Daikin MicroTech II Operation And Maintenance Manual
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Daikin MicroTech II Operation And Maintenance Manual

Used with daikin classroom unit ventilator model avv - floor-mounted, model ahv - ceiling-mounted
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See also: Installation and Maintenance Manual
Operation and Maintenance Manual
MicroTech
®
Ventilators
Electric Heat Only
Software Model UV06
Used with Daikin Classroom Unit Ventilator
Model AVV - Floor-Mounted
Model AHV - Ceiling-Mounted
Before unit commissioning, please read this publication in its entirety. Develop a thorough understanding before starting the
commissioning procedure.
This manual is to be used by the commissioner as a guide. Each installation is unique, only general topics are covered. The order in
which topics are covered may not be those required for the actual commissioning.
II Controls for Daikin Classroom Unit
IMPORTANT
People and ideas you can trust.
OM 752-4
Group: Unit Ventilator
Document PN: 106506347
Date: July 2014
™

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  • Page 1 Operation and Maintenance Manual OM 752-4 Group: Unit Ventilator Document PN: 106506347 Date: July 2014 MicroTech II Controls for Daikin Classroom Unit ® Ventilators Electric Heat Only Software Model UV06 Used with Daikin Classroom Unit Ventilator Model AVV - Floor-Mounted...

  • Page 3: Table Of Contents

    ontents Introduction ................4 Integral Time ..............31 Acronyms/Abbreviations ..........6 Indoor Air Fan Operation ..........31 Getting Started ..............8 Auto Mode ..............31 Using the Keypad/Display ..........8 Occupied, Standby, and Bypass Operation ....31 Display Format ..............8 Unoccupied Operation ...........31 Keypad Functions ............8 Cycle Fan................31 Using the Keypad/Display ..........10 Off Delay .................31 Changing Set Points ............10...
  • Page 4 II control system used in the Dai- ® kin Applied Unit Ventilator product line. It describes the MicroTech II components, input/ output configurations, field wiring options and requirements, and service procedures. For installation and general information on the MicroTech II Unit Ventilator Controller, refer to IM 747, MicroTech II Unit Ventilator Controller.

  • Page 5: Introduction

    Electric shock hazard. Can cause per onal injury or equipment damage. This equipment must be prop- erly grounded. Connections and service to the MicroTech II control panel must be performed only b personnel that are knowledgeable in the operation of the equipment being controlled.

  • Page 6: Acronyms/Abbreviations

    ntroduCtIon Acronyms/Abbreviations The following table list acronyms and abbreviations that may or may not be used within this manual. Other abbreviations for keypad displays and parameters can be found in Table 8 on page and Table 25 on page 42. Table 5: Acronyms and abbreviations Description Acronym/Abr.
  • Page 7 ntroduCtIon Description Acronym/Abr. National Electric Code Outside Air Outdoor Air Coil Temperature OACT Outside Air Dampers Energize Exhaust Fan OAD Setpoint OADE OAD Min Position High-Speed Setpoint x OADE OAD Min Position Low-Speed Setpoint OADL OAD Min Position Med-Speed Setpoint OADM Outdoor Air Damper Position OADP...

  • Page 8: Getting Started

    The MicroTech II Unit Vent Controller (UVC) is a self-contained device that is capable of complete, stand-alone operation. Information in the controller can be displayed and modified by using the keypad/display (local user interface). The following sections de- scribe how to use the keypad/display.
  • Page 9 ettInG tarted Table 6: Keypad/display security levels Level Display What is restricted? Password Default level (access all) Does not allow set point offset changes; also locks out keypad/dis- play menu access. Does not allow set point offset changes nor MODE key changes; also locks out keypad/display menu access Does not allow set point offset changes nor MODE and FAN key changes;...

  • Page 10: Using The Keypad/Display

    The keypad/display menu is accessed via an unmarked, hidden key. This hidden key is located approximately behind the letter “h” in the MicroTech II logo on the keypad/ display face. The keypad/display menu consists of two levels. The first level is the keypad/display Menu Item List containing alphanumeric characters representing each parameter.
  • Page 11 ettInG tarted Figure 5: Changing a keypad/display menu item Table 7: Keypad/display menu item list Keypad menu Display Abr. Description Default RW 1 item list Reset Alarm Input Enter 1 to clear alarms (clears all inactive alarms, except filter alarm). To enable the alarm again, enter 0. UVC (Heat/Cool) UVCM Display current UVC mode.
  • Page 12 ettInG tarted Keypad menu Display Abr. Description Default RW 1 item list Exhaust Interlock OAD Adjust OA damper position above which the exhaust fan output will be energized. There is a fixed –5% EOAD Min Position set point differential associated with this set point. Energize Exhaust Fan OADE Adjust OA damper minimum position when the exhaust interlock input is energized.

  • Page 13: State Programming

    State Programming The MicroTech II UVC takes advantage of “state” machine programming to define and control unit ventilator operation. A “State” defines a specific mode of operation for each process within the unit ventilator (e.g., heating, cooling, etc.) and contains the specific decision logic and sequence of operation for each mode.

  • Page 14: Uvc Unit Modes

    esCrIptIon of peratIon Figure 6: Complete UVC—state diagram FAN ONLY Mode Mode EMERGENCY HEAT (State 9) (State 10) Mode FULL HEAT Mode (State 7) NIGHT PURGE LUI Input Mode Network Input (State 8) CANT HEAT Mode (State 13) AUTO Mode COOL Mode HEAT Mode CANT COOL...

  • Page 15: Off Mode (State 9)

    esCrIptIon of peratIon Table 8: UVC state names and numbers State numbers Normal UVC modes State names Decimal ASCII Night purge Night Purge Fan only Fan Only Full Heat Emergency heat Cant Heat Heat Heat Cant Heat Low Limit Auto Econ DA Heat Cool...

  • Page 16: Night Purge Mode (State 8)

    Night Purge mode consists of a single UVC state: Night Purge [8]. Night Purge is a full ventilation with exhaust mode, during which room comfort is likely to be compromised. Therefore, Daikin strongly recommends using Night Purge only when the space is unoccupied.

  • Page 17: Emergency Heat Mode (Super State)

    esCrIptIon of peratIon Emergency Heat Mode (Super State) The Emergency Heat mode is provided for situations where the UVC is in a mode that does not normally allow heating, such as OFF, Cool, Night Purge, or Fan Only. If Emergency Heat mode is enabled, the UVC can automatically force itself into the Emergency Heat mode from OFF, Cool, Night Purge, Fan Only, Purge, Pressurize, De- pressurize, and Shutdown.

  • Page 18: Auto Mode

    esCrIptIon of peratIon Auto Mode Auto mode is provided so that the UVC can be set to automatically determine if heating or cooling is required. Auto mode is the default power-up UVC mode. Auto mode is made up of the Heat and Cool mode “super states”. When the UVC is set to auto mode, the UVC automatically determines which mode (Heat, Cool, or Active Dehum) to use.

  • Page 19: Cool Mode (Super State)

    esCrIptIon of peratIon 33), and the OA damper will be adjusted as needed to maintain the CO 2 setpoint. The UVC will remain in this state until one of the transition out conditions become true, or until one of the super state transition out conditions becomes true. Note: The OAD is considered to be in “alarm”...
  • Page 20 esCrIptIon of peratIon Figure 13: Cool mode super state diagram Enter from: LUI Input Network Input Auto Mode ECON COOL Economizer Mode Mode available? (State 3) DAT < VCLL CANT COOL Mode (State 12) DA HEAT LOW LIMIT HeatCap=100% Mode Mode DAT <...
  • Page 21 esCrIptIon of peratIon Figure 14: Econ state operation (occupied mode and auto fan) Discharge Air (DA) Heat State (State 4) The DA Heat state is a “normal” state during Cool mode. The DA Heat state typically is active when reheat is required to maintain DATS during the Econ mode, while maintain- ing required minimum OA damper position.

  • Page 22: Special Purpose Unit Modes

    The UVC stops all normal heating and cooling but does allow emergency heat if required. The de-pressurize mode can only be accessed via a network connection or with ServiceTools for MicroTech II Applied Terminal Unit Controllers (ATS).

  • Page 23: Unit Mode Priority

    esCrIptIon of peratIon Unit Mode Priority The UVC uses the network variables and binary inputs listed in Table 10 and Table 11 to determine the current unit mode. Special purpose UVC unit modes have higher prior- ity than the normal UVC unit modes as shown in the tables. Each table lists the highest priority items on the left to the lower priority items to the right.

  • Page 24: Occupancy Modes

    For example, if the network uses the Occupancy Override Input to force the unit into unoccupied mode, then the tenant override switch does not operate as expected. Therefore, Daikin strongly recommends using the Occupancy Sensor Input to control occupancy modes over a network and only using the Occupancy Override Input if there is reason to ensure tenant override does not occur.

  • Page 25: Additional Occupancy Features

    Occupancy Override Input to force the unit into unoccupied mode, then the unit-mounted tenant override switch does not operate as expected. Therefore, Daikin strongly recommends using the Occupancy Sensor Input to control occupancy modes over a network and only using the Occupancy Override Input if there is reason to ensure tenant override does not occur.

  • Page 26: Space Temperature Set Points

    esCrIptIon of peratIon Space Temperature Set Points The UVC uses the six occupancy-based temperature set points as the basis to deter- mine the Effective Set point Output. The effective set point is calculated based on the unit mode, the occupancy mode, and the values of several network variables. The ef- fective set point then is used as the temperature set point that the UVC maintains.

  • Page 27: Remote Wall-Mounted Sensor With 55°F To 85°F Adjustment (Optional)

    esCrIptIon of peratIon Remote Wall-Mounted Sensor with 55°F to 85°F Adjustment (optional) When the optional remote wall-mounted sensor with 55°F to 85°F adjustment dial is used, the UVC will effectively write the value of the set point dial to the Space Temp Set Point Input variable.
  • Page 28 esCrIptIon of peratIon Table 15: Set point calculation examples Example A – Stand-Alone Unit, No remote sensor, No network communication Given Occupancy Mode = Occupied and Unit Mode = Heat Space Temp Setpoint = (not used) Setpoint Offset = (from LUI) = 0.0°F Setpoint Shift = (not used) = 0.0°F OHS = 69.8°F Effective set point calculations...

  • Page 29: Proportional Integral (Pi) Control Loops

    Proportional Integral (PI) Control Loops The MicroTech II UVC uses PI-loop control for heating, cooling and ventilation processes within the unit ventilator. Numerous PI algorithms can be used depending upon the unit ventilator configuration. The UVC uses “single” and “cascading” PI loops where needed.

  • Page 30: Pi Control Parameters

    esCrIptIon of peratIon PI Control Parameters Associated with each PI loop is a set of two adjustable parameters: Proportional Band and Integral Time. When the unit ventilator is properly sized for the space, the factory settings for these parameters provides the best and most robust control action (see Figure 19).

  • Page 31: Integral Time

    IA fan to cycle with calls for heating and cooling during the occupied, standby, and bypass occupancy modes. When the fan is off, the OA damper is closed. Daikin recom- mends using this feature only when it is acceptable that normal ventilation is not required.

  • Page 32: Outdoor Air Damper Operation

    esCrIptIon of peratIon Outdoor Air Damper Operation The UVC is configured for an OA damper operated by a floating-point actuator. The OA damper actuator contains a spring that ensures the OA damper is closed upon loss of power. The floating-point actuator is driven by the UVC using two binary (Triac) out- puts.

  • Page 33: Networked Space Humidity Sensor Capability

    esCrIptIon of peratIon Temperature Comparison with Enthalpy Comparison Economizer (optional) If the optional Leading Edge economizer function is selected, the unit ventilator is provided from the factory with both the IA humidity and OA humidity sensors, which are used along with the IA temperature and OA temperature sensors to calculate IA enthalpy and OA enthalpy.

  • Page 34: Networked Space Co 2 Sensor Capability

    esCrIptIon of peratIon The UVC can optionally be factory configured to provide CO 2 -based Demand Con- trolled Ventilation (DCV). The CO 2 DCV function is useful in saving the energy typically wasted in treating OA not actually needed for ventilation within a space during occu- pancy levels below maximum design.

  • Page 35: Floating-Point Actuator Auto-Zero, Overdrive And Sync

    Multiple units can be connected to a single set of dry contacts. For wiring examples, see MicroTech II Unit Ventilator Controller IM 747. Note: Not all of the functions listed can be used at the same time. The UVC is provided with configuration parameters that can be adjusted to select which function is used for these inputs where multiple functions are indicated below.

  • Page 36: External Binary Outputs

    Output 3: Exhaust fan operation These outputs are relay type outputs that are intended to be used with signal level volt- ages (24 VAC maximum) only. For wiring examples, see MicroTech II Unit Ventilator Controller IM 747. Note: Not all of the functions listed can be used at the same time. The UVC is provided with configuration parameters that can be adjusted to select which function will be used for these outputs when multiple functions are indicated below.

  • Page 37: Uvc Input And Output Table

    uVC I nput and utput able Exhaust Fan ON/OFF Signal This relay output provides one set of Normally Open dry contacts that can be used to signal the operation of an exhaust fan. When the OA damper opens more than the En- ergize Exhaust Fan OA Damper set point, then the relay output signals the exhaust fan ON (contacts closed).

  • Page 38: Diagnostics And Service

    IaGnostICs and erVICe The most important aspect of troubleshooting unit ventilator controls is to isolate the source of the problem into one of two categories: 1. The problem resides within the UVC. 2. The problem is external to the UVC. Under most circumstances the problem is external to the UVC.

  • Page 39: Space Temp Sensor Failure (F0)

    IaGnostICs and erVICe Space Temp Sensor Failure (f0) The Space Temp Sensor Failure fault occurs when the UVC detects open or short con- ditions from the sensor. Effect: • Space fan de-energizes (unless in emergency heat mode). • Outside air damper is forced closed. •...

  • Page 40: Eprom Memory Indicator (Ee)

    IaGnostICs and erVICe EPROM Memory Indicator (ee) The EPROM Memory Indicator occurs when an unusual electrical event has scrambled the EPROM memory within the controller board. In the event that this happens, the controller board must be replaced. Configuration Display (--) The Configuration Display occurs when the display file “**.cfg”...

  • Page 41: Troubleshooting Humidity Sensors

    IaGnostICs and erVICe Troubleshooting Humidity Sensors The UVC is configured to use a 0–100% RH, 0–5 VDC, capacitive humidity sensor. Each sensor is calibrated according to the table shown. CAUTION The humidity sensor is not protected against reversed polarity. Check carefully when connecting the device or damage can result.

  • Page 42: Uvc Configuration Parameters

    IaGnostICs and erVICe Table 24: CO 2 versus voltage table CO 2 (PPM) VDC (V) CO 2 (PPM) VDC (V) 1200 1300 1400 1500 1600 1700 1800 1000 1900 UVC Configuration Parameters The UVC is been provided with a number of configuration variables as listed in the following table. These configuration variables are stored in UVC non-volatile memory.
  • Page 43 IaGnostICs and erVICe Configuration Parameter Name Abr. Notes Default Menu item Economizer IA/OA Enthalpy Differential EED 1 .3 btu/lb (3 kJ/kg) External BI-3 Configuration 0 = Ventilation Lockout, 1 = Exhaust Interlock Filter Alarm Enable 0 = disable, 1 = enable Filter Change Hours Setpoint fan run hours between filter change alarms 700 hrs...
  • Page 44 Daikin Applied Training and Development Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on Training, or call 540-248-9646 and ask for the Training Department.

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