FACTORY CONTROLS SYSTEM. MUA II Controller Technical Guide

Transcription

1 FACTORY CONTROLS SYSTEM MUA II Controller Technical Guide

2 Table Of Contents Controller Overview... 3 Features... 3 Controller Inputs and Outputs... 5 General... 5 MUA II Controller Analog Inputs:... 5 Controller Installation & Wiring... 6 General... 6 Controller Mounting... 6 MUA Controller Relay Outputs... 6 Expansion Board Relay Outputs... 6 Important Wiring Considerations... 6 Expansion Board Installation & Wiring... 7 Jumper Settings... 7 Wiring Considerations... 8 Wiring Details... 9 Space Temperature Sensor... 9 Supply Air Temperature Sensor... 9 Outside Air Temperature Sensor... 0 Remote Occupied Contact... 0 Outside Air Humidity Sensor... Space Humidity Sensor... Fan Proof Of Flow Switch... Start-up & Commissioning... 2 Controller Addressing... 2 Power Wiring... 2 Initialization:... 3 Programming The Controller... 3 Sequence Of Operations... 4 MUA Operation Overview... 4 MUA Modes... 4 Initialization... 6 MUA II Configuration & Setup... 6 Scheduling... 7 Force Modes or Overrides... 7 Internal Trend Logging... 8 Troubleshooting... 8 Using LED s To Verify Operation... 8 Appendix WattMaster Controls Inc NW River Park Drive Parkville, MO 6452 Toll Free Phone: PH: (86) FAX: (86) mail@wattmaster.com Visit our web site at Form: AO-MUAII-TGD-0A Copyright 2002 WattMaster Controls, Inc. AAON is a registered trademark of AAON, Inc., Tulsa, OK. WattMaster Controls, Inc. assumes no responsibility for errors, or omissions. This document is subject to change without notice.

3 Controller Overview Features The MUA II Controller Board is designed with 5 usable analog inputs, and 5 relay outputs. The controllers input and output capabilities can be expanded by use of either 2 slot or 4 slot expansion boards that plug into the MUA II Controller by means of a modular cable. The MUA II Controller is designed for used with Makeup Air HVAC units. Features include the following: Up to 8 Stages of Cooling (4 on board, 4 more with expansion board) Up to 8 Stages of Heating (4 on board, 4 more with expansion board) External Modulating Heat Fan Proving Interlock Supply Air Setpoint Reset From Temperature Input Dewpoint Setpoint Reset From Humidity Input De-Humidification Capable Technical Guide 7 Day, 2 Event per Day Scheduler Built In 4 Day Holiday Scheduler Built In Internal Trend Logging Direct Connection With MODGAS II And REHEAT II Controllers Most makeup air control configurations can be configured with the standard MUA II Controller. If the application requires more outputs, optional relay expansion boards are available from the factory to provide for 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 6 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 installed on the expansion base board connected to the controller. Accepts Remote Occupied Signal.20 Dia. Typ. of C2 RN CX U CX2 U2 U3 CX3 U4 CX4 D TB COMM RLY V T SHLD R CX5 LD6 COMM LD7 PWR LD8 LED LD9 LED2 R RN3 U5 RS-485 COMM P +VREF 5.V HH C RAM U6 EPROM TUC-5R PLUS ( MEG) YS086 REV. 2 CX6 PAL RN2 RLY4 RLY3 RLY2 D5 D4 D3 D2 COM-3 R R2 R3 R4 R5 COM4-5 V2 V3 TB2 U7 TEST POINT C2 V4 7.3 INPUTS TB3 PJ RV VREF ADJ +VDC AIN AIN2 AIN3 AIN4 AIN5 C0 AOUT AOUT2 AIN7 RN5 PRESSURE SENSOR C7 C2 EWDOG R26 D5 C20 R28 PJ2 EXPANSION PU D6 PU2 D7 PU3 D8 PU4 D9 PU5 D PU7 D4 ADDRESS U3 SW 0-5 VDC 0- VDC CX3 U5 CX5 ADD TOKEN NETWORK JP PJ3 X2 C4 C5 R5 R9 R22 R24 R25 C U0 U4 D7 C3 CX0 U2 CX4 D8 CX2 C8 T'STAT X RN4 U9 D0 VR C7 D2 R3 SC C9 R7 D9 RLY5 L VR2 D3 CX8 R0 D6 R R27 V6 R6 C9 U8 POWER U C3 C6 V5 TB4 24VAC Figure : MUA II Controller Dimensions MUA II Controller 3

4 TB TB2 C8 PJ PJ2 LD PWR 24VAC-IN R5 R7 +24VDC-OUT R9 C VR2 CX3 VR3 U C2 C3 VR4 U2 C4 C5 VR5 VR6 JP2 4RLY IO BD. YS0790 K K2 K3 K4 RN TL HA AN ID U U2 CX3 Technical Guide Controller Overview CT K4 V V4 TB OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC K 4.00 K3 OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC K PCF8574P 74HC04N ULN2803A/ PHILIPS CX P CX2 U3 D3 R20 LM358N P82B75P P JP CX P2 CX2 R4 R5 R6 C6 VR7 P3 JP3 R7 R8 R9 C7 VR8 P4 JP4 R6 VR 4 SLOT MODULAR I/O BD. YS0782 R TB TB2 C VR3 MC MC MC 782CT 7805ACT 7824CT ACT 782CT R4 R3 D2 D R2 R R3 VR5 7824CT MC MC 7824CT 7824CT 7824CT 7824CT CT R2 R R0 D3 R4 LM358N PJ R9 R PJ2 +24VDC-OUT LD PWR 24VAC-IN VR2 VR4 CX3 R3 C C2 C3 U D D2R7 R8 P82B75P CX R R2 R3 P JP VR6 C4 C5 2 SLOT MODULAR I/O YS0780 U2 VR CX2 R0 R4 R5 R2 R6 P2 JP2 2 Slot Expansion Base Board Figure 2: Expansion Base Boards Dimensions 4 Slot Expansion Base Board Figure 3: Relay Expansion Board Dimensions 4 MUA II Controller

5 Modular Service Tool - Mini Din Connector Typical Pin Indicator RAM Chip EPROM Chip PAL Chip Mounting Hole Typ of 4 C2 RN CX U CX2 U2 U3 CX3 U4 CX4 D Mounting Backplate RS-485 Communications Loop Connection RS-485 Communications Driver Chip Comm LED Power LED Diagnostic Blink Code LED Not Used Pull-up Resistors For Analog Inputs Analog Input And Output Terminal Block Pressure Sensor (AIN6 Modular Connection) TB COMM INPUTS TB3 T SHLD R CX5 U5 LD6 COMM RS-485 COMM LD7 PWR HH LD8 LED C LD9 LED2 P +VREF R 5.V U7 TEST POINT RV EWDOG VREF ADJ R28 PJ RN3 +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 RN5 C0 PRESSURE SENSOR C7 C2 R26 D5 C20 PJ2 EXPANSION PU D6 PU2 D7 PU3 D8 PU4 D9 PU5 D PU7 D4 ADDRESS U3 RAM SW U6 0-5 VDC 0- VDC CX3 U5 CX5 ADD TOKEN NETWORK JP PJ3 X2 C4 C5 R5 R9 R22 R24 R25 EPROM TUC-5R PLUS YS086 REV. 2 C U0 U4 C2 D7 C3 ( MEG) CX0 U2 CX4 D8 CX6 CX2 C8 T'STAT X RN4 U9 VR PAL D0 RN2 C7 D2 R3 SC C9 R7 D9 RLY RLY2 RLY3 RLY4 RLY5 D2 D3 D4 D5 L VR2 D3 CX8 R0 D6 R COM-3 R27 V6 R6 R R2 R3 C9 R4 R5 COM4-5 U8 POWER U C3 C6 V V2 V3 V4 V5 TB2 TB4 24VAC Relay Output Terminal Block Address Switch EEPROM 24 VAC Power Input Expansion Board (Modular Connection) Figure 4: MUA II Controller Component Locations Not Used Real Time Clock Chip Controller Inputs and Outputs 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 controller board expansion port. For component locations of the inputs on the MUA II Controller see Figure 4. For wiring of inputs and outputs see Figure 5 and 6. MUA II Controller Analog Inputs: Input #: Reset Temperature Sensor A space temperature sensor can be connected here and used for modulation of the Supply Air Setpoint. At a specified Space Temperature Setpoint the Supply Air Setpoint will be reset towards the Maximum Supply Air Temperature Setpoint VAV/CAV Controller Input #2: Supply Air Temperature The Supply Air Temperature sensor is connected to this input. This sensor is used to control heating and cooling staging. Input #3: Remote Occupied Contact This input can be configured to monitor a contact closure from another building automation system, that indicates that the equipment should be operating in the occupied mode. If the remote occupied signal is being monitored, you must program all the internal schedules to be zero for both the start and stop times on every day of the week. 5

6 Controller Inputs and Outputs Input #4 - Outdoor Air Temperature The Outdoor Air Temperature Sensor is connected to this input. The Outdoor Air Temperature Sensor is used to initiate the heating, cooling and vent modes of operation. It is also used in combination with the outdoor air humidity to calculate the Dewpoint Temperature. Input #5 - Outdoor Air Humidity This input is used for an Outdoor Air Humidity sensor that, combined with the outdoor air temperature, is used to calculate a Dewpoint Temperature for the purpose of dehumidification. Input #6 - Not Used Input #7 - Fan Proof of Flow Switch or Reset Humidity Sensor A Proof of Flow Switch that provides a contact closure whenever the fan is moving air, can be monitored on this input. If this contact opens while the fan is on, all heating and cooling is suspended. This is an optional item. If a switch is installed, the user must configure the MUA II to utilize the signal. If this option is not configured the unit will default to reset humidity input. An indoor Humidity Sensor can be installed on this input instead of the Proof of Flow Switch. This extra Humidity Sensor is used to provide for reset of the Dewpoint setpoint Relay Outputs Relay # - Fan (Enable) This is a non-configurable output. Relay #2 - #5 Configurable Relays These relays are located on the MUA Controller. Configuration order and options are the same as for relays #6 -#2 as outlined in the information for these relays that follows. Relay #6 #2 Configurable Relays These relays are available by using Relay Expansion boards connected to the MUA II controller. Relays can be configured in any order but we recommend that they be configured in the following order:. Heating (aux. heating) stages 2. Cooling (compressor) stages 3. Gas Reheat Control for De-Humidification 4. External Heat Enable You can have up to 8 stages of Heating (aux. heating) and 8 stages of Cooling (compressors) as well as individual relays assigned to options 3 and 4 above. Analog Output AOUT The MUA II controller has Analog Output available. The usable output is located at terminal AOUTand is used for controlling an external heating device. Voltage ranges for this output are user configurable for either a 0-0 VDC or 2-0 VDC signal. Controller Installation & Wiring General Correct wiring of the MUA II controller is the most important factor in the overall success of the controller installation process. In general most MUA II controllers are factory installed and wired at the AAON factory. It is also possible to purchase these controllers directly from WattMaster Controls for installation in the field. Some of the following information pertains to field wiring and may not apply to your installation since it was pre-wired at the factory. However, in the unlikely event that troubleshooting of the controller is required, it is a good idea to be familiar with the system wiring, no matter if it was factory or field wired. Controller Mounting When the controller is to be field mounted, it is important to mount the controller in a location that is free from extreme high or low temperatures, moisture dust and dirt. It is recommended that it be installed in the HVAC unit control panel. If this is not practical, it should be mounted in a separate control enclosure that is weathertight. Be careful not to damage the electronic components when mounting the controller. Remove 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 information when wiring the MUA II controller. See Figure 5 for MUA II controller wiring diagram.. All 24 VAC wiring must be connected so that all ground wires remain common. Failure to follow this procedure can result in damage to the controller and connected devices. 2. All wiring is to be in accordance with local and national electrical codes and specifications. 3. Minimum wire size for 24 VAC wiring should be 8 gauge. 4. Minimum wire size for all sensors should be 24 gauge. Some sensors require 2 conductor wire and some require 3 conductor. 5. Be sure that all wiring connections are properly inserted and tightened into the terminal blocks. Do not allow wire strands to stick out and touch adjoining terminals which could potentially cause a short circuit. 6 MUA II Controller

7 TB V4 V K4 K K2 K3 PHILIPS CX2 P CX Technical Guide 6. When communication wiring is to be used to interconnect controllers together or to connect to other communication devices, all wiring must be minimum 8 gauge, 2 conductor, twisted pair with shield. 7. Before applying power to the MUA II controller, be sure to recheck all wiring connections and terminations thoroughly. Connect To Next Controller And/Or MiniLink PD On Local Loop For Stand Alone Applications Connect To System Manager MUA II Controller All Comm Loop Wiring Is Straight Thru TtoT RtoR SHLD to SHLD Local Loop RS Baud Analog Inputs See Individual Sensor Wiring Diagrams For Detailed Sensor Wiring 0-0 VDC 0r 2-0 VDC Connect To External Heat Device If Used + _ TB COMM LD6 TB3 R INPUTS T SHLD R COMM LD7 PWR LD8 LED LD9 LED2 PJ C2 CX5 RN RN3 PRESSURE SENSOR +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 RN5 C0 C7 U5 U7 TEST POINT RV VREF ADJ CX RS-485 COMM P +VREF 5.V C2 R26 U EWDOG D5 C20 C R28 PJ2 EXPANSION HH PU D6 PU2 D7 PU3 D8 PU4 D9 PU5 D PU7 D4 ADDRESS U3 CX2 U2 RAM PHILIPS SW CX3 U5 U6 0-5 VDC 0- VDC CX5 ADD TOKEN NETWORK JP PJ3 X2 C4 C5 R5 R9 R22 R24 R25 U3 EPROM TUC-5R PLUS YS086 REV. 2 C U0 U4 C2 D7 C3 ( MEG) CX0 U2 CX4 D8 CX6 C8 CX3 CX2 T'STAT X RN4 U4 U9 D0 VR CX4 PAL RN2 C7 D2 R3 R7 SC D9 C9 RLY RLY2 RLY3 RLY4 RLY5 D D2 D3 D4 D5 Connect To Expansion Board Base (When Used) L 7824CT VR2 D3 M CX8 R0 D6 R COM-3 COM4-5 V6 R C9 MC34064A R27 R R2 R3 R4 R5 U8 U POWER C3 C6 V V2 V3 V4 V5 TB2 NE5090NPB392 0PS TB4 24VAC R - 24VAC G - Fan ON/OFF Only Relay Output Dry Contacts R2 Thru R5 May Be User Configured For The Following: - Heating (Aux. Heating)Stages 2 - Cooling (Compressor) Stages 3 - Gas Reheat Control For Dehumidification 4 - External Heat Enable Note: Up To 6 More Relays Are Available By Adding Relay Expansion Boards. All Expansion Board Relay Outputs Are User Configurable As Listed Above. Line Voltage 24VAC Required VA For Transformer = 8VA Warning: 24 VAC Must Be Connected So That All Ground Wires Remain Common. Failure To Do So Will Result In Damage To The Controllers. Figure 5: MUA II Controller Wiring Note: All Temperature Sensors Must Be Thermistor Type III Which Provide 0K Ohms Deg. F Expansion Board Installation & Wiring Jumper Settings 4 Relay Output Expansion Board The expansion boards are connected to the MUA II Controller with a modular cable. Up to 2 Expansion Base Boards can be populated with expansion boards to provide additional inputs and outputs. The expansion boards can be placed on the expansion base board in any order, however, the jumpers on the Expansion Base Board must be set correctly for proper operation. See Figure 6 for correct jumper settings and jumper locations. Relay Outputs - 6 Through 2 N.O. Contact #6 - Configurable N.O. Contact #7 - Configurable N.O. Contact #8 - Configurable N.O. Contact #9 - Configurable Common OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC 4RLY IO BD. OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC OMRON G5L-4P-PS 24VDC CONTACT: UL 5A250VAC YS0790 K K2 K3 K4 RN ULN2803A/ 74HC04N PCF8574P Address Jumpers Relays 6-9 Relays 0-3 Relays 4-7 Relays 8-2 TL HA AN ID U U2 Jumpers Under Expansion Board To Be Set As Shown Figure 6: Expansion Board Jumper Settings VAV/CAV Controller 7

8 24VAC Technical Guide Expansion Board Installation & Wiring 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 0 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. WARNING!! Observe Polarity! All boards must be wired with -to- 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. 24VAC POWER INPUT Connect to MUA Controller Board Relay Output #6 - Configurable (N.O. Dry Contact) Relay Output #7 - Configurable (N.O. Dry Contact) Relay Output #8 - Configurable (N.O. Dry Contact) Relay Output #9 - Configurable (N.O. Dry Contact) Common 4RLY IO BD. YS0790 Relay Output #0 - Configurable (N.O. Dry Contact) Relay Output # - Configurable (N.O. Dry Contact) Relay Output #2 - Configurable (N.O. Dry Contact) Relay Output #3 - Configurable (N.O. Dry Contact) Common 4RLY IO BD. YS0790 Relay Output #4 - Configurable (N.O. Dry Contact) Relay Output #5 - Configurable (N.O. Dry Contact) Relay Output #6 - Configurable (N.O. Dry Contact) Relay Output #7 - Configurable (N.O. Dry Contact) Common 4RLY IO BD. YS0790 Relay Output #8 - Configurable (N.O. Dry Contact) Relay Output #9 - Configurable (N.O. Dry Contact) Relay Output #20 - Configurable (N.O. Dry Contact) Relay Output #2 - Configurable (N.O. Dry Contact) Common 4RLY IO BD. YS0790 Figure 7: Expansion Board Wiring 8 MUA II Controller

9 Wiring Details Space Temperature Sensor A Space Temperature Sensor is used with the MUA II controller to provide for Supply Air Temperature Reset. At a specified Space Temperature Setpoint the Supply Air Setpoint will be reset towards the Technical Guide Maximum Supply Air Temperature Setpoint. For more information on the operation of this sequence see the Sequence Of Operation section of this manual. This sensor is a 0K Type III thermistor sensor. See Figure 8 for complete sensor wiring details. Space Temperature Sensor TMP INPUTS +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 MUA II Unit Controller Board Figure 8: Space Temperature Sensor Wiring Supply Air Temperature Sensor The Supply Air Temperature Sensor should be mounted in the unit discharge plenum or in the supply air duct. The Supply Air Temperature Sensors are 0K Type III thermistor sensors. 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 and/or the MHGRV II controllers are also being used on the HVAC unit the MUA II controller is installed on. See the Caution note regarding this configuartion that follows. Caution: If your HVAC unit is supplied with the MODGAS II controller with or without an MHGRV II controller, the Supply Air Temperature Sensor must always be wired to the MODGAS II controller. If your HVAC unit is supplied with only the MHGRV II controller, the SupplyAir Temperature Sensor must be connected to the MHGRV II controller, not the MUA II controller. If you have either of these controllers on your HVAC unit and connect the Supply Air Temperature Sensor to the MUA II controller, your controls will not function correctly. See the MODGAS II and/or the MHGRV II Technical Guide(s) for Supply Air Temperature Sensor wiring terminations and information. Supply Air Temperature Sensor Mount In MUA Unit Supply Air Duct INPUTS +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 MUA II Controller Board Figure 9: Supply Air Temperature Sensor Wiring VAV/CAV Controller 9

10 Wiring Details Technical Guide Outside Air Temperature Sensor The Outside Air Sensor must be wired as shown in the illustration below for proper operation. The Outside Air Temperature Sensor is a 0K Type III thermistor sensor. The sensor should be mounted in the upright position as shown, in an area that is protected from the elements and direct sunlight. Be sure to make the wiring splices inside of the Outside Air Temperature Sensor weathertight enclosure. See Figure 0 for detailed wiring. Caution: Be sure to mount the Outside Air Sensor in an area that is not exposed to direct sunlight. A shaded area under the eve of the building or under the HVAC unit rainhood is normally a good location. If sensor is not located as specified, erroneous outside air temperature readings 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! Outdoor Air Temperature Sensor Make Splice Connections Inside Sensor Enclosure As Shown. Seal All Conduit Fittings With Silicone Sealant. Mount Sensor Outdoors In Shaded Protected Area & In Upright Position As Shown INPUTS +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 Figure 0: Outside Air Temperature Sensor Wiring Remote Occupied Contact A Remote Occupied contact closure supplied from another Building Automation System device can be used to enable Occupied and Unoccupied modes on the MUA II controller. This relay contact must be a dry contact and be wired as shown below. See Figure below for detailed wiring. Remote Occupied Contact (Relay By Others) INPUTS +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 MUA II Controller Board Figure : Remote Occupied Contact Wiring 0 MUA II Controller

11 Outside Air Humidity Sensor If you want to install a humidity sensor onto the MUA II controller, it is important that you follow these instructions. There are 2 terminals labeled H+ and H-. Terminal H+ will connect to the connection labeled +VDC on the analog input block. See Figure 2. Terminal H- connects to the connection labeled AIN 5 on the analog input block. Also the resistor labeled PU5 needs to be removed. Lastly, a supplied 250 Ohm, /4 Watt, % resistor needs to be installed between AIN 5 and. See Figure 2 for detailed wiring. Warning: It is very important to be certain that all wiring is correct as shown in the wiring diagram below. Failure to observe the correct polarity will result in damage to the Humidity Sensor or controller. Outdoor Air Humidity Sensor mA H+(T) H-(T4) Seal All Conduit Fittings With Silicone Sealant. 250 Ohm Resistor (Shipped With Sensor) To be Installed Between AIN5 and INPUTS +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 MUA II Controller Board The Pull-up Resistor (PU5) Must Be Removed When Using A 4-20ma Device Figure 2: Humidity Sensor Wiring If You Are Using The Standard Factory Supplied Humidity Sensor, It Has Terminals Labeled H+ (T) And H- (T4). Terminal H+ (T) Is The Voltage Input And Should Be Connected To The Terminal Labeled +VDC On The VAV/CAV Controller. Terminal H- (T4) Is The 4-20 Ma Output Signal And Should Be Connected To The Terminal Labeled AIN 5 On The VAV/CAV Controller. A Factory Supplied 250 Ohm Resistor Should Be Connected Between AIN 5 And A Ground Terminal On The VAV/CAV Controller. If A Sensor Other Than The One Supplied By The Factory Is Used, Refer To The Wiring Instructions Shipped With The Sensor. Space Humidity Sensor A Space Humidity Sensor or a Fan Proof Of Flow Switch can be connected to AIN7 on the MUA II controller. Shown below is the Space Humidity Sensor wiring. If You Are Using The Standard Factory Supplied Humidity Sensor, It Has Terminals Labeled + (T) And - (T2). Terminal + (T) Is The Voltage Input And Should Be Connected To The Terminal Labeled +VDC On The MUA II Controller. Terminal - (T2) Is The 4-20 Ma Output Signal And Should Be Connected To The Terminal Labeled AIN7 On The MUA II Controller. A Factory Supplied 250 Ohm Resistor Should Be Connected Between AIN 7 And A Ground Terminal On The MUA II Controller. If A Sensor Other Than The One Supplied By The Factory Is Used, Refer To The Wiring Instructions Shipped With The Sensor. 250 Ohm Resistor (Shipped With Sensor) To be Installed Between AIN7 and + (T) - (T2) The Pull-up Resistor (PU7) Must Be Removed When Using A 4-20ma Device INPUTS +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 MUA II Controller Board Fan Proof Of Flow Switch If a Fan Proof Of Flow Switch is required then obviously the Space Humidity Sensor option is not available. By the same token if a Space Humidity Sensor is required then the Fan Proof Of Flow Switch option is not available. See Fan Proof Of Flow Switch wiring below. Fan Proof Of Flow Switch INPUTS +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 MUA II Controller Board Figure 3: Space Humidity Sensor Wiring VAV/CAV Controller Figure 4: Fan Proof Of Flow Switch Wiring

12 Start-up & Commissioning In order to have a trouble free start-up it is important to follow a few simple procedures. Before applying power for the first time it is very important to correctly address the controller and run through a few simple checks. Controller Addressing All MUA II controllers are equipped with address switches. If the MUA II controller is to operate as a stand alone system (not connected to any other controllers) the controller address switch should be set for address. When using the Modular Service Tool or System Manager to program and configure the MUA II controller you would enter this address to communicate with the controller. When the system is to be connected to other HVAC unit controllers on a communication loop, each controllers address switch must be set with a unique address between and 59. See Figure 5 for address switch setting information. For detailed information regarding communication wiring and connection for interconnected and networked systems, please see the Orion System Installation & Troubleshooting Guide. Power Wiring One of the most important checks to make before powering up the system for the first time, is to confirm proper voltage and transformer sizing for the controller. Each MUA II controller requires 0 VA of power delivered to it at 24 VAC. Each 2 slot expansion board requires 5 VA at 24 VAC and each 4 slot expansion board requires 0 VA at 24 VAC. You may use separate transformers for each device (preferred) or power several devices from a common transformer. If several devices are to be powered from a single transformer correct polarity must be followed. Warning: Observe Polarity! All boards must be wired with -to- and 24 VAC-to-24 VAC. 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. Check all wiring leads at the terminal block for tightness. Be sure that wire strands do not stick out and touch adjacent terminals. Confirm that all sensors required for your system are mounted in the appropriate location and wired into the correct terminals on the MUA II controller. Be sure any expansion boards connected to the MUA II controller are also correctly wired just as you did for the MUA II controller. After all the above wiring checks are complete, apply power to the MUA II controller and all expansion boards connected to it. This Switch Should Be In The OFF Position As Shown ADDRESS ADD ADDRESS ADD TOKEN NETWORK ADDRESS ADD Note: The Power To The Controller Must Be Removed And Reconnected After Changing The Address Switch Settings Controller Address Switch Address Switch Shown Is Address Switch Shown Is Set For Address Set For Address 3 The Address For Each Controller Must Be Unique To The Other Controllers On The Local Loop And Be Between and 59 Caution Disconnect All Communication Loop Wiring From The Controller Before Removing Power From The Controller. Reconnect Power And Then Reconnect Communication Loop Wiring. INPUTS TB3 +VDC AIN AIN2 AIN3 AIN4 AIN5 AOUT AOUT2 AIN7 PJ RN5 C0 C7 C2 D5 PU D6 PU2 D7 PU3 D8 PU4 D9 PU5 D PU7 D4 ADDRESS U3 CX3 SW 0-5 VDC 0- VDC U5 ADD TOKEN NETWORK JP X2 C4 C5 R5 R9 R22 C U0 U4 CX0 U2 CX4 CX2 D0 C7 D2 R3 SC R7 D9 L D3 R0 R R6 C9 U C3 C6 TB4 R26 C20 PJ2 PRESSURE SENSOR EXPANSION CX5 PJ3 R24 R25 D7 D8 C8 VR C9 VR2 D6 R27 V6 POWER 24VAC Figure 5: MUA II Controller Address Switch Setting 2 MUA II Controller

13 Initialization: Upon applying power to the MUA II controller the following should occur: On system powerup a 30 second start-up delay is performed where all default setpoints are initialized, LED s are initialized and all outputs are turned off. When power is first applied, LED2 is turned off for 5 seconds. At this time the LED will blink to indicate the setting of the address switch and then extinguish for another 5 seconds. The LED will now blink for a 30 second start-up delay to protect the fan and other components from short cycling during intermittent power conditions. If all inputs are operating correctly it will blink once every ten seconds. The PWR LED should glow continuously. If this is a stand alone or interconnected system, The COMM LED should also glow continuously after its initial start-up routine. If this is a networked system, The COMM LED should flicker approximately once every second to indicate communications are occurring. If the LEDs are behaving as indicated, proceed to the next step. If the LEDs fail to light or do not behave as indicated, please proceed to the troubleshooting section of this manual to diagnose and correct the problem before proceeding with the start-up process. Programming The Controller The next step is programming the controller for your specific requirements. 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 operators interfaces are available for programming of the MUA II controller. You may use either the Modular Service Tool or the Modular System Manager to access the status and setpoints of any controller on your communications loop. See the Modular Service Tool and System Manager Programming guide for MUA II controller programming. If you are going to use a personal computer and the Prism computer front end software, please see the Orion Prism Programming Manual. No matter which operators interface you use, it is recommended that you proceed with the programming and setup of the controller in the order that follows:.) Configure The Controller For Your Application 2.) Program The Controller Setpoints. 3.) Program The Controller Operation Schedules. 4.) Set The Controller Current Time And Date. 5.) Review Controller Status Screens To Verify System Operation And Correct Controller Configuration Mode Selection UP STATUS PREV NEXT SETPOINTS ESC DOWN CLEAR System Manager SCHEDULES OVERRIDES ALARMS ENTER PREV UP NEXT STATUS SETPOINTS SCHEDULES CONFIGURATION BALANCE - TEST ON 4 7 DEC MINUS 7 DEC MINUS ESC DOWN ENTER CLEAR OVERRIDES ALARMS Figure 6: Operators Interfaces VAV/CAV Controller 3

14 Sequence Of Operations MUA Operation Overview The MUA controller is designed to control an HVAC unit to provide fresh air of neutral temperature (and humidity if required) into a building that has a net air loss caused by air being exhausted from the building. The MUA controlled HVAC unit can have heating, cooling and/or dehumidification capabilities. Heating and cooling sequences are controlled based on outside air temperature. Whenever the outside air temperature is outside of the heating or cooling setpoints, the appropriate heating or cooling staging will be initiated to bring the supply air temperature within the required range and maintain it at that condition. The outside air humidity and temperature in the form of a dewpoint temperature setpoint control the MUA controller dehumidification sequence. Since dewpoint temperature by definition is the temperature at which water vapor condenses from the air mixture, it is good indicator of when dehumidification is required. The controller uses the outside air humidity sensor in conjunction with an outside air temperature sensor to calculate the dewpoint temperature of the outside air. If the outside air dewpoint exceeds the dewpoint setpoint with respect to the outside air temperature, 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 differently. These are divided into unoccupied mode and 5 occupied modes. The operation of each of these modes is explained on the following pages. Figure 8 illustrates the Temperature Protect Modes which are determined by the Supply Air Temperature. Outdoor Air Temperature (OAT) Cool Vent Heat Cool Setpoint Heat Setpoint Dewpoint Setpoint Dewpoint Temperature Figure 7: Operational Modes Cool Setpoint = Supply Setpoint + Cool Deadband Dehumidification Heat Setpoint = Supply Setpoint - Heat Deadband Unoccupied In this mode the controller will shut off the cooling, the heating and the blower. Low SAT Cutoff Limit High SAT Cutoff Limit Occupied In the occupied cycle the unit has the following modes: Cooling Vent Dehumidification Heating Temperature Protect Mode The diagrams that follow depict the operational modes of the MUA II controller. Figure 7 illustrates how the OAT (Outdoor Air Temperature) and the Dewpoint Temperature initiate the various normal operational modes. 0F (SAT) Supply Air Temperature 50 F Figure 8: Temperature Protect Mode Cool This mode occurs when the controller reads an OAT one Cooling Deadband above the Supply Air Setpoint and a Dewpoint Temperature below the Dewpoint Setpoint. The migration table for this mode is shown below. 4 MUA II Controller

15 Condition Outside Dewpoint rises above the Dewpoint Setpoint. OAT drops below the Cool Setpoint Mode Dehumidification Vent Dehumidification Mode This mode occurs when the controller reads a Dewpoint Temperature above the Dewpoint Setpoint. The migration table for this mode is shown below. During this mode the controller will maintain the SAT between a ± Cooling Deadband from the Supply Air Setpoint. This is achieved by activating and deactivating the stages of cooling. (SAT) Supply Air Temperature Staging Up Condition OAT falls below the Heat Setpoint and Dewpoint Temperature falls below the Dewpoint Setpoint OAT rises above the Cool Setpoint and Dewpoint Temperature falls below the Dewpoint Setpoint Dewpoint Temperature falls below the Dewpoint Setpoint Mode Heat Cool Vent Supply Setpoint Staging Down Figure 9: Cool Mode Staging Cool Deadband Cool Deadband Time In this mode the controller will use the Outside Enthalpy 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. Vent Mode This mode occurs when the controller reads an OAT between the Cooling and Heating Deadband from the Supply Air Setpoint, and a Dewpoint reading below the Dewpoint Setpoint. The migration table for this mode is shown below. Condition OAT falls below the Heat Setpoint OAT rises above the Cool Setpoint Dewpoint Temperature rises above the Dewpoint Setpoint Mode Heat Cool Dehumidification During this mode the controller will shut off heating and cooling, but will allow the blower to continue its normal operation..) Unit Hot Gas Reheat Two kinds of Hot Gas Reheat are available with the MUA II controller, ON/OFF Hot Gas Reheat control and Modulating Hot Gas Reheat Control. Modulating Hot Gas Reheat control requires that the HVAC unit is equipped with the MHGRV II controller. If the MHGRV II board is detected, the MUA II board will send the Supply Temperature Setpoint to the MHGRV II controller in order to modulate the Hot Gas Reheat Valve to maintain the desired Supply Air Temperature. If the HVAC unit does not have the MHGRV II controller installed and is instead using an ON/OFF Hot Gas Reheat Valve for reheat control, the user must configure a relay to activate the ON/OFF Hot Gas Reheat Valve. The relay will cycle the ON/OFF Hot Gas Reheat Valve to maintain the supply air temperature between the Cooling and Heating Setpoints. 2.) Dehumidification Heat: The user can elect to use the unit heating source to reheat the air during dehumidification or to supplement Hot Gas Reheat dehumidification control. If the HVAC unit is not equipped with Hot Gas Reheat or the Hot Gas Reheat is not able to bring the Supply Air Temperature to the desired setpoint, the MUA II controller will activate the heat source to maintain the Supply Air Temperature Setpoint. The heat source can be either internal or external to the HVAC unit. VAV/CAV Controller 5

16 Sequence Of Operations Heat This mode occurs when the controller reads an OAT one Heating DeadBand below the Supply Air Setpoint and a Dewpoint Temperature below the Dewpoint Setpoint. The migration table for this mode is shown below. Condition OAT rises above the Heat Setpoint Dewpoint Temperature rises above the Dewpoint Setpoint Mode Vent Mode Dehumidification Condition SAT rises above the High Cutoff Temperature SAT drops below the Low Cutoff Temperature After Temperature Protect is initiated and SAT rises 0 F above the Low Cutoff Temperature After Temperature Protect is initiated and SAT drops0 F below the High Cutoff Temperature Mode Heating & Cooling Disabled Blower Operation For 3 Minutes Then Off Return to Normal Operation (SAT) Supply Air Temperature Initialization Supply Setpoint Heat Deadband Heat Deadband Time On system powerup a 30 second start-up delay is performed where all default setpoints are initialized, LED s are initialized and all outputs are turned off. When power is first applied, LED2 is turned off for 5 seconds. At this time the LED will blink to indicate the setting of the address switch and then extinguish for another 5 seconds. The LED will now blink for a 30 second start-up delay to protect the fan and other components from short cycling during intermittent power conditions. MUA II Configuration & Setup Figure 9: Heat Mode Staging In this mode the unit will stage the Heating to deliver the Supply Air at the Supply Temperature Setpoint. If the MODGAS II is connected to the system, the MUA II board will send the Supply Temperature Setpoint to the MODGAS II in order to modulate to the desired Supply Temperature. The MODGAS II will work as the first stage of Heating. This allows having the MODGAS II working together with standard ON/OFF heat stages. If External Heat is configured, it will cancel the internal heat call. External Heating This feature is designed to control an external Hot Water Valve or an SCR controller. Configuring a relay for External Heating Control enables this feature. This relay is activated any time the unit needs heat. The output follows a proportional control scheme and can be configured for a range of 0-0 VDC or 2-0 VDC. The External Heat relay is deactivated when the call for heat or reheat is canceled or the Supply Air Temperature rises one Heating Deadband above the Supply Air Temperature Setpoint. Temperature Protect This mode occurs when the SAT rises above the High Cutoff Temperature Setpoint or drops below the Low Cutoff Temperature Setpoint for a defined period of time. To return to the normal mode, the SAT must drop 0 F below the High Cutoff Temperature Setpoint or rise 0 F above the Low Cutoff Temperature Setpoint, depending on the situation. See the table that follows. 6 There are a few configuration selections available to the user, which can be used to tailor the software operation to match the mechanical equipment this controller is installed on. Resets Supply Temperature Reset from Space Temperature This feature requires a Space Temperature Sensor connected to the controller. The reset is always upwards from the Supply Temp Setpoint to the Maximum Supply temp (Maximum Supply temp = Supply Temp Setpoint + Reset band). When the Space Temperature is at the Min Temp Reset the desired Supply temp is the Supply Temp Setpoint. When the Space Temperature is at the Max Temp Reset the desired Supply temp is the Maximum Supply temp. Outside Dewpoint Reset from Space Humidity This feature requires a Space Humidity Sensor connected to the controller on analog input AIN7. When this option is used the Fan Proof Of Flow Switch option is not available as it also connects to analog input AIN7. The reset is always downwards from the Outside Dewpoint Setpoint to the Minimum Outside Dewpoint (Minimum Outside Dewpoint = Outside Dewpoint Setpoint - Reset Band). When the Space Humidity is at the Space Hum Min Reset the desired Outside Dewpoint is the Minimum Outside Dewpoint. When the Space Humidity is at the Space Hum Max Reset the desired Outside Dewpoint is the Outside Dewpoint Setpoint. MUA II Controller

17 Sequence Of Operations Other Control Options Fan Proof Of Flow Switch The MUA II controller can monitor a Fan Proof of Flow Switch contact closure on analog input #7. When this option is used the Outside Dewpoint Reset from Space Humidity option is not available as it also connects to analog input #7. Anytime the fan is running this contact must be closed. If the contact does not close or remain closed no heating or cooling outputs can activate or remain active. If this option is selected, the loss of this signal can generate an alarm so that the user knows there is a problem that needs to be corrected. There is a built-in five second filter provided to prevent intermittent contact bounce from affecting the operation. This option is not available Remote Occupied Contact If you have a separate source that will provide a dry contact closure to indicate the occupied mode, you can monitor this contact closure in place of a humidity sensor on analog input #3. Outside Air Temperature Broadcast If you have several Air Handlers on a job-site and they are connected together via the RS-485 communications loop, you can select this option and configure the controller to broadcast Outside Air Temperature to all controllers on the network, instead of installing a Outside Air Temperature sensor on every unit. This saves the user from having to install duplicate sensors on every air handler. Outside Air Humidity Broadcast If you have several Air Handlers on a job-site and they are connected together via the RS-485 communications loop, you can select this option and configure the controller to broadcast Outside Air Humidity to all controllers on the network, instead of installing a Outside Air Humidity sensor on every unit. This saves the user from having to install duplicate sensors on every air handler. Relay Configuration Output Relay Configuration Relays #2 thru 2 can be configured for the type of function that matches the MUA II controller options. The relays can be configured for any of the following: Heating (aux. Heating) Stages, Cooling (compressor) Stages, Gas Reheat Control for De-Humidification and External Heat Enable for control of external heating devices. the feature of viewing the current time the MUA II Controller is using, you must install a Personal Computer and the PRISM computer front end software. Alarm Detection and Reporting The MUA II controller continuously performs self diagnostics during normal operations to determine if any operating failures have occurred. These failures can be reported to the user in several ways, depending on the type of system and options installed by the user. If a Modular Service Tool or System Manager is connected, the alarms will be reported on the Status Screens. If the Prism computer graphic front end is installed, the alarms will be reported on the main screen of the program and logged to disk. If neither remote communication option is installed, the user can check for alarms by viewing LED2 on the MUA II controller board. If everything is operating normally, the LED will blink once every 0 seconds. If there is a problem detected, the LED will flash a specific number of times every 0 seconds to indicate what the problem is. These flashes or blink codes are described below in order of priority. The highest priority condition must be corrected before any lower conditions can be observed and corrected. One blink is the lowest priority and indicates no alarms. Five blinks is the highest priority. If the RemoteLink (modem) is installed, any alarm condition can initiate a callout to a pager to alert someone to the alarm condition. See the Prism computer front end program operations manual for further information on this topic. LED Blinks This Number Of Times Blink Code Description Normal Operations. No Alarm Conditions 2 Sensor Failure (OAT, OAH and SAT) 3 Mechanical Failure 4 Fan Proving Alarm 5 Unit In Force Mode Scheduling The MUA II controller has an internal battery backed up Real Time Clock (RTC) that allows the controller to keep the time and allows for scheduling. The MUA II controller has an internal 7 day schedule with 2 start-stop events per day. You can also have holiday schedule with 2 start-stop events. This holiday schedule can be used for 4 different holiday periods. One thing to be noted is that you cannot view the current time when you are viewing the MUA II 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 on the current time, re-enter the time and date and it will change the controller to match what you have entered. If you want Table 2: Diagnostic Blink Codes Force Modes or Overrides The MUA II Controller relay outputs can be user overridden if the Modular Service Tool or the PRISM graphical front-end program is available. The modes of operation for the relays are: 0 = Auto (Normal Operation) = Forced ON 2 = Forced OFF The analog outputs are forced if the user specifies a value between 0.0 and 0.0 VDC. To cancel the force mode, enter a value less than zero (-.0 VDC). VAV/CAV Controller 7

18 Sequence Of Operations When the analog outputs are forced, the display on the Modular Service Tool or front-end can be interpreted as the actual voltage. During normal operation, the display indicates the percentage signal applied based on the user defined voltage limits. For example, if the user defines a 2.0 VDC to 0.0 VDC range, then 50% would be 6.0 VDC instead of the 5.0 VDC applied when the range is 0.0 VDC to 0.0 VDC. As mentioned, force modes can only be activated with an attached remote communications device described previously. Furthermore, the override condition can only remain in effect as long as the remote device is connected and communicating with the unit. That means that you cannot set an override condition and then walk away from the equipment with the override still active. The loss of communications or the removal of the remote interface will automatically terminate the override within 0 minutes. This is to protect the equipment and to prevent an override condition from remaining active indefinitely resulting in inefficient operation of the equipment. Caution: No equipment protection is available during the force mode of operation. That means you could start a compressor without running the fan or create other conditions that WILL damage the HVAC equipment. WattMaster Controls, Inc. assumes no responsibility or liability for the misuse of these user overrides that cause damage to the HVAC equipment! Internal Trend Logging The MUA II Controller continuously maintains an Internal Trend Log, which records a fixed set of values at an interval programmed by the user. These values can be retrieved only with the PRISM graphical Troubleshooting Using LED s To Verify Operation The MUA II controller is equipped with LEDs that can be used as very powerful troubleshooting tools. Their are four LEDs on the MUA II controller board. Three of these LEDs are used in troubleshooting. See Figure 8 for the LED locations. The LEDs and their uses are as follows: COMM This LED will light up to indicate system communications. PWR This LED will light up to indicate that 24 VAC power has been applied to the controller. LED This LED is not 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 front-end program. If you don t have the Remote Communications option with a front-end program, you do not have access to these logs. There are 20 log positions available. Once the last ( 20th ) position has been recorded, the log jumps back to the first position and begins overwriting the old data. This means the user is required to retrieve the logs at an interval that is shorter than the duration of the last 20 logs. Shown below are some log intervals and the duration of 20 logs. Minute Interval = 2 Hour Duration 5 Minute Interval = 30 Hour Duration 30 Minute Interval = 60 Hour Duration 60 Minute Interval = 20 Hour Duration The fixed items in the log are listed below: Date Time Supply Air Temperature Outside Air Temperature Supply Air Setpoint Outdoor Air Humidity Dewpoint Setpoint Onboard Relay Status ( BIT Pattern ) Expansion Board Relay Status ( BIT Pattern ) External Heat (% Of Max Heat ) These items and values are explained in greater detail in the PRISM manual. 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 correct polarity. The 24 VAC power must be connected so that all ground wires remain common. If after making all these checks the PWR LED does not light up, please contact WattMaster technical support for assistance. COMM LED Operations When power is applied to the controller The COMM LED will also light up. If this is a Stand Alone System (one controller only on the loop) or an Interconnected System (several MUA II controllers tied together without a CommLink) the COMM LED will glow continuously. The COMM LED will flicker when you are connected to the MUA II controller and you are entering setpoints with the Modular Service Tool or the System Manager. It will also flicker if this is a Networked System. If this is a Networked System (the system has a CommLink installed) the COMM LED should flicker rapidly indicating that the system is communicating. A flicker is defined as a brief moment when the LED turns off then back on. It may be easier to see this flicker if you cup your hand around the LED. 8 MUA II Controller