1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your THERMOR Duralis 271112 electric storage water heater. Please read this manual thoroughly before installation and use, and keep it for future reference.
The THERMOR Duralis 271112 is a vertical wall-mounted electric water heater with a 150-liter capacity, designed to provide hot water for households of approximately two adults. It features an electric resistance and thermostat for efficient water heating.
2. Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read these instructions thoroughly before installing or servicing this equipment.
- Installation must be performed by a qualified professional in accordance with all local and national electrical and plumbing codes.
- Ensure the electrical supply matches the specifications of the water heater (230V Mono).
- Do not operate the water heater if it is damaged or not functioning correctly.
- Always disconnect power before performing any maintenance or service.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
3. Product Overview
The THERMOR Duralis 271112 is an electric storage water heater designed for vertical wall mounting. It consists of a tank with an electric resistance and an electric thermostat. Heated water is stored in the upper part of the tank, while cold water remains in the lower part, ensuring a continuous supply of hot water.
Key features include:
- Capacity: 150 Liters
- Power: 1800 Watts
- Voltage: 230 Volts (Mono)
- Heating Time: Approximately 5 hours and 14 minutes
- Energy Class: C
- Installation Type: Vertical wall-mounted

Figure 1: Front view of the THERMOR Duralis 271112 electric water heater.

Figure 2: Example installation of the THERMOR Duralis 271112 water heater in a bathroom setting.
4. Specifications
| Feature | Value |
|---|---|
| Manufacturer | Thermor |
| Model Number | 271112 |
| Dimensions (L x W x H) | 51.3 x 51.3 x 115.5 cm |
| Weight | 35 kg |
| Color | White |
| Style | Simple |
| Shape | Circular (full) |
| Power Source Type | Electric cable |
| Voltage | 230 Volts (AC) |
| Power | 1800 Watts |
| Quantity of items | 1 |
| Electrical Plug Type | Wall-mounted |
| Included Components | 1 Product + Manual |
| Energy Class | C |

Figure 3: Energy label indicating Class C efficiency for the THERMOR Duralis 271112.
5. Setup and Installation
The THERMOR Duralis 271112 water heater is designed for vertical wall mounting. Due to its nature as an electrical and plumbing appliance, installation must be carried out by a certified professional to ensure safety and compliance with all applicable regulations.
- Location: Choose a suitable wall capable of supporting the weight of the water heater when full (approximately 150 kg + 35 kg = 185 kg). Ensure adequate space for maintenance and connections.
- Mounting: Securely mount the water heater vertically to the wall using appropriate fasteners.
- Water Connections: Water connections will need to be made either above or below the tank, or on one of its sides, depending on the specific model and installation requirements. Refer to the detailed installation diagram provided in the physical manual.
- Electrical Connection: Connect the water heater to a dedicated 230V (Mono) electrical circuit, protected by an appropriate circuit breaker and residual current device (RCD).
- Safety Group: Install a safety group (pressure relief valve) on the cold water inlet to protect against overpressure.

Figure 4: Technical diagram illustrating dimensions and potential connection points for vertical wall-mounted water heaters. Consult this diagram for precise measurements and installation planning.
6. Operating Instructions
Once properly installed and filled with water, the THERMOR Duralis 271112 water heater operates automatically to maintain the desired water temperature.
- Initial Startup: After installation and filling the tank with water, switch on the electrical supply to the water heater. The heating element will begin to heat the water.
- Temperature Setting: The water heater is equipped with a thermostat. Adjust the thermostat to your desired water temperature. Refer to the physical manual for specific thermostat adjustment procedures.
- Heating Cycle: The water heater will heat the entire 150 liters of water in approximately 5 hours and 14 minutes. Once the set temperature is reached, the thermostat will switch off the heating element. It will reactivate automatically when the water temperature drops.
- Energy Efficiency: This model has an energy class C rating, indicating good energy performance.
7. Maintenance
Regular maintenance ensures the longevity and efficient operation of your water heater. It is recommended to have your water heater inspected by a qualified professional at least once every two years.
- Safety Group Check: Manually operate the safety group (pressure relief valve) lever once a month to ensure it is not blocked. This will release a small amount of water.
- Descaling: Over time, mineral deposits (limescale) can accumulate inside the tank and on the heating element, reducing efficiency. Descaling should be performed periodically by a professional, especially in hard water areas.
- Anode Inspection: The water heater is equipped with an anode (magnesium or impressed current) to protect the tank from corrosion. This anode should be inspected and replaced as necessary by a professional during maintenance.
- Leak Checks: Periodically inspect all plumbing connections for any signs of leaks.
CAUTION: Always disconnect the electrical supply to the water heater before performing any maintenance.
8. Troubleshooting
This section provides solutions to common issues you might encounter. For more complex problems, contact a qualified technician.
- No Hot Water:
- Check if the electrical supply to the water heater is on.
- Verify the circuit breaker has not tripped.
- Ensure the thermostat setting is appropriate.
- Allow sufficient time for the water to heat (approx. 5h 14min for a full tank).
- Insufficient Hot Water:
- The demand for hot water might exceed the heater's capacity.
- Thermostat may be set too low.
- Possible limescale buildup reducing efficiency (requires professional descaling).
- Water Leaks:
- Check connections for tightness.
- A small drip from the safety group is normal during heating cycles; continuous dripping may indicate a faulty safety group or excessive pressure.
- If leaks persist from the tank itself, immediately turn off the water supply and electrical power, then contact a professional.
- Unusual Noises:
- Popping or rumbling noises can indicate sediment buildup in the tank. Professional descaling is recommended.
9. Warranty and Support
This product includes a manufacturer's warranty. Details regarding the warranty period, terms, and conditions are typically provided in the separate warranty document or the comprehensive manual included with your purchase. Please refer to these documents for specific information.
For technical support, service, or warranty claims, please contact your retailer or an authorized THERMOR service center. Ensure you have your product model number (271112) and proof of purchase available when seeking assistance.