P-Net Controls

Panasonic share the same flexible controls systems between their two types of VRF system and PACi commercial split systems. This gives a massively flexible range of options.

The main different options are shown below


The most common controller is the standard CZ-RTC2 which is low cost, massively flexible and has a 7 day time clock, built in temperature sensor and a huge amount of service options. One controller can control up to 8 indoor units and you can have up to two controllers per indoor unit. When you control multiple indoor units from one controller this is called a Group.

Another popular option is the CZ-RE2C2 simple hotel wired controller. This is very easy to use and designed for hotel bedrooms but it still offers many of the same 'engineer' facilities as the standard wired remote. This has its own temperature sensor as well but no time clock.

A new option is a Wi-Fi controller that connects your PACi indoor unit to the internet and allows you to control it from a smartphone, tablet or PC. Or even from your TV using a web browser. This is used in conjunction with a standard wired controller. One controller is needed per indoor unit.

A brand new option is the touch panel CZ-RTC3 controller which looks great, has a blue backlit display and we believe it has greater functionality than the older RTC2 model described above. This has only just been released and is not backwards compatible with older systems and can only work with the very latest generation systems. But we will keep you posted as we get more experience with it. It also contains a power consumption monitor that is only used with PACi systems to help end users control their energy bills.

A big bonus is the ability of this controller to work with a separate Econavi sensor. This technology has been used for some years on the Etherea advanced RAC system and measures room occupancy and activity levels in order to modify the operation of the system. This has the potential to save a considerable amount of money and energy as the unit ramps down when there is low occupancy and low activity, only to ramp up again if either increase. It also can switch the unit off if the room is unoccupied for some time which will be a boon in offices and schools.

Another new controller is the new hotel controller. This is designed to be easier than ever to operate and promises a host of advanced features. We will let you know more as we get more experience with it.

As we understand it at this stage the controller has either stand alone, Modbus or LonWorks options and is available in either white or brushed aluminium. It not only controls the air conditioner but it also controls the lighting from the key card switch and is compatible with an Econavi motion sensor and optional window switch.

All systems have the facility to be controlled by a wireless handset. Wall and compact cassette systems have a receiver built into them while the other cassettes and ceiling systems can have a sensor fitted to the grille or casing. All other models can be fitted with a remote receiver PCB . For servicing purposes we do suggest that you consider fitting a slave CZ-RTC2 wired controller or at very least keep one loose on site for an engineer to use when carrying out service or maintenance work or trouble shooting.

The simplest central control interface is the CZ-ANC2 which can give ON / OFF control and status display for up to 16 groups (up to 64 indoor units). This is useful for untrained staff to use.

Two controllers often seen together are the CZ-64ESMC2 central controller and the CZ-64ESWC2 schedule timer. The central controller can control up to 64 groups from a central location, while the schedule timer adds a time clock facility.

The CZ-256ESMC2 is a really sophisticated device with a touch screen interface and the ability to offer control of up to 256 indoor units and a remote intranet web PC interface.

We also have various control adaptors and the sophisticated PAIMS control software to give remote PC system control and multiple BMS control options. Speak to us about which one is right for you.

Terminal CN015 on all indoor PCBs has a really useful function because this allows a T10 plug to be connected. The T10 allows remote on / off and remote controller lockout inputs and gives 12V dc outputs for run and trip. These have lots of potential uses.

CN032 is another useful plug on the PCB because this gives a 12V dc output when the ventilation function is selected on the controller. This can feed a 12V dc relay to switch an external fan on and off.

CN060 is another useful one, particularly when used with the T10 interface. This gives 12V dc outputs for fan on, cooling mode selected, heating mode selected, cooling or heating mode activated,  and defrost activated. You can see that this has lots of potential uses.

A final really useful plug is CN009 which can be used for forced off control.

All of these PCB  functions are standard and just need plugs to connect them.

We finally have some other useful interfaces as shown below