The FA-1520 is designed with simplicity in mind, but the array of lights and symbols can look like a secret code if you aren't familiar with them.
: The boiler is programmed to always give priority to hot water supply over central heating. Safety Mechanisms
: Includes an anti-frost control for the heating circuit and an anti-seizure device for the circulation pump to prevent damage during long periods of inactivity. Troubleshooting & Maintenance Tips
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