SERO BWA-SS-10 User Manual - page 4
4
BWA-SS series consists of five main components:
and Brine sytem)
2.1 Heat Pump Principle
A heat pump can exploit the energy contained in natural heat sources. Or, to put it differently, the heat
pump ”collects” heat energy from the heat source. This makes the heat pump a very environmentally friendly and
economically sound alternative for space heating.
a. A hose filled with liquid (Brine system) is immersed into a lake, dug into the ground or sunk into the rock. The
Brine sytem absorbs the heat energy of the heat source so that the temperature of the water circulating in the
hose is raised a few degrees.
b The Brine system is circulated to the heat pump’s evaporator. Here the heat energy of the Brine system causes the
refrigerant, circulating through the evaporator, to boil and turn into a gas – it evaporates.
c The refrigerant, having absorbed heat energy, is circulated to the compressor where pressure and temperature
are raised.
d The refrigerant continues to the condenser. When condensing, it releases heat energy to the heat carrier,
circulating through the condenser. The temperature of the refrigerant sinks, and it returns to its liquid state.
e The heat energy released is carried by the heating circuit to water heater and radiator or floor heating systems.
f At last the refrigerant is led through the expansion valve, where its pressure is reduced, and then continues to the
evaporator. The process is restarted.
an immersion heater. The Tap Water Stratification system improves the efficiency of heat transfer by keeping the water in
distinct thermal layers in the water tank.
The unit is fitted with a regulating computer, which is controlled over a graphic display unit.
Heat is distributed throughout the house over a hydronic heating system referred to as low temperature
system with a maximal water temperature to radiators ( Feed line temperature) of 65°C. Most of the heating
demand is taken care of by the heat pump (compressor unit), the auxiliary heater being started only when
demands exceed available heat pump capacity.
a. Heat Pump Unit
Rotory or Scroll-compressor
Stainless steel heat exchangers
Circulation pumps for heating systems
Valves
and
safety
equipment for refrigerant
system,
complete
with necessary electric components
b. Water Heater
150 or 200 litre
Lined with copper sheet against corrosion or made of stainless steel
Maintenance free as no anode is used
c. Reversing Valve
Opening or closing the connection to water heater according to operating mode: heating or warm water production
d. Auxiliary Heater
3 / 6 / 9
kW electric heating element
Three-step capacity control
Fitted on supply line
Delivers back-up heat in case of great heat demand that exceeds heat pump capacity
Starts automatically, provided operating mode “AUTO” has been selected
e. Regulating Equipment
The regulating system controls heat pump components (compressor, circulation pumps, auxiliary heater and
reversing valve). Based on data received from sensors, it starts or stops heat pump operation and determines
whether heating or warm water shall be produced. The system consists of:
Control computer with graphic display unit
Temperature sensors (outside air,room, feed line, return line