for air handling applications DX-Kit


Different control strategies for optimized control of air handling & fan coil units

When connecting to an air handling unit, the supply air temperature is controlled by the discharge sensor.

When connecting to a fan coil unit, the room temperature is controlled by the return air temperature sensor.

Arrangement as part of a VRF system

Supports a wide range of capacity classes

  • Connectable capacity range: 18,000 BTU/h to 168,000 BTU/h
  • 2 EEV units can be connected in parallel for up to 168,000 BTU/h large capacity units. (Separation Tube kit UTP-LX180A is required for 144,000 BTU/h / 168,000BTU/h.)

A variety of controls to match the application

Central control using VRF controllers or central management (BMS) controller

Central control from external controllers

Functions Summary


  • ON/OFF
  • Setting temperature
  • Capacity demand
  • Heating / Cooling operation mode
  • Fault information


  • ON/OFF indication
  • Fan ON/OFF indication
  • Thermo ON/OFF indication
  • Defrost indication
  • Fault indication

MODBUS® Control

Possible to control via Modbus interface for the integration into a BMS system.

Installation Limitation

  • Connectable VRF series: J-IIIL, J-IIS, J-II, V-II, VR-II
  • Connectable DX-Kit system capacity range: 50 to 100% of the outdoor unit capacity
  • Connectable DX-Kit system capacity range with indoor units: 30% or less of the outdoor unit capacity
  • Max wiring length from control unit: 32ft. (10m)
  • Max piping length between EEV unit and indoor unit: 16ft. (5m)
  • Outdoor installation: Control unit and EEV unit can be installed at an outdoor space.

For 2EEV units connection (option) Separation Tube kit : UTP-LX180A

Connectable capacity
Piping and wiring length