Riello PRESS GBV, Инструкции по установке, использованию и обслуживанию

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20033090
22 GB
Installation
5.11.3 The loop circuit
This is composed by piping that leaves from the tank and returns
to the same with an auxiliary pump that circulates the fuel under
pressure. A branch connection from the loop goes to feed the
burner. This circuit is extremely useful whenever the burner pump
does not succeed in self-priming because the tank distance and/
or height difference are higher than the values listed in the Table.
Contact our Engineering Department for further information re-
garding single-pipe systems and the loop circuit.
Altitude: Altitude has a determined effect on pipe suction power.
At altitudes of more than 200 meters above sea level, the level
difference, in metres, between the pump and the foot valve must
be corrected by the factor “F”, see (Tab. J), in order to obtain the
equivalent height difference with which to determine the maxi-
mum piping length, i.e.:
if a suction-type system is involved:
(equivalent) He = (real) H + F
if a siphon-type system is involved:
(equivalent) He = (real) H - F
where:
F = (real altitude) (m - 200) / 1000
m = Altitude in m a.s.l.
F = Compensation factor
Tab. J
Example:
Suction type system .....................................................- H = 2 m
Piping diameter .........................................................Ø = 10 mm
5.12 Pump
Pump ANV 67 A7
1 - Suction G 1/4"
2 - Return G 1/4"
3 - Pressure gauge attach. G 1/8"
4 - Vacuummeter attachment G 1/8"
5 - Pressure adjustment screw:
Right rotation = pressure increases
Left rotation = pressure decreases
5.12.1 Technical data
Tab. K
G = cylindrical thread
The connector to be screwed into the cylindrical thread G must
be equipped with a sealing washer.
Do not screw a connector with a conical thread (NPTF) into the
cylindrical thread G.
NOTE
• The pump is equipped with a bypass that connects return line
and the suction line.
The pump is installed on the burner with the bypass closed by
screw 6) (Fig. 31 on page 29).
When single-pipe fuel supply systems without degaussing
units (Fig. 19 on page 21) are used, this screw, accessible
from the connector 2), must be removed. In this way, the ex-
cess in the delivery discharged by the pressure regulator into
the return line passes into the suction line.
The pump will break immediately if it is run with the return line
closed and the bypass screw inserted.
• The vacuum meter attachment is located upstream from the
pump filter and consequently it is not able to detect a clogged
filter.
• The pump is delivered from the factory already full of fuel and
with its return and suction connections plugged. This stops the
gear unit rusting and permits the pump to prime upon first
starting.
• Water must be prevented from accumulating on the bottom of
the tank, due to infiltration or condensation, and subsequently
reaching the pump. Water in the pump will lead to rusting and
eventually the pump will have to be renewed.
m 200 300 600 900 1200 1500 1800 2100
F 0 0,1 0,4 0,7 1 1,3 1,6 1,9
Altitude m 200 1200
F 0 1
- H m 2 2 + 1 = 3
Piping lenght m 27 16
WARNING
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.
Please contact Riello for further information.
Fig. 20
PUMP SUNTEC
D376
type ANV 67 A7
Pump SUNTEC ANV 67 A7
Delivery pressure range bar 10 - 20
Max. suction depression bar 0.45
Viscosity range
mm
2
/s (cSt)
2 - 75
Max. gas oil temperature °C 60
Max. suction and return pressure bar 2
Pressure calibration in the factory bar 14
Filter mesh width mm 0.150