Quick Start and Operations Manual

Introduction

This document serves as a quick start guide for the Daikin Applied Rebel rooftop unit. It outlines step-by-step procedures for efficient startup. It is recommended to read IM 1125 and OM 1141 before operating the unit and to follow all procedures and hazard identifications within those manuals. IM 1125's warranty registration form details initial start-up, fan, mechanical cooling, and heating procedures. Refrigerant pressures, subcooling, and superheat can be monitored via the MicroTech® unit controller, eliminating the need for refrigerant gauges during startup. Schrader fittings are intended solely for evacuation and charging, unless transducer readings require confirmation.

Operational, Installation and Maintenance Resources

• Rebel Unit Installation Manual: IM 1125
• Rebel Unit Controller Discharge Air Control (VAV or CAV): OM 1141
• MicroTech® Unit Controller Options: IM 1244
• BACnet® & LonWorks® Integration: ED 15112
• Daikin Applied System Manager: IM 1253

Unit Inspection (perform before operation)

1. Visually inspect the unit for damage, both internally and externally. Document any damage. Claims for freight damage must be filed by the consignee.
2. Confirm the unit's location adheres to ventilation and service clearance recommendations as specified in IM 1125, "Unit Clearances".
3. Verify the unit's condensate drain has been installed according to IM 1125, "Unit Piping – Condensate Drain Connection".
4. For VAV units, confirm that the duct static pressure sensor tubing and/or building static pressure tubing have been installed per IM 1125, "Installing Duct Static Pressure Taps".
5. Confirm the discharge air sensor is correctly installed in the supply duct.
6. Confirm all field wiring is complete.

NOTE: Ensure power is removed before making field connections. Connecting with power applied could damage the controller.

Main Power Supply

STEP 1

Confirm that the electrical power wiring lugs are tight. Verify proper voltage against the submittal and the unit's wiring diagram. NOTE: Incoming power should not exceed a voltage imbalance of 2%.

STEP 2

Using a Phase Sequencing Tester, confirm that all power sources are phased correctly for clockwise rotation.

Diagram Description: A simple wiring diagram showing customer-supplied power (L1, L2, L3) connected to terminals T1, T2, T3, with a wire for CW phase monitor.

Passwords

STEP 3

Various menu functions are accessible or inaccessible based on the user's access level and entered password. There are four access levels: no password, Level 2, Level 4, and Level 6, with Level 2 offering the highest access. Without a password, only basic status items are available. Entering the Level 6 password (5321) grants access to Alarm Lists, Quick Menu, and View/Set Unit menus. The Level 4 password (2526) adds Commission Unit, Manual Control, and Service menus. The Level 2 password (6363) includes the Unit Configuration Menu.

The main password page appears upon initial access, pressing the Home key, pressing the Back key multiple times, or after a period of inactivity (default 10 minutes). This page allows password entry, access to the Quick Menu, viewing unit state, and accessing alarm lists. Alarms can be acknowledged without a password.

Temperature Controls Set Up / DAT Control with Space Temp

STEP 4

For Rebel units (3 to 15 ton), confirm the space sensor is connected to terminal block #2 at terminals 120, 121, and 132, with the wire shield grounded to terminal 132G. For units (16 to 28 ton), terminal designations are 210, 211, and 212, with power at terminal 200. Refer to page 7 for detailed wiring connections for field-installed space sensors.

STEP 5

Navigate to the Commission Unit menu, select "Htg/Clg ChgOvr Set Up". To use the space sensor for control, select "Space" under "Control Temp Source". To allow the space sensor to control thermostat settings, scroll to "Use Tstat Spt" and change the default "No" to "Yes". Then, scroll to "Apply Tstat Chg" and change "No" to "Yes" to apply the changes. The unit will cycle off to implement programming changes.

NOTE: Space cannot be selected as the control temperature source if no space sensor is installed.

When DAT is selected as the control type, the control temperature source can be Space Temperature, Return Temperature, Outdoor Air Temperature, Mixed Air Temperature, or None. This sensor dictates heating or cooling calls. If the thermostat is not set to control, proceed to step 6. Navigate to the "View Set Unit" menu, then to cooling, and set occupied/unoccupied setpoints and DAT. Repeat for heating.

NOTE: A three to four-degree spread between cooling and heating setpoints is recommended.

Cooling Commissioning

STEP 6

Navigate to the "View/Set Unit/ Cooling Menu" and scroll to "Occ Clg Spt" (Occupied cooling setpoint). Adjust this setpoint according to the desired control temperature source location. For example, setting Occ Clg Spt to 72°F for a 72°F space temperature means cooling will activate when the space reaches 73°F (setpoint + 1°F deadband). The unit aims to deliver 55°F during cooling. DAT adjustments can limit short cycling. Cooling terminates when the space temperature reaches 71°F (setpoint - 1°F deadband).

Heating Commissioning

STEP 7

Navigate to the "View/Set Unit/ Heating Menu" and scroll to "Occ Htg Spt" (Occupied heating setpoint). Adjust this setpoint based on the desired control temperature source. For instance, setting Occ Htg Spt to 70°F for a 72°F space temperature means heating activates when the space drops to 69°F (setpoint + 1°F deadband). The unit aims to deliver 85°F during heating. DAT adjustments can limit short cycling. Heating terminates when the space temperature reaches 71°F (setpoint + 1°F deadband).

If setpoints are entered as described and the default 2°F deadband is used, the unit will operate in a fan-only state between 71°F and 73°F.

NOTE: The occupied heating setpoint must be less than or equal to the occupied cooling setpoint. Conflicts in entered values will automatically adjust the occupied heating setpoint down to match the cooling setpoint.

Minimum Outdoor Air Damper Position

STEP 8

Navigate to the "View/Set Unit > Min OA Damper" menu. Select "Vent Lmt=" (ventilation limit) and adjust it to jobsite conditions. The ventilation limit defines the required outdoor airflow at full fan speed. The balancing contractor will specify the damper percentage needed for required outdoor air, typically determined by the design engineer and local codes. Select "LoFlo V Lmt=" (low flow ventilation limit) and set the damper position for low fan speed. When the fan speed decreases, the outdoor air damper must open further to maintain ventilation air. The balancing contractor must also verify the damper position at low fan speed.

Economizer Commissioning

STEP 9

Navigate to the Commission Unit > Econo Set-up menu. Economizer operation uses a change-over temperature, similar to cooling and heating modes. Adjust "Chgover Temp=" (change-over temperature) to the jobsite condition. The default 70.0°F allows free cooling when the outdoor temperature is below this value. The unit may also feature comparative enthalpy control, where the controller compares return and outdoor air enthalpy for free cooling suitability, applicable only when the outdoor air temperature is below the set Chgover Temp=.

Supply Fan Commissioning

STEP 10

Navigate to Commission Unit/SAF Set-Up and select the desired Supply Air Fan (SAF) control type. The default is DSP (duct static pressure), which maintains a set duct static pressure. "Spd/Net" is used with building management systems that write speed commands. "1Zn VAV" adjusts fan speed based on temperature setpoint proximity. CO2 selection controls fan speed based on CO2 ppm, and CFM selection uses minimum and maximum CFM setpoints.

NOTE: If "1ZnVAV" is selected, configure minimum and maximum heating/cooling speeds (e.g., Cooling: 60% min, 90/100% max; Heating: 60% min, 90/100% max). If CO2 is selected, verify the default PPM settings.

Optional Return/Exhaust Fan Commissioning

STEP 11

Check the configuration menu (spot 16 for fan type, spot 17 for control method) to determine how the unit's power exhaust or return fan is intended to be controlled. Navigate to Commission Unit > RF/EF Set-Up. Exhaust fans can be controlled by building pressure, supply fan speed percentage, outside air damper opening percentage, or Speed Net (BMS communication). "Tracking" fans follow the supply fan speed (5% to 100%). "BldgP" (Building static pressure) uses a transducer to adjust fan speed. "Spd/Net" is for BMS integration. "OA Damper" controls the exhaust fan based on the outside damper position (default 40% setting; fan turns ON if damper is above this).

Optional Dehumidification Control Commissioning

STEP 12

The unit may offer dehumidification control when space humidity or dewpoint exceeds the setpoint. Navigate to View/Set Unit > Dehumidification. Change the default "None" to "Relative Humidity" or "Dew Point". Enter the desired setpoint for the chosen method.

NOTE: Ensure a humidity or enthalpy sensor is wired to the controller. Check wiring diagrams for proper terminals. If gas heating is available, it can be used for reheat during dehumidification if configuration positions 28 (ModHG) and 10 (3,4,5,7, or 8) are set accordingly. To enable this, navigate to Commission Unit > Dehum set-up > Backup RH Enable and select "Yes". For gas burner reheat assistance, ensure reheat is on and at 100% for at least 5 minutes.

Start-Up of the Supply and Return Fans for Air Balancing

Fans are typically started before the unit's functional startup. VFDs are shipped with parameters for proper fan operation. If these parameters are altered, it may cause delays for the startup technician. To run fans without altering drive parameters:

• Enter level 4 or 6 password (2526 / 6363).
• Navigate to Manual Control and select it.
• Change Manual control from Normal to Manual.
• Change the Supply fan from OFF to ON.
• Set the SAF SPD Cmd from 0% to the desired fan speed (0 to 100%).

Follow the same procedure for return or exhaust fans. To finish, return to Manual Control and change it back to Normal. The unit will shut down and be ready for an operational run command.

Start-Up

Once all setpoints and operational information are entered, the unit is ready for startup. Ensure all doors are closed, filters and traps are installed, and no personnel are near moving parts. Unit power should have been on for at least 24 hours before starting the refrigerant system.

From the main menu, after entering your password, select the "Occ Mode" (occupied mode):

• Occupied: Unit runs continuously until commanded OFF.
• Unoccupied: Unit remains off but ready for operation.
• Auto: Unit responds to BMS commands or contact closures.

Next, select the "Ctrl mode" (control mode):

• Heat only: Supplies heating only.
• Cool only: Supplies cooling only.
• Fan only: Operates the fan only.
• Heat Cool: Provides heating and cooling based on setpoints.
• Auto: Provides heating or cooling as determined by the building management system.

During startup, the unit performs a 180-second "Start-Up" procedure to confirm sensor functionality. This is followed by a 180-second recirculation mode to stabilize space conditions. After recirculation, the unit enters heating/cooling mode if the control temperature is above/below setpoints, or operates in "fan only" if at setpoint.

Compatible Thermostats for Rebel Units

Space Sensor with Setpoint and Tenant Override

Part Number: 113117801

Diagram Description: Shows a Wall Sensor with Set Point Adjustment, connected to a unit control panel via terminals 132, 212, 120, 210, 121, 211. Includes 10k Thermistor and Tenant Override Button connections. Notes that the shield wire grounds at the RTU chassis.

Space Sensor with Setpoint and Tenant Override

Part Number: 910143408

Diagram Description: Shows a Wall Sensor with Set Point Adjustment, connected to a Unit Control Panel via terminals TB2 (132, 212, 120, 210, 121, 211). Includes 10k Thermistor and Tenant Override Button/GND connections. Also shows a Daikin thermostat display unit.

Space Sensor with Setpoint and Tenant Override

Part Number: 910143408

Diagram Description: Shows a BAPI Combo Sensor with connections for Tenant Override, 10k Thermistor, and Humidity (0-10VDC), connected to a Unit Control Panel. Includes Set Point Adjustment. Also shows a Daikin thermostat display unit.

Electrical Diagrams

The following pages contain detailed electrical wiring diagrams for the Rebel line. Pages 6, 7, and 8 illustrate typical configurations for smaller tonnage units (3 to 15 tons). Pages 9 through 13 are typical for larger tonnage units (16 to 28 tons). These diagrams show various component connections, circuit layouts, and terminal designations for different unit configurations.

Diagram Description (Figure 1): Typical CAV_VAV 277–460 VAC Wiring (1 of 3) for DPS 003-006, detailing power supply, motor controls, and various terminal connections.

Diagram Description (Figure 2): Typical CAV_VAV 277–460 VAC Wiring (2 of 3) for DPS 003-006, showing connections for smoke detectors, sensors (DAT, Humidity, LCT, OAT), and control panel interfaces.

Diagram Description (Figure 3): Typical CAV_VAV 277–460 VAC Wiring (3 of 3) for DPS 003-006, illustrating connections for heating components, economizer, and fan controls.

Diagram Description (Figure 4): Typical wiring for Larger Tonnage Units (16 to 28 Tons), showing VFD connections, motor controls, and sensor interfaces.

Diagram Description (Figure 5): Typical wiring for Larger Tonnage Units (16 to 28 Tons), detailing various control and sensor connections.

Diagram Description (Figure 6): Typical wiring for Larger Tonnage Units (16 to 28 Tons), showing control module connections and safety interlocks.

Diagram Description (Figure 7): Typical wiring for Larger Tonnage Units (16 to 28 Tons), illustrating communication ports and sensor inputs.

Diagram Description (Figure 8): Typical wiring for Larger Tonnage Units (16 to 28 Tons), focusing on gas furnace electrical schematics and modulating control.

Support and Additional Information

Daikin Applied Training and Development: For training on Daikin Applied HVAC products, visit www.DaikinApplied.com and click on Training, or call 540-248-9646 to reach the Training Department.

Warranty: Daikin Applied equipment is sold under standard terms and conditions, including Limited Product Warranty. Consult your local Daikin Applied Representative for warranty details. Find representatives at www.DaikinApplied.com.

Aftermarket Services: To locate parts offices, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787). To find service offices, visit www.DaikinApplied.com or call 800-432-1342.

This document reflects the most current product information at the time of printing. For the latest updates, please visit www.DaikinApplied.com.

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OM 1164-3 (07/23) ©2023 Daikin Applied | (800) 432-1342 | www.DaikinApplied.com