Technical data

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The Greenstar Plus Hybrid Manager monitors the heat
pump, the condensing boiler and the FW200 weather
compensation controller. Subject to outside temperature,
heating water flow and return temperature and the primary
flow temperature set point, the Hybrid control manager
determines what proportion of the total energy demand
should be covered by the condensing boiler and the heat
pump respectively. This process optimises the efficiency of
the heating system.
The Greenstar Plus Hybrid Manager delivers the control
signal at the interface to the air to water heat pump. This
modulates the output of the heat pump subject to the
current heat demand.
Hydraulic separator
A hydraulic separator is integrated into the Greenstar Plus
Hybrid Manager and separates the condensing boiler and
heating circuits. Thus, the heating water, after flowing
through the Greenstar Plus Hybrid Manager, can be either
routed through the condensing boiler or returned into the
heating system.
High efficiency pump within the Greenstar Plus
Hybrid Manager
An integrated high efficiency low energy circulation pump
(LECP) provides the heating water circulation through the
Hybrid Manager. The hydraulic separator also enables the
high efficiency pump operation in the Hybrid Manager when
the pump inside the condensing boiler is not running.
The pump inside the condensing boiler and the high
efficiency pump in the Hybrid Manager run simultaneously
if the condensing boiler operates on its own or at the same
time as the air to water heat pump.
If only the air to water heat pump is in operation, then only
the high efficiency pump in the Hybrid Manager runs.
The heat exchange between the refrigerant (R410A) and the
heating water takes place inside the condenser.
The filter, which should be checked regularly, protects
the condenser inside the Hybrid Manager and the heating
system from contamination through small particles with a
diameter larger than 1mm.
Magnetic reed flow switch
A magnetic reed flow switch ensures that the external
unit operates only if the water flow rate is adequate for
the condenser.
Temperature sensors
Temperature sensors are located at the plate heat
exchanger inlet and outlet to protect the heating water from
excessively high temperatures during heating operation by
the heat pump and against freezing when the heat pump is
being defrosted. The heat transfer between the refrigerant
(R410A) and the outside air takes place inside the heat
exchanger of the external unit (evaporator).
Buffer tank
The 50l buffer tank provides two functions: Firstly, the
buffer tank ensures that there is always sufficient heat
energy within the heating system in order to support the
Heat Pump Defrost operation. Secondly, the buffer volume
prevents excessive heat pump cycling during low heat load
conditions. This optimises system efficiency and reduces
excessive wear on heat pump components.
Functional description of the
Greenstar Plus Hybrid Manager
Greenstar Plus Hybrid Manager