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An image of the burner in practice. This is what the installation looks like, from assembly to placement.
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The use of electric boilers directly contributes to reduced use of fossil fuels and lower CO₂ emissions. At the same time, the control options ensure that you respond flexibly to fluctuating energy prices and grid conditions.
In this way, becoming more sustainable not only yields social credit but also an economic return.
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No neutral conductor is required for the 400V connection. Use 3-core cables, as no terminals are available for neutral conductors.
The temperature controller and boiler control do require a separate single-phase 230V power supply. This control voltage must not be branched off from the main power supply. During service work, the main power supply is switched off, which would also cause the control voltage to drop out.
Single-core cables may be used, provided the phases are routed through the same cable gland. Please specify this when ordering so that the correct gland plate is included. The junction box is located on the right side by default, but the connection box can also be placed on the left or with entry from above or below. You must also indicate this when ordering.
Place the boiler in a dry, well-ventilated technical room. This room must only be accessible to qualified personnel.
Ventilation is necessary to prevent overheating and malfunctions. Maintain a target temperature of at least 0 °C and a maximum of 10 °C above the outside temperature. The required free space around the boiler depends on the boiler type. Please consult the manual for this.
The boilers have protection class IP21.
The boiler water must meet these values:
pH value: 8.5 – 9.0
Alkalinity: maximum 60 mg/l
Carbonate: maximum 25 mg/l
Chloride: maximum 100 mg/l
Sulphate: maximum 60 mg/l
Regularly check whether the water quality meets these requirements. This prevents damage to the boiler.
The installation must be equipped with two relief valves, without valves in between. In addition, an extra min/max pressure protection with pressure switches and a low-water protection are required.
The expansion vessel is connected to the supply line. A socket connection is provided for this purpose.
The temperature is controlled by an electronic PID controller. This is adjustable from 5 to 95 °C. The boiler is set to 80 °C by default and has a maximum temperature protection of 110 °C.
The power is built up and switched off in steps of 7, 15, or 30, depending on the boiler type. The standard ramp-up time is 40 seconds. The ramp-down time is 5 seconds. Short switching times increase wear and tear.
Yes, an annual inspection is recommended. During this, check for leaks, the heating elements, electrical connections, and contactors or relays.
The manual is available as a PDF: Manual Varmeteknikk SB boiler 375-1200W. This manual also contains the error codes, the fault overview, and the parts list.
The radiation loss of the boiler is negligible due to the insulation and the limited water content.
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