Maintenance and repair
Ex p control unit
Motor Purge Controller
Page 76 of 96
01-37A2-7D0003_Operating instructions_MPC_20210923_0_en.docx
Rev. 0
10
Maintenance and repair
Read the general safety instructions carefully before starting any
work (see Chapter 2.4 Safety instructions).
Perform any maintenance and repair work in accordance with the following
sections, unless otherwise agreed for customer-specific control units.
10.1
Types of purge gas
Only inert gas (e.g. nitrogen) or purified and dry instrument air is permitted as
purge gas. In any case, a filter must be connected upstream if the quality is not
guaranteed with regard to foreign particles. The following quality characteristics
of the purge gas should be met:
Residual dust: < 40 µm
Residual water: Dew point +3 °C
Residual oil content: 1 mg/m³
10.2
Maintenance work
Maintenance intervals
MAINTENANCE INTERVALS
If the unit is operated properly and the installation instructions
and ambient conditions are observed, maintenance is
recommended in accordance with the following maintenance
interval schedule.
CAUTION
MAINTENANCE AND REPAIR
Comply with the currently applicable provisions and the national
regulations for the maintenance, servicing and inspection of the
operating equipment!
Any operating and maintenance work may only be carried out by
trained specialist personnel. The legal regulations and other binding
guidelines for occupational safety, accident prevention and
environmental protection must be observed.
When opening covers or removing parts, unless this is possible by
hand, live parts may be exposed. Connecting parts may also be under
voltage.
Maintenance interval
Work to be performed
Monthly
Visual inspection in accordance with Chapter 11.1.2
Semi-annual
Cleaning in accordance with Chapter 11.1.3
Annually
Regular maintenance in accordance with Chapter
11.1.4
