9.2.2 Changing The Motor - Wilo CronoLine-IL Betriebsanleitung

English
Fig. 14: Positioning the forked spacer

9.2.2 Changing the motor

36
• Insert the pre-installed lantern unit carefully into the pump housing
and screw together. As you do so, hold onto the rotating parts of the
coupling to avoid damage to the mechanical seal.
• Slightly loosen the coupling screws. Slightly open the pre-installed
coupling.
• Install the motor with suitable hoisting gear and screw the lantern/
motor (and adapter ring for BL pumps) connection together.
• Slide the forked spacer (Fig. 14, Item 10) between the lantern and
coupling. The forked spacer must fit without any play.
• First, slightly tighten the coupling screws (Fig. 1/2/3, Item 1.41) until
the coupling half-shells are in contact with the spacer discs. After-
wards, screw the coupling together evenly. In doing so, the specified
distance between the lantern and the coupling of 5 mm is automati-
cally adjusted via the forked spacer.
• Remove the forked spacer.
• Install the coupling protection.
• Connect the motor or power cables.
The motor bearings are maintenance free. Increased bearing noise
and unusual vibrations are a sign of bearing wear. The bearing or
motor must then be replaced. The drive may only be replaced by Wilo
customer service.
• Disconnect the system from the power supply and secure it against
being switched on again.
• Close the check valves in front of and behind the pump.
• Depressurise the pump by opening the vent screw (Fig. 1/2/3,
Item 1.31).
DANGER! Risk of scalding!
Due to high fluid temperatures there is a risk of scalding.
• If the fluid is hot, allow it to cool down before performing any work.
NOTE
• When tightening screw connections in conjunction with the work
described in the following: Observe the screw tightening torque for
the thread type (see section "Screw tightening torques" on page 37).
• Disconnect the motor connection cables.
• Dismantle the coupling protection (Fig. 1/2/3, Item 1.32).
• Dismantle the coupling (Fig. 1/2/3, Item 1.5).
• Loosen the motor fastening screws (Fig. 1/2/3, 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).
• Install the new motor with suitable hoisting gear and screw the lan-
tern/motor (and adapter ring for BL pumps) connection together.
• Check the coupling and shaft sliding surfaces. If necessary, clean and
lightly oil them.
• Pre-install coupling shells on the shafts with spacer discs inserted in
between them.
• Slide the forked spacer (Fig. 14, Item 10) between the lantern and
coupling. The forked spacer must fit without any play.
• First, slightly tighten the coupling screws until the coupling half-
shells are in contact with the spacer discs. Afterwards, screw the cou-
pling 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 protection.
• Connect the motor cable.
WILO SE 09/2010