1. Manuals
  2. Brands
  3. Data Aire Manuals
  4. Control Systems
  5. dap4 touch
  6. User manual

Data Aire dap4 User Manual

Hide thumbs Also See for dap4:
Table of Contents

Advertisement

Quick Links

dap4
User Manual
Data Aire, Inc.
230 W. BlueRidge Avenue
Orange, CA 92865
www.dataaire.com
1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the dap4 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Data Aire dap4

Summary of Contents for Data Aire dap4

  • Page 1 User Manual Data Aire, Inc. 230 W. BlueRidge Avenue Orange, CA 92865 www.dataaire.com...
  • Page 2 These settings are not necessarily the best for your specific application. Data Aire, Inc. reserves the right to make design changes for the purpose of continuous product improvement or to withdraw any design without notice.

  • Page 3: Table Of Contents

    Table of Contents (If viewing as a pdf, press Ctrl and click section you want to access). Introduction ........................4 Optional Equipment & Features ..................5 Getting Started ........................6 Turning the Unit On ......................12 Status Loop.......................... 7 Menus ..........................14 MENU A - ON / OFF ......................

  • Page 4: Introduction

    Introduction The dap4 continues the tradition of advanced electronic devices from Data Aire for monitoring and control of computer room air conditioning units which began in 1977. Each generation has provided more accurate monitoring and application flexibility. Control - The dap4 offers the definite answer for precision environmental control.

  • Page 5: Optional Equipment & Features

    Rack Sensor Module: Allows up to 32 rack temperature sensors to be connected to the dap4 to control fan speed. Sensors can be set to work independently or arranged in groups. The rack temperature calculation can be set to use the highest of the sensors or an average of the sensors.

  • Page 6: Getting Started

    Getting Started The dap4 consists of two main components: the controller and the display panel. The controller is located inside the electrical panel. The display panel is mounted on the front door of the cabinet and/or mounted in a remote location. They are connected by a special telephone type cable.

  • Page 7: Status Loop

    Color Touch Display There are several touch sensitive areas on home screen of the display. Listed below is how each area works when it is touched. Access service menus shown later in this manual (requires holding 1 sec.) Displays the next screen.
  • Page 8 Compressor On - A number will also appear next to the icon to indicate multiple compressors are running. If variable type, speed modulation is also shown. Humidifier On - If variable type, humidity demand modulation is also shown. Dehumidification Mode Running. Heaters On - A number will also appear next to the icon to indicate multiple heaters are on.
  • Page 9 Status Loop (continued): The next screen in the status loop is the Optional screen, which displays the status of optional inputs of the unit. (Note: this screen does not appear if no optional inputs are used). The next screen in the status loop is the Rack Temperature Status screen, which displays the status of all optional rack sensor.
  • Page 10 Status Loop (continued): The next screen in the status loop is the Zone Status screen, which displays the status of the zone. (Note: this screen only appears on the Master control when the Zone Master feature is enabled). The next screen the Zone Units screen, which displays the status of each units in the zone.
  • Page 11 Status Loop (continued): The next screen in the status loop is the Power Meter Status screen. (Note: this screen only appears when an optional power meter is installed). The next screen in the status loop is the Variable Compressor Status screen. Note: this screen only appears when a variable compressor is installed).
  • Page 12 Status Loop (continued): The next screen in the status loop is the Trending screen. It displays the historical trends of the return air temperature and humidity. Additional trends of discharge air temperature and chilled water temperature will also appear if installed. To display the legend information, touch the information icon located at the top right corner.

  • Page 13: Turning The Unit On

    Turning the Unit On Turn the disconnect switch to the ON position. The controller will boot up and conduct a self-test. After approximately 20 seconds the display will become active. NOTE: Unless otherwise specified, the unit is shipped with the unit to start-up in the OFF mode.

  • Page 14: Menus

    Menus Press the middle key on left side to access the Main Menu. The first screen will ask for a numerical password which determines the three levels of menus that will be displayed: User, Service and Factory. Note: The User level password is always 0000. The Service level password by default is 0001 and may be changed by the installer.

  • Page 15: Menu A - On / Off

    Important Notice – Service and Factory level passwords should only be given to qualified technicians. Under normal circumstances the Factory menus should not be changed. Please consult with Data Aire engineering or service personnel for help using these menus. Change the Service level and Factory level passwords following these steps: 1.

  • Page 16: Menu B - Setpoints

    MENU B – SETPOINTS       Temp Setpoint: This set point is used to control the return or discharge air temperature (whichever is chosen for control mode in the factory settings menu). The range of adjustment depends the temperature being controlled: Return air: range is 65 to 85°F with a default value of 72.0°F.
  • Page 17 MENU B – SETPOINTS continued       Note: This screen is only shown when the airside economizer feature is enabled in the factory settings menu. Heating Sp: This set point is used to control heating of the return air temperature.
  • Page 18 MENU B – SETPOINTS continued     Note: This screen is only shown when the fan is set to modulate to rack temperature in factory settings menu. Temp Setpoint: This fan temperature set point is used to control the fan speed based on the Rack Air Temperature.
  • Page 19 MENU B – SETPOINTS continued    Hum Setpoint: This set point is used to control the return air humidity. The range of adjustment is 25 to 70% with a default value of 50%. Hum Deadband: This is the amount humidity must rise above the set point before dehumidification mode will start.
  • Page 20 MENU B – SETPOINTS continued      Note: This screen is only shown when a Chiller Water Valve is configured as “Engy Svg Cool” or “Aux Chill Wtr” in the factory settings menu. Setpoint: The Energy Saver Setpoint determines the highest temperature that the chilled water can be used for the energy saver mode.
  • Page 21 MENU B – SETPOINTS continued Total Flow: This is the total air flow of all units currently running in the zone. Max Flow: This is the calculated maximum air flow that is capable for the zone. Zone AF Demand: This is the calculated value based on how much of the total airflow makes up the max flow.

  • Page 22: Menu C - Clock/Scheduler

    MENU C – CLOCK/SCHEDULER       Day: The day of the week is for display only and is based on the date setting. Date: Setting for the current date (in Month/Day/Year format). Time: Setting for the current time (in 24 hour format). ...
  • Page 23 MENU C – Clock/Scheduler continued Note: The following screens will only appear if Set-Back Enable is “Yes”.       Cooling Setpoint: Temperature set point for cooling, used when the scheduler is in set-back mode. The range of adjustment depends the temperature being controlled: Return air: range is 65 to 85°F with a default value of 77°F.
  • Page 24 MENU C – Clock/Scheduler continued         Day: The day of the week that you want to set in the scheduler. The range of adjustment is Monday to Sunday with a default value of Monday. Copy to: The weekday that you want the settings of this day to be copied to.
  • Page 25 MENU C – Clock/Scheduler continued          Note: The Special Day scheduler will override the Weekday scheduler on the date that the Special Day scheduler is active. Setting: This is the action that should occur at the selected start date. This action will remain in effect until the next start date that is set to have an action.
  • Page 26 MENU C – Clock/Scheduler continued       Note: The Holiday scheduler will override the Special Day and Weekday schedulers for the dates that the Holiday scheduler is active. Date Start: The selection of the date (month/day format) that an action will take place.

  • Page 27: Menu D - Input/Output

    MENU D – INPUT/OUTPUT          The Input / Output menu indicates the current status of all inputs and outputs. This menu is helpful for trouble shooting purposes. Screens that will appear in this menu include: Digital Inputs - The status of the 18 inputs (only 8 inputs on minidap4) are indicated on one screen.

  • Page 28: Menu E - Historical Data

    MENU E – HISTORICAL DATA       The historical data menu contains information such as alarm logs and device run hours. The first screen in the menu is the Alarm Log which may contain up to 200 of the most recent alarms.
  • Page 29 MENU E – Historical Data continued          There are up to three screens that indicate accumulated run hours for any device that can be installed. Devices that are not installed will remain at zero run hours. The run hours of each device can be independently reset by choosing “Yes”...

  • Page 30: Menu F - Information

    MENU F – INFORMATION        The information menu offers specific information about the controller that is important while trouble-shooting. The menu contains up to five screens as described below. Information 1: Lists the Manufacturer, Software Version, Software Date, Controller ID, Bios version and date, Boot version and date.

  • Page 31: Menu G - Network Config

    BMS PORT 1 Protocol: This setting is for the type of communication card that is installed in the slot of the dap4 marked “BMS card.” Range of selection is N/A (card not installed- default), iDAP, LON, BACnet TCP/IP, BACnet MSTP and MODBUS (RTU).

  • Page 32: Menu H - Calibrate Sensors

    MENU H - CALIBRATE SENSORS ( Service Level)        This menu is used to allow analog sensors to be calibrated by a service technician using a calibrated instrument. Each screen in this menu identifies the function of the sensor and the terminal that the sensor is connected to.

  • Page 33: Menu I - Manual Control

    Auto” timer for that output is started. When the timer expires, the output will return to automatic mode value which is determined by the dap4 logic. Note: The controller does not have to be turned on in order to use the manual control mode.

  • Page 34: Menu J - Factory Settings

    (Factory Level) Caution: This menu requires the Factory Level password and entry should be limited to qualified service personnel only. Consult with Data Aire before using this menu as incorrect settings may lead to equipment malfunctions. The Factory level is automatically cleared when no key is pressed within 5 minutes.
  • Page 35 MENU J – FACTORY SETTINGS (factory level) continued        Note: The Fan Settings screen is only displayed when fan type is set to “Plug Fan” in the previous screen. CW Mode: The fan control method while in CW cooling. The selections are: Constant Speed: (default selection) Fan runs at a constant speed.
  • Page 36 DX Speed: The DX constant speed has a range of adjustment from 60 to 100% with a default setting of 85%. *Warning: When using BMS fan modes: Data Aire will not be responsible for malfunctions or space control conditions caused by a BMS failure or an...
  • Page 37 MENU J – FACTORY SETTINGS (factory level) continued       Note: The Fan Range Settings screen is only displayed when either CW or DX fan control is set to a mode that modulates the fan. Modulate Min: This sets the lowest amount that the fan speed can be modulated. Range of adjustment is 40 to 100% with a default setting of 40%.
  • Page 38 CW or DX fan mode is set to modulate to maintain Air Pressure. The dap4 uses a proportional integral algorithm (P+I) to maintain air pressure. The description of the settings offered below is only a guide. The difference between the set point and the actual measured air pressure is called the error.
  • Page 39 MENU J – FACTORY SETTINGS (factory level) continued        Note: The Fan Air Flow screen is only displayed when CW or DX fan mode is set to modulate to maintain Air Flow. Number of Fans: The total number of fans on this unit. Range of adjustment is from one to four fans, with a default of three fans.
  • Page 40 Note: The Fan Air Flow screen is only displayed when CW or DX fan mode is set to modulate to maintain Air Flow. The dap4 uses a proportional integral derivative algorithm (PID) to maintain air flow. The description of the settings offered below is only a guide. The difference between the set point and the actual measured air flow is called the error.
  • Page 41 Note: The Fan Delta Tuning PID screen is only displayed on IRDX models when fan mode is set to modulate to maintain Delta Temp. The dap4 uses a selectable stepped method or proportional, integral and derivative algorithm (P, P+I or PID) to maintain the delta temperature to the delta temperature set point (Shown in the set points menu).
  • Page 42 MENU J – FACTORY SETTINGS (factory level) continued        Note: This Compressor Settings screen is not shown on the IRDX model, which is explained on the next screen. Type: The available compressor selections include: None - Selection for chilled water cooling only.
  • Page 43 MENU J – FACTORY SETTINGS (factory level) continued       Note: This Compressor Settings screen is only shown on the IRDX model. Type: The available compressor selections include: None - Selection for chilled water cooling only. On/Off Comp - One fixed speed compressor.
  • Page 44 MENU J – FACTORY SETTINGS (factory level) continued        Note: The Variable Compressor screen is only displayed when the compressor selection is set for a variable compressor. The variable compressor will modulate to maintain the mode selected in the previous screen.
  • Page 45 MENU J – FACTORY SETTINGS (factory level) continued Minimum Speed: This setting determines the lowest speed that the variable compressor can run. Range of adjustment is 900 to 1500RPM with a default of 1500RPM. Maximum Speed: This setting determines the highest speed that the variable compressor can run.
  • Page 46 MENU J – FACTORY SETTINGS (factory level) continued        Note: The Variable Compressor screen is only displayed when the compressor selection is set for a variable compressor. Enable Pump-Down: The pump-down feature prevents refrigerant from migrating back to the compressor.
  • Page 47 MENU J – FACTORY SETTINGS (factory level) continued      Note: This compressor rotation screen is only displayed when more than one compressor is selected. However, it is not shown when a variable compressor is selected because the variable compressor is always the lead compressor. Rotation Enabled –...
  • Page 48 MENU J – FACTORY SETTINGS (factory level) continued       Reheat – The type of reheat used. Choices are: None - No reheat installed. One - A single stage of reheat. 1-Elect - A single stage of reheat but used only in dehumidification mode. HW Valve - (Not shown on IRDX Model).
  • Page 49 MENU J – FACTORY SETTINGS (factory level) continued        Wtr Vlv: The selection of the water valve function. Choices are: None – No water valve used. (This is the default selection) Chill Wtr Cool – Uses chilled water to perform all cooling, without DX. The return air is used for temperature control.
  • Page 50 MENU J – FACTORY SETTINGS (factory level) continued        Note: The CW Disch Air PID screen is only displayed when the water valve is set to Chilled Water Regulation. Control: Selection of the algorithm used: Stepped, Proportional (P), Proportional and Integral (P+I) and Proportional Integral Derivative (PID).
  • Page 51 MENU J – FACTORY SETTINGS (factory level) continued Min Modulation: In some applications with very low load, the valve may modulate to a closed position, yet the load will cause a rise quicker than the valve can open. This unstable condition can be improved by setting this minimum modulation slightly below the heat load.
  • Page 52 MENU J – FACTORY SETTINGS (factory level) continued      Dehum Mode: The type and method of dehumidification selections are: None – No dehumidification mode (default setting) 1C In Limit – One compressor may run as long as temperature does not drop 2°F below the set point minus the dead band.
  • Page 53 MENU J – FACTORY SETTINGS (factory level) continued       Note: The Economizer Settings screen is only displayed when the economizer feature is enabled. SP Mode: Modulation of damper position can be set to maintain Differential Enthalpy (default) or Fixed Dry Bulb.
  • Page 54 MENU J – FACTORY SETTINGS (factory level) continued          Temp Sensors Used: Select how many rack sensors are installed. If 1 or more sensors are installed, the rack mode is enabled and the settings below will appear. Range of selection is 0 (default) to 32.
  • Page 55 MENU J – FACTORY SETTINGS (factory level) continued                        Note: The Rack Settings screens are only displayed when the rack mode is enabled.
  • Page 56 Note: Use of this feature will remove the Zone Master and/or Airside Economizer password keys from this controller. Please consult Data Aire service department for the procedure to use this feature.

  • Page 57: Menu K - Alarms & Limits

    MENU K – ALARMS & LIMITS (Service Level)       Audio Mode: The selection for how the buzzer should sound. Selections are: None: Buzzer will have no sound (default setting). Short Beep: Buzzer will beep with an interval of 1 second on and 2 seconds off as long as there is an active alarm.
  • Page 58 MENU K – ALARMS & LIMITS (Service Level) continued         Comp Short Cycle: When set to “Yes” (default) the short cycle alarm is enabled and will occur when a short cycle condition is detected. Notice: A short cycle condition will occur regardless of whether the short cycle alarm is enabled of not.
  • Page 59 MENU K – ALARMS & LIMITS (Service Level) continued         No Water Flow Action: This is the setting of what should happen in the event that no water flow is detected (flow sensor required). The water flow alarm cannot be disabled and is checked only when there is a cooling demand and the CW valve has opened at least 60%.
  • Page 60 MENU K – ALARMS & LIMITS (Service Level) continued        Firestat Setpoint: This is the maximum temperature of the return air temperature for the firestat alarm to occur and it cannot be disabled. A firestat alarm will cause the unit to turn off until the alarm is no longer active.
  • Page 61 MENU K – ALARMS & LIMITS (Service Level) continued The individual rack sensors are configured in the Factory menu where the alarm may be enabled (Monitor+Alarm and Control+Alarm) or disabled (Monitor Only and Control Only). Hi Temp Alarm: When the temperature of any rack sensor rises above the alarm set point, a high rack temperature alarm will occur.
  • Page 62 MENU K – ALARMS & LIMITS (Service Level) continued       Hi Humidity Alarm: When set to “Yes” (default) the alarm is enabled. When the return air relative humidity rises above the set point, a high humidity alarm will occur.
  • Page 63 MENU K – ALARMS & LIMITS (Service Level) continued     Envelope Protect: When set to “Yes” (default) the compressor envelope protection alarm is enabled. The envelope logic will change the compressor’s speed to bring it into the normal operating zone. However, if compressor continues to run outside the envelope, the compressor will be locked out and require a manual reset.
  • Page 64 MENU K – ALARMS & LIMITS (Service Level) continued     This Phase Loss Alarm screen is only shown when the optional power meter is installed and configured in the factory menu. Action: The action to a phase loss alarm setting has three choices: No Alarm: (Default setting).
  • Page 65 MENU K – ALARMS & LIMITS (Service Level) - Custom Inputs        Each of the custom alarm inputs can be given a unique message that will appear on its alarm screen and appear on the configuration screen of the input. Some messages also carry out a function as noted below.
  • Page 66 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs                              ...
  • Page 67 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs                              ...
  • Page 68 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs                              ...
  • Page 69 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs                             ...
  • Page 70 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs                              ...

  • Page 71: Menu L - Configure I/O

    MENU L – CONFIGURE I/O (Factory Level) Notice: The I/O Configuration menu should only be used by qualified technicians. It allows changes to the way inputs and outputs operate. Improper setting may prohibit safety functions from working and also affect the operation of controller. ...

  • Page 72: Menu M - Set Zone Master

    MENU M – SET ZONE MASTER Notice: The Zone Master menu only appears on the Master controller (Unit at address 1) when the zone master feature is enabled.         Zone ID: Within the same area, there may be more than one zone. This setting is sent out to all units to identify which zone the unit belongs to.
  • Page 73 MENU M – Set Zone Master (continued) Avg Rack - The Zone Master will modulate the fan speed of all running units in the zone to the average rack temperature. This selection requires optional rack temperature sensors. C Air Prs - The Zone Master will modulate the fan speed of all running units in the zone to maintain static air pressure.
  • Page 74 MENU M – Set Zone Master (continued)                       Temperature Assist – If set to “Yes”, the Master will be allowed to request additional standby units to come on when the average zone temperature is higher than the cooling set point plus dead band plus 1.5°F.
  • Page 75 MENU M – Set Zone Master (continued)       Rotation: To even out runtime among standby units, a scheduled rotation of the lead unit may be chosen. The available selections are: None – (Default) Rotation is disabled and the lead unit will not change. The lead unit selection will appear instead of the rotation timing selections below.
  • Page 76 MENU M – Set Zone Master (continued)          Each unit in the zone must be assigned a mode of Standby (Stdby/Stdby1) or Off as described below. Note: More units may be displayed than are in the zone, their setting makes no difference.
  • Page 77 MENU M – Set Zone Master (continued)        This screen will only appear when the secondary schedule is used. Current Cfg: shows which schedule is currently running. (Primary or Secondary). Override Active: (only shown when secondary schedule is running) Allows you to override the secondary schedule to run the primary schedule.
  • Page 78 MENU M – Set Zone Master (continued)         The holiday schedule allows you to set a span of one or more days to run the schedule selected: Primary or Secondary. Up to 4 holiday schedules may be set.
  • Page 79 MENU M – Set Zone Master (continued) Date – Choose the day and month of the special day. Setting – Choose which schedule will run during the special day. When the clock reaches the selected special day (at 12:00 midnight) the schedule that is selected for this day will run.

  • Page 80: Operation Of Fan

    Operation of Fan When the system is turned on, the fan(s) will start running and must run for a full minute before any temperature or humidity control functions will begin. Note on minidap4: The fan can be set to “Automatic” mode. This allows to fan to turn off until there is a need for temperature or humidity control.

  • Page 81: Operation Of Chilled Water Cooling

    Operation of Chilled Water Cooling The CW valve can be controlled by the Return or Discharge air temperature. On energy saver units, after the “Switch to DX” setting (setting in the Factory menu) of continuous chilled water cooling, the unit will switch to DX cooling for one hour to exercise the compressors.

  • Page 82: Operation Of Dx Cooling

    The following types of safeties are used to protect the compressors. Pressure Safeties: For safety reasons, the High / Low pressure alarm functions are not performed by the dap4 controller. The compressor is shut down externally and the dap4 will indicate and log the alarm. General Safeties:...
  • Page 83 Please Note: Compressor operation is based on the type of compressor(s) that are configured and the temperature being controlled. Please refer to the proper section for the type of compressors and control mode that you are using. Standard On/Off compressors: When temperature is increasing: Stage 1 ON at Setpoint + Deadband Stage 2 ON at Setpoint + Deadband + Stage-to-Stage...
  • Page 84 Single Variable Speed Compressor Controlling Return Air Temp. The variable compressor turns on when the return air temperature rises above the Setpoint + Deadband. It turns off when temperature drops below the Setpoint minus the C1 Ofs setting (default of 1.0°F). Note if the Energy Saver mode is running: The variable compressor turns on when the return air temperature rises above the Setpoint + Deadband + Stage to Stage setting + 1.0°F.
  • Page 85 Variable + Fixed Speed Compressors – Controlling Return Air Temp. The variable compressor (C1) turns on when the return temperature rises above the Setpoint + Deadband. As temperature continues to rise, the variable compressor will run faster. Once it is running at 95% of maximum speed for the “C2 On Delay”...
  • Page 86 Variable + Fixed Speed Compressors – Controlling Discharge Air Temp. The variable compressor (C1) turns on when the discharge air temperature rises above the Setpoint + Deadband. As temperature continues to rise, the variable compressor will run faster. Once it is running at 95% of maximum speed for the “C2 On Delay”...

  • Page 87: Operation Of Reheat

    Operation of Reheat The dap4 can be configured to use the following reheat modes: None - No reheat installed. DX dehumidification cannot operate. One - A single stage of reheat. 1-Elect - A single stage of reheat but runs only in dehumidification mode.
  • Page 88 Operation of Reheat – Continued Staging Heating Elements: When temperature is dropping: Stage 1 ON at Setpoint minus Deadband Stage 2 ON at Setpoint minus Deadband minus Stage-to-Stage Stage 3 ON at Setpoint minus Deadband minus 2 X Stage-to-Stage Note: there is a minimum delay of 60 seconds before next stage turns on. When temperature is rising: Stage 3 OFF at Setpoint minus 2 X Stage-to-Stage Stage 2 OFF at Setpoint minus Stage-to-Stage...

  • Page 89: Operation Of Dehumidification

    Operation of Dehumidification Humidity Anticipation: When this feature is enabled (set in the factory menu), the Humidity set point is offset +1% for every 1.5° that the return air temperature is from the set point to a maximum 10° offset. Fan Speed Assist: When this function is enabled in the factory menu, the fan speed will be reduced (by 5 to 20%) during the dehumidification mode (CW or DX units).
  • Page 90 Dehumidification Operation (continued) Dehumidification DX Unit: Operation is based on the mode selected in the factory menu. None – No dehumidification mode (default setting) 1C In Limit – One compressor may run as long as temperature does not drop 2°F below the set point minus the dead band. Dehumidification will resume when the temperature rises back to the set point.
  • Page 91 Dehumidification Operation (continued) On/Off Compressors Controlling Dew Point: In Dew Point control mode, compressors are staged according to dew point, but the relative humidity level is also factored as well. When dew point or humidity is increasing: Stage 1 ON at High DP Setpoint or if R.Humidity is above Setpoint + Deadband Stage 2 ON at High DP Setpoint minus 0.2°F or if R.Humidity is above Setpoint + Deadband + 1%...
  • Page 92 Dehumidification Operation (continued) Variable Compressor Controlling Relative Humidity Temp Control set to Return Air: The variable compressor starts at Humidity Setpoint plus Deadband. The compressor demand will increase 10% for each 0.1% increase in humidity and reach 100% at Humidity Setpoint + Deadband + 1%.

  • Page 93: Operation Of Humidifier

    Operation of Humidifier There are two types of humidifiers: Modulated and Non-Modulated (On/Off type). Each type can control Relative Humidity (default) or Dew Point. The humidifier operation depends on these settings. Please refer to the section that applies to your equipment: Non Modulating, Controlling Relative Humidity: Humidification mode starts when humidity drops below the Humidity Setpoint minus the Humidity Deadband.
  • Page 94 Auto-Flush: This feature is enabled in the factory menu. It sets how many hours can elapse before the humidifier pan drain is opened for 4 minutes. Desaturation cycle: When this feature is enabled (in the factory menu) it will periodically interrupt the humidification mode (every 5 to 30 mins) so that the air has time (1 to 5 mins) to fully absorb the humidity.

  • Page 95: Operation Of Zone Master

    Zone Master is an optional feature that offers a dap4 control teamwork solution. Up to sixteen dap4 units may be arranged in the Zone Master network. Each unit in a zone is given a unique sequential network address. The unit at address 1 is designated as the master and has menus with selectable features of: •...
  • Page 96 Also, all units in a zone must have the same software version. If units were installed at different times, they may not have the same software version. Please check the dap4 software version by using menu F- “Information”. If needed, please contact the Data Aire service department to obtain a software update for USB installation.
  • Page 97 customized to use the average or highest temperature of its sensors. The master can be set to take the average or highest temperature of the units in the zone. Additional rack sensor information is available on a publication dedicated to this optional feature.
  • Page 98 Zone Master Operation (continued) Unit Settings - Standby mode (default) or Prior mode allows the master to request the unit to run due to one of these four causes: To satisfy the minimum “Number Units On” setting. Based on this setting and the current lead unit, the master may request the unit to be on.
  • Page 99 Zone Master Operation (continued) Exercise U2 – (Only shown when two units are installed). This setting is used for applications when unit 2 is a “backup unit” and unit 1 is normally doing all of the cooling. This function sets how long the rotation to unit 2 will last before going back to unit 1.

  • Page 100: Alarms And Troubleshooting

    Alarms During an alarm condition, the status LED bar of the display will light up in red. The red box on the main screen will indicate what alarm(s) is occurring. This table offers assistance troubleshooting what may be causing the alarm. Each alarm is logged in the History menu.
  • Page 101 Alarm Screen Description & Possible Causes Corrective Actions Classification *Warning • • Smoke Smoke The smoke detector Check the smoke detector and Detector detector is sensing smoke reset after smoke has cleared sensing smoke • • and will shut Bad smoke detector Check for 24 volt power at down unit Smoke Detector and replace if...
  • Page 102 Alarm Screen Description & Possible Causes Corrective Actions Classification • *Warning Reset timer Maintenance timer has not been reset • • C1 or C2 Low Circuit Not enough air flow Blower motor on low speed or Pressure pressure is though evaporator coil failed motor, High static under 50 PSI pressure, or undersized plenums...
  • Page 103 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Excessive Airflow High indoor temperature, check across the evaporator blower speed, and check coil equipment selection • Check return duct for leakage and check temperature entering • evaporator coil Heavy Load •...
  • Page 104 Alarm Screen Description & Possible Causes Corrective Actions Classification • • No electric reheat Check reheat elements for proper operation • Lack of vapor barrier • Seal room with the proper vapor • barrier Unusual high rate of building heat gain •...
  • Page 105 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Incorrect settings on Replace tank if necessary the controller • Go to Menu L- Configure I/O and change the Humidifier Fault Switch action setting • • Discharge Air Discharge air Supply air temperature Adjust the Discharge Air alarm Low Temp...
  • Page 106 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Return Air Return Air Return air temperature Check return air temperature. High Temp Temperature is is above set point Adjust Return Air Hi alarm set above the point (range 70º-90º) alarm set point •...
  • Page 107 Alarm Screen Description & Possible Causes Corrective Actions Classification • Go to Menu L- Configure I/O and change the Air Flow Switch action setting • • Water Flow No Water Flow No water flow Check pump • • **Urgent Wiring problem Check electrical wiring •...
  • Page 108 Alarm Screen Description & Possible Causes Corrective Actions Classification • inhibits humidification Check zone master settings and if any unit has recently temperature/humidity set points been dehumidifying of all units • • Dirty Filter Dirty filter Dirty filter (detected by Change Filter switch is tan mounted pressure...
  • Page 109 Loose wiring or • Go to Menu L- Configure I/O and *Warning damage wiring from change the Humidifier Fault humidifier controller to Switch action setting dap4 • Incorrect settings on the controller • • C1 or C2 Compressor is Compressor tripped its...
  • Page 110 Alarm Screen Description & Possible Causes Corrective Actions Classification • • *Warning Faulty sensor Check sensor and replace sensor • • External Temp. The optional Temperature is below Check temperature of sensor Module Sensor Rack sensor rack sensor low alarm and set point for alarm T** Low has a High...
  • Page 111 Alarm Screen Description & Possible Causes Corrective Actions Classification • (gPOD units Check CO2 setpoint only) • • Incorrect settings Check CO2 Sensor **Urgent • • Faulty Sensor Calibrate sensor • Out of calibration • • Low CO2 CO2 level is Co2 level is lower than Check Co2 Level higher than...

  • Page 112: Connections And Manual Override Board

    Manual Override Switches For testing, during start-up and in the event of emergency, each Data Aire gForce unit is provided with manual override slide switches. There are seven slide switches, one for each of the following functions: Water Valve Fan Speed...
  • Page 114 Dap4 Connections Control & Alarms – Digital Outputs I/O Board Pin ID ID Connector number Unit TB System Blower J12-2 TB1-4 Compressor 1 J12-3 TB1-5 Compressor 2 J12-4 TB1-6 Cooling 3rd Stage J13-2 TB2-37 Cooling 4th Stage J13-3 TB2-38 Humidifier...
  • Page 115 Control – Analog Output I/O Board Pin ID ID Connector number Unit TB J4-3 TB2-34 Water Valve Control J4-2 TB2-35 J4-4 TB2-51 Humidifier Modulating Control J4-2 TB2-52 J4-5 TB4-1, 2 Blower Fan Speed Control J4-2 TB4-3, 4 J4-6 SCR Reheat J4-2...

  • Page 116: Glossary

    Digital inputs are normally wired to switches, which are either open (off) or closed (on). Minidap4: A smaller version of the regular dap4 controller. It has the same processing power, but is limited in I/O.
  • Page 117 Telephone: 714-921-6000 or 800-347-2473 E-mail: Service@dataaire.com Engineering@dataaire.com Sales@dataaire.com Fax: 714-921-6010 Main 714-921-6011 Engineering 714-921-6022 Parts Sales Web Site: www.dataaire.com Job/Unit Information: Data Aire Job Number: ___________________________________________ Serial Number: _________________________________________________ Model Number: _________________________________________________ Date Installed: _____ / _____ / 20_____ Installing Contractor: _____________________________________________...
  • Page 118 ISO 9001-2015 Certified A member of the CS Group of Companies Copyright 2019 Data Aire, Inc. dap4 User Manual 10/2019...

Table of Contents

Save PDF