THERMEx Nova 50 Series

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

The device described in this manual is an electric water heater from the Thermex brand, specifically the "Nova" series. It is designed to provide hot water for household and industrial facilities, with the ability to connect to a cold and hot water supply pipeline.

Function Description

The Thermex Nova electric water heater is a storage-type device that heats and stores water. It features a durable steel tank with an ecological polyurethane foam insulation, two threaded pipes for cold and hot water connection, and a protective cover. The internal tank is special glass-porcelain coated, which reliably protects the inner surface from corrosion.

Key components include a heating element (EcoDryHeat), a thermostat, a relief valve, and a protective cover with control elements. The heating element is a "dry" type, meaning it does not directly contact the water, which helps prevent scale buildup and extends its lifespan. The thermostat maintains the water temperature within a range of +70°C (±5°C). A magnesium anode is integrated to neutralize the effects of electrochemical corrosion on the inner tank.

The water heater is equipped with a protective cover that houses the control elements. Depending on the model, it may feature one or two control lamps indicating the instrument operation or power selection keys. Some models include a Wi-Fi Motion feature, allowing for remote control and monitoring via a smartphone application.

Important Technical Specifications

The Nova series water heaters are available in various capacities, ranging from 30 to 150 liters, with specific models including Nova 50V Slim, Nova 50V, Nova 80V, and Nova 100V.

Pressure in the cold water line: 0.05/0.6 MPa
Power supply network: Single-phase, 230 V ~, 50 Hz
EWH Wattage: 2000 W
Diameter of the threads of the cold and hot water connection pipes: G1/2
Protection class of the water heater: IPX4
Operation at ambient temperature: +3...+40 °C
Adjustment range of water heating temperature: +18...+70 °C
Accuracy of temperature maintenance in storage mode: ±5 °C

The manual also provides a table detailing heating time, constant heat loss, and actual annual energy consumption for different capacities and temperature settings. For example, a 50-liter Nova 50V Slim model takes approximately 1 hour 17 minutes to heat water to 45°C, with a constant loss of 1.26 kW·h/day and an annual consumption of 460 kW·h.

Usage Features

Installation: The water heater should be installed as close as possible to the point of hot water use to reduce heat losses in the pipes. It is crucial to select a suitable location on a load-bearing wall, considering the weight of the filled water heater. Drilling holes for mounting brackets and pipes is necessary.

Water Connection: The cold water inlet (20) connects to the water supply via a pipe with a blue ring, while the hot water outlet (16) connects to the hot water system via a pipe with a red ring. A relief valve (16) must be installed on the cold water inlet pipe to prevent excessive pressure. The handle (17) on the relief valve allows for manual draining of water from the tank. It is recommended to install a pre-treatment filter for cold water.

Electrical Connection: The water heater must be connected to a properly grounded electrical network. For models with a standard C4 plug, a 16 A, 250 V double-grounding terminal is used. It is essential to ensure that the parameters of the electrical network match the technical specifications of the water heater.

Operation: The thermostat knob allows users to set the desired water temperature. The device will automatically heat water to the set temperature and maintain it. Some models offer power selection keys for different heating modes.

Safety Precautions:

Do not connect the water heater to a power supply network that does not have a ground connection.
Ensure the water supply system pressure is between 0.05 and 0.6 MPa.
Never operate the EWH without water.
Do not use the EWH for cooking or other non-intended purposes.
Regularly check the relief valve for proper functioning.
In case of malfunction, disconnect the EWH from the power supply network and shut off the water supply.

Maintenance Features

Periodic Maintenance: Regular maintenance is crucial for the long-term operation of the EWH.

Magnesium Anode Replacement: The magnesium anode is a consumable part and should be replaced at least once a year. If the water contains a large number of chemical impurities, the magnesium anode should be replaced every six months. Failure to replace the anode in time may lead to corrosion of the heating element and the inner tank, which is not a warranty case.
Scale Removal: Periodically, the heating element may accumulate scale. This can be removed using descaling agents or mechanically. Removing scale helps maintain heating efficiency and prolong the life of the heating element.
Draining the EWH: To drain the water from the EWH, turn off the power, close the cold water inlet valve, open the hot water faucet on the mixer, and open the relief valve. For complete drainage, the protective cover may need to be removed, and the removable flange opened.
Cleaning: Periodically clean the EWH's exterior with water and soap.

Troubleshooting: The manual provides a table of possible malfunctions and their remedies. For example:

Decreased hot water pressure: Clogging of the relief valve inlet opening. Remedy: Remove the valve and rinse it with water.
Increased heating time: Heating element is covered with scale. Remedy: Remove the heating element and descale it.
EWH works, but does not heat water: The valve (24) is not closed or failed. Remedy: Close or replace the valve (24).
Frequent triggering of the thermal switch: The set temperature is close to the temperature limit. Remedy: Turn the thermostat knob toward temperature decrease.

For any complex issues or repairs, it is recommended to contact a certified service center. The warranty period for the water heater is 1 year, and for the water-containing reservoir (internal tank) is 5 years.