Hydraulic Connections; Pump; Pump Priming - Riello RLS 190/E Installation, Use And Maintenance Instructions

4.11.2 Hydraulic connections

The pumps are equipped with a by-pass that separates return line
with suction line (Fig. 24).
The pumps are installed on the burner with the by-pass closed by
screw 6)(Fig. 25).
It is therefore necessary to connect both hoses to the pump.
The pump seal will be damaged immediately if it is
run with the return line closed and the by-pass
screw inserted.
WARNING
Remove the plugs from the suction and return connections of the

pump.

Insert the hose connections with the supplied seals into the con-
nections and screw them down.
Take care that the hoses are not stretched or twisted during instal-
lation.
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 suction and return
lines.
4.11.3 Pump
Pump model TA2
Min. delivery rate at 290 PSI pressure
Delivery pressure range
Max. suction pressure
Viscosity range
Max. light oil temperature
Max. suction and return pressure
Pressure calibration in the factory

4.11.4 Pump priming

Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the seal located
WARNING
on the pump shaft to break.
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.
The priming operation is possible because the
pump is already full of fuel when it leaves the facto-
ry. If the pump has been drained, fill it with fuel
through the opening on the vacuum meter prior to
WARNING
starting; otherwise, the pump will seize.
Whenever the length of the suction piping exceeds
66 - 98 ft, the supply line must be filled using a sep-
arate pump.
20095074
Installation
GPH 150
PSI 102 - 580
"Hg 13
Key (Fig. 25)
1
cSt 4 - 800
2
°F 284 (140 °C)
3
PSI 72.5 4
5
PSI 360
6
Tab. L
24 GB
D10531
Suction
Return
Pressure gauge attachment
Vacuum gauge attachment
Pressure adjustment screw
By-pass screw
Fig. 24
D1979
Fig. 25
1/2" NPT
1/2" NPT
G 1/4"
G 1/4"