Riello P 450 P/G Instructions Pour L'installation, L'utilisation Et L'entretien page 66

HYDRAULIC LINE SCHEMA
VS VF
FO
VR1
VR PO
C2
P
Cn - Control cams
FO - Oil filter
MM - Oil delivery pressure gauge
Oil pressure switch
If the back pressure in the fuel return line is too high, the pressure switch stops the burner.
Recommended setting (recommended values with resistance of pipe returning to tank ≤ 0,5 bar): 4,0 ÷ 4,5 bar
If control box lockout occurs (pos. P), reset the pressure switch with values increasing by 0.5 bar.
5483
MM
SM
RO
C1
MR
2583
MV
MR - Oil return pressure gauge
P - Pump with filter and pressure regulator
RO - Oil return pressure regulator
16
GB