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www.dimplex.de 452234.66.02 · FD 9311 EN3
English
SI 50TE - SI 130TE
1.4 Energy-Efficient Use of the
Heat Pump
By operating this heat pump you contribute to the protection of
our environment. A prerequisite for an efficient operation is the
proper design and sizing of the heating system and the heat
source system. In particular, it is important to keep water flow
temperatures as low as possible. All energy consumers con-
nected should therefore be suitable for low flow temperatures. A
1 K higher heating water temperature corresponds to an in-
crease in power consumption of approx. 2.5 %. Low-temperature
heating systems with flow temperatures between 30 °C and
50 °C are optimally suited for energy-efficient operation.
2 Purpose of the heat
pump
2.1 Application
The brine-to-water heat pump is to be used exclusively for the
heating and cooling of heating water. It can be used in new or
previously existing heating systems. The mixture of water and
frost protection (brine) acts as a heat transfer medium in the heat
source system. Ground probes, ground heat collectors or similar
systems can be used as heat source systems.
2.2 Principle of Operation
The heat generated by the sun, wind and rain is stored in the
ground. This heat stored in the ground is collected at low temper-
ature by the brine circulating in the ground collector, ground coil
or similar device.
A circulating pump then conveys the warmed brine to the evapo-
rator of the heat pump. There, the heat is given off to the refrig-
erant in the refrigeration cycle. When so doing, the brine cools so
that it can again take up heat energy in the brine circuit.
The refrigerant is drawn in by the electrically driven compressor,
is compressed and “pumped” to a higher temperature level. The
electrical power needed to run the compressor is not lost in this
process, but most of the generated heat is transferred to the re-
frigerant.
Subsequently, the refrigerant is passed through the condenser
where it transfers its heat energy to the heating water. Based on
the thermostat setting, the heating water is thus heated to up to
58 °C.
3 Basic device
The device consists of a heat pump for indoor installation wired
ready for use with metal casing, switch box and integrated heat
pump manager. The refrigerant circuit contains the Kyoto proto-
col approved refrigerant R404A with a GWP value of 3784. It is
CFC-free, does not deplete ozone and is non-flammable.
All components required for the operation of the heat pump are
located in the control box. A sensor for the externall temperature
including mounting hardware as well as a strainer are supplied
with the heat pump. The supply for the load current and the con-
trol voltage must be installed by the customer.
The control wire of the brine pump (to be provided by the cus-
tomer) is to be connected to the control box. When so doing, a
motor protecting device is to be installed, if required.
The customer must provide both the heat source system and the
brine circuit manifold.
1) Control
2) Evaporator
3) Condenser
4) Compressor
5) Transport securing devices
6) Filter drier
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