Panasonic PAW-HPM 1 User Manual page 24

In systems for heating and domestic hot water production with only one heat pump, as
well as in cascade systems in which HP1 is taking care of heating and DHW, the
function "Room thermostat" (terminals 9 and 12) must be used. In this case, the
heat pump can decide when the DHW tank should be loaded using its own domestic
hot water management (controlling the switch-over valve and calculating the needed
flow temperature).
The function "External control signal / remote switch" (terminals 17 and 18) is
always used when the heat pump is used only to produce heat for heating. In this case,
or if the heat pump is in a cascade system with other heat pumps (HP2 and HP3), the
heat pump is not responsible for loading a DHW tank.
In a system where the heat pump is controlled via contact, system diagrams that
include domestic hot water circuits cannot be loaded into the HPM controller since
the controller has no way to control loading of a DHW tank. As a result, it is not
possible to visualize the current temperature in the DHW tank or to change setpoints
for the DHW temperatures in the web graphic of the HPM controller.
Communication port
The full functionality of the HPM controller can only be used if the heat pump is
connected to the controller via the communication port. In this operating mode, the
HPM controller serves as a substitute for the operating unit in the heat pump. The
adapter cable has to be connected to the main PCB inside the heat pump instead of to
the operating unit. All basic configurations for initial startup of the heat pump must be
performed via the menu of the HPM controller.
During communication between the HPM controller and the heat pump, the HPM
controller transfers the calculated flow temperature setpoint to the heat pump. The
heat pump controls its own actuators (pump, compressor, fan, electric heating) to
provide the desired temperature at the heat pump's flow outlet.
If needed, the HPM switches the operating mode of the heat pump to "tank" (DHW
tank loading) and provides the desired flow temperature. The switch-over valve is
controlled by the heat pump.
Depending on the type of heat pump, it can also be switched to cooling operation. The
flow temperature setpoint and the criteria for switching to cooling operation can be
adjusted in the menu for the heating circuits in the HPM controller.
The following pictures display the connection of the operating unit on the main PCB
to which the adapter cable must be connected.
Fig. 2.18: Split: above - left - pos. of connection - MONO: middle - right
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