8�2
Maintenance intervals
Î
Inspect the WEH
®
Product at regular intervals depending on the respective oper-
ating conditions, but at least every 3 months. After 20,000 cycles or 3 years at the
latest, depending on what happens first, starting from the date of delivery (invoice/
goods issue date by WEH or the distributor), the WEH
®
Product must be sent to
WEH for maintenance.
These intervals can also be significantly shorter, which depends especially on your
individual application/use. Therefore, in case of abnormalities – especially during
regular inspection – send the WEH
®
Product immediately to WEH for maintenance.
Products that are used at sea or in the vicinity of the sea must be sent to WEH for
maintenance after one year at the latest.
If the WEH
®
Product is not regularly inspected and sent to WEH for maintenance,
leakage may occur and under certain circumstances this may result in failures
and/or accidents.
8�3
Overview of minimum intervals for inspection and maintenance
No�
Inspection
Initial
(before com-
missioning
for the 1st
time)
Weekly
Monthly
1
Check exterior for damage and dirt
X
X
2
Check filter, media inlet and media outlet
for leakage (see
X
X
3
Check pressure drop across filter section
X
X
Note:
Component arrangement see
Chapter 3. Product overview / product description on
Î
If your application requires, set shorter intervals than indicated above. A significant
shortening of the minimum intervals is particularly necessary if abnormalities are
found during the inspections.
8�4
Maintenance
Please note:
Subsequent mentions of descriptions and position numbers refer to
Chapter 3. Product overview / product description on page 11
Î
If you detect any leaks or malfunction, replace the WEH
®
Product or send it to WEH
for maintenance. Stop using the product immediately.
The following maintenance work for filters in industrial systems may be carried out by
the operator:
Î
Inspect the WEH
®
Product for leak tightness and correct function –ease of move-
ment, sufficient lubrication with substances approved by WEH for this application
(see
), wear, contamination, damage.
MD-10211-L51-R1.1.0-03
Page 21
Operating instructions
AE
