Riello PRESS 140 P/N Installation, Use And Maintenance Instructions page 25

6.11.1 Hydraulic connections
 Make sure that the hoses to the pump supply
and return line are installed correctly.
CAUTION
Install the hoses where they cannot be stepped on or come into
contact with hot surfaces of the boiler.
During the installation, hoses must not be
stressed with twisting.
Periodically clean the tank filter.
ATTENTION
Make sure that the nozzle has no filter.
Installation
6.11.2 Hydraulic circuit diagram
– Burner stand-by conditions
– P oil pressure switch: it can be adjusted from 2 to 15 bar, in
case of excessive back pressure on the fuel return line, it
locks the burner (recommended calibration at 5 bar).
23 GB
D2009
Fig. 21
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