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EVAPCO eco-Air Series User Manual

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EVAPCO Controller User's Manual
AIR COOLED · ADIABATIC · FLUID COOLERS · CO
GAS COOLERS · REFRIGERANT CONDENSERS
2
For EVAPCO authorized parts and
service, contact your local EVAPCO
representative today!

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Summary of Contents for EVAPCO eco-Air Series

  • Page 1 EVAPCO Controller User’s Manual AIR COOLED · ADIABATIC · FLUID COOLERS · CO GAS COOLERS · REFRIGERANT CONDENSERS For EVAPCO authorized parts and service, contact your local EVAPCO representative today!

  • Page 2: Table Of Contents

    Controller User Manual Table of Contents Introduction ....................................... 3 EVAPCO Controller .................................... 3 Installation and Wiring ....................................3 Safety ........................................3 Panel Installation Considerations ................................ 4 Temperature/Pressure Sensor Installation ............................4 Wiring Considerations ..................................6 Operation and Servicing ..................................6 Screen Navigation ....................................

  • Page 3: Introduction

    EVAPCO Controller will ensure that your eco-Air unit provide years of service at peak efficiency. The EVAPCO Controller serves as a single connection point for the eco-Air unit and contains all of the protection and logic devices required to run the eco-Air unit in the most efficient manner possible.

  • Page 4: Panel Installation Considerations

    When the EVAPCO Controller does not ship factory mounted on the eco-Air unit, the EVAPCO Controller should be placed in close proximity to the eco-Air unit to reduce the wire lengths required. If the EVAPCO Controller is within sight of or mounted on the eco- Air unit, the EVAPCO Controller may be used as the main electrical disconnect for the eco-Air unit.
  • Page 5 When the EVAPCO Controller ships factory mounted to the eco-Air unit, the supplied temperature or pressure sensor must be wired to the junction box location on the connection end of the eco-Air unit (Figure 3). If the EVAPCO Controller does not ship factory mounted, the supplied temperature or pressure sensor must be wired to the EVAPCO Controller.

  • Page 6: Wiring Considerations

    Consult the supplied wiring diagram for detailed wiring information. All field wiring is indicated by dashed lines on the wiring diagram. All wiring in and out of the EVAPCO Controller should be with copper conductors and wire lengths must be kept as short as possible.

  • Page 7: Screen Navigation

    The operator interface of the EVAPCO Controller. Figure 5 provides an overview of the various screens and menus of the EVAPCO Controller. Pressing the Back button will return to the previous screen. The status button is only present for units equipped with either precooling or EC type fans.

  • Page 8: Modifying A Value

    Navigating the Scheduler Several functions of the EVAPCO Controller can be scheduled to operate during certain periods of the year or at certain times of the day. In this example, consider a noise restriction from 8:00pm to 5:30am starting Friday night and ending Saturday morning. During the noise restriction hours, the fan speed will be limited via the Quiet Mode.
  • Page 9 Controller User Manual Each block represents a half hour increment of time. By touching a block, the P icon will appear, and the function will be activated for that timeframe. Note that the first block represents 12:00am to 12:30am. Figure 8 The 8:00pm to 12:00am blocks are selected.

  • Page 10: Operator Interface Screens

    EVAPCO logo (Figure 10) appears. After the screens have loaded, the HMI will transition to the Main Home Screen. If there is no interaction with the HMI for more than fifteen minutes, the EVAPCO logo will reappear. Touching the HMI will return the screen to the Main Home Screen.
  • Page 11 Controller User Manual If the eco-Air unit is equipped with a pre-cooling system, the status of the solenoid valves are shown at the right hand side of the screen as shown in Figure 11. Image Description Pre-cooling system is inactive (solenoid valve is closed). Pre-cooling system is active (solenoid valve is open).

  • Page 12: Status Screen

    Controller User Manual Status Screen The Status Screens provide real time status of the solenoid valves and EC type fans. These status screens are only available with units equipped with precooling or EC type fans. Note that all values shown on the Status Screens are read only. To view additional status screens, press the Status button on the main home screen.

  • Page 13: Alarms Screen

    Controller User Manual When the eco-Air unit is equipped with EC fan motors, the status and current speed of the fan motors may be viewed. Depiction of the fans is not reflective of the arrangement of fans on the unit. The live fan motor speeds are in rpm. Figure 14 Fan Status Screen Image...
  • Page 14 Controller User Manual Alarms will appear in the log as either Active, Ack, or Return. Table 3 illustrates each of the three states. The date and time columns of the table indicate when the alarm was triggered. If an alarm is acknowledged, while active, the time stamp will be displayed in the ACK Time column.

  • Page 15: Main Menu Screen

    (i.e. BAS), the On/Off Control screen is the only way to disable the eco-Air unit without removing power. Note that the EVAPCO Controller must be switched on locally before the unit will operate even if the EVAPCO Controller is being controlled via a BAS or digital input.

  • Page 16: View Setpoints Screen

    Unit is being controlled via a digital input and may be enabled by sending an enable Off by Digital Input signal to the EVAPCO Controller. Off by HMI Unit is turned off manually and may only be enabled via the On/Off Control Screen.

  • Page 17: Scheduler Screens

    Controller User Manual Scheduler Screens The Scheduler Screens allows the internal clock of the EVAPCO Controller to be set as well as the scheduling of several routines. If enabled, the following routines may be programmed during certain periods of certain days:...
  • Page 18 The internal clock of the EVAPCO Controller may be set in the screen shown in Figure 21. If any of the scheduler functionality of the EVAPCO Controller is used, it is vital that the clock be set to the proper time. The clock is used to add timestamps to the alarms shown in the System Alarms screen.

  • Page 19: Input/Output Screens

    Input/Output Screens Figure 22 displays the current state of all digital inputs, digital outputs, analog inputs, and analog outputs of the EVAPCO Controller. This screen is primarily used for troubleshooting and start-up purposes to determine if the correct signals are being sent to and from the EVAPCO Controller.
  • Page 20 Controller User Manual After logging in and pressing the Service button, the screen will display the service submenu options as shown in Figure 24. If the unit is enabled the options for I/O Test and BMS & Network will not be available. Turn the unit off to enable these options, as shown in Figure 25.
  • Page 21 Controller User Manual Pressing the Language button will change the screen to the one shown in image 26. The language drop down will allow the user to select between a preset number of available languages. The language selection at startup option can be enabled and disabled. This will prevent the Language screen from being the first screen that is displayed after the controller boots up.
  • Page 22 The data points will create a piece-wise graph that the EVAPCO controller will use to linear interpolate the saturated condensing temperature based on the input pressure reading.
  • Page 23 Controller User Manual The EVAPCO Controller provides two methods of automatic setpoint control. When the Fan Speed Control: is set to PID, the fan speed will be adjusted based on the deviation of the process temperature to the desired setpoint by a PID regulator. Note that there are several factors that may influence the behavior of a PID controller, and the proper tuning parameters may vary from the factory defaults.
  • Page 24 Controller User Manual The Fan Speed/Temperature Screen shown in Figure 31 determines the various speeds at which the eco-Air unit runs in various modes. Note that the fan speeds are set in percentage of the fan motor’s nameplate speed. The energy saving speed is not active unless the eco-Air unit is equipped with a precooling system.
  • Page 25 Controller User Manual The EVAPCO Controller is equipped with two process temperature setpoints. Setpoint #1 is for normal operation while Setpoint #2 can be initiated either through the scheduler, digital input, or based on ambient temperature conditions. When the fan speed control is set to Proportional, the additional Temperature Proportional Band parameter is made available.
  • Page 26 Controller User Manual Graph The 5°F and 10°F temperature regulation band samples. If equipped with a precooling system, the screen shown in Figure 33 will be accessible. The parameters contained in this screen are used to determine various temperature setpoints that will active the precooling system, along with timers to ensure hysteresis protection of the system.
  • Page 27 Controller User Manual Table 14 A description of the increase and decrease timer parameters. The temperature switch points set a minimum temperature at which the precooling system stages may become active. Note that this setting is not used for freeze protection but is instead intended to prevent the precooling system from operating during periods of the year when evaporative cooling is not required.
  • Page 28 By default, the EVAPCO Controller will be set to local control via the operator interface. Note that it is possible to use a building management system to only monitor the EVAPCO Controller while the on/off control is done locally at the operator interface.
  • Page 29 Controller User Manual Figure 35 Various modes of operation triggers with EC Fan Fail-Safe function visible Parameter Description Default Enable Failsafe Enables or disables the failsafe feature. Delay Time The amount of time that must elapse before the failsafe feature is 30 seconds activated.
  • Page 30 Manual Management allows several operations of the EVAPCO Controller to be manually triggered or controlled. Note that while being controlled manually, the EVAPCO Controller will not have the ability to maintain a specific process setpoint. The Analog Output of Fans Screen allows the fan speed to be manually adjusted to any speed between 0% and 100% one the Manual Management function is enabled.
  • Page 31 Controller User Manual The working hours screen displays the current working hours of the fan motors, and the precooling system valves since the last reset of the working hours. To reset the working hours, see Figure 36. Figure 3 8 A list of the working hours for the fan and solenoid valves.
  • Page 32 Controller User Manual All EVAPCO Controllers can communicate with a BMS via Modbus RTU, Modbus TCP/IP, BACnet MS/TP, and BACnet IP. Consult the supplied wiring diagram for the proper wiring configuration. The BMS configuration screen allows the various communication parameters to be set. After changing any of the communication parameters, the Update button must be pressed for 3 seconds in order for the change to take effect.

  • Page 33: Manufacturer Screens

    Controller User Manual Manufacturer Screens The Manufacturer Screens are for use by EVAPCO authorized factory technicians to configure the EVAPCO Controller. Figure 41 The main menu screen highlighting the Manufacturer button.

  • Page 34: Terminology

    Controller User Manual Terminology BMS (Building Management System): Also referred to BAS (Building Automation System) is a system that allows users to control multiple equipment from a central location. PID (Proportional-Integral-Derivative) Controller: A control loop feedback mechanism used in industrial control systems. By adjusting control outputs, a PID controller attempts to minimize the difference between a measure process variable and a desired setpoint.

  • Page 35: Alarm Event Description

    Controller User Manual Alarm Event Description Alarm Description Analog Input #1 Error The sensor probe connected to analog input #1 is not providing the expected feedback. Analog Input #2 Error The sensor probe connected to analog input #2 is not providing the expected feedback. Fan Fault #1 The motor drives connected to the fan fault #1 digital input have tripped.
  • Page 36 Controller User Manual For Single Stack units equipped with EC type fans, the following is a list of alarms and warnings pertaining to the motors. The list is typical of Fan #1 to Fan #20. Alarm Description Fan #1 Phase Failure Alarm A phase of the supply voltage is either lost or poor grid quality Fan #1 Output Stage Overheating The temperature of the motor drive has exceeded a safety limit.
  • Page 37 Controller User Manual For Double Stack units equipped with EC type fans, the following is a list of alarms and warnings pertaining to the motors. The list is typical of Fan #1 to Fan #12. Alarm Description Fan #1 Low Line Voltage The line voltage is too low.
  • Page 38 Controller User Manual Notes:...

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