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7.
INTEGRATION IN THE BUILDING HEATING SYSTEM
To best use the unit, we recommend hydraulically integrating it into the building heating system as shown in
the system diagrams below. The device always operates in the optimum power range and with the highest
efficiency. Seasonal changes in heating and hot water requirements are automatically recorded and adjusted.
Due to this type of integration of the system, the building heating technology remains virtually unaffected.
RECOMMENDATION AND SYSTEM DIAGRAM
Combination
– return flow boost (heating) + preheating stage (domestic hot water): To integrate an AWN in
the heat supply of a building, Aereco recommends a combination with a stratified storage tank with discharge
system and preheating stage for domestic hot water (DHW). This enables both an increase in the return flow
of the heating circuit during the heating period and support for hot water preparation throughout the year. As
a result, the heat sink available to the AWN is maximised, as are running times and contribution margins.
Independent regulation: With this concept, it is not necessary to communicate with the components in the
rest of the heating system. An independent controller measures the temperature in the upper section of the
stratified tank (S1) and the heating water return (S2) in the heating circuit installed on site. The controller
takes these measured variables into account and controls the discharge pump (P) so that the heating water
return flow is always increased (S1 > S2).
Preheating as continuous flow system: DW preheating is automatically ensured by passing through a stain-
less-steel coil in the stratified storage tank. The cold water (CW) is thus heated and then enters the water
heater. Due to the small volume in the preheating, this stage can be designed as a purely continuous system.
A DW storage tank with an internal heating water coil (storage system) would be considerably less efficient
for preheating.
The heating water pump integrated in the exhaust air heat pump automatically transfers the heat via the
heating water to the stratified storage tank. A simplified diagram for use with central heating and hot water
preparation is shown here. In the case of deviating concepts, it is possible and necessary to appropriately
adapt the integration logic.
The respective concrete dimensioning and implementation only results from an individual viewpoint. This
drawing is to be understood as a non-binding proposal and does not replace any execution planning. The
shut-off and safety devices required for professional installation are not included.
Heating circuit
WW maker
Additional heating
source
(peak load producer)
Aereco heat pump
(base load producer)
Stratified storage
