Rotex HPSU compact 508, Инструкция по эксплуатации

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2 x Product description
7 BA ROTEX HPSU compact 2 - 04/2011
2 Product description
2.1 Brief description
The air-water heat pump system uses the physical effect of heat from condensation and makes it possible as required to heat or
cool buildings. The Solar tank with integrated interior heat pump unit (ROTEX HPSU compact) is the primary component of the
highly-efficient heating- and cooling system for domestic applications.
The external heat pump unit (RRLQ) comprises the refrigerant compressor and the capacitor (this works during cooling) or
vaporiser (this works during heating), which capture the ambient air temperature. The external heat pump unit (RRLQ) is
connected to the internal heat pump unit (HPSU compact) in the building with a closed refrigerant circuit. Heat or cold are
transported between the external heat pump unit (RRLQ) and the internal heat pump unit (HPSU compact) by the circulating
refrigerant, which alternately assumes the aggregate states of liquid and gas.
The internal heat pump unit (HPSU compact) contains the control devices, the heat exchanger and integrated storage tank. In the
heat exchanger, the heat is transferred to the water flowing in the heating circuit or the water in the storage tank (heating/warm
water supply), or heat is extracted from the water (cooling).
The storage tank on the ROTEX HPSU compact is built in such a way to enable the heat pump system to be combined with a
ROTEX Solaris solar installation without needing an additional hot water tank.
When using the optional solar heating, the entire tank, depending on the amount of sunshine, can be heated up by the helical and
corrosion-resistant heat exchanger made of a stainless steel corrugated pipe (1.4404) which is fully immersed in the tank. The
stored heat is now used for hot water generation as well as for the heating support. The high total storage capacity also
temporarily allows periods when the sun does not shine to be bridged. The excellent heat insulation properties of the integrated
storage tank also ensure that heat losses are kept to a minimum. This allows efficient and economic water heating and also solar
support.
To enable even more efficient use of the ROTEX HPSU compact, it is also possible to operate it with an off-peak mains
connection. Information on the prerequisites and connection possibilities are described in the enclosed installation manual.
Mode of operation
In room heating operation the refrigerant compressed by the refrigerant compressor in the external heat pump unit (RRLQ)
condenses in the underfloor heating heatexchanger of the interior heat pump unit (HPSU compact). The underfloor heating
exchanger is supplied inside with colder tank water and receives here the heat generated through the liquification of the
refrigerant. The circulation pump provides a permanent flow of the water in the internal tank circuit.
The standby zone of the storage tank integrated in the interior heat pump unit (HPSU compact) is heated up by the heat pump or
other external heat generator (Solaris solar installation, additional heater). The cold water flowing downstream of the warm
water extraction cools the lower area of the integrated storage tank to maximum effect.
The drinking water is heated indirectly in a corrosion resistant stainless steel corrugated pipe heat exchanger by the
unpressurised water from the integrated storage tank. On its way to the top, it continuously absorbs the heat from the
storage tank water.
The direction of throughflow by the counterflow principle and the helical shape of the heat exchanger creates a distinct
temperature layering in the storage tank. As high temperatures can be maintained for a very long time in the upper section of
the storage tank, a high hot water output is achieved even if water is drawn off over a long period of time.
During room cooling operation the 3-way diverter valves (3UV1 + 3UVB) installed in the interior heat pump unit
(HPSU compact) shut down the flow to the storage tank charging/heating support. The circulation pump of the internal heat pump
device (HPSU compact) now directly affects the heating circuit. The refrigerant compressor installed in the external heat pump
unit (RRHQ) reverses the effect of the refrigerant circuit. The water in the heating system is pumped through the circulation pump
in the interior heat pump unit (HPSU compact) and is cooled down there.
The heating/cooling output that can be used on the liquefier (interior heat pump unit), in relation to the electrical
power of the refrigerant compressor (external heat pump unit), increases as the difference between the
vaporisation and liquefaction temperature in the refrigerant circuit decreases.
A low heat carrier temperature (flow temperature) can be attained in particular with the underfloor heating
system, as the heat transfer area is extremely large. Furthermore, the building to be heated should ideally have
extremely good heat insulation, so that when there is a low heat requirement, the heat carrier can run with a low
flow temperature.