Before You Begin Configuring Your Unit Controller
To configure the unit controller, users must understand the application and identify the equipment configuration. Typical configurations include:
- Constant Volume
- Variable Air Volume (VAV)
- Economizer
- Hot Gas Reheat
- Dual Stage
- Four Stage
- Heat Pump
- Thermostat Controls
- Network Sensor Control
- Space Sensor Control
- Discharge Air Control
The joystick allows for up and down movements to move the cursor (>) and scroll through selections in the active menu section. An example of the UCB Top Level Menu is shown below:
Each menu selection represents either a submenu or a property. Pressing the Enter button displays the items in the submenu or the values of the selected property. Moving the joystick up or down displays values of other properties.
Understanding the Local LCD
After applying power to a rooftop unit (RTU), a start-up countdown begins on the Unit Control Board (UCB) LCD. The screen will be blank when the controller is ready and no faults are present. Navigation through the menus is done using the joystick and two push buttons below the LCD. The button layout includes an "ENTER" button, a "CANCEL" button, and a "JOY" (joystick) control.
Powering the Unit
When 24 V power is applied to the C and 24V terminals, the UCB initiates a start-up sequence. The LCD scrolls "Johnson Controls" on the top line and "JCI" on the bottom line during this process. The display backlight and green Power LED remain lit as long as power is applied. The red Fault LED lights, goes off briefly, and then flashes throughout the start-up sequence. The green SA Bus LED lights briefly. During start-up, the joystick, Enter, and Cancel buttons are non-functional. The LCD shows a countdown on the top line.
FAULT
SA BUS
Johnson
JCI
Approximately 15 seconds after power-up, the green SA Bus LED either lights to indicate the UCB has not established communication and is awaiting SA Bus devices, or flashes to indicate communication has been established. Once the start-up sequence finishes, the display shows "XxXx" on both lines if no alarm is active. The red Fault LED stops flashing and turns off, and the joystick, Enter, and Cancel buttons become operational.
FAULT
SA BUS
18
Commissioning with the Local LCD
The Commissioning view's second level menus consist of nine main menus and several submenus. An example of the Commissioning View Second Level Menus is shown below:
Commissioning View Submenus
Equipment configuration determines which menus appear in the Commissioning view. The joystick is used to move between menu options, and Enter is pressed to select an option. The following table describes the Commissioning View submenus. An asterisk (*) indicates menus that depend on the specific configuration.
| Level 2 | Level 3 (LCD Screen Name) | Level 4 (Default Values) | Available Values |
|---|---|---|---|
| HVAC Zone | Occupancy Mode (OccMode) | OccMode (external) | Schedule |
| Indoor Fan | Continuous Supply Fan Operation in Occupancy Mode (FanOn Occ) | FanOn Occ Yes | Yes or No |
| *Duct Pressure Setpoint (DctPres-Sp) | DctPrs-Sp 1.50"/w | .00"/w to 4.99/w | |
| *Occupied: No Heat or Cool % Command (Fan Only-% Cmd) | Fan Only-%Cmd 50% | 0 to 100% | |
| *Occupied: One Stage of Cool% Command (1ClgStg-%Cmd) | 1ClgStg-%Cmd 70% | 0 to 100% | |
| Occupied: Two Stage of Cool % Command (2ClgStg-%Cmd) | 2ClgStg-%Cmd 80% | 0 to 100% | |
| Occupied: Three Stage of Cool % Command (3ClgStg-%Cmd) | 3ClgStg-%Cmd 90% | 0 to 100% | |
| Occupied: Four Stage of Cool % Command (4ClgStg-%Cmd) | 4ClgStg-%Cmd 100% | 0 to 100% | |
| *Occupied: One Stage of Heat % Command (1HtgStg-%Cmd) | 1HtgStg-%Cmd (100%) | 0 to 100% | |
| Occupied: Two Stage of Heat % Command (2HtgStg-%Cmd) | 2HtgStg-%Cmd (100%) | 0 to 100% | |
| Occupied: Three Stage of Heat % Command (3HtgStg-%Cmd) | 3HtgStg-%Cmd (100%) | 0 to 100% | |
| Cooling (Clg) | Cooling Mode Enabled For Operation (Clg-En) | Clg-En Yes | Yes or No |
| Lead/Lag Equalize Cooling Stage Runtime Enabled (LeadLag-En) | LeadLag-En No | Yes or No | |
| *VAV Cooling Supply Air Temp Upper Setpoint (SATUp-Sp) | SATUp-Sp 72°F | 41 to 72°F | |
| *VAV Cooling Supply Air Temp Lower Setpoint (SATLO-Sp) | SATLO-Sp 55°F | 40 to 69°F | |
| *VAV Supply Air Temp Reset Setpoint (SATRst-Sp) | SATRst-Sp 72°F | 40 to 85°F | |
| *CV Occupied Cooling Setpoint (ClgOcc-Sp) | ClgOcc-Sp 72°F | 45 to 98°F | |
| CV Unoccupied Cooling Setpoint (ClgUnocc-Sp) | ClgUnocc-Sp 85°F | 46 to 99°F | |
| Heating (Htg)* | *Heating Mode Enabled for Operation (Htg-En) | Htg-En Yes | Yes or No |
| *VAV Occupied Heating Enabled (HtgOcc-En) | HtgOcc-En No | Yes or No | |
| *VAV UnOccupied Heating Enabled (CVHtgUnocc-En) | CVHtgUnocc-En No | Yes or No | |
| *VAV Unoccupied Heating Setpoint (VAVHtgOcc-Sp) | VAVHtgOcc-Sp 60°F | Yes or No | |
| *CV Occupied Heating Setpoint (CVHtgOcc-Sp) | CVHtgOcc-Sp 68°F | 46 to 99°F | |
| *CV Unoccupied Heating Setpoint (CVHtgUnocc-Sp) | CVHtgUnocc-Sp 60°F | 45 to 98°F | |
| *Economizer (Econ) | Economizer Enabled for Operation (Econ-En) | Econ-En Yes | Yes or No |
| Free Cooling Selection (FreeClg-Sel) | FreeClg-Sel Auto | Dry Bulb Temperature, single enthalpy, dual enthalpy | |
| Economizer Outdoor Air Temp Enable Setpoint (EconOAT-SpEn) | EconOAT-SpEn 55°F | 40 to 80°F | |
| Economizer Outdoor Air Enthalpy Setpoint (EconOAEnth-Sp) | EconOAEnth-Sp 27 B/# | 10 B/3 to 50 B/# | |
| Low Ambient Economizer Setpoint (LowAmb-Sp) | LowAmb-Sp 0°F | 0 to 60°F | |
| Low Ambient Economizer Minimum Position (LowAmb-MinPos) | LowAmb-MinPos 0% | 0 to 100% | |
| Maximum IAQ Ventilation Economizer Position (IAQEcon-MaxPos) | IAQEcon-MaxPos 50% | 0 to 100% | |
| *Demand Ventilation (Dvent) | Demand Ventilation Mode of Operation (DVent-Mode) | DVent-Mode Disabled | Controlled by IAQ (Difference between IAQ and OAQ) |
| Demand Ventilation Maximum Economizer Position (DVentMaxEconPos) | DVentMaxEconPos 50% | 0 to 100% | |
| Demand Ventilation Indoor Air Quality (DVentIAQ-Sp) | DVentIAQ-Sp 1000 ppm | 0 to 5000 ppm | |
| Demand Ventilation Differential Setpoint (DVentDiff-Sp) | DVentDiff-Sp 600 ppm | 0 to 5000 ppm | |
| Indoor Air Quality Sensor Range (IAQRange) | IAQRange 2000 PPm | 0 to 5000 ppm | |
| *Demand Ventilation (Dvent) | Outdoor Air Quality Sensor Range (OAQRange) | OAQRange 2000 ppm | 0 to 5000 ppm |
| *Power Exhaust (PowerEx) | *Building Pressure Setpoint (Bldg-Sp) | Bldg-Sp 100% | -.250 to .250 in/w |
| *Exhaust Damper Position for Exhaust Fan to Turn On (ExDmpPosFanOn) | ExDmpPosFanOn 80% | 20 to 99% | |
| *Economizer Damper Position for Exhaust Fan to Turn Off (EconDmpPosFanOff) | EconDmpPosFanOff 20% | 20 to 99% | |
| *Economizer Damper Position for Exhaust Fan to Turn On (EconDmpPosFanOn) | EconDmpPosFanOff | -.249 in/w to .249 in/w | |
| *Economizer Damper Position for Exhaust Fan to Turn Off (ExDampPosFanOff) | ExDampPosFanOff 20% | 10 to 89% | |
| *ERV Enabled ERV-En | ERV-En No | Yes or No | |
| *ERV Unoccupied Fan Enabled ERVUnoccFan-En | ERVUnoccFan-En No | Yes or No | |
| *Hot Gas Reheat (HGR) | *Hot Gas reheat Enabled for Operation (HGR-En) | HGR-En Open | Open or Closed |
| *Hot Gas Reheat Humidity Setpoint (HGRHum-Sp) | HGRHum-Sp 50%H | 0 to 100%H | |
| *Hot Gas Reheat Alternate Operation Enabled (HGRAItWrite) | HGRAItWrite No | Yes or No | |
| Network | Device Name (DevName) | DevName UCBApp | None |
| BAS Communication (BASCom) | BASCom BACnet | None | |
| Address (Address) | Address 4 | 0 to 127 |
Validating your Configuration
The Details > Service > Inputs menu can be used to ensure configuration parameters are correct. This view displays input values for each input, including Sensor and Coil Sensor values. If no input value appears, the input states "No Input". This feature helps verify that all configuration parameters are set and reading properly.
IMPORTANT: Remember to save configuration parameters using the Update > Backup feature with the USB port on the UCB. Refer to connecting a flash drive and performing a system configuration backup for more information.
Connecting your Flash Drive
When a flash drive is connected to the USB port on the UCB, "USB:Wait" appears on the display.
Scan 0
If "USB:Wait" does not appear, ensure the flash drive is properly connected and compatible with the UCB. After a few seconds, the UCB displays "USB:OK". The "Scan" number indicates the files and folders in the top level of the flash drive.
Scan 18
The flash drive can remain connected after the scan. Users can press the Enter button, Cancel button, or move the joystick to navigate the display menu.
Performing a System Configuration Backup
To perform a system configuration backup, insert a flash drive into the USB port, navigate to the Update > Backup menu, and press Enter. While the backup is in progress, "BKP:Wait" appears, the colon (:) flashes on the top line, and the percentage increases on the bottom line of the display. The backup typically completes in approximately 30 seconds, displaying "BKP:OK" and "100%" when finished.
Restore
bCfg 100
Once the backup is complete, a comma-separated value (.csv) restoration file is created in the top level of the flash drive. The file name is derived from the date and time settings in the UCB at the time of creation. For example, a file name might be RTU_2013-11-30T114609.csv, where:
RTUis the unit type.2013is the Year.11is the Month.30is the Day.11is the Hour (Military Time).46is the Minute.09is the Second..csvis the file extension.
The restoration file size is generally less than 30 KB. This backup file can be used to restore the configuration to the unit, retrieve the configuration after an upgrade, or make setpoint changes using the Upgrade > Restore feature.
The Partial Cloning feature allows using configuration parameters from one unit's backup file to update data on another unit. This is done via the Upgrade > Part Clone feature on the target unit. The Full Cloning feature should only be used when replacing the UCB board.
The flash drive can be removed from the USB port after the backup.
