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Ex p Control unit
SILAS
pz
10 Maintenance and care
Types of purging gas
Maintenance work
Maintenance intervals
Rev. 0
Find out about the general safety instructions before starting
work (see Chapter 2.4 Safety instructions).
Carry out maintenance and care in accordance with the following sections,
unless otherwise agreed for customer-specific versions.
Only inert gas (e.g. nitrogen) or purified and dry instrument air is permitted as
purging gas. In any case, a filter must be installed upstream if the quality with
regard to foreign particles is not guaranteed. The following quality
characteristics of the purging gas should be met:
Residual dust: < 40 µm
Residual water: dew point +3 °C
Residual oil content: 1 mg/m³
MAINTENANCE INTERVALS
Maintenance according to the following maintenance schedule is
recommended in the case of proper operation, observing the
installation instructions and ambient conditions.
ATTENTION
MAINTENANCE AND CARE
The currently applicable regulations and the national provisions must
be observed for maintenance, service and inspection of the
equipment!
Operation and maintenance work may be performed by trained
specialist personnel only. The statutory regulations and the other
binding directives on occupational health and safety, accident
prevention and environmental protection must be observed.
When opening covers or removing parts, unless possible by hand, live
parts may be exposed. Connecting parts may also be live.
Maintenance interval
Monthly
Semi-annually
Annually
A1-37S2-7D0001_pz_Manual_Exp-Control-Unit_20210923_0_en.docx
Work to be performed
Visual inspection according to Chapter 10.2.2
Cleaning according to Chapter 10.2.3
Regular maintenance according to Chapter 10.2.4
Maintenance and care
Page 77 of 88
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