TECHNICAL DOCUMENTATION SOLINK The energy source for heat pumps Anwendung • Einsatz Special advantages SOLINK represents a new type of heat source for heat pumps in addition to geothermal/ground heat exchangers and outdoor air evaporators. It is used in both single-family homes and multi-family apartment blocks as well as office and commercial buildings, especially in the following cases: • Fulfils design requirements regarding minimum share of renewable energy • Highly efficient heating system without earthworks Another application is the replacement of old heat pumps: • Regeneration of ground temperature due to previously undersized ground collectors after heat pump replacement • Highly efficient climate-friendly system • Heat and power from a single roof installation • Higher PV yield thanks to module cooling effect • Silent operation • Better cost effectiveness than air-source heat pumps • Same or lower investment costs compared to ground source heat pumps plus solar PV

TD-SOLINK: Contents • Combined solar/air heat exchanger and PV module • Complete heat supply for brine heat pumps • Electrical power source for heat pumps and household • Total annual electricity use for heating can be generated over the year 1.7 Combining with ground heat exchangers 3 Building Integration, Piping 4 Collector and Mounting System

1 Connection to Heat Pump SOLINK modules are connected to a brine heat pump in place of ground heat exchangers. Inverter Hydraulic components Heat pump Washer Dryer Dishwasher 1.1 Suitable heat pumps SOLINK modules are designed for operation with selected standard brine heat pumps. For a high efficiency and minimal supplementary electric heating, the minimum permissible brine inlet temperature should be as low as possible: slightly lower than the lowest expected air temperatures of the region where the system is to be operated. For example, with minimum outside temperatures of -10 °C to -12 °C...

1.5 VARICAL - Thermal buffer store The modular buffer tank VARICAL makes large buffer volumes possible even with limited access and space. It can be used purely as a heating buffer tank, as a domestic hot water buffer tank or as a combined thermal store (in all cases with a fresh water module). VARICAL, like the SOLUS stores, also features an integrated hydraulic separator. This ensures that even during simultaneous heat pump and heating operation only the surplus is fed into the storage tank, with lower resulting volume flow for better thermal layering. Max. heating power as buffer store: 100+...

Function \ Actuators Temperature restriction Central heating / Buffer charging / DHW De-icing / snow-shedding / direct charging Hydraulic component CONTROL SOLINK button Further necessary fittings (source side) Safety valve assembly Filling & flushing valve assembly See detail view for further fittings Limiting brine temperature with an active mixing valve controlled by CONTROL 602 SOLINK, de-icing and snow shedding via thermal store internal heat exchanger, push button for manually triggering the snow shedding function. Function \ Actuators Temperature restriction Central heating / Buffer charging...

Separate domestic hot water and heating buffer stores with internal heat exchangers (third party products). The heat exchanger in the DHW store must be large enough for the capacity of the heat pump at full output (at max. brine temperature). Function \ Actuators femperature restriction Central heating / Buffer charging / DHW De-icing / snow-shedding / direct charging Further necessary Expansion vessel Safety valve assembly tittings (source side) CONTROL SOLINK button check valve needed if de- icing takes place through same store connection as heating loop. Filling & flushing valve assembly See...

Restriction of brine temperature via thermostatic mixing valve; without de-icing or snow-shedding Simplest and least expensive scheme for regions with max. 12 days of snow per year. Without the snow shedding function, snow-covered collectors cause increased power from the grid due to the loss of PV output. Again, the heat exchanger in the DHW store must be large enough for the performance of the heat pump at full output (at max. brine temperature). Hybrid operation with gas boiler Bivalent operation with peak load boiler: The boiler is activated when the heat pump capacity is lower than the required...

Function \ Actuators iperature restrictic Central heating / Buffer charging / DHW Geothermal ground loop only CONTROL SOLINK ground loop Combined operation with geothermal probes or ground heat exchangers for regeneration and increased efficiency. The power extracted from the geothermal probes is reduced by preheating in the SOLINK collectors. If the collectors are warmer than the ground, the probes are regenerated - both when the heat pump is running and at standstill. Controller logic ensures the collectors are excluded at subzero temperatures, hence the de-icing function is not necessary....

The specifications in this technical documentation and associated installation instructions relate exclusively to the incorportation of the SOLINK collectors, i.e. the brine side. Please note all applicable instructions relating to the heat pump, especially as they relate to the condensor/heating side of the system. At this point it is worth mentioning two points relating to the heat distribution side: 1. Install a T-piece for the heating return flow close to the store connection, and a spring-loaded check valve (with cracking pressure 100-200 mbar) before or after the condensor pump. This avoids...

Rule of thumb: Module area [m2] = F x Heat pump output [kW] at design temperature (usually -15 °C) The following table shows the pressure drop across the collector field for different field sizes (fluid properties of ethylene glycol 40%, -15 °C). If fields with adjacent collector rows of different length are set up, the maximum difference between specific flows generally remains below 30% without requiring adjustment. If required, the flow distribution can be easily checked with the HYDRA simulation program for specific field designs, see 2.6. 2.4.2 Mounting system Mounting system sets for flat...