Elmo Rietschle L-BV5 Operating instructions - Manual (Page 26)

Maintenance
610.44440.40.000 26 / 32 © Gardner Denver Deutschland GmbH
9.1 Maintenance
Interval Maintenance procedure
monthly  check the piping and screwed joints for leakage and secure fixing then reseal
and retighten them as necessary.
monthly  check the terminal box cover and cable entry openings for proper sealing and
reseal if necessary.
dependent on the
concentration of
contaminant particles
in the ambient air Check the fan guard, the external fan and the cooling vanes on the motor for
contamination and clean if necessary
 Take protective measures appropriate for the use of compressed air:
get personal protection gear (gloves and protective safety glasses).
secure the surrounding area. Remove any objects lying around in the area.
 Clean the fan guard, external fan and motor cooling vanes using compressed
air.
 separator, filter or strainer to be installed in the supply line. dependent on the
concentration of con-
taminant particles in
the operating-liquid
Flushing the pump casing
 Shut down the unit.
 Dismantle the piping / hoses.
 Place suitable drain-off containers underneath the cover.
 Open the screwed plugs in all drain tappings (item 4, page 3).
 Connect a hose to the discharge connection and run it to the drain-off container.
 Connect a flushing liquid hose to the operating-liquid connection.
use a clean, non-hazardous medium (e.g. water) for flushing.
 Start the unit up and keep the flushing liquid supply flowing continuously.
- contaminants will be flushed out of the pump casing along with the flushing
liquid.
- continue the procedure until the flushing liquid emerges free of contamina-
tion.
 Shut down the unit.
 Remove the hoses from the discharge connection and from the operating-liquid
connection and reconnect the system piping to the unit.
 Close the screwed plugs in all drain tappings (item 4, page 3). Tightening
torques: 2 ... 3 Nm [1.48 ... 2.21 ft lbs].
 Operating-liquid to be softened.
Decalcifying the unit (3-monthly intervals)
 Get personal protection gear (gloves and protective safety glasses).
 Shut down the unit.
 Drain the unit down (see chapter 8.1, "Draining down", page 23).
 Dismantle the piping / hoses.
 Fill the unit with decalcifying agent through one of the connection openings. use
a 10% acetic acid concentrate or another commercially available decalcifying
agent.
 Leave the decalcifying liquid in the unit for at least 30 min.
 Whilst doing so turn the shaft in its normal direction from time to time (Fig. 15,
page 23).
depending on the
hardness of the oper-
ating-liquid
(hardness > 15°dH)
2BV2 …:
 Screw in an M8 bolt of sufficient length into
the shaft end on the external fan side.
 Use a wrench to turn the shaft manually.
 Remove
the bolt.
2BV5 …:
 Remove the fan guard.
 Turn the external fan by
hand.
 Refit the fan guard.