Energy-Efficient Use Of The Heat Pump; Purpose Of The Heat Pump; Application; Operating Principle - Dimplex SI 22TU Instructions D'installation Et D'utilisation

SI 22TU
1.4 Energy-Efficient Use of the Heat
Pump
By operating this heat pump you are helping to protect our en-
vironment. Both the heating system and the heat source must
be properly designed and dimensioned to ensure efficient op-
eration. It is particularly important to keep water flow tempera-
tures as low as possible. All connected energy consumers
should therefore be suitable for low flow temperatures. Raising
the heating water temperature by 1 K corresponds to an in-
crease in energy consumption of approx. 2.5 %. Low-tempera-
ture heating systems with flow temperatures between 30 °C
and 50 °C are particularly well-suited for energy-efficient oper-
ation.
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Purpose of the Heat Pump

2.1 Application

The brine-to-water heat pump is to be used exclusively for the
heating of heating water. It can be used in new or previously ex-
isting heating systems. A mixture of water and antfreeze (brine)
is used as the heat transfer medium in the heat source system.
Borehole heat exchangers, ground heat colletors or similar sys-
tems can be used as the heat source system.

2.2 Operating Principle

The heat generated by the sun, wind and rain is stored in the
ground. This heat stored in the ground is collected at a low tem-
perature by the brine circulating in the ground collector, ground
coil or similar device. A circulating pump then conveys the
"heated" brine to the evaporator of the heat pump. There the
heat is given off to the refrigerant in the refrigerating cycle. This
cools the brine so that it can once again absorb thermal energy
in the brine circuit.
The refrigerant is drawn in by the electrically driven compres-
sor, compressed and "pumped" to a higher temperature level.
The electrical power needed to run the compressor is not lost in
this process. Most of it is absorbed by the refrigerant.
Subsequently, the refrigerant is passed through the condenser
where it transfers its heat energy to the heating water. Depend-
ing on the set operating point (thermostat setting), the heating
water is thus heated up to a max. of 58 °C.
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3

Basic Device

The basic device consists of a heat pump for indoor installation
wired ready for use with metal casing, switch box and inte-
grated heat pump manager. The refrigeration circuit is "hermet-
ically sealed" and contains the fluorinated refrigerant R407C in-
cluded in the Kyoto protocol. Information on the GWP value
and CO equivalent of the refrigerant can be found in the chap-
2
ter Device information. The refrigerant is CFC-free, non-ozone
depleting and non-combustible.
All components required for the operation of the heat pump are
located on the control panel. An external wall temperature sen-
sor including fixing accessories and a dirt trap are supplied with
the heat pump. The supply for the load current and the control
voltage must be installed by the customer.
The supply lead of the brine circulating pump (to be provided
by the customer) must be connected to the control panel. If re-
quired, the supply lead of the brine pump is be equipped with a
motor protection device.
The customer must provide both the heat source system and
the brine circuit manifold.
1) Liquifier
2) Control panel
3) Evaporator
4) Compressor
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English
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