Variable refrigerant volume (vrv) hvac system


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Daikin HVAC Controls Guide Specification

VARIABLE REFRIGERANT VOLUME (VRV) HVAC SYSTEM

REMOTE CONTROLS
Part 1 - General


    1. Physical characteristics




  1. General:

The local remote control shall be made from plastic materials with a neutral color. Each control shall have a LCD (Liquid Crystal Display) that shows set point, room temperature, mode of operation (on/off/cool/heat), and fan speed.
1.02. Electrical characteristics
A. General:

The each indoor unit control circuit board shall supply 16 volts DC to the local remote controller. The voltage may rise or fall in relation to the transmission packets that are sent and received.
B. Wiring:

The control wiring shall be terminated in a daisy chain design from outdoor unit, to branch selector, then daisy chaining to each indoor unit in the system and terminating at the farthest indoor unit. The remote control wiring shall run from the indoor unit control board terminal block to the remote controller connected with that indoor unit.
C. Wiring size:

Wiring shall be non-shielded, 2-conductor sheathed vinyl cord or cable, and 18 AWG stranded copper wire.
1.03. VRV Controls Network

The VRV Controls Network is made up of local remote controllers, multi-zone controllers, advanced multi-zone controllers, and open protocol software devices that transmit information via the high-speed communication bus and can also be controlled via a network PC. The VRV Controls Network supports operation monitoring, scheduling, error e-mail distribution, general user software, tenant billing, maintenance support, and integration with Building Management Systems (BMS) using open protocol via BACnet® or Lonworks® interfaces; all of which blend to provide the optimal control strategy for the best HVAC comfort solution.
Part 2 - Products
2.01. Local Remote Controllers

Daikin AC VRV local remote controllers are compatible with all VRV indoor units. The remote controller wiring consist of a non-polar two-wire connection to the indoor unit. The local remote controllers may be wall-mounted and can be adjusted to maintain the optimal operation of the connected indoor unit(s). Set temperatures can be adjusted in increments of 1°F. In the cases where a system or unit error may occur, the VRV controllers will display a two-digit error code and the unit address. The local remote controllers do not require addressing.


  1. BRC1E72: New Navigation (NAV) Remote Controller

The NAV Remote Controller can provide control for all VRV indoor units. The remote controller wiring consist of a non-polar two-wire connection to the indoor unit at terminals P1/P2. The NAV Remote Controller is wall mounted and can be adjusted to maintain the optimal operation of the connected indoor unit(s). The NAV Remote Controller does not require addressing.
The NAV Remote Controller can be used in conjunction with the BRC2A71 (Simplified Remote Controller) or another NAV Remote Controller to control the same indoor unit group. No more than 2 remote controllers can be placed in the same group.
1. Mounting:

The NAV Remote Controller shall be mounted into a standard

2” x 4” junction box.
2. Display Features:

  • The NAV Remote Controller shall be approximately 4.75” x 4.75” in size with a backlit 2.75” x 1.75” LCD display.

  • Feature Backlit LCD Display with contrast adjustment and auto off after 30 seconds.

  • Display information shall be selectable from English, French, or Spanish.

  • Configurable display mode – Detailed, Standard, and Simple

    • Large 11/16” room temperature displayed in Simple display

  • The controller shall display Operation Mode, Setpoint, and Fan Speed.

    • Displayed items configurable

    • Configure “Off” to be displayed when unit is turned off (field setting required)

      • Prevents mode adjustment

    • Setpoint can be removed from display when unit is turned Off (field setting required)

      • Prevents setpoint adjustment

    • Fan speed display removable (field setting required)

      • Prevents fan speed adjustment

  • System Status icons.

  • The controller shall display temperature setpoint in one degree increments with a range of 60-90oF (16-32oC)

  • Detailed and Simple display will reflect room temperature (0-176oF/-18-80oC range in one degree increment).

    • Display of temperature information shall be configurable for Fahrenheit or Celsius

  • On/Off status shall be displayed with an LED.

  • Error codes will be displayed in the event of system abnormality/error with a two digit code.

    • A blinking LED will also signal system abnormality/error

  • The following system temperatures can be displayed to assist service personnel in troubleshooting:

    • Return Air Temperature

    • Liquid Line Temperature

    • Gas Line Temperature

    • Discharge Air Temperature (depending on unit),

    • Remote Controller Sensor Temperature

    • Temperature used for Indoor Unit Control


3. Basic Operation:

  • Capable of controlling a group of up to 16 indoor units.

  • Controller shall control the following group operations:

    • On/Off, Operation Mode (Cool, Heat, Fan, Dry and Auto* (*with VRV Heat Recovery & Heat Pump Systems))

      • Configure only the essential modes to be selectable – remove unnecessary mode selection(s) from display

    • Independent Cooling and Heating setpoints in the occupied mode

      • Dual setpoints (individual Cool and Heat setpoints with minimum setpoint differential 0 – 8oF (0 – 4oC) default 2oF (1oC)) or Single setpoint

    • Independent Cooling Setup and Heating Setback setpoints in the unoccupied mode

    • Fan Speed

    • Airflow direction (dependent on indoor unit type).

    • The controller shall be able to limit the user adjustable setpoint ranges individually for cooling and heating in the occupied period

    • Function button lockout (On/Off, Mode, Fan Speed, Up/Down, Left, Right Arrows)

    • Optional Controller Face Decal (BRC1E72RM, BRC1E72RF, BRC1E72RMF, BRC1E72RM2, BRC1E72RF2, BRC1E72RMF2 ) to hide unnecessary (locked out) buttons

    • Indoor Unit group assignment

    • Clock (12/24 hour) and Day display

    • Automatic adjustment for Day Light Savings Time (DST)

      • Set changeover period (second Sunday in March / first Sunday in November)


4. Programmability:

  • Controller shall support schedule settings with selectable weekly pattern options.

    • 7-day

    • Weekday + Weekend

    • Weekday + Saturday + Sunday

    • Everyday

    • The schedule shall support unit On/Off

    • Independently settable Cooling and/or Heating setpoints when unit is on (occupied)

    • Setup (Cooling) and Setback (Heating) setpoints when unit is off (unoccupied)

    • A maximum of 5 operations can be schedulable per day

    • Time setting in 1-minute increments

  • The Controller shall support auto-changeover mode for both Heat Pump and Heat Recovery systems allowing the optimal room temperature to be maintained by automatically switching the indoor unit’s mode between Cool and Heat according to the room temperature and temperature setpoint.

    • Changeover to cooling mode shall occur at cooling setpoint + 1oF (0.5oC) as the primary changeover deadband

      • Configurable from 1 – 4oF (0.5 – 2oC) with field setting

    • Changeover to heating mode shall occur at heating setpoint - 1oF (0.5oC) as the primary changeover deadband

      • Configurable from 1 – 4oF (0.5 – 2oC) with field setting

    • 1 hour guard timer

  • Upon changeover, guard timer will prevent another changeover during this period.

      • Guard timer is ignored by a change of setpoint manually from either the Multi-zone Controller, Remote Controller, or by schedule.

      • The Guard timer is also ignored if the space temperature reaches the secondary changeover deadband (configurable from 1 - 4oF (0.5 – 2oC)) from the primary changeover deadband, and the guard timer has been activated

      • 60 minutes as default, configurable to 15, 30, or 90 minutes

  • The Controller shall support an Auto Off Timer for temporarily enabling indoor unit operation during the unoccupied period.

    • When the Off Timer is enabled and when the unit is manually turned on at the remote controller

    • The controller shall shut off the unit after a set time period

    • The time period shall be configurable in the controller menu with a range of 30-180 minutes in 10 minute increments

  • The room temperature shall be capable of being sensed at either the NAV Remote Controller, the Indoor Unit return air temperature sensor (default), or Remote Temperature Sensor (KRCS01-1B) configured through the field settings.




  1. BRC1E71: Navigation (NAV) Remote Controller

The NAV Remote Controller can provide control for all VRV indoor units. The remote controller wiring consist of a non-polar two-wire connection to the indoor unit at terminals P1/P2. The NAV Remote Controller is wall mounted and can be adjusted to maintain the optimal operation of the connected indoor unit(s). The NAV Remote Controller does not require addressing.
The NAV Remote Controller can be used in conjunction with the BRC2A71 (Simplified Remote Controller) or another NAV Remote Controller to control the same indoor unit group. No more than 2 remote controllers can be placed in the same group.
1. Mounting:

The NAV Remote Controller shall be mounted into a standard

2” x 4” junction box.
2. Display Features:

  • The NAV Remote Controller shall be approximately 4.75” x 4.75” in size with a backlit 2.75” x 1.75” LCD display.

  • Display information shall be selectable from English, French, or Spanish.

  • Feature Backlit LCD Display with contrast adjustment and auto off after 30 seconds.

  • The controller shall display Operation Mode, Setpoint, and Fan Speed.

  • System Status icons.

  • The controller shall display temperature setpoint in one degree increments with a range of 60-90oF (16-32oC)

  • Detailed display will reflect room temperature (0-176oF/-18-80oC range in one degree increment).

    • Display of temperature information shall be configurable for Fahrenheit or Celsius

  • On/Off status shall be displayed with an LED.

  • Error codes will be displayed in the event of system abnormality/error with a two digit code.

    • A blinking LED will also signal system abnormality/error

  • The following system temperatures can be displayed to assist service personnel in troubleshooting:

    • Return Air Temperature

    • Liquid Line Temperature

    • Gas Line Temperature

    • Discharge Air Temperature (depending on unit),

    • Remote Controller Sensor Temperature

    • Temperature used for Indoor Unit Control


3. Basic Operation:

  • Capable of controlling a group of up to 16 indoor units.

  • Controller shall control the following group operations:

    • On/Off, Operation Mode (Cool, Heat, Fan, Dry and Auto* (*with VRV Heat Recovery & Heat Pump Systems))

    • Independent Cooling and Heating setpoints in the occupied mode

    • Independent Cooling Setup and Heating Setback setpoints in the unoccupied mode

    • Fan Speed

    • Airflow direction (dependent on indoor unit type).

    • The controller shall be able to limit the user adjustable setpoint ranges individually for cooling and heating in the occupied period

    • Lock out key settings

    • Indoor unit group assignment

    • Clock (12/24 hour) and Day display


4. Programmability:

  • Controller shall support schedule settings with selectable weekly pattern options.

    • 7-day

    • Weekday + Weekend

    • Weekday + Saturday + Sunday

    • The schedule shall support unit On/Off

    • Independently settable Cooling and/or Heating setpoints when unit is on (occupied)

    • Setup (Cooling) and Setback (Heating) setpoints when unit is off (unoccupied)

    • A maximum of 5 operations can be schedulable per day

    • Time setting in 1-minute increments

  • The Controller shall support auto-changeover mode for both heat pump and heat recovery systems allowing the optimal room temperature to be maintained by automatically switching the indoor unit’s mode between Cool and Heat according to the room temperature and temperature setpoint.

    • Changeover to cooling mode shall occur at cooling setpoint + 1oF (0.5oC)

    • Changeover to heating mode shall occur at heating setpoint - 1oF (0.5oC)

  • The Controller shall support an Auto Off Timer for temporarily enabling indoor unit operation during the unoccupied period.

    • When the Off Timer is enabled and when the unit is manually turned on at the remote controller

    • The controller shall shut off the unit after a set time period

    • The time period shall be configurable in the controller menu with a range of 30-180 minutes in 10 minute increments

  • The room temperature shall be capable of being sensed at either the NAV Remote Controller, the Indoor Unit return air temperature sensor (default), or Remote Temperature Sensor (KRCS01-1B) configured through the field settings.



  1. BRC2A71: Simplified Remote Controller

The Simplified Remote Controller can provide control for all VRV indoor units. The remote controller wiring consists of a non-polar two-wire connection to the indoor unit at terminals P1/P2. The Simplified Remote Controller is wall mounted and can be adjusted to maintain the optimal operation of the connected indoor unit(s). The Simplified Remote Controller does not require addressing.
The Simplified Remote Controller can be used in conjunction with the BRC1E71 (Navigation Remote Controller) or another Simplified Remote Controller to control the same indoor unit group. No more than 2 remote controllers can be placed in the same group.
1. Mounting:

The Simplified Remote Controller shall be mounted into a standard

2” x 2” junction box.
2. Display Features:

  • The Simplified Remote Controller shall be approximately 4.75” x 2.75” in size with a 1” x 1.75” LCD display.

  • The controller shall display Operation Mode, Setpoint, and Fan Speed.

  • The controller shall be able to display temperature setpoint in one degree increments with a range of 60-90oF (16-32oC).

  • On/Off status shall be displayed with an LED.

  • Error codes will be displayed in the event of system abnormality/error with a two digit code.

    • A blinking LED will also signal system abnormality/error


3. Basic Operation:

  • Capable of controlling a group of up to 16 indoor units.

  • Controller shall control the following group operations:

    • On/Off, Operation Mode (Cool, Heat, Fan, Dry and Auto* (*with VRV Heat Recovery System))

    • Independent Cooling and Heating setpoints in the Occupied mode

    • Independent Cooling Setup and Heating Setback setpoints in the Unoccupied mode,

    • Set fan speed

    • The controller shall be able to limit the user adjustable setpoint ranges individually for cooling and heating in the occupied period

    • Indoor unit group assignment

    • Function key lockout (Mode / Fan Speed) via Optional Controller Face Plates (BRC2A71RU / BRC2A71R)




  1. BRC4C82 / BRC7E83 / C812 / E818: Wireless Remote Controller

The Wireless Remote Controller can provide control for all VRV indoor units. The remote controller wiring consists of a non-polar two-wire connection to the indoor unit at terminals P1/P2. The Wireless Remote Controller is wall mounted and can be adjusted to maintain the optimal operation of the connected indoor unit(s). The Wireless Remote Controller does not require addressing.
The Wireless Remote Controller can be used in conjunction with the BRC2A71 (Simplified Remote Controller) or another Wireless Remote Controller to control the same indoor unit group. No more than 2 remote controllers can be placed in the same group.
1. Mounting:

The Wireless Remote Controller receiver shall be mounted on the wall or on the indoor unit (dependent on indoor unit model type).
2. Display Features:

  • The Wireless Remote Controller shall be approximately 6.25” x 2.75” in size with a 3.75” x 0.75” LCD display.

  • The controller shall be able to display Operation Mode, Setpoint and Fan Speed.

  • The controller shall be able to display temperature setpoint in one degree increments with a range of 60-90oF (16-32oC).

  • Error codes will be displayed in the event of system abnormality/error with a two digit code.

    • A blinking LED will also signal system abnormality/error


3. Basic Operation:

  • Capable of controlling a group of up to 16 indoor units.

  • Controller shall control the following group operations:

    • On/Off, Operation Mode (Cool, Heat, Fan, Dry and Auto* (*with VRV Heat Recovery System))

    • Independent Cooling and Heating Setpoints in the occupied mode

    • Fan Speed

    • Air flow direction (dependent on indoor unit type)

    • Indoor unit group assignment


4. Programmability:

  • Supports timer controlled start/stop operation (up to 72 hours).


D. KRCS01-1B: Remote Temperature Sensor

The Remote Temperature Sensor can provide temperature sensing for all VRV indoor units. The remote controller wiring consists of a non-polar two-wire connection to the indoor unit at terminals X13A. The Remote Temperature Sensor is wall mounted and is used to maintain the optimal operation of the connected indoor unit.
The Remote Temperature Sensor can be used in conjunction with the Navigation Remote Controller, Simplified Remote Controller, and the Wireless Remote Controller to sense space temperature outside of the indoor unit. No more than 2 remote controllers can be placed in the same group.
1. Mounting:

  • Sensor Box shall be 2.38” x 1.97” x 0.75” (H x W x D) in size.

  • Can be mounted on the wall in the provided sensor box.

  • Can be mounted in the Simplified Remote Controller (BRC2A71).

  • Can be mounted a button temperature sensor holder (field supplied).


2. Application:

The location of the temperature sensor should provide a realistic sample of the space temperature in order to provide the optimum comfort level to the occupants.

  • Things that need to be considered are:

    • Indoor unit location

    • Will outside area be brought into the space and/or indoor unit

    • Ceiling heights

    • Control Scheme

    • Design and limitations due to architecture

    • Plenum air return


3. Basic Operation:

  • Replaces indoor unit return air temperature sensor.

    • Senses room temperature for only one indoor unit





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