Manual - Saunier Duval Thelia 623 Central Heating Boiler
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Frequently Asked Questions
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What is the best pressure for my central heating boiler? Verified
The right pressure is between 1 and 1,5 bar. Never let the pressure rise above 2 bar.
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The piping and radiators make noise. What is causing this? Verified
There is probably air in the heating system. It's best to purge the air from the system.
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This manual was originally published by Saunier Duval.