REMKO LWM 110, Operating And Installation Instructions, Page: 31 / 64

3 Unit description
Description
The LWM series is a monobloc heat pump in which
refrigeration components are installed in a hermeti-
cally sealed refrigeration circuit. In addition, a
highly efficient speed-controlled circulation pump
and an electric volume flow monitor are integrated.
Furthermore, an optional electric Smart-Serv auxil-
iary heater can be installed to realise monoener-
getic operation. The Smart-Serv can also be used
for screed drying, hygiene functions or emergency
heat-operation.
If the on-site pressure loss does not exceed the
maximum available, a heating buffer tank can be
dispensed with. If necessary, only a drinking water
storage tank and changeover valve should then be
installed.
A district heating pipe is recommended as the
water-bearing pipe from the heat pump into the
house. This can be supplied as an option. The
Smart-Control Touch controller is supplied in an
attractively designed housing for wall mounting or
as a built-in controller in an indoor unit with a
storage tank. The touch display can optionally be
installed in a double flush-mounted or double sur-
face-mounted box. With the Smart-Control Touch,
three heating cycles can be activated, two of which
act as a mixing cycle. Further functions such as
solar thermal, second heat generator as bivalent
system, cooling, external heating cycle pumps can
be controlled as standard. A combination with a PV
system to increase its own power requirement is
integrated as standard.
Function of the heat pump
A heat pump is a unit which makes use of a
working medium to absorb ambient heat under low
temperatures and transports this heat to a place
where it can be of use for heating purposes. Heat
pumps work according to the same principles as a
refrigerator. The difference is that heat, the “by-
product” of the refrigerator, is the goal of the heat
pump.
The main components of the cooling circuit consist
of an evaporator, a compressor, a condenser and
an expansion valve. In a finned evaporator, the
refrigerant evaporates both because of lower pres-
sure and because of lower heat-source tempera-
tures through absorption of energy from the envi-
ronment. In the compressor, the refrigerant is
brought to a higher pressure and temperature by
the application of electrical energy. Next, the hot
refrigerant gas reaches the condenser, a plate heat
exchanger. Here the heat gas condenses, transfer-
ring heat to the heating system. The liquefied
refrigerant then expands and cools in a flow regu-
lator, the expansion valve. Then the refrigerant
flows into the evaporator once more and the cycle
is complete.
Smart-Control Touch is used for regulation, and it
assures the independent operation of all safety
devices. The water circulation system consists of a
circulation pump, plate heat exchangers, dirt traps,
safety valve, a manometer, filling and drain valves,
a flow switch and a service water storage tank.
A 3-way changeover valve, overflow protection
valve, additional probes and storage systems are
available as accessories.
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3
4
2
Fig. 29: Functional diagram heating
1: Condensing
2: Liquefying
3: Decompression
4: Evaporation
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