500-liter hot water storage tank with high-performance heat exchanger for heat pumps
The SUNEX FISH S15 500X is a vertical hot water storage tank with a 500-liter storage volume, specially designed for efficient domestic hot water preparation in conjunction with modern heat pumps. Thanks to the extra-large smooth-tube heat exchanger with a heating surface of 4.6 m², this storage tank is ideal for larger single-family and multi-family homes with high hot water demands.
✅ Your advantages at a glance
Extra-large heat exchanger (4.6 m²): Maximum efficiency with heat pumps and high flow rates up to 2,580 l/h at 80/10/45°C.
High-quality enameling according to DIN 4753 and magnesium sacrificial anode for reliable corrosion protection and hygienically pure drinking water.
50 mm rigid PUR foam insulation with a gray outer jacket for low heat loss and energy-efficient operation.
Inspection opening (Ø125/180mm) for easy maintenance, inspection, and cleaning.
Prepared for UV-20 disinfection system and multiple connections for temperature sensors and domestic hot water sensors.
Constant output: 105kW or 2,580l/h at 80/10/45°C – ideal for high simultaneous hot water demand.
Optionally available with a titanium anode instead of the standard magnesium anode.
Robust steel construction (S235JR) with automatic welding process and high operating pressures (storage tank up to 10 bar, heat exchanger up to 16 bar).
🏠 Areas of application
Hot water preparation in single-family homes, Multi-family and two-family homes with high comfort requirements.
Combination with air-to-water and brine-to-water heat pumps for energy-efficient domestic hot water heating.
Integration into hybrid systems with other heat generators (e.g., condensing boilers), provided a suitable hydraulic concept is in place.
📊 Technical Data – Storage & Performance
Storage volume:
500 liters
Power coefficient NL:
47.4
Constant output (80/10/45°C):
105 kW / 2,580 l/h
Max. operating temperature storage:
95°C
Max. Operating temperature heat exchanger:
110°C
Max. operating pressure storage tank:
10 bar
Max. operating pressure heat exchanger:
16 bar
Test pressure storage tank:
15 bar
Table
Technical data – Design & Dimensions
Storage Material:
Steel S235JR, enamelled inside
Heat Exchanger:
Smooth tube heat exchanger made of steel pipe S235JR, surface area 4.6 m², capacity 21.9 liters
Insulation:
50 mm CFC-free rigid polyurethane foam, replaceable gray jacket
Storage Diameter without Insulation:
650 mm
Diameter with Insulation:
757mm
Storage height:
approx. 1,783mm
Diagonal:
approx. 1,891mm
Empty weight:
approx. 225 kg
... Product specifications.
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