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5.12.5 Hydraulic system layout
15
P
V
M
1
3
4
2
Key to layout (Fig. 21)
1
Pump suction
2
Pump and nozzle return
3
By-pass screw in pump
4
Pump pressure governor
5
Safety solenoid
6
Safety solenoid
7
Nozzle delivery
8
Nozzle without interception pin
9
Nozzle return
10 Pressure regulator on nozzle return
11 Servomotor
12 Pressure switch on nozzle return
13 Safety valve on nozzle return
14 Safety valve on nozzle return
15 Pressure switch on pump delivery
B
Oil valve assembly and pressure variator
M
Pressure gauge
V
Vacuometer
OPERATION
Pre-purging phase:
of closed valves 5), 6), 13) and 14).
Firing phase and operation:
of opened valves 5), 6), 13) and 14).
Halt: all the valves closed.
20009655
SM
M
M
6
5
10
12
14
13
P
Installation
5.12.6 Pump priming
7
8
WARNING
9
➤ 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
B
starts.
➤ The pump can be considered primed when the light oil starts
coming out of the screw 4). Stop the burner and screw
11
screw 4) in.
SM
D8362
Fig. 21
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 connectionG 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.
22
GB
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.
G 1/2"
G 1/2"
Fig. 22
560 kg/h
6 - 30 bar
0,45 bar
4 - 800 cSt
140 °C
5 bar
25 bar
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