Condensate Drain; Cleaning; Long Term Storage (More Than 12 Months); Additional Devices (Optional) - VEM W41 Series Installation, Operating And Maintenance Instructions

Installation, Operating and Maintenance Instructions (Translation)
The motors up to size 315M are equipped as standard with anti-friction bearings with life-time lubrication. From size
315MX upwards they are equipped with lubrication devices which can be ordered for smaller motors as option.
Information about bearings and lubrication can be found in the general installation, maintenance and operation
manual or on the name plate or lubrication sign.
Maintenance works (without lubrication) has to be done at standstill of the motor.
It has to be assured that the machine is secured against re-connection and labelled with an appropriate
sign.
In addition the security advices and accident prevention regulations of the manufacturers for the use of oils, lubri-
cants and detergents has to be observed!
Adjacent live parts have to be covered or secured! It has to be assured that the auxiliary circuits like anti-
condensation heating are dead (zero potential).
For design versions with condensate drain hole please observe that the drain plug screw has to be lubricated with a
suitable sealant (for example Epple 28) before relocking.

12.4 Condensate drain

In places of operation where condensation and therefore resulting condensate water inside of the motor is ex-
pected, the condensate drain hole at the lowest point of the end shield must be opened regularly to drain the con-
densate water. Afterwards the hole must be closed again.

12.5 Cleaning

The effect of cooling air must not be hindered. Therefore all parts of the motor must be cleaned regularly. In most
cases it is sufficient to clean with a jet of water- and oil-free compressed air. Especially the air inlets and spaces
between cooling rips must be kept clean. Coal dust from natural friction inside of the motor or inside the slip ring
compartment must be removed regularly. It is recommended to include the electric motor in the regular inspections
of the work machine.

13. Long term storage (more than 12 months)

Long term storage must be done indoors in vibration-free, dry rooms with temperatures not below -20°C and not
above +40°C. The storage environment must not contain aggressive gas, vapours, dusts and salts. Preferably mo-
tors shall be moved and stored only in original packing. Storage and transport with motors standing on their fan
covers is not allowed. Additionally unprotected metal surfaces like shaft ends and flanges must be protected with a
medium for long-time corrosion protection in addition to the existing factory-provided temporary corrosion protec-
tion. If there is a risk of motors being covered by moisture from condensation, please provide precautionary
measures against humidity. Than a special packing in airtight sealed plastic foil is necessary or as alternative pack-
ing in plastic foil with desiccants. Please put desiccant bags in the terminal box as well.
For the transport please use the eye bolts/attachment eyes of the motors together with suitable lifting accessories.
The eye bolts/attachment eyes must only be used for lifting the motors without additional mountings like foundation
plates, gears and others.
Motors with reinforced bearings are supplied with a transportation safety device. The transportation safety device at
the shaft end must only be removed during installation of the motor and before switching on.

14. Additional devices (optional)

14.1 Thermal motor protection

Motors with Thermal Winding Protection
For monitoring the stator winding temperature it is possible to have thermo couples installed in the motor (PTC
thermistors, KTY or PT100). For their connection suitable auxiliary clamps for auxiliary circuits are available in the
main terminal box or in additional terminal boxes. The connection is done according to the attached connection
diagram.
A continuity test of the thermistor sensor circuit using a test lamp, a hand generator and such like is strictly prohib-
ited because this would destroy the sensors immediately. If it becomes necessary to verify the cold resistance of
the sensor circuit (at approx. 20C) then the measuring voltage must never exceed 2.5 V DC. It is recommended to
carry out the measurement using a Wheatstone bridge with a 4.5 V DC supply voltage. The cold resistance of the
sensor circuit must never exceed 810 Ohms; a measurement of the hot resistance is not necessary.
With motors that are fitted with thermal winding protection, care must be taken that when the thermal
winding protection responds and after the cooling down of the motor, no hazards can occur due to spuri-
ous automatic reconnection.
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VEM motors GmbH-2013
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English