Dimplex LA16ASR - Manual (Page 4)

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valve as well as the low-noise compressor, a
desuperheater, a condenser and the electric control
unit.
In the case of low ambient temperatures, air humidity
may accumulate on the evaporator in the form of
frost impairing the heat transfer. The evaporator is
automatically defrosted by the heat pump, if required.
Cooling
In the "cooling" mode, the operating process of
evaporator and condenser is reversed
. .
The heating water transfers the heat to the refrigerant
via the condenser that is now working as the
evaporator. In the compressor the temperature of
the refrigerant is raised, and the heat is rejected to
the ambient air via the condenser (in the heating
mode the evaporator).
Via the additional heat exchanger, the waste heat
can also be used for hot water consumers such as
domestic hot water, swimming pool or bathroom
heating applications.
SCOPE OF DELIVERY
3.1 Baseline Unit
The heat pump is delivered as a compact unit
containing the components listed below.
The refrigerant used is R404A.
1 2
6 5 4 3
1) Evaporator 4) Pressostats
(heating mode) 5) Condenser
2) Fan (heating mode)
3) Control box 6) Compressor
PURPOSE OF HEAT PUMP
SCOPE OF DELIVERY
PURPOSE OF HEAT
PUMP
2.1 Application
The air-to-water heat pump is designed for use in
existing or newly built heating systems.
The heat pump is designed exclusively for the
heating and cooling of heating water!
In the heating mode, the heat pump is suitable both
for mono-energetic and bivalent operation at outdoor
air temperatures down to -20
o C.
In the continuous mode of operation, a heating water
return temperature of more than 18 °C must be
maintained in order to ensure proper defrosting of
the evaporator.
The heat pump is not designed for any increased
heat demand during the drying phase of new
buildings; the additional heat demand must be met
by special appliances to be supplied on site. For the
structural drying of new buildings in the autumn or
winter it is recommended that an additional electric
h e a t i n g e l e m e n t ( a v a i l a b l e a s a c c e s s o r y ) b e
installed.
In the cooling mode, the heat pump is suited for air
temperatures ranging from +15 °C ... +40 °C.
It can be used for passive and dynamic cooling
applications alike. The minimum water temperature
is +7 °C.
The unit is not suited for operation
with a frequency converter.
2.2 Principle of Operation
Heating
Ambient air is drawn in by the fan and passed over
the evaporator (heat exchanger). The evaporator
cools the air, i.e. it extracts the heat it contains. In
the evaporator, the heat removed is transferred to
the working fluid (refrigerant).
With the aid of an electrically driven compressor, the
absorbed heat is "pumped" to a higher temperature
level through pressure increase and given off to the
heating water via the
condenser (heat exchanger).
The desuperheater, mounted upstream, enables
domestic hot water to be produced simultaneously
or separately.
In so doing, electrical energy is used to raise the
heat of the environment to a higher temperature level.
Due to the fact that the energy extracted from the air
is transferred to the heating water, this type of
appliance is referred to a air-to-water heat pump.
The air-to-water heat pump consists of the following
main components: evaporator, fan and expansion
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3
CAUTION!