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5.11.6 Pump priming
Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
WARNING
organ located on the pump shaft to break.
In order for self-priming to take place, one of the screw 4)
(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 remote controls.
Check the fan wheel rotation direction as soon as the burner
starts.
The pump can be considered primed when the light oil starts
coming out of the screw 4). Stop the burner and screw screw
4) in.
D9249
Key to layout (Fig. 22)
1
-
Suction
2
-
Return
3
Pressure switch attachmentG 1/4"
4
- Vacuum meter connectionG 1/4"
5
Pressure governor
6
Screw for by-pass
7
-
Pressure gauge c
onnectionG 1/4"
PUMP SUNTEC TA5
Min. delivery rate at 16,5 bar pressure
- Delivery pressure range
- Max. suction depression
- Viscosity range
- Light oil max. temperature
- Max. suction and return pressure
- Pressure calibration in the factory
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,
as often as required. After 5 or 6 starting operations allow 2 or 3
minutes for the transformer 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.
20010950
Fig. 22
G 1/2"
G 1/2"
560 kg/h
6 - 30 bar
0,45 bar
4 - 800 cSt
140 °C
5 bar
22-20 bar
Installation
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
WARNING
through the opening on the vacuum meter 4)
(Fig. 22) 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.
5.11.7 Burner calibration
Note
It is advisable to first set the burner for operating on oil and then
for gas.
Execute the fuel exchange when the burner is
off.
WARNING
FIRING
Set switch 1) (Fig. 23) to "AUTO".
On the AZL display select the "MANUAL" operation mode, see
'Burner starting" on page 28.
During the first firing, during the passage from the 1st to the 2nd
stage, there is a momentary lowering of the fuel pressure caused
by the filling of the 2nd stage nozzle tubing. This lowering of the
fuel pressure can cause the burner to lock-out and can some-
times give rise to pulsations.
Once the following adjustments have been made, the firing of the
burner must generate a noise similar to the noise generated dur-
ing operation.
OPERATION
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet and interventions on the following
points:
•
Nozzles
See the information listed on page 18.
•
Combustion head
The adjustment of the combustion head already carried out
(page 19) need not be altered unless the 2nd stage delivery
of the burner is changed.
•
Pump pressure:
In order to adjust pump pressure, use the relevant screw
5) (Fig. 22). See the information listed on page 18.
22
GB
D3650
Fig. 23
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