ARAG 8537 Serie Instalación Uso Y Mantenimiento página 11

6 USE
Power the valve using a suitable control device (refer to
CAUTION: Do not run light valve for a long time, the inside gaskets could be damaged and
the valve could block up.
7 MAINTENANCE
The electric ball valves of the 853 series do not require any particular maintenance.
Internal cleaning can be carried out when the system to which the valve is connected is cleaned. If the
maintenance man needs to open the valve to check the seal or for extraordinary cleaning, before fitting it
back you must replace the seal kit of the orifice that was opened.
CAUTION: Fitting back the valve without replacing the seal kit can reduce the seal on the
internal ball and therefore cause leaks.
- Unscrew the bolts related to the orifice to be opened, then remove it and take out the inner gaskets and
the O-ring inserted in the internal seat of the flange that has been removed.
- Re-position all the gaskets in their seats, as shown in
then close the flange.
- Insert the bolts in the holes, fit back the washers and screw in the nuts by hand.
- To ensure correct operation, the nuts (2) must be tightened using a dynamometric spanner calibrated
according to that which is indicated in
- Reconnect all the hydraulic connections.
- Restore electric power supply.
- Put the system under pressure ONLY WITH CLEAN WATER and check that the connections are not leaking.
Further information on the special maintenance operations can be downloaded free of charge from our
Website www.aragnet.com.
8 TROUBLESHOOTING
FAULT
The valve leaks or the seal of
the ball is not enough
The valve does not work
The valve does not stop at the
preset point
9 DISPOSAL
Dispose of the system in compliance with the established legislation in the country of use.
10 WARRANTY
The product is guaranteed for a period of 12 months from the purchase date. Complete information on the
warranty is provided in the ARAG general catalogue and on our Website at the address www.aragnet.com.
.
Tab. 1
CAUSE
Presence of foreign bodies
Worn seals
Lack of power
The harnesses are not connected
correctly
Power supply voltage is lower than
the minimum value
Geared motor broken
Geared motor broken
11
for the exact absorption values).
Tab. 1
Fig. VI (gasket (1) is not present on all models),
REMEDY
• Make sure there are no foreign bodies; if so,
remove them.
• Replace the seals.
• Check the connections and the cables.
Replace the cable. If the problem persists,
contact your nearest Service Centre.
• Check the connections and the cables.
• Make sure that the harnesses are suitable
for the system
• Replace the geared motor.
• Replace the geared motor.
GB