Motor; Changing The Motor - Wilo CronoLine-IL 250 Série Notice De Montage Et De Mise En Service

9.3

Motor

9.3.1 Changing the motor

Installation and operating instructions Wilo-CronoLine IL 250...
• Rotate the motor shaft in such a way that the motor shaft key and the
impeller key oppose each other.
• Put the first coupling half on the two keys and the retaining washers
(Fig. 15).
• Align the threaded hole in the impeller shaft retaining washer to the
installation drilled hole of the coupling half.
• Insert one of the coupling screws into the installation drilled hole and
screw in (Fig. 16) half way.
• Tighten the central screw of the impeller shaft with the prescribed
torque (see 7.5). Use a strap wrench to apply counter pressure.
• Tighten the assembly screw (Fig. 16) (see 7.5).
• Tighten the central screw of the motor shaft with the prescribed
torque (see 7.5). (Fig. 17, Item 1). Use a strap wrench to apply counter
pressure.
• Insert the second key (Fig. 18, Item 2) of the impeller shaft.
• Put on the second coupling half (Fig. 18, Item 1).
• Evenly screw the available coupling screws; as a final step, the cou-
pling screw from the assembly drilled hole (Fig. 19).
NOTE:
Pay attention to the prescribed screw torque (see the table in
chapter 9.4 "Screw tightening torques" on page 43).
• Unscrew both mechanical seal press-out screws from the cover.
• Carefully vertically press the mechanical seal into its seat. Avoid dam-
age to the mechanical seal due to jamming. (Fig. 20).
• Screw in the four cover screws (Fig. 21, Item 1) and tighten them with
the prescribed torque (see the table in chapter 9.4 "Screw tightening
torques" on page 43).
• One after the other, screw in and tighten the four hexagon socket
screws (locking pins; Fig. 21, Item 2) (see 7.5).
• Install the coupling protection metal sheets (Fig. 22).
• Connect the motor cable.
The motor bearings have been lifetime lubricated. Increased bearing
noise and unusual vibrations are a sign of bearing wear. The bearing or
motor must then be replaced.
DANGER! Danger of death!
There is a mortal danger through shock when working on electrical
equipment.
• Before working on electrical equipment, switch it off and prevent
it from being switched on again.
• Close the check valves in front of and behind the pump.
• Depressurise the pump by opening the vent screw (Fig. 1, Item 2).
DANGER! Risk of scalding!
Due to high fluid temperatures there is a risk of scalding.
• At high fluid temperatures, let the pump cool down before starting
any work.
• Disconnect the motor connection cables.
• Dismantle the coupling protection metal sheets (Fig. 1, Item 1).
• Press the mechanical seal out of its seat and dismantle the coupling
(see "Dismantling" in chapter 9.2.2 "Replacing the mechanical seal"
on page 39 and Fig. 1 ... 8).
WARNING! Danger of personal injury!
Incorrect dismantling of the motor can result in personal injury.
• Before dismantling the motor, be sure that the centre of gravity is
not above the holding point.
• Secure the motor against tipping over during transport.
English
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