Xylem LOWARA ecocirc PRO - 6.4 Motor and Pump Replacement

en – Original Instructions
ecocirc PRO – Installation, Operation and Maintenance Manual 27
6.4 Replacing the pump motor
6.4.1 Replacement motors
The pump is also available as a drive unit, without pump housing (models 00-
_
/000) for
replacement.
Depending on the pump, what is to be replaced, different seals need to be used.
1. Replacing an old - type identical - pump motor, keeping its own old pump housing in the
piping, with a new replacement pump motor:
• Use the additionally included, 5 mm thick flat seal (item
16 in Figure 3) supplied with the
replacement unit.
• The blade height of the rotor, supplied with the replacement motors is lower than that of the
original rotor, therefore the hydraulic performance will be reduced after the change.
2. Replacing an old – not type identical - pump motor on its own pump housing, provided that
its geometry is fitting, with a new replacement pump motor:
• Use the additionally included, 5 mm thick flat seal (item
16 in Figure 3) supplied with the
replacement unit.
3. Replacing an old WILO pump motor on a WILO pump housing with a new replacement pump
motor:
• Use the additionally included, 5 mm thick flat seal (item
16 in Figure 3) with the brass spacer
ring (item
17 in Figure 3) inserted inside supplied with the replacement unit.
• The spacer ring is to set the proper distance between the pump housing and the rotor.
Corresponding replacement list available on request.
The hydraulic curves on page
31 are not valid for replacement motors.
6.4.2 Pump units for replacement
The standard pump units can be also used for replacement. It is recommended to use this
option, if it is important to maintain the original hydraulic performance.
1. Replacing an old - type identical - pump motor, keeping its own old pump housing in the
piping, with the motor of a new standard pump unit:
• Use the new o-ring (item
7 in Figure 3) pre-installed in the new pump unit.
2. Replacing an old – not type identical - pump motor on its own pump housing, provided that
its geometry is fitting, with the motor of a new standard pump unit:
• Use the additionally included, 3.55 mm thick flat seal (item
15 in Figure 3) supplied with the
pump unit.
NOTICE:
Keeping the pre
-installed o-ring (item
7
in
Figure 3
) may lead to water leakages,
due to a
possibly available extra ridge in the sealing surface of the - not type identical - pump housing.
NOTICE:
T
he standard pump units are not suitable for replacing WILO pump
motors on WILO pump
housings.