Connecting the Boiler to Electricity

• The boiler should have a dedicated circuit breaker in the electrical panel.
• To ensure safety during boiler maintenance, it is recommended to use a two-pole circuit breaker (phase + neutral) for single-phase boiler connection (230V). For three-phase connection (400V), it is recommended to use a three-pole circuit breaker. 
• When connecting the boiler to the power supply system, it is important to consider its power requirements. The cable cross-section and type for connecting the boiler should be selected according to the operating instructions (Table 1) to ensure safety and load-bearing capacity. 
• Make sure the circuit breaker for the boiler in the electrical panel is in the “OFF” position.

To access the internal electrical terminals of the boiler, perform the following steps: 

• Remove the front panel of the boiler by disconnecting 4 clips (two at the top and two at the bottom). 
• Be careful not to damage (tear off) the display connection cables.
• Disconnect the display cable. 
• Disconnect the grounding cable from the front panel.

To connect the boiler to the power supply system, perform the following steps:

1. Route one end of the power cable according to the diagram shown in the boiler’s operating instructions.
2. Connect one end of the power cable to the boiler terminals, observing the phasing and complying with the boiler’s operating instructions and electrical safety guidelines.
3. For multi-core cables, be sure to use tubular lugs. This helps securely fasten the cable cores in the terminal block and ensure their reliable operation. 
4. Tighten the screws securely when connecting the cable. 
5. Connect the grounding cable to the appropriate terminal in the terminal block. Warning! Turning on the boiler without a connected working grounding cable is strictly prohibited! 
6. Similarly, complying with the boiler’s operating instructions and electrical safety guidelines, connect the other end of the cable to the circuit breaker in the electrical panel, observing the phasing.

Before supplying power to the boiler, make sure that: 

• The bolts on the input cable at the boiler terminal block and the circuit breaker in the electrical panel are securely tightened. 
• The phasing of the power supply cable is observed.
• Reliable grounding of the boiler’s electrical part is ensured.

• Always follow the recommendations given in the user manual. Adhering to these instructions ensures a safe and efficient installation process. 
• Regularly check the connections and condition of the cables to prevent possible problems and accidents.