REMKO CMF 320 Duo - Manual (Page 57)

General terms
Defrost
At outdoor temperatures below
5°C it is possible that ice may form
on the evaporators of air/water
heat pumps. The removal of this
ice is referred to as defrosting and
is undertaken by supplying heat,
either regularly or as requirements
dictate. Air/water heat pumps with
circuit reversal are distinguished by
their requirements-based, quick and
energy-efficient defrosting system.
Bivalent mode
The heat pump provides the
entire heating energy down
to a predetermined outdoor
temperature (e.g. 0°C). If the
temperature drops below this value,
the heat pump switches off and the
secondary heating appliance takes
over the heating, e.g. a heating
boiler.
Seal inspection
System operators are obliged to
ensure the prevention of refrigerant
leakage in accordance with the
directive on substances that deplete
the ozone layer (EC 2037/2000)
and the Regulation on Certain
Fluorinated Greenhouse Gases
(EC 842/2006). In addition, a
minimum of one annual service
and inspection must be carried
out, as well as a sealing test
for refrigerating plants with a
refrigerant filling weight over 3 kg.
Energy supply company
switching
Certain energy supply companies
offer special tariffs for the operation
of heat pumps.
Expansion valve
Heat pump component for
lowering the condensing pressure
on the vapour tension. In addition,
the expansion valve regulates the
quantity of injected refrigerant in
relation to the evaporator load.
Support
The German Reconstruction
Loan Corporation supports
ecologically-sound construction
and modernisation of domestic
buildings for private individuals.
This includes heat pumps which
can be supported in the form of
loans. The German Federal Office
of Economics and Export Control
(BAFA) subsidises the installation of
effective heat pumps (please refer
to: www.kfw.de and www.bafa.de).
Limit temperature / bivalence
point
Outdoor temperature where the
secondary heating appliance cuts in
under bivalent operation.
Heating output
Flow of heat emitted from the
liquefier to the environment. The
heating output is the sum of the
electrical power consumed by
the condenser and the heat flux
obtained from the environment.
Inverter
power regulator which serves to
match the speed of the compressor
motor and the speed of the
evaporator fans to the heating
requirement.
Seasonal performance factor
The seasonal performance factor
relates to the ratio of heat content
delivered by the heat pump system
to the supplied electrical energy in
one year. It may not be compared
to the performance number.
The seasonal performance factor
expresses the reciprocal of the
annual power input factor.
Annual power input factor
The annual power input factor
indicates the power input (e.g.
electrical energy) required in
order to achieve a certain benefit
(e.g. heating energy). The annual
power input factor includes the
energy required for auxiliary
drives. Calculation of the annual
power input factor is undertaken
according to VDI – Directive 4650.
Refrigerating capacity
Heat flux extracted from the
environment by the evaporator (air,
water or soil).
Refrigerant
The working medium used in a
refrigerant plant, e.g. heat pump,
is referred to as the refrigerant.
The refrigerant is a liquid which
is used for thermal transfer in a
refrigeration plant and which is
able to absorb heat by changing
its state at low temperatures and
low pressures. A further change of
state at higher temperatures and
higher pressure serves to dissipate
this heat.
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