Panasonic Aquarea WH-SXC09H3E5 - Heat Pump; Functioning and Characteristics; Operating Mode

20 Aquarea air-to-water heat pumps - Planning and installation manual - 02/2022
Product Description
4
4.3 Heat pump
4.3.1 Functioning and Characteristics
Panasonic has developed the heat pump, as the core of the heat pump system, in three di󰀨erent
model series. This makes it possible to o󰀨er the best possible solution to address individual heat
supply requirements for buildings:
● Aquarea High Performance
Ideal for low-consumption houses with low-temperature radiators or underoor
heating.
● Aquarea T-CAP
For applications where the nominal heating capacity must be maintained even at
outside temperatures ranging from -7 or -20 °C. Care is taken to ensure that su󰀩cient
power output is always available for heating the house, even at extremely low outside
temperatures, even without support from an additional heat source.
● Aquarea HT
For houses with traditional high temperature radiators (e.g. in refurbishment projecs),
because Aquarea HT provides supply water temperatures up to 65 °C without any
support from other heating systems, even at outside temperatures of -15 °C.
For all series - except the HT series - a cooling function can be activated. Moreover, all Aquarea
heat pump series o󰀨er the choice of either a mono-bloc system (comprising just an outdoor unit), or
a bi-bloc system (comprising an outdoor unit and a hydrokit) (→ 4.5 Model types, p. 23).
4.3.2 Operating mode
In general: The greater the di󰀨erence between the outside temperature and temperature of the
useful heat, the lower is the COP of the heat pump. As high temperature di󰀨erences seldom occur
over the course of the year on properly planned heat pump systems, brief additional re-heating
using backup heaters is often accepted. As an alternative to backup heater, you can also work with
a peak load or alternative heat source, such as a condensing boiler or a replace. Four operating
modes are distinguished as follows:
● Monovalent operating mode:
The heat pump serves as the sole heat source.
● Mono-energetic operating mode:
One type of energy (electricity) is used in various heat sources (electric heat pump +
electric heating element for peak load).
● Bivalent alternative operating mode:
As an alternative to the heat pump, a second heat source supplies the object using
another type of energy (e.g. replace instead of heat pump for outside temperatures
< -5 °C).
● Bivalent parallel operating mode:
Besides the heat pump, a second heat source is used using another type of energy.
Both heat sources are operated simultaneously (e.g. heat pump + condensing boiler
for outside temperatures < 0 °C).
!
IMPORTANT
If the heat pump in combination with an electric backup heater is operated mono-energetically, the
backup heater should cover a maximum of 15 % of the heat requirement.