This section is intended for personnel assigned to install the motor on the machine or system for which
the unit has been purchased. Therefore the importance of this section is emphasized since the optimum
operation of group machine/system – motor is the consequence of correct assembly of the parts; the
correct installation will limit the sources of danger for people working near to the structure.
Installation
Installation of OMS, OMT and OMV motor to the system
When assembling the motor in the machine/system it is the builder’s responsibility that the parts used
conform to the ATEX directive and that the components are assembled and running according to the
operational data/design found in product data sheets and instructions.
Only use the motor as required by the explosion protection shown on the name plate.
Always ensure that the following is maintained:
•
The supporting frame, chassis, or structure of equipment containing the motor shall be constructed
of electrically conducting material and shall be so arranged as to provide a leakage path to earth
(ground) for any static electricity which occurs on the motor.
•
It is compulsory to use oils whose inflammable degree is at least 50K above the maximum surface
temperature of the motor. Maximum surface temperature for Group IIG and IID can be found under
T
codes and maximum surface temperature for OMS, OMT and OMV motors
on page 6.
•
Make sure that all type of accessory installed on the motor are ATEX certified and have been installed
in accordance with ATEX requirements.
•
There are no creeping metal elements external to the motor.
•
There are no plastic parts that might accumulate electrostatic; or they are shielded.
•
Do not connect any object with an electrical resistance greater than 10
9
Ω to the motor.
•
The maximum permissible oil and ambient temperature is monitored and not exceeded for the
category and temperature class of the associated zone.
•
For installation in zones 21 and 22 the user has to adopt a scheduled periodic clearing plan of the
motor surface and recesses to prevent more than 5 mm thickness of dust deposits.
Regarding the assembly flange on the machine/system where the motor has to be installed: the relevant
surface has to be perfectly smooth, completely de-greased and non-deforming.
It is necessary to verify the perfect aligment between the motor output shaft and the counter part – the
fitment between motor shaft and application’s driven shaft must be executed so that no radial or axial
pre-load is generated – these extra loads reduce the bearings expected lifetime.
151-2062.10
User Manual
ATEX instruction for OMS, OMT and OMV
Installation, operation and maintenance
12 |
©
Danfoss | September 2016
11160602 | AQ00000213en-US0103
