REMKO CMF-80 v.2 - Manual (Page 42)

REMKO CMF / CMT
Coefficient of performance
The current ratio of thermal out-
put produced by the heat pump
to the consumed electrical power
is referred to as the coefficient of
performance, as measured under
standardised boundary conditions
according to EN 255 / EN 14511.
A coefficient of performance of 4
means that a usable thermal output
amounting to 4-times the electrical
power consumption is available.
Single energy source mode
The heat pump covers a large
proportion of the required heating
power. On a few days per year an
electrical heating coil supplements
the heat pump under extremely low
outdoor temperatures. Dimension-
ing of the heat pump for air/water
heat pumps is generally based on
a limit temperature (also known as
balance point) of approx. -5 °C.
Monovalent mode
In this mode, the heat pump is
the sole heating appliance in the
building all year round. Monovalent
mode is primarily used in combina-
tion with brine/water and water/
water heat pumps.
Storage tank
The installation of a hot-water stor-
age tank is generally recommended
in order to extend the running time
of the heat pump under low heat
requirements. A storage tank is
required for air/water heat pumps
in order to bridge off-periods.
Noise
Noise is transmitted in media such
as air or water. Essentially there are
two types of noise, airborne sound
and solid-borne sound. Airborne
sound is transmitted entirely via the
air. Solid-borne sound is transmit-
ted in solid materials or liquids and
is only partially radiated as airborne
sound. The audible range of sound
lies between 20 and 20,000 Hz.
Sound pressure level
The sound pressure level is a
comparable characteristic quantity
for the radiated acoustic output
of a machine, for example, a heat
pump. The noise emission level
at certain distances and acoustic
environments can be measured.
The standard is based on a sound
pressure level given as a nominal
noise level.
Split AC unit
Design where one part of the de-
vice is positioned outdoors and the
other inside the building. Both units
are connected to each other by a
refrigerant pipe.
Evaporator
Heat exchanger on a refrigerant
plant which uses the evaporation of
a working medium in order to ex-
tract heat from its environment at
low temperatures (e.g. the outdoor
air).
Liquefier
Heat exchanger on a refrigerant
plant which liquefies a working
medium in order to transmit heat
to its environment (e.g. the heating
system).
Regulations and guidelines
The erection, installation and com-
missioning of heat pumps has to
be undertaken by qualified special-
ist engineers. In doing so, various
standards and directives are to be
observed.
Heat requirement assessment
A precise dimensioning of the
system must be carried out for heat
pump systems in order to maximise
efficiency. Calculation of the heat
requirement is undertaken accord-
ing to national standards. However,
approximate requirements can be
determined based on the W/m²
tables multiplied by living space to
be heated. The result of this is the
overall heat requirement, which
includes the transmission heat re-
quirement and the infiltration heat
loss.
Heat pump system
A heat pump system consists of
a heat pump and a heat source
system. For brine and water/water
heat pumps, the heat source system
must be made available separately.
Heat source
Medium from which the heat pump
derives heat, in other words, soil,
air and water.
Heat carrier
Liquid or gas medium (e.g. water,
brine or air), in which heat is trans-
ported.
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