Marine heating system Installation Instructions
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7.2.3 Fuel extractor
Fuel extractor with in-built blister separator
The fuel extractor is a special t-piece with an integrated blister separator. Installation is possible in
the feed to the engine if no priming pump is available in the tank, or in the engine return feed if this
reaches nearly to the bottom of the tank. When selecting the fuel extractor, pay attention to the
available pipe diameter.
7.3 Fuel line
Fuel line material (metal/plastic): comply with regional/national regulations!
Fire risk! In the engine compartment, fuel lines must be metal and
connecting hoses between separate components must be made of
fire resistant material (DIN-EN-ISO 7840).
Installation kits for metal fuel lines: see parts catalog.
Use stainless steel hose clamps for fuel lines.
• Use only stainless steel hose clamps to secure plastic fuel lines.
• Metal pipes: pay attention to clean working. Before assembly, remove all contamination and
burrs from the junction points.
• Do not over-tighten union nuts (otherwise leaks will occur).
• Route the fuel line as straight as possible and slightly ascending so that air bubble escape
towards the heater.
• Secure the line at regular distances, avoid kinks.
• Keep away from heat sources.
7.4 Metering pump
The metering pump of some heating systems is supplied through its own cable harness and
depending on the heat capacity required feeds the fuel into the combustion chamber of the heater.
Because of their individual propeller blades, the separate metering pumps make a ticking noise.
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