Product Overview & Application Area
The 100-liter GEMA ETWS hot water tank is a freestanding domestic hot water tank for the central heating and storage of drinking or service water. It is suitable for apartments, single-family homes, multi-family homes, and comparable installation areas where hot water is provided via a boiler or a suitable heating system.
This model belongs to the 100-liter class and is designed as a compact floor-standing tank with water connections on top. The actual tank capacity is 102 liters, providing a space-saving hot water reserve for small to medium residential applications.
Technology & Equipment
The domestic hot water tank is equipped with a pipe heat exchanger through which heat from the heating system is transferred to the stored water. The tank body is made of sheet steel and has a high-temperature-resistant ceramic protective coating on the inside.
A magnesium anode is provided as additional corrosion protection. The thermal insulation consists of polyurethane foam, and the outer casing is made of HIPS plastic. A heater flange with a 1 1/2 inch female thread is available for suitable electric heating elements.
Everyday Benefits
The freestanding design and top-mounted connections support clear pipe routing in the utility room. Thanks to the integrated heat exchanger, hot water preparation can be carried out via the existing heating system without the tank having to be operated exclusively by electricity.
The ceramic inner coating, the magnesium anode, and the insulated construction are designed for long-term stable tank operation. The compact design of the 100-liter class is particularly useful when central hot water preparation is to be implemented in a limited installation space.
System Integration & Compatibility
The storage tank is intended for integration into domestic hot water systems with low-temperature water boilers and central heating water boilers. Hot domestic water, cold water, heat exchanger flow, heat exchanger return, and circulation are each designed with 3/4 inch male thread.
For the use of an electric heating cartridge, the storage tank is prepared with an MG connection 1 1/2 inches. For the model ETWS 100, according to the technical assignment, EJK heating cartridges with insulated heating elements up to 4.5 kW are intended; installation is carried out according to the respective instructions of the heating cartridge.
Technical data at a glance
The following technical data refer to the model GEMA ETWS 100 liters / WGJ-S OEM 100 MG.
| Storage tank type | Domestic hot water storage tank / hot water storage tank |
| Storage tank capacity | 102 l |
| Number of heat exchangers | 1 |
| Insulation | Polyurethane foam |
| Storage tank material | Steel sheet, ceramic-coated inside |
| Suitable for drinking water | Yes, for domestic hot water preparation |
| Max. operating pressure | 6 bar |
| Max. storage tank temperature | 95 °C |
| Height | 770 mm |
| Width | 625 mm |
| Depth | 625 mm |
| Net weight | 64 kg |
| Connection size water / heat exchanger / circulation | 3/4 inch external thread |
Installation
The storage tank is connected in a vertical position to the water supply network and the heating system. Installation and work on the water and electrical installations should be carried out by appropriately qualified specialist personnel.
A safety valve must be provided at the cold water inlet. No shut-off valves may be installed between the safety valve and the storage tank. The connection of an electric heating cartridge is made via the designated connection piece and according to the separate installation and operating instructions for the heating cartridge.
Notes
The storage tank must only be operated when filled with water. Before using an electric heating cartridge, it must be ensured that the storage tank is completely filled with water.
For reliable operation, the function of the safety valve and the condition of the magnesium anode must be checked regularly. The anode should be inspected at least once a year and replaced according to the instructions. Depending on the water hardness, cleaning and descaling work may also be required.
Scope of delivery
- GEMA ETWS 100 liter domestic hot water storage tank / WGJ-S OEM 100 MG
- Safety valve