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 Status Loop.......................... 7 MENU A – ON / OFF ......................16 MENU B –...
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
1.4” of DIN rail space. Zone Control: A feature that offers multiple dap4 controls a teamwork solution. Up to sixteen dap4 units may be arranged in the Zone Control network. Unit 1 has menus with selectable features of: •...
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 Unit 1 when the Zone Control 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 Airside Economizer Status screen. Note: this screen only appears when the Airside Economizer is enabled is installed. Sensor readings are displayed based on the Mode setting of the airside economizer.
Page 13 Alarm Log Screen: (Accesses by touching the Alarm icon on the main status screen). The time and date of past alarms along with readings at the time of the alarm can be viewed. Touch the Up or Down icon to see past alarm logs. There will be a short delay as each log is loaded.
Page 14 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 15 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 also 0000 and may be changed by the installer.
Page 16: 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 17: Menu B - Setpoints
MENU B – SETPOINTS Setpoint Temp Setpoint: 72.0• Temp Deadband: 2.0• Heat Deadband: 2.0• Stage-To-Stage: 0.3• Sync Zone TSP: 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 is 45 to 105°F with a default value of 72.0°F.
Page 18 MENU B – SETPOINTS continued Economizer Setpoints Hi Entalpy: 28.0BTU Enthalpy DB: 0.5BTU Min OA Temp SP: 32.0 • Max OA Temp SP: 78.0 • OAT Deadband: 1.0• Note: This screen is only shown when the airside economizer feature is enabled in the factory settings menu.
Page 19 MENU B – SETPOINTS continued Rack Temp Setpoints Temp Setpoint: 72.0 • Temp Deadband: 2.0• 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 20 MENU B – SETPOINTS continued dehumidification will begin. The range of adjustment is 50.0 to 65.0 °F with a default value of 59.0 °F. High Dewpoint Db: This is the High Dewpoint Deadband. It is the amount that the dewpoint must drop below setpoint before dehumidification ends. The range of adjustment is 1.0 to 3.0 °F with a default value of 1.0 °F.
Page 21 MENU B – SETPOINTS continued Humidity Setpoints Hum Setpoint: Hum Deadband: 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 22 MENU B – SETPOINTS continued Energy Saver Setpoint: 55.0 • Dead Band: • 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 cooling.
Page 23 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 24: Menu C - Clock/Scheduler
MENU C – CLOCK/SCHEDULER Clock Settings Day: Monday Date: 09/02/1 Time: 12:04 Sync Zone Clock: 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 25 MENU C – Clock/Scheduler continued Set-Back Settings Cooling Setpoint: 77.0• Heating Setpoint: 67.0• Humidify Offset: Dehumidify Offset: 45% Note on gPOD models: In addition to the clock/time schedular, Night Time setpoints are also used when an optional light sensor detects an absence of light (input is turned on).
Page 26 MENU C – Clock/Scheduler continued Week Day Scheduler Day: Monday Copy to: Monday Setting 1: 05:15 Normal SP 2: 15:00 Set-Back 3: 18:00 Turn Off 4: --:-- ----- 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.
Page 27 MENU C – Clock/Scheduler continued Special Day Scheduler Date Setting SD1: 01/02 Normal SP SD2: 07/04 Turn Off SD3: 07/05 Normal SP SD4: --/-- -------- SD5: --/-- -------- Note: The Special Day scheduler will override the Weekday scheduler on the date that the Special Day scheduler is active.
Page 28 MENU C – Clock/Scheduler continued Holiday Scheduler Date Date Start Stop Setting 01/02 12/24 Normal SP 12/24 01/02 Turn Off --/-- --/-- -------- 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 29: Menu D - Input/Output
MENU D – INPUT/OUTPUT Digital Outputs = Output Energized 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 30: Menu E - Historical Data
MENU E – HISTORICAL DATA 16:07:00 11/14/1 -> Scroll Up/Dn? #001 Smoke Detector Humidity: Return Air: 72.7 • 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 31 MENU E – Historical Data continued Run Hours 1 Reset v Blower: 16010 No Comp 1: 4010 Comp 2: Comp 3: Comp 4: 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 32: Menu F - Information
MENU F – INFORMATION Information Mfg: Data Aire Inc. SW Version: 2.15 SW Date: 10/18/2 Controller ID: 1955 Bios: 6.42 09/15/1 Boot: 4.10 01/03/1 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.
Page 33 MENU F – INFORMATION differently from what is written in this manual.
Page 34: Menu G - Network Configuration (Service Level)
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), MODBUS (RTU), BACnet MSTP, BACnet TCP/IP (or Modbus IP), LON and iDAP.
Page 35 Controller Address pLAN Address: Notice: Do not change this setting without following Zone Master instructions! This screen is only used for Zone Control setup. pLAN Address: Sets the pLAN address for the controller in a Zone Control network and has no influence on the supervisory BMS network. Immediately after setting this address, the terminal configuration of the controller will also change.
Page 36: Menu H - Calibrate Sensors (Service Level)
MENU H - CALIBRATE SENSORS ( Service Level) Analog Input Humidity Sensor Input U01 Offset: 00.0 Value: 45.8 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 37 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 38: Menu J - Factory Settings (Factory Level)
(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 39 MENU J – FACTORY SETTINGS (factory level) continued Settings CW Mode: Const Speed CW Speeed: Aire Seal Damper: DX Mode: Const Speed Dx Speed: Note: The Fan Settings screen is only displayed when fan type is set to “Plug Fan” in the previous screen.
Page 40 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 41 MENU J – FACTORY SETTINGS (factory level) continued Fan Range Settings Modulate Min: Modulate Max: 100% Aire SealSpeed: 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. The modulation is scaled to cover the full range between the minimum and maximum limits.
Page 42 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 43 MENU J – FACTORY SETTINGS (factory level) continued Fan Air Flow Number of Fans: Three Fan K-Factor: Minimum Flow: 1000cfm Maximum Flow: 32000cfm Setpoint: 30000cfm BMS SP: 29000cfm Note: The Fan Air Flow screen is only displayed when CW or DX fan mode is set to modulate to maintain Air Flow.
Page 44 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 45 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 46 MENU J – FACTORY SETTINGS (factory level) continued Compressor Settings Type: Sngl Variable Cooling Mode: Normal DX Delay: Initialize Delay Time: Min Run Time: 3min Min Off Time: 2min Delay Btw Stages: 60s Note: This Compressor Settings screen is not shown on the IRDX model, which is explained on the next screen.
Page 47 MENU J – FACTORY SETTINGS (factory level) continued Delay Btw Stages: Is the minimum time it will take to stage the next compressor on. Selection is 30 to 300 seconds with a default setting of 60 seconds. Compressor Settings Type: Variable Mode: Ret T-Constant Run Speed: 3600rpm...
Page 48 MENU J – FACTORY SETTINGS (factory level) continued Variable Compressor Band: 18.0 • Integration Time: 400s Derivative: C1 Offset: 2.0• C1 Off Delay: Minimum Speed: 1500RPM Maximum Speed: 6000RPM Note: The Variable Compressor screen is only displayed when the compressor selection is set for a variable compressor.
Page 49 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 50 MENU J – FACTORY SETTINGS (factory level) continued Exercise Disabled (feature not used – default setting) When changed to Exercise Time: When C1 has been running and C2 been idle, the fixed speed compressor will be run for the exercise time setting. Range of adjustment is 12hrs to 999hrs with a default of 100hrs.
Page 51 MENU J – FACTORY SETTINGS (factory level) continued Compressor Settings Rotation: Enabled Lead: Compressor 1 Rotate Lead: 168Hrs 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.
Page 52 Two - (Not shown on IRDX Model or MiniDAP). Two stages of heat. Three - (Not shown on IRDX Model or MiniDAP). Three stages of heat (default on large dap4). 3-Elect - (Not shown on IRDX Model or MiniDAP). Three stages of reheat used only in dehumidification mode.
Page 53 MENU J – FACTORY SETTINGS (factory level) continued HGRH Settings Band: 10.0 • Int. Time: 300s Derivative: Current Demand: Note: This screen is only displayed when reheat is a HGRH mode. HG Band: (Only displayed in HGRH modes.) This setting determines the sensitivity of the HGRH algorithm.
Page 54 MENU J – FACTORY SETTINGS (factory level) continued Water Valve Settings Wtr Vlv: Engy Svg Cool Wtr Vlv Voltage: 0-10 E/S Assist: 1 Comp E/S Start-up Time: 0s E/S Lockout Time: 5m E/S Changeover: 2.0• Switch to DX 0hrs Wtr Vlv: The selection of the water valve function. Choices are: None –...
Page 55 MENU J – FACTORY SETTINGS (factory level) continued compressors regardless of the air temperature.
Page 56 DX -> CW Delay: 5min Note: The dap4 can also operate with an On / Off CW valve. The settings on this screen only apply to the 0-10v modulated CW valve. Band: This setting determines the sensitivity of the algorithm. The smaller the band, the more the algorithm will try to correct the error.
Page 57 MENU J – FACTORY SETTINGS (factory level) continued DX Assist Delay: This setting delays the compressors from starting after the CW valve is fully open. The CW valve must remain fully open for the length of this delay. Once the compressor(s) have started, the CW valve will be forced 100% open.
Page 58 MENU J – FACTORY SETTINGS (factory level) continued Humidity Settings Control: Relative Hum Humidify:Computer Mod Auto-Flush: 24Hrs Dsat Cyc: 1M Off 5M On Hum Anticipation: No Control: Humidity can be controlled in two ways; by Relative Humidity (default) or by Dew Point. Humidify: The type and method of adding humidity selections are: None –...
Page 59 MENU J – FACTORY SETTINGS (factory level) continued Humidity Settings Dehum Mode: 1C In Limit Limit Reheat: 1 Comp Fan Speed Assist: Yes Reduce Speed: 20% Dehum Mode: The type and method of dehumidification, based on the number of compressors installed, the selections are: None –...
Page 60 MENU J – FACTORY SETTINGS (factory level) continued Economizer Settings Climate Zone: 2B Mode: Diff Enthalpy DX Assist Delay: 2min DX -> ES Delay: 5min DX Assist: 1 Comp Atmosphere: 1000mBar Note: The Economizer Settings screens are only displayed when the Airside economizer feature is enabled.
Page 61 MENU J – FACTORY SETTINGS (factory level) continued DX -> ES Delay: Once the compressor turns off, the damper will continue to be fully open for this time setting to make up for lost cooling capacity. After the time expires, the damper will return to temperature modulation. Range of adjustment is 0 to 60 mins with a default setting of 5mins.
Page 62 MENU J – FACTORY SETTINGS (factory level) continued Damper Status: This line will indicate “OK- Modulating” when the Airside Economizer is available to perform cooling. Otherwise, it will state what condition is preventing it from running. Damper Modulation: Shows the current damper modulation based on temperature demand.
Page 63 MENU J – FACTORY SETTINGS (factory level) continued Avg: (Shown only when using groups are used and using average setting). Allows you to choose how the average temperature of groups is made up. Range of selection is: All Groups (default), Highest 2 Groups to Highest 15 groups. Refresh Rate: This is how often the highest sensors and groups are determined.
Page 64 Import DEV File? When set to “Yes”, the controller will accept a DEV (a file containing all current settings) from another dap4 to be uploaded so it will be a copy of that controller. Note: Use of this feature will remove the Zone Control and/or Airside Economizer password keys from the controller.
Page 65: Menu K - Alarms & Limits (Service Level)
MENU K – ALARMS & LIMITS (Service Level) Alarm Settings Audio Mode: None Pwr-Up: Auto, No Alarm Maint Due Msg: 1000hrs Stdby Alms Active: 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 if there is an active alarm.
Page 66 MENU K – ALARMS & LIMITS (Service Level) continued Alarm Settings Comp Short Cycle: Floor Water Alarm Action: Alarm Only Reset Alarm Log: Alarm Screen Contact: No Contact Message Comp Short Cycle: When set to “Yes” (default) the short cycle alarm is enabled and will occur when a short cycle condition is detected.
Page 67 MENU K – ALARMS & LIMITS (Service Level) continued Flow Alarms No Water Flow Action: Alarm Only Wtr Flow Alm Dly: Air Flow Alm Dly: No Water Flow Action: The water flow alarm cannot be disabled and is checked only when there is a need for DX cooling or if the CW valve has opened at least 60%.
Page 68 MENU K – ALARMS & LIMITS (Service Level) continued Return Air Alarms Firestat Setpoint: 150• Hi Temp Alarm: Setpoint: • Lo Temp Alarm: Setpoint: • 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 69 MENU K – ALARMS & LIMITS (Service Level) continued Control Only).
Page 70 MENU K – ALARMS & LIMITS (Service Level) continued Hi Temp Alarm: When the temperature of any rack sensor rises above the alarm set point, a high rack temperature alarm will occur. This alarm is a warning only. The range of set point adjustment is 70 to 90°F with a default setting of 90°F. Lo Temp Alarm: When the temperature of any rack sensor drops below the alarm set point, a low rack temperature alarm will occur.
Page 71 MENU K – ALARMS & LIMITS (Service Level) continued E/S CW Temp Alarm High Temp Alarm: Delay: This Alarm screen will only appear if the CW Energy saver is enabled. High Temp Alarm: When enabled (default), the alarm will occur when the temperature of the water rises above the Energy Saver Setpoint and is no longer able to cool.
Page 72 MENU K – ALARMS & LIMITS (Service Level) continued Freeze Alarm Freeze-Stat Alarm: Yes Set Point: • Freeze-Stat Alarm: When set to “Yes” (default is No) Optional Analog input #1 is enabled and the temperature alarm is enabled. A freeze-stat alarm will cause the compressors to shut down and the fan to run at maximum speed.
Page 73 MENU K – ALARMS & LIMITS (Service Level) continued Comp Envelope Alarm Envelope Protect: Start-Up Delay: Run Outside Delay: Max Number Alarms: in 1 day to Lock-out Log Abnormal Zones: Envelope Protect: When set to “Yes” (default) the compressor envelope protection alarm is enabled.
Page 74 MENU K – ALARMS & LIMITS (Service Level) continued Pump-Down Alarm Failed PD Alarm: Note: Pump-Down feature will still operate. The Pump-Down Alarm screen will only appear if the feature is enabled in the Factory menu. Failed PD alarm: When set to “Yes” (default) the pump-down alarm is enabled. If set to “No”, the pump-down cycle will still operate, but without an alarm.
Page 75 MENU K – ALARMS & LIMITS (Service Level) continued CO2 Alarms Low CO2 Alarm: Setpoint: 100ppm High CO2 Alarm: Setpoint: 2000ppm This CO2 Alarms screen is only shown on the gPOD model. CO2 alarms are warnings only and will not prevent any of the unit functions from operating.
Page 76 MENU K – ALARMS & LIMITS (Service Level) - Custom Inputs Alarm Inputs Custom Alarm Messages Alarm #1 (DI-13) SEE TAG INSIDE DOOR Alarm #2 (DI-14) SEE TAG INSIDE DOOR Each of the custom alarm inputs can be given a unique message that will appear on its alarm screen.
Page 77 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs Alm Output Function 1 CW Sensor DA Sensor Fan Ovld Smoke Cond Wtr Firestat Each of the custom alarm outputs can be assigned to any one or more alarm conditions or functions.
Page 78 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs Alm Output Function 1 C1 Hi Prr N C1 Low Pr N C2 Hi N C2 Low N Short Cycl N Maint Timer C1 Hi Pr: Circuit #1 high pressure alarm. C1 Low Pr: Circuit #1 low pressure alarm.
Page 79 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs Alm Output Function 4 Override Air Flow Wtr Flow Power Up Floor Wtr Hum Inhibit Override: Scheduler in override mode. Air Flow: Loss of airflow alarm. Wtr Flow: Loss of water flow alarm. Power Up: Power restored alarm.
Page 80 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs Alm Output Function 6 Unit Stdby UPS is On Stdby Pump Hum Cyl C1 Lockout C2 Lockout Unit Stdby: Unit in standby by custom alarm input. UPS is On: Custom alarm input set for “UPS ON” mode. Stdby Pump: Custom alarm input set for “STANDBY PUMP ON”...
Page 81 MENU K – ALARMS & LIMITS (Service Level) continued - Custom Outputs Alm Output Function 8 Cond Fan Fault Evap Fan Fault VFD Fault Pump-Down High CW Tmp N Hi Disch T Cond Fan fault: Condenser fan communicated fault. Evap Fan fault: Evaporator fan communicated fault. VFD Fault: Custom alarm input set for “VFD FAULT”...
Page 83: Menu L - Configure I/O (Factory Level)
MENU L – CONFIGURE I/O (Factory Level) Notice: The I/O Configuration menu should only be used by qualified technicians. Improper setting may prohibit safety functions from working and affect the operation of controller. Digital Input AIR FLOW SWITCH Channel Action: Closed Delay: Status:...
Page 84 Maximum: 10.0vdc Analog Output Screen (one of 6 on large dap4) The top line identifies the function of the output. The second line indicates physical connection of the output. Action – Sets the direction that the modulation has on the 10v signal.
Page 85: Menu M - Set Zone Control
MENU M – SET ZONE CONTROL Notice: The Zone Control menu only appears on Unit 1 (dap4 set at address 1) when the Zone Control feature is enabled. Zone Control Zone ID:1 Units: 5 Online: 5 Finish Run -> Stdby: Yes...
Page 86 MENU M – Set Zone Control (continued) Avg Rack - The Zone Control 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 Control will modulate the fan speed of all running units in the zone to maintain static air pressure.
Page 87 MENU M – Set Zone Control (continued) Zone Control Temperature Assist: ES Before DX: Tmp Assist Band: Engy DX DBand: Standby On Delay: Standby Off Delay: 900s Enable Inhibit: Temperature Assist – If set to “Yes”, additional standby units will be requested to come on when the average zone temperature is higher than the cooling set point plus dead band plus 1.5°F.
Page 88 MENU M – Set Zone Control (continued) Zone Control Rotation: Day & Time Every Day at: 4:00AM Force Rotation: Rotation: To even out runtime among standby units, a scheduled rotation of the lead unit may be chosen. The available selections are: None –...
Page 89 MENU M – Set Zone Control (continued) Zone Control Units Note: U1 is the master Mode Unit #1: Stdby Unit #2: Prior Unit #3: Prior Unit #4: Off Unit #5: Stdby Each unit in the zone must be assigned a mode as described below. Note: More units may be displayed than are in the zone and their setting makes no difference.
Page 90 MENU M – Set Zone Control (continued) Zone Control Schedule Current Cfg: Primary Override Active: Override Time: 4 Hrs This screen will only appear when the secondary schedule is used. Current Cfg: shows which schedule is currently running. (Primary or Secondary).
Page 91 MENU M – Set Zone Control (continued) Zone Holiday Schedule Start Stop Setting 12/22 01/01 Secondary 07/03 07/05 Secondary -- -- -- -- ------ -- -- -- -- ------ The holiday schedule allows you to set a span of one or more days to run the schedule selected: Primary or Secondary.
Page 92 MENU M – Set Zone Control (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 93: 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 mini-dap4: 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 94 Mod to DeltaT: (Shown only on IRDX model). Fan will modulate to the difference between return and discharge temperature to maintain the delta temperature set point. Modulation is based on a PID algorithm that is limited by the minimum and maximum fan speed settings. Note: Except for the selections of Constant Speed and Mod to Comp optional sensors are required.
Page 95: Operation Of Chilled Water Cooling
Operation of Chilled Water Cooling The CW valve can be controlled by the Return or the Discharge air temperature. Either an On / Off valve or a 0-10v analog valve may be used: On / Off CW Valve (relay output DO-7 on minidap): The CW valve is opened when the temperature rises above Setpoint + Dead Band and closed when the temperature drops down to Setpoint.
Page 96 Switch to DX: On energy saver modes, if chilled water is cooling continuously without DX assistance for more than the “Switch to DX” time setting, the unit will switch to DX cooling for one hour to exercise the compressors. Water Flush Cycle: When the unit is on, but no CW cooling has occurred for 100hrs, the CW valve will be opened 100% for a period of 60 seconds.
Page 97: Operation Of Dx Cooling
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. A high-pressure alarm will require the switch to be manually reset and the alarm on the dap4 to be acknowledged.
Page 98 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 of your equipment. Standard On/Off compressors: When temperature is increasing: Stage 1 ON at Setpoint + Deadband Stage 2 ON at Setpoint + Deadband + Stage-to-Stage Stage 3 ON at Setpoint + Deadband + Stage-to-Stage X 2...
Page 99 Single Variable Speed Compressor (controlling return or discharge temp): C1 On: The variable compressor turns on when the temperature rises above the Setpoint + Deadband. As temperature continues to rise, the compressor will run faster to maintain the temperature setpoint. Note if the Energy Saver mode is running: The compressor turns on when the temperature rises above the Setpoint + Deadband + Stage to Stage setting + 1.0°F.
Page 100 Variable + Fixed Speed Compressor (controlling return or discharge temp): C1 On: The variable compressor (C1) turns on when the temperature rises above the Setpoint + Deadband. Note if the Energy Saver mode is running (Wtr Vlv configured as Engy Svg Cool or Aux Chill Wtr in factory menu).
Page 101 Dual Variable Speed Compressors (controlling return or discharge temp): C1 On: The first variable compressor turns on when the temperature rises above the Setpoint + Deadband. Note if the Energy Saver mode is running (Wtr Vlv configured as Engy Svg Cool or Aux Chill Wtr in factory menu).
Page 102: Operation Of Reheat
Operation of Reheat The dap4 can be configured to use the following reheat modes: None - No reheat installed, except SCR if enabled. One - A single stage of heat (default on minidap4). 1-Elect - A single stage of reheat used only in dehumidification mode.
Page 103 Enable SCR Y4: This enables the proportional SCR modulation of analog output Y4 whenever any of the heat outputs energize based on the heat mode selected above (if set as None, SCR operates the same as if set to “One”). HT2 (DO10) turns on when temperature drops below setpoint minus the Stage-To-Stage setting.
Page 104 HGRH: Hot Gas Reheat uses a proportional control valve that is modulated by a PID algorithm to maintain temperature of the discharge air temperature during dehumidification. The band setting determines the sensitivity of the algorithm. The smaller the band, the more the algorithm will try to correct the error. If the band setting is too low, the system will oscillate by being over-responsive.
Page 105: Operation Of Dehumidification
Operation of Dehumidification To remove humidity, the cooling coil must operate below the dewpoint temperature. Consequently, as the temperature drops reheat (if enabled) may stage on. Please see the operation of reheat section for more information. Humidity Anticipation: When this feature is enabled (set in the factory menu), the Humidity set point is offset +1% for every 1.5°...
Page 106 Dehumidification DX Unit: The type and method of dehumidification, based on the selected mode: None – No dehumidification mode (default setting) 1C In Limit – One compressor may run as long as return air temperature does not drop 2°F below the set point minus the dead band. Dehumidification will resume when the temperature rises to the set point.
Page 107 On/Off Compressors Controlling Dewpoint: In Dewpoint control mode, compressors are staged according to dewpoint, but the relative humidity level control shown above is also able to stage compressors on. Single Compressor as dewpoint is increasing: ON at High DP Setpoint Single Compressor as dewpoint is decreasing: OFF at High DP Setpoint minus DP DB Two Compressor staging as dewpoint is increasing:...
Page 108 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 109: 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 as described below. Non-Modulating, Controlling Relative Humidity: Humidification mode starts when humidity drops below the Humidity Setpoint minus the Humidity Deadband.
Page 110 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 111: Operation Of Zone Control
Zone Control is an optional feature that offers a dap4 control teamwork solution. Up to sixteen dap4 units may be arranged in the Zone Control network. Each unit in a zone is given a unique sequential network address. Unit 1 (unit at address 1) has menus with selectable features of: •...
Page 112 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”. Please contact the Data Aire service department to obtain a software update for USB installation if needed.
Page 113 Temperature Assist – If set to “Yes”, Unit 1 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*. ES Before DX: If set to “Yes”, (default is No) all units in the zone will run in CW Energy Saver mode prior switching to DX cooling.
Page 114 Zone Control Operation (continued) Unit Settings: Standby mode (default) allows Unit 1 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, Unit 1 may request the unit to be on. To satisfy the “Temperature Assist”...
Page 115 Every 1 to 24 Hrs, Every 48 Hrs - Rotation will occur at the selected time increment beginning from when the increment is selected. It is not based on the clock hour status. Rotation: Exercise U2 – (Only shown when two units are installed). This setting is used for applications when unit 2 is a “backup unit”...
Page 116: Operation Of Airside Economizer
Conversely, when the damper is “Closed” (at Min Damper %), mostly inside air is used. WARNING: There is no intent on the part of Data Aire, Inc. to define local codes and statutes which may supersede common trade practices, nor do we assume responsibility for their interpretation.
Page 117 Operation: For economic reasons, the Airside Economizer is the first stage of cooling, followed by Chilled Water cooling (if used) and then DX cooling. When this feature is enabled, the temperature being controlled will be defaulted to the Discharge Air. Many conditions must be monitored to determine if the damper can open.
Page 118 Band: This setting determines the sensitivity of the algorithm. The smaller the band, the more the algorithm will try to correct the error. If the band setting is too low, the damper will oscillate by being over-responsive. If the band setting is too high, the damper may lack responsiveness.
Page 119 BMS Control When the BMS sends an inhibit damper modulation command, it can also dictate the damper position. If no position is sent, the damper will be at minimum position. Damper Position Switches Optional end of travel switches can be mounted on the damper to verify that the damper is open (at maximum setting) or closed (at minimum opening setting).
Page 120: Alarms
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 helps troubleshooting what may be causing the alarm. Each alarm is logged in the History menu.
Page 121 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Smoke Smoke The smoke detector Check the smoke detector and Detector detector is sensing smoke reset it by cycling the power after sensing smoke smoke has cleared and will shut •...
Page 122 Alarm Screen Description & Possible Causes Corrective Actions Classification • • 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 (it will cut- in at •...
Page 123 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Return duct damaged High indoor temperature, check blower speed, and check • equipment selection Sensing Bulb is loose • Check return duct for leakage • Over charge of and check temperature entering refrigerant evaporator coil •...
Page 124 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Unusual rate of Check Connection building humidity gain • Calibrate sensor • Loose Connection • Check Humidity sensor and • Out of calibration replace if needed • Faulty Sensor •...
Page 125 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Not enough heat load Check discharge air temp sensor against the Temperature Sensor • Chart to verify resistance of Faulty Sensor sensor • Loose Connection • Check connection, cable and correct connection points •...
Page 126 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Faulty Sensor Use Sensor Chart to check Return Air temp sensor • Refrigerant charge is • incorrect Check Sub cooling and Superheat • • Chilled Water The CW CW cooling is locked CW cooling is locked out until E/S Temp too temperature is...
Page 127 Alarm Screen Description & Possible Causes Corrective Actions Classification • • **Urgent Wiring problem Check electrical wiring • • Bad Flow Switch Replace flow Switch • • Incorrect settings of Go to Menu L- Configure I/O and digital input on the change the Water Flow Switch controller action setting...
Page 128 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Dirty Filter Dirty filter Dirty filter (detected by Change Filter switch is tan mounted pressure detected differential switch) • Adjust differential pressure set point of switch • *Warning Calibrate differential switch •...
Page 129 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 of digital input on the controller • • C1 or C2...
Page 130 Alarm Screen Description & Possible Causes Corrective Actions Classification • • 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 set point Temperature Temp Alarm...
Page 131 Alarm Screen Description & Possible Causes Corrective Actions Classification • • Incorrect settings Check CO2 Sensor • • Faulty Sensor Calibrate sensor • Out of calibration • • Low CO2 CO2 level is Co2 level is lower than Check Co2 Level higher than normal alarm set point...
Page 132 Alarm Screen Description & Possible Causes Corrective Actions Classification • *Warning* travel switch did not Check damper mechanical close. operation • • Damper Pos. Damper The modulated Check damper position sensor Feedback position sensor position sent to the reading in closed position. Value Does Not does not match damper actuator is not...
Page 133: Wiring Connections
Wiring Connections...
Page 134 Dap4 Wiring Connections - continued Digital Outputs Pin ID Connector 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 J13-4 TB1-8 J14-1 TB1-9 Status Contact (function is selectable)
Page 135 SCR heat J4-2 TB2-35 J20-1 Variable Compressor J4-2 TB2-35 J20-2 Damper for Airside Economizer J4-2 TB2-35 Temperature VS resistance table (Data Aire normal NTC only) Deg. F Kohm Deg. F Kohm Deg. F Kohm Deg. F Kohm Deg. F Kohm 27.28...
Page 136: 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 137 714-921-6022 Parts Sales Web Site: www.dataaire.com Job/Unit Information: Data Aire Job Number: Serial Number: Model Number: Date Installed: Installing Contractor: ISO 9001-2015 Certified A member of the CS Group of Companies Copyright 2021 Data Aire, Inc. Publication: dap4 User Manual 5/10/2021...

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