Servomotor; Oil Pressure Switch; Pump - Riello RL 190/M Installation, Use And Maintenance Instructions

(A)

PUMP

SUNTEC TA 2
A kg/h
B bar
C bar
D cSt
E °C
F bar
G bar
(B)
(C)
D887
D1979
TA 2
456
7 - 40
0,45
4 - 800
140
5
30
1 2
D791
SERVOMOTOR (A)
The servomotor provides simultaneous adjust-
ment of the air gate valve, by means of the vari-
able profile cam and the pressure regulator. The
servomotor rotates through 130° in 42 seconds.
Do not alter the factory setting for the 5 cams;
simply check that they are set as indicated
below:
Cam I
Limits rotation toward maximum position.
Cam II
Limits rotation toward the minimum position.
When the burner is shut down the air gate valve
must be closed: 0°.
Cam III
Adjusts the ignition position and the MIN output.
Cam IV - V

OIL PRESSURE SWITCH

The oil pressure switch 5)(A) page 3 is factory
set to 3 bar. If the gas oil pressure reaches this
value in the return piping, the pressure switch
stops the burner. Burner starts again automati-
cally if the pressure goes down under 3 bar after
burner shut down. If a loop circuit with Px pres-
sure feeds the burner, the pressure switch
should be adjusted to Px + 3 bar.
PUMP (B)
1 - Suction
2 - Return
3 - Pressure gauge attachment G 1/8"
4 - Vacuum meter attachment
5 - Pressure adjustment screw
6 - By-pass screw
A - Min. delivery rate at 20 bar pressure
B - Delivery pressure range
C - Max. suction depression
D - Viscosity range
E - Max light oil temperature
F - Max. suction and return pressure
G - Pressure calibration in the factory
PUMP PRIMING
- Before starting the burner, make sure that
the tank return line is not clogged.
Obstructions in the line could cause the
sealing organ located on the pump shaft to
break.
- In order for self-priming to take place, the
screw 3)(B) of the pump must be loosened to
bleed off the air contained in the suction line.
- Start the burner by closing the control devices
with switch 1)(C) in the "MAN" position. As
soon as the burner starts, check the direction
of rotation of the fan blade, by looking through
the flame inspection window 24)(A)p.3.
- The pump can be considered primed when the
light oil starts coming out of the screw 3). Stop
the burner: switch 1)(C) set to "OFF" and
tighten the screw 3).
The time required for this operation depends
upon the diameter and length of the suction tub-
ing. If the pump fails to prime at the first starting
of the burner and the burner locks out, wait
approx. 15 seconds, reset the burner, and then
repeat the starting operation as often as
required. After 5 or 6 starting operations allow 2
or 3 minutes for the transformer to cool.
Important: the a.m. operation is possible
because the pump is already full of fuel when it
leaves the factory. If the pump has been
drained, fill it with fuel through the opening on
the vacuum meter prior to starting; otherwise,
the pump will seize. Whenever the length of the
suction piping exceeds 20-30 meters, the supply
line must be filled using a separate pump.
10
: 130°
: 0°
: 20°
: not utilized.
G 1/2"
G 1/2"
G 1/8"