Thermo 230/300/350
7.1.1.
Permissible dimensions of the fuel lines
– Inside diameter for suction and return lines: 6 mm (other diameters
on request).
– Max. permissible length of each suction and return line: 15 m
– Max. permissible suction height: 2 m
– Max. permissible admission pressure: 0.3 bar
– For a differing fuel supply system ensure that the negative pres-
sure in the suction line directly before the heater 500 mbar not
exceeds.
7.2.
Fuel Filter
A fuel filter supplied or approved by SPHEROS must be used (consider
the flow direction). To avoid malfunctions the filter or filter insert is to be
replaced annually before the cold weather season starts.
Fuel Supply
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