Panasonic PAW-HPM 1 User Manual

222.2.6 Connection with the heat pumpThe HPM controller is capable of controlling the Panasonic heat pump via a contact(demand) signal. Communication via contact signal only offers the possibility to senda demand for the heating circuits through the signal.Direct communication with the heat pump via a communications port provides thecontroller with the advantage of being able to send the current flow temperaturesetpoints for heating or cooling, as well as for domestic hot water. Cascade control ofup to 3 heat pumps via HPM controllers is also possible. An additional HPM(2)controller is needed for control of the second and third heat pump in a cascade.Activation via contactFig. 2.16: External connections at a Panasonic Aquarea heat pumpThe HPM controller can send a heat demand to the heat pump via an activation(release) signal. A heat demand will cause the contact to close. The heat pump thenprovides a flow temperature generated from its own internal heating curve (which isstored in the operating unit of the heat pump). The HPM controller cannot make anyadjustments to this flow temperature via the contact signal. In systems with domestichot water control, the loading process of the domestic hot water tank is not controlledby the HPM controller but by the internal control strategy of the heat pump.Depending on the desired system (heat production for domestic hot water + heating,or heating only), the activation signal of the HPM must be connected to the followingexternal connections of the heat pump:For heating and DHW: Function “Room thermostat” – Terminal 9 + 12For heating only: Function “External control signal/remote switch” – Terminal17+18Fig. 2.17: Heat pump activation via contact