PFD refrigerant flow branch control allows you to remotely control your KXZ system in groups or individual units.
Groups of indoor units can be connected up to a total capacity 44.8kW to a single PFD with branch piping and all units in that group will operate in the same mode only (cooling or heating). We also have introduced the 4-way PFD control PFD1124X4-E which can connect up to four indoor units with individual control – simultaneous cooling or heating.
|Branch control||Total downstream indoor unit capacity|
|PFD1124-E||less than 11.2kW|
|PFD1804-E||less than 18.0kW|
|PFD2804-E||28.0kW or less|
|PFD1124X4-E||less than 44.8kW(less than 11.2kWx4 branches)|
New PFD design means the connection of the indoor unit liquid pipe is made directly to the liquid line – bypassing the PFD. This means (x2) less pipe connections per indoor unit, reducing installation time and cost.
The PFD is connected to the indoor unit by 3 core signal wire via a relay kit (supplied) to be located within 2m of each other. The indoor unit however can be up to 40m away. Power to the PFD can be connected from the indoor unit or other supply.