Product Overview & Area of Application
The Sunex FISH S2 150 X is a standing solar hot water storage tank with a nominal capacity of 150 liters for heating and storing domestic hot water. Two independent smooth-tube heat exchangers allow the hydraulic integration of two heat sources, for example a solar thermal system and a boiler or another suitable heat generator.
With its compact height of 1,077 mm, the storage tank is particularly suitable for systems where two heat generators are to be integrated but only limited space is available in the utility or boiler room.
Technology & Equipment
The storage tank vessel is made of enamelled steel S235JR. The inner surface in contact with drinking water is protected against corrosion by a high-quality enamel coating and two magnesium anodes. The lower heat exchanger has a transfer surface of 0.78 m², the upper heat exchanger a surface of 0.47 m².
The equipment includes an inspection opening, a circulation connection, several sensor pockets for temperature sensors, a thermometer connection, as well as connections for the professional retrofitting of a suitable electric heating element. The firmly integrated 50 mm PUR rigid foam insulation reduces heat losses. The storage tank achieves energy efficiency class B with a standby heat loss of 44 W.
Everyday Benefits
The two separate heat exchangers create a flexible basis for bivalent hot water systems. Solar heat can, for example, be integrated via the lower heat exchanger, while the upper heat exchanger handles reheating via another heat generator.
The inspection opening facilitates maintenance and cleaning work on the inside of the storage tank. The circulation connection and several sensor positions support adaptation to different system and control concepts.
System Integration & Compatibility
The Sunex FISH S2 150 X can be integrated into closed domestic hot water systems with solar thermal, boilers, wood heating, or another professionally designed heat source. Connection to a heat pump is also technically possible, provided that the heat exchanger surface, output, flow rate, and required hot water temperature match the respective system.
Connections with 1 1/2 inch are available for the electric auxiliary heating. The electric heating element, safety group, domestic hot water expansion vessel, control system, and other system components must be selected according to the specific installation.
Technical data at a glance
| Storage tank type |
Hot water storage tank with two heat exchangers |
| Nominal capacity |
150 liters |
| Suitable for drinking water |
Yes |
| Number of heat exchangers |
2 |
| Material of the storage tank |
Steel S235JR, enamelled |
| Insulation |
50 mm rigid PUR foam |
| Maximum storage temperature |
95 °C |
| Maximum operating pressure of the storage tank |
10 bar |
| Dimensions |
Height 1,077 mm, diameter 607 mm |
| Empty weight |
66 kg |
Installation
The tank must be installed exclusively upright on a level, load-bearing, and permanently dry surface. The installation area must be frost-free and provide sufficient space for connection, maintenance, and anode work.
Installation, hydraulic connection, and commissioning may only be carried out by appropriately qualified specialist personnel. On the drinking water side, a safety valve with a response pressure of 6 bar, a suitable drinking water expansion vessel, and, if necessary, a pressure reducer must be provided.
Notes
The tank must be completely filled with water and vented before the heat exchangers or an optional electric heating element are put into operation. No shut-off valve may be installed between the safety valve and the cold water inlet.
The magnesium anodes, the safety valve, and the tightness of the system must be checked regularly. The specific sizing, hydraulic integration, and temperature control depend on the connected system and do not replace professional planning.
Scope of delivery
- Sunex FISH S2 150 X solar hot water storage tank with permanently integrated PUR insulation and gray outer jacket
