15
3.3
Storage of the units
ATTENTION
Sulzer products must be protected from weather influences such as UV from direct
sunlight, high humidity, aggressive dust emissions, mechanical damage, frost etc.
Sulzer original packaging with the relevant transport securing devices (where used)
ensures optimum protection of the unit. If the units are exposed to temperatures
under 0 °C / 32 °F check that there is no water in the hydraulics, cooling system,
or other spaces. In the case of heavy frosts, the units and cable should not be
moved if possible. When storing under extreme conditions, e.g. in tropical or desert
conditions, suitable additional protective steps should be taken. We would be glad to
advise you further.
NOTE
Sulzer units do not generally require any particular maintenance during storage.
After long storage periods (after approx. one year), the transportation locking device
on the motor shaft (not with all versions) should be disassembled. By rotating the
shaft several times by hand, new lubricating oil, or depending on the version, a small
amount of coolant (which also serves to cool or lubricate the mechanical seals) is
applied to the sealing surfaces, thus ensuring perfect operation of the mechanical
seals. The bearings supporting the motor shaft are maintenance-free.
4
Product description
4.1
General description
•
Hydraulically optimized propeller with high wear resistance.
•
The motor shaft is supported in lubricated-for-life, maintenance-free ball bearings.
•
The shaft is sealed on the medium side by means of a high quality mechanical seal, which is independent of
direction of rotation.
•
The oil chamber is filled with lubricating oil (oil change is not necessary).
Motor
•
Three phase squirrel cage motor.
•
Rated voltage: 400 V 3~ 50 Hz / 460 V 3~ 60 Hz.
•
Other voltages available on request.
•
Insulation class F = 155 °C / 311 °F, Protection type IP68.
•
Temperature of the medium for continuous operation: + 40 °C / 104 °F.
Motor monitoring
•
All motors are fitted with temperature monitors that switch off the motor in the case of excessive
temperatures. The sensors must be correctly wired into the control panel.
Seal monitoring
•
The DI electrode carries out the seal monitoring function and signals the ingress of moisture by means of a
special electronic device.
Operation with frequency inverters
•
All RW / RCP, when
suitably selected
, can be used with frequency inverters.
Observe the EMC Directive
and the installation and operating instructions of the inverter manufacturer!