6. Maintenance
Clean the filter inserted in the bathtub suction
opening at regular intervals.
The pump does not require servicing except for
disassembly for cleaning and removal of any
obstruction from inner parts and the draining hole
when, with use and in the course of time, perfor-
mance or self-draining capacity are found to be
reduced.
Avoid cleaning an installed pump by hosing down
directly with jets of water without protection
panels on the bathtub.
Disconnect electrical power be-
fore any servicing operation and
make sure the pump cannot be
accidentally switched on.
7. Dismantling
For dismantling and re-assembly see construction
in the cross-section drawing (page 14).
Remove the motor assembly with the lantern
bracket (32.00) from the pump casing (14.00),
after removing the screws (14.24), the nuts
(14.28) and the washers (14.29), levering them
out with two screwsdrivers in diametrically oppo-
sed positions.
To remove the impeller (28.00) insert a large
straight-blade screwdriver in the slot on the shaft
(78.00) at the ventilation end. Grip the impeller
with one hand and unscrew it, turning the shaft
counter-clockwise
and twisting with both
hands (fig. 3a).
If it is not possible to hold or move the shaft with
the screwdriver, remove the fan cover (90.00) and
motor fan (88.00) and unscrew the impeller by
gripping the shaft with a suitable wrench.
With the impeller the rotating part of the mechani-
cal seal (36.00) will remove.
8. Re-assembly
To replace the mechanical seal (36.00) fit the
rotating part over the impeller hub (28.00) and
push the spring right down as far as the front
shoulder. In this way, correct spring compression
will be ensured in subsequent assembly.
Lubricate the seal with water and align the
impeller on the motor shaft.
ATTENTION: with the three-phase models, to
avoid the unscrewing (and breaking) of the
impeller should the motor start rotating
backwards
, clean the threaded shaft end and
apply on the first half of the threaded part Loctite
638 (to avoid unscrewing due to the resistant-force
of the water in the case of a backward rotation).
Grip the impeller with one hand and turn the
shaft with a screwdriver in the
clockwise
direction until tight.
With this operation the front surfaces of the
mechanical seal come into contact without rub-
bing against each other during tightening.
Clean the O-ring (14.20) and seal surfaces with
water.
When replacing the motor assembly
with the impeller, be careful to insert
t h e l o c a t i n g l u g i n s i d e t h e p u m p
casing
(14.00)
into the locating slot on
the diffuser cover
(27.00).
9. Spare parts
When ordering spare parts, please quote the data
stamped on the name-plate, the part designation
and the position number of each spare part required
(in accordance with the cross-section drawing on
page 14).
For safety and hygiene, any
pumps that
require inspection/repair
must be
drained and carefully cleaned inside and
outside before dispatch/submission.
Through the pump ports, wash down all
accessible parts.
Changes reserved.
7
Fig. 3 Dismantling (a) and remounting (b) the impeller
a
b
