Riello P 450 P/G Manuel D'entretien page 57

Normal
Remote control
Motor
Ignition transformer
Valves F - R - S
Flame
Lock-out
5 s
M
max
min
0
MOTOR LOCK-OUT: It is caused by the motor overload relay if, overload or no phase occurs.
Print on the data label, into the correspondent cell,
the kind of performance: two stage progressive or
modulating.
HYDRAULIC LINE SCHEMA
VS VF
FO
VR1
VR PO
C2
P
Cn - Control cams
FO - Oil filter
MM - Oil delivery pressure gauge
5483
BURNER START-UP PROGRAM
45 s 22,5 s
MM
SM
RO
C1
MR
2583
Lock-out because no ignition
2,5 s
5 s 5 s
Oil pressure switch
If the back pressure in the fuel return line is
too high, the pressure switch stops the burner.
MV
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.
MR - Oil return pressure gauge
P - Pump with filter and pressure regulator
RO - Oil return pressure regulator
GB
14
2,5 s
45 s 22,5 s
5 s
2582