VRF Inverter Multi-System Air Conditioners

Our CHCC defrosting control has been added to our KXZ2 system and allows to achieve greater capacities than that of our previous model in low ambient temperature conditions. CHCC controls the target pressure automatically before the capacity drops, which increases the period of heating operation and reduces the systems defrosting time.

VTCC adjusts the target pressure of the refrigerant cycle in the outdoor unit automatically according to the demand of the indoor units in partial load conditions. These smooth adjust- ments ensure optimal usage of the indoor units as well as maximised energy savings. Ultimately this also increases comfort for the user.

With limitation to piping length and height difference between indoor and outdoor units.

The KXZ2 series has a layered design and a refined new form. The flexibility in design and ease of installation are further enhanced to provide optimum response to medium and large building air-conditioning systems.

Increased number of connectable units and max capacity connection

( *1 ) When connecting the indoor unit type FDK, FDFL, FDFU or FDFW series, limit the connectable capacity not higher than 130%.

Flexibility to meet installation location needs

The maximum height difference between indoor units is a maximum of 30m, and the maximum height difference between the outdoor unit and indoor unit is 90m.
For with few limitations, contributes to system design flexibility
*1 The difference between the longest and the shortest indoor unit
piping from the first branch must be within 40m. (MAX85m)
*2 It is necessary to change the setting corresponding to each
height difference in installation. The range of use is also defferent.

The heat recovery systems operate with 3 inter-connecting pipes, commonly referred to as a ‘3-pipe system’. The systems provide both heating and cooling operations simultaneously to individual indoor units according to room conditions or user requirements.

The systems incorporate highly sophisticated controls transferring heat load energy from the entire building to provide an efficient, comfortable heating and cooling environment.

The range starts from a cooling capacity of 8 HP (22.4 kW) and expands up to 24 HP (67.0kW) using a single outdoor unit. Outdoor units can also be used as a modular system (twin or triple) providing up to 60 HP (168.0 kW) of cooling capacity.

The system interconnecting pipework has a unique arrangement, with two of the interconnecting pipes routed through a PFD Distribution Controller, and the third pipe connected directly to each indoor unit from the main pipe run. This reduces installation time, and the number of brazed connections on site. The PFD Distribution Controllers are available for single connection, or as a combined PFD 4-way connection, with each connected unit having independent cooling or heating operation.

During defrosting or during automatic protection of a compressor, which is activated every several hours in heating operation, heating operation temporarily stops and restarts after some period. The series has the same automatic protection of compressor in cooling operation also. During this protection period air flow only comes on and cooling
operation restarts after some period.
These models are not suitable for year round cooling applications -such as server rooms- especially in areas where the outdoor air temperature goes below 5°C.

Highly efficient operation mode is automatically determined inside the refrigerant system during simultaneous cooling and heating operation. Heat recovery efficiency is maximized by this control and Max COP 9.0 (*) is achieved during operation with simultaneous cooling and heating.

* Conditions for simultaneous cooling and heating (Our estimation in 8HP operation and the following conditions: Temperature outside the room
DB16°C/WB12°C, temperature in the cooled room
DB27°C/19°C, and temperature in the heated room
DB20°C/WB14.5°C)

Space saving for small offices, shops applications

Compact high efficient
Heat Exchanger

• Optimizing relationship of the air flow velocity &  finpattern
• Improvement of air distribution Maximizing efficiency of heat exchanger

Optimum Refrigerant System Control

• Optimum heat exchanger refrigerant distribution
• Advanced refrigerant liquid return protection control system
• High speed system control by Superlink system

1. DC Fan motor Compact & High efficiency

2. Inverter Control Compact & Vector Inverter Control system

3. Downsized accumulator

4. Receiver in fan section

5. Scroll Compressor

A corner-mounted motion sensors detects human presence and activity in a room, enhancing comfort.

A Sensor to optimize the air fow

Direct flow control

The louvers are controlled to blow towards human position.

Draft less control

Draft prevention panel is activated based on human position.

Power consumption decreased by:

1.Adopting new designed impeller and flow path

improves the aerodynamic performance of the unit.
2. Φ5.0 heat exchanger tube is adopted to improve the performance
Slimmer heat exchanger and a dense copper piping.

*R32 indoor unit are not compatible with
R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with
R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with
R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with
R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with
R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with R410A outdoor unit
and vice versa.

*R32 indoor unit are not compatible with R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with R410A outdoor unit and vice versa.

*R32 indoor unit are not compatible with
R410A outdoor unit and vice versa.

The EPBD function limits electrical/gas power to provide heating or cooling to commercial buildings. To use this function, the building designer needs to select energy efficient heating/cooling equipment and to minimise energy losses through ventilation systems.
SAF smart technology recovers heat energy in the atmosphere which would have otherwise been lost. It then uses this energy to warm air entering the building.
The reverse happens in warmer climates where the exhausted cool air is used to partially cool the incoming air.

Helping you to reduce energy consumption and carbon emissions by
capturing waste energy. EFBD also allows for smaller sized units as less
heating/cooling requirements are needed!

The following functions are newly available.
・ON/OFF Timer – The hour and minute of timer on/off can be set.
・Filter Sign – Announces the due time for cleaning the air filter.

• • SAF-DX is a heating or cooling coil incorporating KXZ series controls. It can be used in combination with our total heat exchanger. (SAF series)
  • Combination of SAF-DX with other indoor units is possible. The capacity code index of each model is shown below and must be used when making the system selection. Total capacity code index must be within 100% of outdoor unit capacity code index.
  • Remote control option is the same as other indoor units (see above). Connection to all Superlink controls is also possible.
  • Optional condensate lift mechanism is also available (600mm height).
  • Return air temp. control or supply air temp. control can be selected

• EEV-KIT is the control kit for operating the locally provided AHU
  or FCU with direct expansion heat exchanger coils in connection
  with the KXZ system.
  (AHU : Air Handling Unit, FCU : Fan Coil Unit)
  • EEV-KIT is composed of one EEV-Control ASSY and one EEV-Set.