Riello 1311 T2, Modulating Operation, Page: 25 / 60

23
20040170
GB
Installation
5.12 Pump
5.12.1 Technical data
Tab. H
Key (Fig. 20)
1
Suction line G 1” 1/2
2 Return line G 3/4”
3 Gauge connection G 1/4”
4 Vacuometer connection G 1/4”
5 Pressure adjuster
5.12.2 Priming pump

In order for self-priming to take place, the screw 4) on the
pump (Fig. 20) must be loosened to bleed off the air con-
tained in the suction line.

Start the burner by closing the remote controls. As soon as the
burner starts, check the direction of rotation of the fan blade.

The pump can be considered to be primed when the light oil
starts coming out of the screw 4).

Close the burner and undo the screws 4).
The time required for this operation depends upon the diameter
and length of the suction tubing.
If the pump fails to prime at first start-up and the burner locks out,
wait approx. 15 seconds, reset the burner, and then repeat the
start-up operation. And so on.
After 5 or 6 starting operations allow 2 or 3 minutes for the trans-
former to cool.
Do not illuminate the QRI cell or the burner will lock out; the burn-
er should lock out anyway about 10 seconds after it starts.
Pump RLS 1000/EV C13
VBHRG
RLS 1200/EV C13
VBHGRP
Min. delivery rate at 40 bar pressure 1160 kg/h 1660 kg/h
Delivery pressure range 9 - 40 bar 9 - 40 bar
Max. suction depression 0.6 bar 0.6 bar
Viscosity range 6 - 800 cSt 6 - 800 cSt
Max. light oil temperature 140°C 140°C
Max. suction and return pressure 5 bar 5 bar
Pressure calibration in the factory 18 bar 18 bar
Fig. 20
D11321
WARNING
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.
WARNING
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 vacuometer 4) (Fig. 20) 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.