Pump - Riello Burners RL 34/1 MZ Installation, Use And Maintenance Instructions

Pass the hoses through the holes on the left-hand plate
5)(Fig. 21), removing the thin diaphragm that closes the two
holes or as per the following instructions: unscrew the screws 1),
now divide the insert piece into its two parts 2) and 3) and remove
the thin diaphragm blocking the two passages 4).
Install the hoses where they cannot be stepped on or come into
contact with hot surfaces of the boiler.
Now connect the other end of the hoses to the supplied nipples,
using two wrenches, one to hold the nipple steady while using the
other one to turn the rotary union on the hose.
6.4

Pump

In case of use with gas oil containing up to 10%
Bio blend, it will be essential to use flexible oil
lines suitable for bio fuel use.
WARNING
Please contact Riello for further information.
Key (Fig. 22)
1 - Suction line
2 - Return line
3 - Pressure gauge attachment
4 - Vacuometer connection
5 - Pressure adjustment screw
6.4.1 Technical data
Suntec ALV 57 CK
Min. delivery rate at 12 bar pressure
Delivery pressure range
Max. suction depression
Viscosity range
Max. gas oil temperature
Max. suction and return pressure
Pressure calibration in the factory
Filter mesh width
Hydraulic system
D602
Fig. 22
G 1/4"
G 1/4"
G 1/8"
G 1/8"
kg/h 45
bar 7 - 15
bar 0.45
2
mm /s (cSt) 1 - 12
°C 60
bar 2
bar 12
mm 0.15
Tab. I
21
6.4.2 Pump priming
Before starting the burner, make sure that the
tank return line is not clogged.
Obstructions in the line could cause the seal-
WARNING
ing organ located on the pump shaft to break.
(The pump leaves the factory with the by-pass
closed).
– In order for self-priming to take place, one of the screws
3)(Fig. 22) of the pump must be loosened in order to bleed off
the air contained in the suction line.
– Start the burner by closing the control devices and the elec-
trical network switch. The pump must rotate in the direction of
the arrow marked on the cover.
– The pump can be considered to be primed when the light oil
starts coming out of the screw 3).
– Stop immediately the burner and tighten the screw 3).
The time required for this operation depends upon the diameter
and length of the suction tubing.
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 trans-
former to cool.
Do not illuminate the photocell or the burner will lock out; the
burner should lock out anyway about 10 seconds after it starts.
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
WARNING
the opening on the vacuum meter prior to starting;
otherwise, the pump will seize.
Whenever the length of the suction piping ex-
ceeds 20-30 meters, the supply line must be filled
using a separate pump.
GB
4
1
2
3
D7437
5
Fig. 21
6426