Daikin MicroTech II Operation And Maintenance Manual Download Page 2

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Summary of Contents for MicroTech II

Page 1: ...el AVV Floor Mounted Model AHV Ceiling Mounted IMPORTANT Before unit commissioning please read this publication in its entirety Develop a thorough understanding before starting the commissioning proce...

Page 2: ......

Page 3: ...tional Integral PI Control Loops 29 Discharge Air Temperature Control 29 PI Control Parameters 30 Proportional Band 30 Integral Time 31 Indoor Air Fan Operation 31 Auto Mode 31 Occupied Standby and By...

Page 4: ...network variables for each protocol refer to Protocol Data Packet bulletin ED 15065 Copies of the latest version of these manuals are available for download on our web site at www DaikinApplied com o...

Page 5: ...quency energy and if not installed and used in accordance with this instruction manual may cause interference to radio communications It has been tested and found to comply with the limits for a Class...

Page 6: ...Ventilation DCV DX Cooling Discharge Air Low Limit DXLL Defrost Start Set Point DSSP Defrost Reset Set Point DRSP Defrost Time Limit DTL Defrost Time Temperature Curve Value DTTC Economizer Compare Di...

Page 7: ...d Heating Setpoint OHS Occupancy Override Input OOI Occupancy Sensor Input OSI Proportional Integral PI Parts Per Million PPM Positive Temperature Coefficient PTC Relative Humidity RH Space Humidity S...

Page 8: ...ay Format The keypad display s 2 digit 7 segment display normally shows the effective heating or cooling temperature set point Effective Set Point Output The display also is used to view and modify UV...

Page 9: ...e heating set point appears in the display All other LEDs are switched off The UVC archives each change to the keypad display FAN and MODE keys When the ON STOP key is used to bring the unit out of OF...

Page 10: ...ery first time this cleared value shows as the highest allowed value 5 F 3 C but is not an actual offset value When using the 3 F 1 7 C remote wall sensor any set point offset adjustment made at the k...

Page 11: ...ncy Override Input Set occupancy 0 occupied 1 unoccupied 2 bypass 3 standby Adjusting this variable is intended only for troubleshooting Once you are done cycle unit power to clear this variable and r...

Page 12: ...e6 Economizer IA OA Enthalpy Differential EED Adjust economizer IA OA enthalpy differential RW x 1 3 Btu lb 3 kJ kg 1 Space Humidity Output ERH Display room humidity optional 00 No sensor connected RO...

Page 13: ...roup two or more related states into a single control function There are three super states Heating Cooling and Emergency Heat The states which are indicated by a specific state number are where all t...

Page 14: ...HEAT Mode State 4 LOW LIMIT Mode State 15 Manual Forced Transition One way Automatic Transition Two way Automatic Transition UVC Unit Modes The UVC provides several normal modes of unit operation Thes...

Page 15: ...gle UVC state OFF 9 When OFF mode becomes active the UVC stops all normal heating cooling and ven tilation OA damper is closed and fan operation ends The UVC continues to monitor space conditions indi...

Page 16: ...page 36 is set to ON If the UVC is not set to another mode within 1 hour fixed the UVC automatically switches to the Fan Only mode see Fan Only Mode State 10 below While in Purge mode the UVC does not...

Page 17: ...Yes Yes No No Full Heat State State 7 The Full Heat 7 state is the normal state that the UVC goes into when Emergency Heat mode is active It is activated when the space temperature is lower than the E...

Page 18: ...he Heat mode super state becomes active the UVC automatically determines which of the Heat Mode states to make active based upon the transitions for each state Figure 11 Heat mode super state diagram...

Page 19: ...override the OA damper position see Outdoor Air Damper Operation on page 32 and adjust the OA damper toward closed as necessary to maintain the current DATS see Discharge Air Temperature Control on p...

Page 20: ...ing economizer is available and adequate to meet the cooling requirements When the Econ state becomes active the UVC will within State continually calculate the DATS Discharge Air Temperature Control...

Page 21: ...tilation optional on page 33 and the OA damper is adjusted as needed to maintain the CO2 set point Low Limit State State 15 The Low Limit state is a non normal state during Cool mode The Low Limit sta...

Page 22: ...h ServiceTools for MicroTech II Applied Terminal Unit Controllers ATS Purge Mode When in Purge mode the UVC uses the IAF OAD and exhaust output as needed to purge the space The UVC stops all normal he...

Page 23: ...the normal UVC mode priority Table 11 Energy hold off Energy hold off Off Off Energized5 Ignored Energy hold off Off Off Pressurize Ignored Ignored Ignored Off Pressurize De pressurize Ignored Ignore...

Page 24: ...s closed Unoccupied Bypass Standby Ignored Ignored Standby Null default 3 Occupied Ignored Occupied Unoccupied Ignored Unoccupied4 Null default Contacts open Occupied Occupied Contacts closed Unoccupi...

Page 25: ...to 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 net...

Page 26: ...ed Set Point Shift Capability The Set Point Shift Input variable is used to shift the effective heat cool set points It typically is bound to a networked supervisory controller or system that provides...

Page 27: ...ctive Set Point Output network variable is set equal to the calculated set point The Effective Set Point Output is the temperature set point that the UVC maintains which normally appears on the keypad...

Page 28: ...Space Temp Setpoint 71 0 F from remote sensor Setpoint Offset 1 0 F from LUI Setpoint Shift not used 0 0 F OCS 75 0 F OHS 70 0 F Effective set point calculations Absolute Offset Setpoint OCS OHS 2 71...

Page 29: ...mperature Setpoint Output Discharge Air Temperature Operate Electric Heat PI 6 CO2 optional Single Effective CO2 Setpoint Space CO2 Position the OA Damper PI 7 Low Limit Single Calculated Discharge Ai...

Page 30: ...tanding of how these parameters affect system operation Generally these parameters do not need to be adjusted from the factory default settings Figure 19 Optimized PI loop control Proportional Band Th...

Page 31: ...ation based on the unit mode the occupan cy mode and the values of several network variables Auto Mode The UVC is provided with a user selectable auto fan mode feature When in auto fan mode the UVC us...

Page 32: ...onomizer function is used by the UVC to determine if the OA is adequate for economizer primary cooling When both the economizer and mechanical cooling are available the economizer is used as primary c...

Page 33: ...le Reliable Ignored Unreliable Test B Reliable Reliable Ignored Reliable Test C Expanded Reliable Reliable Ignored Reliable Test C and Either Test B or Test A Leading Edge Reliable Reliable Reliable R...

Page 34: ...ce odor buildup due to the out gassing of new construction material and then return the minimum OA damper position at a later date If the CO2 Demand Controlled Ventilation DCV option is used the UVC o...

Page 35: ...de the functions described below Figure 22 Binary inputs Binary Inputs 3 sets of dry contacts to signal UVC Input 1 Unoccupied default Input 2 Remote shutdown Input 3 Ventilation lockout default or Ex...

Page 36: ...e Output 1 Relay output for light signal Output 2 Fault signal Output 3 Exhaust fan operation These outputs are relay type outputs that are intended to be used with signal level volt ages 24 VAC maxim...

Page 37: ...igh BO 2 Inside Fan Medium BO 3 Electric Heat 1 BO 4 Electric Heat 2 BO 5 Electric Heat 3 BO 6 External Output Option 2 Fault Indication1 BO 7 BO 8 BO 9 BI 1 BI 2 BI 3 BI 4 External Input Option 3 Ven...

Page 38: ...hat a fault condition exists The fault signal binary output energizes The fault performs the appropriate control actions as described for each fault Manual reset faults can be reset in one of three wa...

Page 39: ...is forced closed Electric heat stages are de energized Fault is indicated Space Humidity Sensor Failure optional fa The Space Humidity Sensor Failure fault occurs when the UVC detects open or short c...

Page 40: ...a suspect sensor 1 Disconnect both sensor leads from the UVC 2 Using some other calibrated temperature sensing device take a temperature reading at the sensor location 3 Use the temperature reading fr...

Page 41: ...e expected voltage replace the sensor Table 23 Humidity versus voltage RH VDC mV RH VDC mV 10 1330 55 2480 15 1475 60 2600 20 1610 65 2730 25 1740 70 2860 30 1870 75 2980 35 1995 80 3115 40 2120 85 32...

Page 42: ...wn 1 emergency heat available during shutdown 0 h3 Wall Sensor Type 0 3 F 1 55 F to 85 F 0 r5 Slave Type Configuration 0 independent slave 1 dependent slave 0 sl OAD Min Position High Speed Setpoint O...

Page 43: ...uring ventilation or economizer cooling 54 F 12 C d2 Discharge Air High Limit DAHL 125 F 51 7 C Space Fan Off Delay 4 min Fan Cycling Configuration space fan operation during occupied standby and bypa...

Page 44: ...dard terms and conditions of sale including Limited Product Warranty Consult your local Daikin Applied representative for warranty details Refer to Form 933 430285Y To find your local Daikin Applied r...

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