REMKO CMF-80 v.2 - Manual (Page 41)

General terms
Defrosting
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 pre-
determined 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.
Sealing test
System operators are obliged to
ensure the prevention of refriger-
ant 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 inspec-
tion 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 lower-
ing the condensing pressure on
the vapour tension. In addition,
the expansion valve regulates the
quantity of injected refrigerant in
relation to the evaporator load.
Sponsorship
The German Reconstruction Loan
Corporation supports ecologically
sound construction and modernisa-
tion of domestic buildings for pri-
vate 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 und www.bafa.de).
Limit temperature / balance
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 ob-
tained from the environment.
Inverter
Power regulator which serves to
match the speed of the compressor
motor and the speed of the evapo-
rator fans to the heating require-
ment.
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. This is not the same as
the coefficient of performance.The
seasonal performance factor cor-
responds to the reciprocal value 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. Cal-
culation of the annual power input
factor is undertaken according to
VDI – Directive 4650.
Refrigerating capacity
Heat flux extracted from the en-
vironment 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.
Compressor (condenser)
Unit designed for the mechanical
conveyance and compression of
gasses. Compression serves to sig-
nificantly increase the pressure and
temperature of the medium.
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