User`s manual

40
Total downstream indoor unit capacity
less than 11.2kW
less than 18.0kW
less than 28.0kW
less than 44.8kW(11.2kWx4)
90 56 36 56
28 90
36 90
Branch control
PFD1123-E
PFD1803-E
PFD2803-E
PFD1123X4-E
4-Way PFD box
Relay kit
(Relay kit comes attached
to the branch control)
240v AC
relay kit
Power cable 240v AC
up to 40m
12v DC
up to 2m
PFD
Indoor
unit
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.
Groups of indoor units can be connected up to a total
capacity 44.8kW(11.2kWx4) 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
PFD1123X4-E which can connect up to four indoor
units with individual control - simultaneous cooling or
heating.
Easy installation
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.
PFD1123-E PFD1123-E PFD1123X4-E PFD1123-E
liquid pipe
discharge gas pipe
suction gas pipe
gas pipe
Outdoor
unit
Indoor
unit
PFD
controller
Branch control Total downstream capacity
Connectable indoor units
PFD1123-E less than 11.2kW 1-5
PFD1803-E less than 18.0kW 1-8
PFD2803-E less than 28.0kW 1-10
PFD1123X4-E less than 44.8kW(11.2kWx4) Up to 16
*
*Refer to Data Book for details
•
The remote control setting (as individual indoor unit on-off, temperature
setting other than cooling/heating mode control) is possible with one
remote control connected to each indoor unit, while at the same time,
Center Control (SC-SL1N/2NA/3N-E) can be used together with the
individual remote control.
•
It is necessary to set the central control to use this function. Please
refer to the Installation Manual for details.
•
In case of the mode changeover from cooling to heating and from cooling
to heating, by the use of only the indoor units and PFD box combination,
the mode changeover sound was reduced. All this made possible without
turning off the compressor and at the same time without the reduction of
capacity.
•
The risk of refrigerant leakage was reduced by changing piping connection
at the PFD box to brazing method.
•
By the use of optional PFD box
extension cable that has a connector
at ends, makes it possible to further
separate the indoor unit and PFD
box. This will enable the PFD box to
be located away from the indoor
unit and help reduce the influence of
sound caused by PFD box and
refrigerant flow.
PFD
PFD
KXR
Heating
Heating
Heating
Cooling
SC-SL1N/2NA/3N-E
central control
Same mode (Heating or Cooling)
Individual on-off, temperature setting
PFD refrigerant flow
branch control
PFD-15WR-E (option)
extension cable 15m