24V

AC

GND

Common

Common

Common

Common

Relay Output #10 - Configurable (N.O. Dry Contact)

Relay Output #6 - Configurable (N.O. Dry Contact)

Relay Output #14 - Configurable (N.O. Dry Contact)

Relay Output #18 - Configurable (N.O. Dry Contact)

Relay Output #11 - Configurable (N.O. Dry Contact)

Relay Output #7 - Configurable (N.O. Dry Contact)

Relay Output #15 - Configurable (N.O. Dry Contact)

Relay Output #19 - Configurable (N.O. Dry Contact)

Relay Output #12 - Configurable (N.O. Dry Contact)

Relay Output #8 - Configurable (N.O. Dry Contact)

Relay Output #16 - Configurable (N.O. Dry Contact)

Relay Output #20 - Configurable (N.O. Dry Contact)

Relay Output #13 - Configurable (N.O. Dry Contact)

Relay Output #9 - Configurable (N.O. Dry Contact)

Relay Output #17 - Configurable (N.O. Dry Contact)

Relay Output #21 - Configurable (N.O. Dry Contact)

Wiring Considerations

The expansion base boards must be connected to 24 VAC as shown in
the wiring diagram below. As noted below, the power requirement for a

two slot base board is 10 VA. A four slot base board requires 20 VA. Be
sure that the transformer used for powering the base boards meets these
minimums. See Figure 7 for complete wiring details.

Expansion Board Installation & Wiring

Figure 7: Expansion Board Wiring

Summary of Contents for MUA II

Page 1: ...MUA II Controller Technical Guide FACTORY CONTROLS SYSTEM ...

Page 2: ...t up Commissioning 12 Controller Addressing 12 Power Wiring 12 Initialization 13 Programming The Controller 13 Sequence Of Operations 14 MUA Operation Overview 14 MUA Modes 14 Initialization 16 MUA II Configuration Setup 16 Scheduling 17 Force Modes or Overrides 17 Internal Trend Logging 18 Troubleshooting 18 Using LED s To Verify Operation 18 Appendix 20 WattMaster Controls Inc 8500 NW River Park...

Page 3: ...additional relay outputs as required These expansion boards are installed on eithMUA II Controller board via a modular cable connection The available expansion board configurations allow for up to 16 additional binary relay outputs The various expansion boards connect to the expansion board base Jumpers must be set according to the board type installed Up to 4 Relay Output Expansion Boards can be ...

Page 4: ...R3 7805ACT VR5 VR6 7824CT 7824CT C1 PWR LD1 24VAC IN GND GND TB1 R19 PJ2 24VDC OUT R17 PJ1 R15 D1 D2 LM358N P82B715P C3 C2 CX3 U1 C4 C5 U2 R3 R14 R13 CX1 R2 R1 P1 JP1 CX2 P2 7824CT VR7 7824CT 4 SLOT MODULAR I O BD VR8 YS101782 C6 R5 R4 R6 P3 R9 R8 R7 JP3 C7 VR1 R18 R11 R16 R10 P4 JP4 R12 5 96 5 40 4 73 4 24 2 12 0 28 4 00 VR5 MC 7824CT C6 TB2 VR3 7805ACT R14 VR2 D3 7824CT MC MC VR4 7812CT MC GND 2...

Page 5: ...CX1 1 LD6 COMM PWR LD7 LED1 LED2 LD9 LD8 R1 U7 RV1 VREF ADJ R28 VREF 5 11V TEST POINT EWDOG D19 RN2 1 COM1 3 COM4 5 R5 R4 R3 R2 R1 RLY2 RLY3 RLY4 RLY5 CX15 1 MEG HH P1 C21 Figure 4 MUA II Controller Component Locations General The following inputs and outputs are available on the MUA II controller and or the relay expansion boards that can be added to the main control ler board expansion port For ...

Page 6: ... controller Re move the controller from its backplate Mark the control enclosure base using the backplate as a template Drill pilot holes in the enclosure base and secure the backplate to it using sheet metal screws Do not allow metal shavings to fall onto the circuit board Reattach the controller to the backplate Important Wiring Considerations Please carefully read and apply the following inform...

Page 7: ...24CT M TB4 R27 C13 R10 VR1 C19 C18 NE5090NPB3192 0PS U8 CX8 U9 X1 R7 D10 R13 D12 C7 CX10 U10 CX12 U12 U14 CX14 PJ3 PJ2 PJ1 EXPANSION PRESSURE SENSOR T STAT C17 D15 R26 C20 R25 R24 R22 U15 CX13 U13 C15 R19 R15 C14 D18 D17 PU1 PU2 PU3 PU4 PU5 PU7 D6 D7 D8 D9 D11 D14 C12 C10 0 5 VDC 0 1 VDC JP1 C11 X2 GND TB3 INPUTS GND GND VDC AIN1 AIN2 AIN3 AIN4 AIN5 AOUT1 AOUT2 AIN7 RN4 1 RN5 RS 485 CX5 U5 R TB1 S...

Page 8: ... Configurable N O Dry Contact Relay Output 11 Configurable N O Dry Contact Relay Output 7 Configurable N O Dry Contact Relay Output 15 Configurable N O Dry Contact Relay Output 19 Configurable N O Dry Contact Relay Output 12 Configurable N O Dry Contact Relay Output 8 Configurable N O Dry Contact Relay Output 16 Configurable N O Dry Contact Relay Output 20 Configurable N O Dry Contact Relay Output...

Page 9: ...ct The Supply Air Temperature Sensors are 10K Type III thermistor sen sors For systems that are only using the MUA II controller and are not supplied with The MODGAS II or MHGRV II controllers the Supply Air Temperature Sensor must be wired as shown in the illustration below for proper operation of the controller See Figure 9 for detailed sensor wiring The exception to this is when the MODGAS II a...

Page 10: ...dings will result Unused conduit opening s must have closure plugs installed and must be coated with sealing compound to provide raintight seal Water can damage sensor Wiring Details GND INPUTS GND AOUT1 AOUT2 GND VDC AIN1 AIN2 AIN3 AIN4 AIN5 AIN7 Outdoor Air Temperature Sensor Make Splice Connections Inside Sensor Enclosure As Shown Seal All Conduit Fittings With Silicone Sealant Mount Sensor Out...

Page 11: ... Conduit Fittings With Silicone Sealant MUA II Controller Board 250 Ohm Resistor Shipped With Sensor To be Installed Between AIN5 and GND The Pull up Resistor PU5 Must Be Removed When Using A 4 20ma Device If You Are Using The Standard Factory Supplied Humidity Sensor It Has Terminals Labeled H T1 And H T4 Terminal H T1 Is The Voltage Input And Should Be Connected To The Terminal Labeled VDC On Th...

Page 12: ...l result in damage to one or more of the boards Expansion Boards must be wired in such a way that power to both the expansion boards and the controller are always powered together Loss of power to the expansion board will cause the controller to become inoperative until power is restored to the expansion board Check all wiring leads at the terminal block for tightness Be sure that wire strands do ...

Page 13: ... The next step is programming the controller for your specific require ments In order to configure and program the MUA II controller you must have a central operators interface or a personal computer with the Prism computer front end software installed Two different central op erators interfaces are available for programming of the MUA II control ler You may use either the Modular Service Tool or ...

Page 14: ...re the dehumidification sequence will be initiated to bring the supply air dewpoint temperature within the required range and maintain it at that condition MUA Modes This controller has a total of 6 modes of operation that behave differ ently These are divided into 1 unoccupied mode and 5 occupied modes The operation of each of these modes is explained on the following pages Unoccupied In this mod...

Page 15: ...halpy to calculate the number of compressors needed to extract the moisture from the air At the same time the Reheat Control will be active to avoid over cooling Reheat Control The control can utilize a combination of different heating methods to reheat the supply air during dehumidification mode The following is the order the control will try to reheat de supply air 1 Unit Hot Gas Reheat Two kind...

Page 16: ...w Cutoff Temperature Heating Cooling Disabled Blower Operation For 3 Minutes Then Off After Temperature Protect is initiated and SAT rises 10 F above the Low Cutoff Temperature After Temperature Protect is initiated and SAT drops10 F below the High Cutoff Temperature Return to Normal Operation Initialization On system powerup a 30 second start up delay is performed where all default setpoints are ...

Page 17: ...holiday schedule with 2 start stop events This holiday schedule can be used for 14 different holiday periods One thing to be noted is that you cannot view the current time when you are viewing the MUAII controller with the Modular Service Tool or the System Manager You can however change the time on the MUA II controller through the Modular Service Tool or the System Manager If there is any doubt ...

Page 18: ...ot used for this controller application LED2 This is the diagnostic blink code LED It will light up and blink out diagnostic codes PWR LED Operations When the MUA II controller is powered up the PWR LED should light up and stay on continuously If it does not light up check to be sure that you have 24 VAC connected to the board that the wiring connections are tight and that they are wired for the c...

Page 19: ...er chip that must be replaced For driver chip replacement instructions please see the Orion Controls System Installation Troubleshooting Guide for more information or contact the factory for further assistance LED2 Diagnostic LED Operations When power is first applied LED2 is turned off for 5 seconds At this time LED2 will blink to indicate the setting of the address switch and then extinguish for...

Page 20: ...6164 3 160 82 8893 2 407 58 15385 3 100 84 8514 2 352 Thermistor Sensor Testing Instructions Use the resistance column to check the thermistor sensor while discon nected from the controllers not powered Use the voltage column to check sensors while connected to powered controllers Read voltage with meter set on DC volts Place the mi nus lead on GND terminal and the plus lead on the sensor input te...

Page 21: ...2 12 1 48 38 2 52 64 3 56 90 4 60 14 1 56 40 2 60 66 3 64 92 4 68 16 1 64 42 2 68 68 3 72 94 4 76 18 1 72 44 2 76 70 3 80 96 4 84 20 1 80 46 2 84 72 3 88 98 4 92 22 1 88 48 2 92 74 3 96 100 5 00 24 1 96 50 3 00 76 4 04 OE265 Relative Humidity Sensors Testing Instructions Use the voltage column to check the Humidity Sensor while connected to a powered controller Read the voltage with meter set on D...

Page 22: ...Technical Guide MUA II Controller 22 Notes ...

Page 23: ...VAV CAV Controller Technical Guide 23 Notes ...

Page 24: ...l rights reserved Copyright 2002 WattMaster Controls Inc 8500 NW River Park Drive Parkville Mo 64152 Phone 816 505 1100 www orioncontrols com Fax 816 505 1101 AAON Inc 2425 So Yukon Ave Tulsa OK 74107 2728 Ph 918 583 2266 Fax 918 583 6094 AAON Part No R08120 ...

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