Wilo CronoTwin-DL Einbau- Und Betriebsanleitung Seite 58

English
Fig. 19: Positioning the forked spacer
9.2.3 Changing the motor
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• Slightly loosen the coupling screws. Slightly open the pre-assembled
coupling.
• Install the motor with suitable hoisting gear and screw the lantern/
motor (and adapter ring for few BL pumps) connection together.
• Slide the forked spacer (Fig. 19, item 10) between the lantern and
coupling. The forked spacer must sit there without any play.
• First, slightly tighten the coupling screws (Fig. 1/2/3/4/5, item 1.41)
until the coupling half-shells are in contact with the shims.
• Afterwards, screw the coupling together evenly. In doing so,
the specified distance between the lantern and the coupling of 5 mm
is automatically adjusted via the forked spacer.
• Remove the forked spacer.
• Install the coupling guard.
• Connect the motor or mains connection cables.
Pump type design C:
• Pull a new mechanical seal onto the shaft. A commercially available
dishwashing liquid can be used as a lubricant (if required, insert the
key and the shim again).
• Install the impeller with washer(s) and nut, countering at the impel-
ler's outer diameter while doing so. Avoid damage to the mechanical
seal due to jamming.
• Slowly insert the pre-assembled drive with lantern unit (coupling,
shaft mechanical seal, impeller) into the pump housing using suitable
hoisting gear and screw it into place.
• Connect the motor or mains connection cables.
The motor bearings are maintenance-free. Increased bearing noises
and unusual vibrations indicate bearing wear. The bearing or motor
must then be changed. The drive may only be replaced by the Wilo
customer service.
• Switch off the system (voltage-free state) and secure it against being
switched on again.
• Make sure it is not live.
• Earth the work area and short-circuit.
• Close the shut-off devices upstream and downstream of the pump.
• Depressurise the pump by opening the air vent valve
(Fig. 1/2/3/4/5/6, item 1.31).
Dismantling:
DANGER! Risk of scalding!
Due to high fluid temperatures there is a danger of scalding.
• If the fluid is hot, allow it to cool down before all work.
NOTICE:
• When tightening screw connections in conjunction with the work
described in the following: Observe the screw tightening torque for
the thread type (see list "Tab. 5: Screw tightening torques" on
page 54).
• Disconnect the motor connection cables.
• Dismantle the coupling guard (Fig. 1/2/3/4/5/6, item 1.32).
Pump type design A/B:
• Dismantle the coupling (Fig. 1/2/3/4/5, item 1.5).
• Loosen the motor fastening screws (Fig. 1/2/3/4/5, item 5) on the
motor flange and lift the motor off the pump with suitable hoisting
gear. On BL pumps, the adapter ring comes loose (Fig. 3, item 8).
WILO SE 07/2018