Product Overview & Area of Application
The 150-liter GEMA ETWS hot water storage tank is a standing 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 150-liter class and is designed as a floor-standing tank with water connections on top. The actual storage capacity is 144 liters, offering a larger hot water reserve than the smaller ETWS versions in the series.
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 storage tank is made of steel sheet and has a high-temperature-resistant ceramic protective coating on the inside.
A magnesium anode is provided for additional corrosion protection. The thermal insulation consists of polyurethane foam, and the outer casing is made of HIPS plastic. A heating element connection with 1 1/2 inch internal thread is available for suitable electric heating cartridges.
Everyday Benefits
The standing design and the upward-facing 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 electrically.
The ceramic inner coating, the magnesium anode, and the insulated design are intended for permanently stable tank operation. The 150-liter class version is particularly useful when central hot water preparation with a somewhat larger storage reserve is required.
System Integration & Compatibility
The storage tank is designed 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 fitted with 3/4 inch external threads.
For the use of an electric heating cartridge, the storage tank is prepared with an MG connection 1 1/2 inches. For the ETWS 150 model, 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 150 liters / WGJ-S OEM 150 MG.
| Storage tank type | Domestic hot water storage tank / hot water storage tank |
| Storage tank capacity | 144 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 | 980 mm |
| Width | 625 mm |
| Depth | 625 mm |
| Net weight | 76 kg |
| Connection size water / heat exchanger / circulation | 3/4 inch external thread |
Assembly
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 specialists.
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 electric heating element is connected via the designated connection piece and according to the separate installation and operating instructions for the heating element.
Notes
The storage tank may only be operated when filled with water. Before using an electric heating element, 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 water hardness, cleaning and descaling may also be required.
Scope of delivery
- GEMA ETWS 150 liter domestic hot water storage tank / WGJ-S OEM 150 MG
- Safety valve