ApenGroup Aermax Series, Use, Installation And Maintenance Manual

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29 code HC0100.00GB ed.A-1509
HY
AQUAPUMP HYBRID
HYBRID HEATER
3.7. Temperature adjustment logic
AQUAPUMP HYBRID allows operation with the following
conditions:
• Heat Pump only/Chiller
• Heat Pump + Condensing boiler
• Condensing Boiler only.
The modulation of the operating power of both technologies
is adjusted to keep the delivery temperature of both systems
fixed, each system works with a dedicated adjustment ramp
and different delivery setpoints according to the operating mode
selected (see par. 4.1.).
The parameters that can be set on the SmartWEB/EASY remote
control for the adjustment of the different operating modes are
the following:
• ST = Device setpoint. IT IS the setpoint to be checked
to distinguish the heating/cooling demand request of the
device. As the case may be, it can be the ambient air
temperature or the water temperature of a tank (T
REF
) or even
the domestic hot water temperature (T
DOM
) when configured.
• T_EXT_REF = External temperature setpoint (for winter
operation only). When the external temperature drops
below this value the heat pump is turned off. This setpoint
has a fixed ON/OFF differential value of ±1°C.
• Xd = ON/OFF differential for ST
• Xd2 = Differential (for winter operation only) to distinguish
the limit T below which the boiler must be activated as well.
WINTER SETUP
The equipment operation during the heating phase requires that
with standard use conditions (when the external temperature is
greater than the settable limit T
EXT_REF
) the heat pump is always
activated with operation priority over the condensing boiler, the
boiler is activated and deactivated according to the distance
from the reference temperature setpoint.
The adjustment logic with decreasing T
DEV
and increasing T
DEV
is described in the graphs below:
SUMMER SETUP
The operation during the summer for production of chilled water
is very easy; in this case T
EXT_REF
and Xd2 are not involved and
a simple ON/OFF setting of the HP with "chiller" operation in the
T
DEV
control is required, as described in the following graphs.
2
ST
ST - Xd
ST - Xd2
T
DEV
T
EXT
T
EXT_REF
OFF
HP
ONL
Y
BOILER
ONL
Y
BOILER
+
HP
Winter setup with decreasing T
DEV
temperature
2
ST
ST + Xd
ST - Xd2
T
EXT
T
EXT_REF
BOILER
ONL
Y
HP ONLY
OFF
BOILER
+
HP
Winter setup with increasing T
DEV
temperature
T
DEV
4
ST
ST+Xd
CHILLER
ON
OFF
T
EXT
Summer setup with increasing T
DEV
temperature
T
DEV
4
OFF
CHILLER
ON
T
EXT
ST
ST-Xd
Summer setup with decreasing T
DEV
temperature
T
DEV